Triple USB Switch with Autoreset and Fault Blanking

Transcription

1 ; Rev 1; 2/1 Triple US Switch with utoreset and General escription The triple current-limited switch with autoreset supplies a guaranteed 5m load per channel in accordance with US specifications. The operates from a 4V to 5. input supply and consumes only 6µ of quiescent current when operating and only 3µ in standby. Selectable active-high/active-low control logic and independent shutdown controls for each channel provide additional flexibility. n autoreset feature latches the switch off in the event of a short circuit, saving system power. The switch reactivates upon removal of the shorted condition. The provides several safety features to protect the US port. uilt-in thermal-overload protection turns off the switch when the die temperature exceeds +16. ccurate internal current-limiting circuitry protects the input supply against both overload and shortcircuit conditions. Independent open-drain fault signals (FULT, FULT, and FULT) notify the microprocessor when a thermal-overload, current-limit, undervoltage lockout (UVLO), or short-circuit fault occurs. 2ms fault-blanking feature enables the circuit to ignore momentary faults, such as those caused when hot-swapping a capacitive load, preventing false alarms to the host system. The fault-blanking feature also prevents fault signals from being issued when the device powers up the load. The is available in a space-saving 16-pin QSOP package and operates over the extended (-4 to +85 ) temperature range. US Ports US Hubs Notebook omputers esktop omputers TOP VIEW ON 1 IN1 2 IN2 3 IN3 4 ON 5 IN4 6 IN5 7 ON 8 pplications Ps and Palmtop omputers ocking Stations Pin onfiguration QSOP 16 FULT 15 OUT 14 GN 13 OUT 12 FULT 11 SEL 1 OUT 9 FULT Features Triple US Switch in Tiny 16-Pin QSOP Package utoreset Feature Saves System Power Guaranteed 5m Load urrent per hannel uilt-in 2ms Fault-lanking ircuitry ctive-high/ctive-low ontrol Logic Fully ompliant to US Specifications 4V to 5. Input Voltage Range Independent Shutdown ontrol Independent Fault Indicator Outputs Thermal-Overload Protection 3µ Standby urrent INPUT 4V TO 5. TIVE-HIGH/TIVE-LOW SELETLE Ordering Information PRT TEMP RNGE PIN-PKGE EEE -4 to QSOP Typical Operating ircuit IN1 IN2 IN3 IN4 IN5 ON ON ON SEL GN FULT FULT FULT OUT OUT OUT US PORT US PORT US PORT Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim irect at , or visit Maxim s website at

2 SOLUTE MXIMUM RTINGS IN_, ON_, OUT_, SEL, FULT_, to GN...-.3V to +6V IN1, IN2 to OUT...-.3V to +6V IN2, IN3 to OUT...-.3V to +6V IN4, IN5 to OUT...-.3V to +6V OUT_ ontinuous Switch urrent (per channel, internally limited) FULT_ urrent...2m ontinuous Power issipation (T = +7 ) 16-Pin QSOP (derate 8.3mW/ above +7 )...667mW Operating Temperature Range...-4 to +85 Junction Temperature Storage Temperature Range to +15 Lead Temperature (soldering, 1s)...+3 Stresses beyond those listed under bsolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELETRIL HRTERISTIS (V IN_ =, IN_ =.1µF, OUT_ = 1µF, T = to +85, unless otherwise noted. Typical values are at T = +25.) PRMETER SYM O L ONITIONS MIN TYP MX UNITS Supply Voltage Range V IN_ V Switch On-Resistance R ON T = to +85, each switch mω Standby Supply urrent ll switches disabled 3 1 µ One switch enabled, I OUT_ = Quiescent Supply urrent I IN_ Two switches enabled, I OUT_ = 55 9 ll switches enabled, I OUT_ = 63 1 µ OUT_ Off-Leakage urrent I LKG ll switches disabled, V OUT_ =, T = to µ Undervoltage Lockout Threshold V ULVO Rising edge, 3% hysteresis V ontinuous Load urrent 5 m ontinuous urrent Limit I LIM V IN_ - V OUT_ = Short-ircuit urrent Limit I S V OUT_ = (I OUT_ pulsing) PK.35 RMS Short-ircuit etect Threshold (Note 1) 1 V ontinuous urrent-limit lanking Timeout Period Short-ircuit lanking Timeout Period From continuous current-limit condition to FULT_ asserted From short-circuit current-limit condition to FULT_ asserted ms ms Turn-On elay t ON R OUT_ = 1Ω, does not include rise time (from ON_ to 1% of V OUT_ ) ms Output Rise Time t RISE R OUT_ = 1Ω, from 1% to 9% of V OUT_ 2.5 ms Turn-Off elay t OFF R OUT_ = 1Ω, does not include fall time (from ON_ to 9% of V OUT_ ).8 3 ms Output Fall Time t FLL R OUT_ = 1Ω, from 9% to 1% of V OUT_ 2.5 ms Thermal-Shutdown Threshold 15 hysteresis 16 ON_, SEL Input High Level V IH V IN_ = 4V to 5. 2 V ON_, SEL Input Low Level V IL V IN_ = 4V to 5..8 V ON_, SEL Input Leakage urrent V ON_ = or V IN_ µ 2

