PT7M mA, High PSRR, LDO Regulator Description. Features. Applications. Pin Assignment. Pin Description Pin No I/O Pin Name Description 1 I VIN

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1 Features Input Voltage Range:.7V to 5.5V 3mA Guaranteed Output Current Stable with.47f Ceramic Output Capacitors Low Dropout Voltage (Vout=2.8V) Low Quiescent Current 36A High PSRR Auto Output Discharge High Output Accuracy ±2% Initial Accuracy Thermal Shutdown and Current Limit Protection Operating Temperature Range: -4 C to +85 C Package: SC7-5L and SOT23-5L Applications Cell Phones Mobile Phones (PDC, GSM, CDMA, IMT2 etc.) Cordless Phones and Radio Communication Digital Still Cameras and Video Cameras PDA MP3 Players Portable Devices Pin Assignment Description PT7M828 is a high accurate, low dropout voltage regulator with low noise, high ripple rejection and low current consumption. PT7M828 includes a reference voltage source, an error amplifier, a driver transistor, a current limit protection, a thermal protection and an internal phase compensator. The output voltage for the regulator is set by factory trimming within a range of.9v to 3.3V in mv step includes 2.85V. PT7M828 is stable with low ESR ceramic capacitors. PT7M828 is available in SC7-5L and SOT23-5L packages. It operates over a temperature range of -4 to +85 C. VIN GND EN SC7-5L /SOT23-5L VOUT NC Pin Description Pin No I/O Pin Name Description I VIN Regulator Supply Input. Supply voltage can range from.7v to 5.5V. Bypass with a.47f ceramic capacitor (X5R/X7R) to GND. 2 P GND Ground. 3 I EN ON/OFF Control of Regulator. High active. 4 - NC This pin is better to be connected to the GND, but leaving it open is also acceptable 5 O VOUT Output of Regulator. Bypass with a.47f ceramic capacitor (X5R/X7R) to GND.

2 Maximum Ratings Storage Temperature o C to +25 o C Ambient Temperature with Power Applied o C to 85 o C Input Voltage V Output Voltage. -.3 to V CC +.3V EN pin Voltage V DC Input/Output Current...7mA Power Dissipation. SC7/3mW SOT23/4mW Recommended Operating Conditions Symbol Parameter Conditions Min. Typ. Max. Unit V IN Operating Voltage V V EN Control Input Voltage V T A Operating Temperature C DC Electrical Characteristics (T A =25 C, V IN = V OUT + V for V OUT options greater than.5v. V IN = 2.5V for V OUT.5V, unless otherwise noted.) Parameter Symbol Conditions Min. Typ. Max. Unit V Output Voltage V OUT(E) * V IN =V OUT(S) * +.V, I OUT =3mA OUT(S) * V V OUT(S) *.98 OUT(S).2 V Input Voltage V IN V Maximum Output Current I OUTMAX V IN =V OUT(S) +.V ma Dropout Voltage V DIF * I OUT = 5mA 2.8V V OUT(S) V OUT(S) 2.7V mv Supply Current I SS V IN = V OUT(S) +.V, no load µa Standby Current I STB V IN = V OUT(S) +.V, EN=GND -.5 A Line Regulation ΔV OUT / ΔV IN *V OUT V OUT(S) +.V V IN 5.5V, I OUT =3mA %/V Load Regulation Output Voltage Temperature Characteristic Ripple Rejection ΔV OUT2 ΔV OUT / ΔTopr*V OUT PSRR V IN = V OUT(S) +.V,.mA I OUT 5mA - mv I OUT =3mA, -4 Topr /- - ppm/ V IN =[V OUT(S) +.]V DC +.2Vp-p AC I OUT =3mA, f=khz (In case that Vout 2.V, V IN =3.V) db Current Limit I LIM V OUT = V OUT(S) * ma Short Current Limit I SC Vout=V ma Thermal Shutdown TSD Thermal Shutdown Hysteresis EN High Voltage EN Low Voltage Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. ΔTSD V ENH V ENL EN High Current I ENH V IN =V OUT(S) +.V EN Low Current I ENL V IN = V OUT(S) +.V, EN=OFF µa Output Discharge Resistance Rdis V IN = 4.V, EN=OFF Ω Output Voltage Noise V N C OUT =.47µF, Hz to khz µvrms Note: *: V OUT(S)=Specified output voltage *2: V OUT(E)=Effective output voltage (I.e. the output voltage when "V OUT(S)+.V" is provided at the VIN pin while maintaining a certain I OUT value). *3: V DIF={V IN(*5) -V OUT(*4)} 2 V