3 ELETRIL HRTERISTIS (continued) (V IN_ =, IN_ =.1µF, OUT_ = 1µF, T = to +85, unless otherwise noted. Typical values are at T = +25.) PRMETER SYM O L ONITIONS MIN TYP MX UNITS FULT_ Output Low Voltage V OL I SINK = 1m, V IN_ = 4V.4 V FULT_ Output High Leakage urrent V IN_ = V FULT_ = 5. 1 µ OUT_ utoreset urrent In latched off state, V OUT_ = m OUT_ utoreset Threshold In latched off state, OUT_ rising V OUT_ utoreset lanking Time In latched off state, V OUT_ > ms ELETRIL HRTERISTIS (V IN_ =, IN_ =.1µF, OUT_ = 1µF, T = -4 to +85, unless otherwise noted.) (Note 2) PRMETER SYM O L ONITIONS MIN MX UNITS Supply Voltage Range V IN_ V Switch On-Resistance R ON Each switch 135 mω Standby Supply urrent ll switches disabled 1 µ One switch enabled, I OUT_ = 75 Quiescent Supply urrent I IN_ Two switches enabled, I OUT_ = 9 ll switches enabled, I OUT_ = 1 µ OUT_ Off-Leakage urrent I LKG ll switches disabled, V OUT_ = 1 µ Undervoltage Lockout Threshold V ULVO Rising edge, 3% hysteresis V ontinuous Load urrent 5 m ontinuous urrent Limit I LIM V IN_ - V OUT_ = Short-ircuit urrent Limit I S V OUT_ = (I OUT_ pulsing) PK ontinuous urrent-limit lanking Timeout Period Short-ircuit lanking Timeout Period From continuous current-limit condition to FULT_ asserted From short-circuit current-limit condition to FULT_ asserted 1 35 ms ms Turn-On elay t ON R OUT_ = 1Ω, does not include rise time (from ON_ to 1% of V OUT_ ) Turn-Off elay t OFF R OUT_ = 1Ω, does not include fall time (from ON_ to 9% of V OUT_ ).5 4. ms 3 ms ON_, SEL Input High Level V IH V IN_ = 4V to 5. 2 V ON_, SEL Input Low Level V IL V IN_ = 4V to 5..8 V ON_, SEL Input Leakage urrent V ON_ = or V IN_ µ FULT_ Output Low Voltage V OL I SINK = 1m, V IN_ = 4V.4 V FULT_ Output High Leakage urrent V IN_ = V FULT_ = 5. 1 µ OUT_ utoreset urrent In latched off state, V OUT_ = 1 5 m OUT_ utoreset Threshold In latched off state, OUT_ rising.4.6 V OUT_ utoreset lanking Time In latched off state, V OUT_ > ms Note 1: Short-circuit detect threshold is the output voltage at which the device transitions from short-circuit current limit to continuous current limit. Note 2: Specifications to -4 are guaranteed by design, not production tested. 3

4 Typical Operating haracteristics (ircuit of Figure 2, V IN_ =, IN_ =.1µF, OUT_ = 1µF, ON_ = SEL, T = +25, unless otherwise noted.) QUIESENT SUPPLY URRENT (µ) QUIESENT SUPPLY URRENT vs. INPUT VOLTGE LL SWITHES TIVE INPUT VOLTGE (V) toc1 QUIESENT SUPPLY URRENT (µ) QUIESENT SUPPLY URRENT 7 LL SWITHES TIVE V IN_ = V IN_ = V IN_ = toc2 SHUTOWN SUPPLY URRENT (µ) SHUTOWN SUPPLY URRENT ON_ = GN, V SEL = toc3 SWITH OFF-LEKGE (n) SWITH OFF-LEKGE (ONE SWITH) ON_ = OUT_, V SEL = toc4 NORMLIZE ON-RESISTNE NORMLIZE ON-RESISTNE toc5 ONTINUOUS URRENT-LIMIT THRESHOL (m) ONTINUOUS URRENT-LIMIT THRESHOL V IN_ = 5.V V IN_ = 5. V IN_ = toc6 TURN-ON TIME (ms) TURN-ON TIME (t ON + t RISE ) R OUT_ = 1Ω V IN_ = V IN_ = 4. V IN_ = toc7 TURN-OFF TIME (ms) TURN-OFF TIME (t OFF + t FLL ) R OUT_ = 1Ω V IN_ = V IN_ = 5. V IN_ = toc8 FULT-LNKING TIME (ms) FULT-LNKING TIME V IN_ = 4. V IN_ = V IN_ = toc9 4

5 Typical Operating haracteristics (continued) (ircuit of Figure 2, V IN_ =, IN_ =.1µF, OUT_ = 1µF, ON_ = SEL, T = +25, unless otherwise noted.) FULT OUTPUT LOW VOLTGE (mv) FULT OUTPUT LOW VOLTGE R PU = 4.7kΩ V IN_ = 21 V IN_ = V IN_ = OVERLO RESPONSE INTO 2.5Ω toc13 toc1 UTORESET URRENT (m) UTORESET URRENT V 34 IN_ = V IN_ = V IN_ = OVERLO RESPONSE INTO 2.5Ω (EXPNE TIME SLE) toc14 toc11 UTORESET URRENT (m) UTORESET URRENT vs. INPUT VOLTGE T = -4 T = +25 T = INPUT VOLTGE (V) SHORT-IRUIT RESPONSE INTO Ω toc15 toc12 : V IN_ /div : V OUT_ /div 1ms/div : V FULT_ /div : I OUT_ 1/div SHORT-IRUIT RESPONSE INTO Ω (EXPNE TIME SLE) toc16 : V IN_ /div : V OUT_ /div 4µs/div : V FULT_ /div : I OUT_ 1/div SWITH TURN-ON TIME (t ON + t RISE ) V SEL = R OUT_ = 1Ω OUT_ = 1µF toc17 : V IN_ /div : V OUT_ /div 1ms/div : V FULT_ /div : I OUT_ 1/div SWITH TURN-ON TIME (t ON + t FLL ) V SEL = R OUT_ = 1Ω OUT_ = 1µF toc18 : V IN_ /div : V OUT_ /div 4µs/div : V FULT_ /div : I IN_ 2/div : V ON_ /div : V OUT_ 2V/div 1ms/div : V ON_ /div : V OUT_ 2V/div 1ms/div 5

6 Typical Operating haracteristics (continued) (ircuit of Figure 2, V IN_ =, IN_ =.1µF, OUT_ = 1µF, ON_ = SEL, T = +25, unless otherwise noted.) STRTUP TIME OUT = 1µF V SEL =, R OUT_ = 1Ω, OUT_ = 1µF toc19 STRTUP TIME OUT = 33µF V SEL =, R OUT_ = 1Ω, OUT_ = 33µF toc2 5m 5m : V ON_ /div : V FULT_ /div 4µs/div : V OUT_ /div : I OUT_ 5m/div : V ON_ /div : V FULT_ /div 1ms/div : V OUT_ /div : I OUT_ 5m/div STRTUP TIME OUT = 1µF toc21 UNERVOLTGE LOKOUT RESPONSE toc22 V SEL =, R OUT_ = 1Ω, OUT_ = 1µF R OUT_ = 1Ω, OUT_ = 1µF 5m : V ON_ /div : V FULT_ /div 1ms/div : V OUT_ 2V/div : I OUT_ 5m/div : V IN_ /div : V OUT_ /div 1ms/div : V FULT_ /div 6

7 PIN NME FUNTION 1 ON ontrol Input for Switch. The active polarity of ON is set by SEL (see Table 1). 2 IN1 3 IN2 Pin escription Power Input. onnect all IN_ inputs together and bypass with a.1µf ceramic capacitor to GN. Load conditions might require additional bulk capacitance to prevent pulling IN_ down. Power Input. onnect all IN_ inputs together and bypass with a.1µf ceramic capacitor to GN. Load conditions might require additional bulk capacitance to prevent pulling IN_ down. 4 IN3 Power Input. onnect all IN_ inputs together and bypass with a.1µf ceramic capacitor to GN. Load conditions might require additional bulk capacitance to prevent pulling IN_ down. 5 ON ontrol Input for Switch. The active polarity of ON is set by SEL (see Table 1). 6 IN4 Power Input. onnect all IN_ inputs together and bypass with a.1µf ceramic capacitor to GN. Load conditions might require additional bulk capacitance to prevent pulling IN_ down. 7 IN5 Power Input. onnect all IN_ inputs together and bypass with a.1µf ceramic capacitor to GN. Load conditions might require additional bulk capacitance to prevent pulling IN_ down. 8 ON ontrol Input for Switch. The active polarity of ON is set by SEL (see Table 1). 9 FULT 1 OUT 11 SEL 12 FULT Fault Indicator Output for Switch. Open-drain output asserts low when switch enters thermal shutdown, undervoltage lockout, or a sustained (>2ms) current-limit or short-circuit condition. Power Output for Switch. ypass OUT to GN with a 1µF ceramic capacitor. Load conditions might require additional bulk capacitance. When disabled, OUT goes into a high-impedance state. Logic Input Polarity Select. SEL sets the active polarity of the ON_ inputs. onnect SEL high to set activehigh inputs. onnect SEL to GN to set active-low inputs. Fault Indicator Output for Switch. Open-drain output asserts low when switch enters thermal shutdown, undervoltage lockout, or enters a sustained (>2ms) current-limit or short-circuit condition. 13 OUT Power Output for Switch. ypass OUT to GN with a 1µF ceramic capacitor. Load conditions might require additional bulk capacitance. When disabled, OUT goes into a high-impedance state. 14 GN Ground 15 OUT 16 FULT Power Output for Switch. ypass OUT to GN with a 1µF ceramic capacitor. Load conditions might require additional bulk capacitance. When disabled, OUT goes into a high-impedance state. Fault Indicator Output for Switch. Open-drain output asserts low when switch enters thermal shutdown, undervoltage lockout, or a sustained (>2ms) current-limit or short-circuit condition. 7

8 ON IN1 SEL HRGE PUMP IN2 SWITH (EXPNE) IN_ FULT ILIM OUT THERML SHUTOWN 25m FULT LOGI 2ms TIMERS UVLO OS 25kHz SWITH (SEE SWITH ) OUT FULT IS SWITH (SEE SWITH ) OUT FULT ON ON REF GN IN2 IN3 IN4 IN5 Figure 1. Functional iagram etailed escription The triple current-limited US power switch provides three independent switches, each with its own enable-control input and fault indicator (see Figure 1). logic input sets the active polarity of the enable control inputs. The fault indicators notify the system when the current-limit, short-circuit, undervoltage lockout, or thermal-shutdown threshold is exceeded. The operates from a 4V to 5. input supply and supplies a minimum output current of 7m per channel. built-in current limit of.9 (typ) limits the output current in the event of an overload condition. uilt-in short-circuit detection pulses the output current if the output voltage falls below 1V, resulting in lower RMS output current and reduced power dissipation in the device. Independent thermal shutdown allows normal operation to continue if one channel experiences a prolonged overload or short-circuit condition. Low-R ON NMOS switches enable the to provide three switches in the space-saving 16-pin QSOP package. n internal micropower charge pump generates the high-side supply needed for driving the gates of these high-side switches. Separate current-limiting and thermal-shutdown circuitry permits each switch to operate independently, improving system robustness. 8

9 On/Off ontrol and Undervoltage Lockout SEL sets the active polarity of the logic inputs of the. onnect ON_ to the same voltage as SEL to enable the respective OUT_ switch. onnect ON_ to the opposite voltage as SEL to disable the respective output (see Table 1). The output of a disabled switch enters a high-impedance state. The includes a UVLO circuit to prevent erroneous switch operation when the input voltage goes low during startup and brownout conditions. Input voltages of less than 3.4V inhibit operation of the device. FULT_ asserts low during an undervoltage lockout condition. Output Fault Protection and utoreset The senses the switch output voltage and selects continuous current limiting for V OUT_ greater than 1V, or short-circuit current limiting for V OUT_ less than 1V. When V OUT_ is greater than 1V, the device operates in a continuous current-limit mode that limits output current to.9. When V OUT_ is less than 1V, the device operates in short-circuit current-limit mode, sourcing 1.2 pulses to the load. When either fault condition persists for 2ms, the output turns off and its fault flag is asserted. The output automatically restarts 2ms after the short or overload is removed. The detects short-circuit removal by sourcing 25m from the output and monitoring the output voltage. When the voltage at the output exceeds. for 2ms, the fault flag resets, the output turns back on, and the 25m current source turns off. ctive loads are not expected to have measurable current when supplied with less than.. Thermal Shutdown Independent thermal shutdown for each channel permits normal operation of two switches to continue while a third experiences a thermal fault. The switch turns off and the FULT_ output asserts low immediately when the junction temperature exceeds +16. Thermal shutdown does not utilize the 2ms fault-blanking timeout period. The switch turns on again and FULT_ returns high when the junction temperature cools by +15. The switch cycles on and off if the overload condition persists, resulting in a pulsed output that reduces system power. Table 1. On/Off ontrol SEL ON_ OUT_ EHVIOR GN GN V IN ON OFF GN OFF V IN V IN ON Fault Indicators The provides an independent open-drain fault output (FULT_) for each switch. onnect FULT_ to IN_ through a 1kΩ pullup resistor for most applications. FULT_ asserts low when any of the following conditions occur: The input voltage is below the UVLO threshold. The switch junction temperature exceeds the +16 thermal-shutdown temperature limit. The switch is in current-limit or short-circuit currentlimit mode after the fault-blanking period (2ms) expires. The FULT_ output deasserts after a 2ms delay once the fault condition is removed. Ensure that the input bypass capacitance prevents glitches from triggering the FULT_ outputs. Limit the input voltage slew rate to.2v/µs to prevent erroneous FULT_ indications. To differentiate large capacitive loads from short circuits or sustained overloads, the has an independent fault-blanking circuit for each switch. When a load transient causes the device to enter current limit, an internal counter monitors the duration of the fault. For load faults exceeding the 2ms faultblanking time, the switch turns off, FULT_ asserts low, and the device enters autoreset mode (see the Output Fault Protection and utoreset Mode section). Only current-limit and short-circuit faults are blanked. Thermal overload faults and input voltage drops below the UVLO threshold immediately turn the switch off and assert FULT_ low. Fault blanking allows the to handle US loads that might not be fully compliant with US specifications. The successfully powers US loads with additional bypass capacitance and/or large startup currents while protecting the upstream power source. No fault is reported if the switch brings up the load within the 2ms blanking period. See Table 2 for a summary of current-limit and fault behavior. 9

10 Table 2. urrent-limiting and Fault ehavior ONITION Output Short ircuit (V OUT_ < 1V) Output Overload urrent (V OUT_ > 1V) Thermal Fault (T J > +16 ) EHVIOR If a short is detected at the output, the channel turns off, and the blanking timer begins. FULT_ remains high during the blanking timeout period. If the short persists during the fault-blanking period, the output pulses at.35 RMS. If the short is removed before the 18ms short-circuit blanking timeout period, the next ramped current pulse soft-starts the output. FULT_ remains high. If the short circuit persists after the fault-blanking period, FULT_ goes low, autoreset mode begins, and the output sources 25m. If the output voltage rises above. for 2ms, the output turns on and FULT_ goes high (see Short- ircuit Response in the Typical Operating haracteristics.) Output current regulates at I LIM and the blanking timer turns on. FULT_ remains high during the blanking timeout period. ontinuous current at I LIM persists until either the 2ms blanking period expires or a thermal fault occurs. If overcurrent persists after 2ms, FULT_ goes low, autoreset mode is enabled, and the output sources 25m. If the output voltage rises above. for 2ms, the output turns on and FULT_ goes high (see Overload Response into 2.5Ω in the Typical Operating haracteristics.) junction temperature of +16 immediately asserts FULT_ low (the blanking timeout period does not apply for thermal faults) and turns off the switch. When the junction cools by 15, the thermal fault is cleared and FULT_ goes high. Note that if other fault conditions are present when a thermal fault clears, those fault states take effect. pplications Information Input Power Supply and apacitance onnect all IN_ inputs together externally. IN_ powers the internal control circuitry and charge pump for each switch. ypass IN_ to GN with a.1µf ceramic capacitor. When driving inductive loads or operating from inductive sources, which may occur when the is powered by long leads or P traces, larger input bypass capacitance is required to prevent voltage spikes from exceeding the s absolute maximum ratings during short-circuit events. Output apacitor ypass OUT_ to GN with a 1µF ceramic capacitor for local decoupling. dditional bulk capacitance (up to 47µF) reduces output-voltage transients under dynamic load conditions. Using output capacitors greater than 47µF might assert FULT_ if the current limit cannot charge the output capacitor within the 2ms fault-blanking period. In addition to bulk capacitance, small-value (.1µF or greater) ceramic capacitors improve the output s resilience to electrostatic discharge (ES). riving Inductive Loads wide variety of devices (mice, keyboards, cameras, and printers) typically connect to the US port with cables, which might add an inductive component to the load. This inductance causes the output voltage at the US port to oscillate during a load step. The drives inductive loads, but avoid exceeding the device s absolute maximum ratings. Usually, the load inductance is relatively small, and the s input includes a substantial bulk capacitance from an upstream regulator as well as local bypass capacitors, limiting overshoot. If severe ringing occurs because of large load inductance, clamp the outputs below +6V and above -.3V. Turn-On and Turn-Off ehavior The s slow turn-on and turn-off minimizes load transients on the upstream power source. Under fault conditions, the outputs of the turn off rapidly to provide maximum safety for the upstream power source and downstream devices. Internal blocks shut down to minimize supply current when all three channels are off. Layout and Thermal issipation Keep all traces as short as possible to reduce the effect of undesirable parasitic inductance and optimize the switch response time to output short-circuit conditions. Place input and output capacitors no more than 5mm from device leads. onnect IN_ and OUT_ to the 1

11 INPUT 4V TO 5. O.1µF ON OFF IN1 IN2 IN3 IN4 IN5 ON ON ON SEL GN FULT FULT FULT OUT OUT OUT *US PPLITIONS MY REQUIRE ITIONL ULK PITNE Figure 2. Typical pplication ircuit 1kΩ US PORT 1µF* US PORT 1µF* US PORT 1µF* 1kΩ 1kΩ power bus with short traces. Wide power bus planes at IN_ and OUT provide superior heat dissipation as well. n active switch dissipates little power with minimal change in package temperature. alculate the power dissipation for this condition as follows: P = (I OUT_ ) 2 x R ON t the normal operating current (I OUT_ =.5) and the maximum on-resistance of the switch (135mΩ), the power dissipation is: P = (.5) 2 x.135ω = 34mW per switch. The worst-case power dissipation occurs when the output current is just below the current-limit threshold (1.2 max) with an output voltage greater than 1V. In this case, the power dissipated in each switch is the voltage drop across the switch multiplied by the current limit: P = I LIM x (V IN - V OUT ) For a input and 1V output, the maximum power dissipation per switch is: P = 1.2 x ( - 1V) = 4.8W ecause the package power dissipation is 667mW, the die temperature exceeds the +16 thermal shutdown threshold, and the switch output shuts down until the junction temperature cools by +15. The duty cycle and period are strong functions of the ambient temperature and the P board layout (see the Thermal Shutdown section). If the output current exceeds the current-limit threshold, or the output voltage is pulled below the short-circuit detect threshold, the enters a fault state after 2ms, at which point autoreset mode is enabled and 25m is sourced by the output. For a input, OUT_ short-circuited to GN, and autoreset mode active, the power dissipation is as follows: P =.25 x =.125W 11

12 PROESS: imos hip Information Package Information For the latest package outline information and land patterns, go to Note that a +, #, or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PKGE TYPE PKGE OE OUMENT NO. 16 QSOP E

13 REVISION NUMER REVISION TE ESRIPTION Revision History PGES HNGE 7/2 Initial release 1 2/1 Removed UL ertification Pending bullet from Features section 1 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 12 San Gabriel rive, Sunnyvale, Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.