3 *4: V OUT=A voltage equal to 98% of the output voltage whenever an amply stabilized IOUT {V OUT(S)+.V} is input. *5: V IN=The input voltage when VOUT appears as input voltage is gradually decreased. *6: Unless otherwise stated, V IN=V OUT(S) +.V Application Circuits Power Input VIN VO UT LDO OUTPUT ON/OFF Input C i n EN GND C ou t S in gle GND Note: Cin and Cout are.47f low ESR ceramic capacitors 3

4 Block Diagram Over-current Protection Circuit VOUT EN ON/OFF C ircuit VIN GND R ef erence Voltage C ircuit Functional Description (Refer to Block Diagram) Output Voltage The divided output voltage is compared with the internal reference voltage by the error amplifier with internal phase compensator. The output of the error amplifier then drives the P-channel MOSFET to maintain a stable and constant output voltage. Low ESR Capacitors The internal phase compensator maintains the stable output voltage with low ESR ceramic input and output capacitors..47f low ESR (X5R/X7R) ceramic capacitor located as close as possible to the IC s pins is recommended. Current Limit and Thermal Shutdown Protections Current limit protection is used to limit the output current when an overload condition occurs. As a result, the output voltage will drop. Thermal shutdown protection will turn off the output to reduce the power dissipation when the operation junction temperature exceeds 7 C. EN Pin The output of the regulator in PT7M828 can be controlled with EN pin. The EN pin should be connected to a VIN or a GND voltage as a floating input applied to inverter input of the enable circuitry will increase the current consumption. NOTE ON USE Please use this IC within the stated absolute maximum ratings. Where wiring impedance is high, operations may become unstable due to noise and/or phase lag depending on output current. Please keep the resistance low between VIN and GND wiring in particular. Please wire the input capacitor (Cin) and the output capacitor (Cout) as close to the IC as possible. 4

5 Vout (V) Vout (V) Vout (V) Vout (V) PT7M828 Typical Performance Characteristics. Output Voltage vs. Output Current (Vout=.V) Vin=4.3V.8 Vin=2.5V Vin=3.5V 2.5 Vin=5.V Vin=5.5V Vin=5.5V Iout (ma) Iout (ma) 2. Output Voltage vs. Input Voltage (Vout=.V) ma 3mA 5mA ma 3mA 5mA Vin (V) Vin (V) 5

6 Vout (V) Vout (V) Iss (µa) Iss (µa) PT7M Supply Current vs. Input Voltage (Vout=.V) Vin=2.5V Vin (V) Vin=4.3V Vin (V) 4. Output Voltage vs. Ambient Temperature (Vout=.V) Vin=2.5V, I OUT =3mA Vin=4.3V, I OUT =3mA Temperature ( C) Temperature ( C) 6

7 Iss (µa) Iss (µa) PT7M Supply Current vs. Ambient Temperature (Vout=.V) Vin=2.5V Vin=4.3V Temperature ( C) Temperature ( C) 6. Line Transient Response 7. Load Transient Response Time (5µs/div) Time (4µs/div) Vin=5.3V Vin=4.3V Vin: V/div Vout: 5mV/div Vout: 2mV/div Iout=mA Iout=5mA Iout: 5mA/div 7

8 PSRR (db) PT7M Turn On Speed with EN pin 9. Turn Off Speed with EN pin Time (2µs/div) Time (2µs/div) EN Voltage EN Voltage Vout Voltage Vout Voltage. PSRR (Vout=.9V) Vin=3.V DC+.2Vp-pAC Cout=.47uF(Ceramics), Iout=3mA Frequenct (khz) 8

9 Mechanical Information SC7-5L Note: ) Controlling dimensions in millimeters. 2) Ref: JEDEC MO-23B/AA PKG. DIMENSIONS(MM) SYMBOL MIN MAX A.9. A.. A2.9. b.5.35 c.8.5 D E.5.35 E e.65typ e.2.4 L θ 8 9

10 SOT23-5L Note: ) Controlling dimensions in millimeters. 2) Ref: JEDEC MO-78C/AA PKG. DIMENSIONS(MM) SYMBOL MIN MAX A.5.25 A.. A2.5.5 b.3.5 c..2 D E.5.7 E e.95bsc e.8 2. L.3.6 θ 8

11 Ordering Information Part Number Package Code Package Top Marking PT7M828B2TAE TA Lead Free and Green SOT23-5L See below Table Notes: PT7M828B2CE C Lead Free and Green SC7-5L See below Table E = Pb-free and Green Adding X Suffix= Tape/Reel B of PT7M828B2 means high active for control pin EN 2 refer to different output voltage. See below Table Contact Pericom for availability. Table Sequential Number Description Designator Top Marking Designator Top Marking VOUT (V) VOUT (V) j k m n p q A Pericom Semiconductor Corporation Pericom reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. Pericom does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom product. The company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom.