FEATURES. - Low Output Noise: 30µVRMS typ(10hz to 100KHz) - Ultra-Low Dropout Voltage:

Size: px

Start display at page:

Download "FEATURES. - Low Output Noise: 30µVRMS typ(10hz to 100KHz) - Ultra-Low Dropout Voltage:"

Eleanore Hicks
5 years ago
Views:

1 Low Power, Low Dropout, 15mA, RF - Linear Regulators GENERAL DESCRIPTION The series low-power, low-noise, low-dropout, CMOS linear voltage regulators operate from a 2.5V to 5.5V input and deliver up to 15mA. They are the perfect choice for low voltage, low power applications. An ultra low ground current ( 15µA at 15mA output ) makes these part attractive for battery operated power systems. The series also offer ultra low dropout voltage (15mV at 15mA output) to prolong battery life in portable electronics. Systems requiring a quiet voltage source, such as RF applications, will benefit from the series ultra low output noise (3µVRMS) and high PSRR. An external noise bypass capacitor connected to the device s BP pin can further reduce the noise level. The output voltage is preset to voltages in the range of 1.5V to 5.V. Other features include a 1nA logic-controlled shutdown mode, foldback current limit and thermal shutdown protection. FEATURES - Low Output Noise: 3µVRMS typ(1hz to KHz) - Ultra-Low Dropout Voltage: 15mV at 15mA output - Low 77µA No-Load Supply Current - Low 15µA Operating Supply Current at 15mA Output - High PSRR: 73dB at 1KHz - Thermal-Overload Protection - Output Current Limit - Preset Output Voltages (±2.7% Accuracy) - 1nA Logic-Controlled Shutdown - Available in Multiple Output Voltage Versions Fixed Outputs of 1.8V, 2.5V, 2.7V, 2.8V, 2.85V, 2.9V, 3.V, 3.3Vand 3.6V Adjustable Output from 1.5V to 5.V Devices come in 5-pin SOT23 package. PIN CONFIGURATIONS(TOP VIEW) APPLICATIONS Cellular Telephones Cordless Telephones PHS Telephones PCMCIA Cards Modems MP3 Player Hand-Held Instruments Palmtop Computers Electronic Planners Portable/Battery-Powered Equipment IN GND EN OUT BP/FB SOT23-5 Shengbang Microelectronics Co, Ltd Tel: 86/451/ REV. C

2 ORDERING INFORMATION MODEL VOUT(V) PIN- PACKAGE SPECIFIED TEMPERATURE RANGE ORDERING NUMBER PACKAGE MARKING PACKAGE OPTION SGM V SOT C to +125 C SGM26-1.8XN5/TR X618 Tape and Reel, 3 SGM V SOT C to +125 C SGM26-2.5XN5/TR X625 Tape and Reel, 3 SGM V SOT C to +125 C SGM XN5/TR X627 Tape and Reel, 3 SGM V SOT C to +125 C SGM26-2.8XN5/TR X628 Tape and Reel, 3 SGM V SOT C to +125 C SGM XN5/TR X62J Tape and Reel, 3 SGM V SOT C to +125 C SGM26-2.9XN5/TR X629 Tape and Reel, 3 SGM V SOT C to +125 C SGM26-3.XN5/TR X63 Tape and Reel, 3 SGM V SOT C to +125 C SGM26-3.3XN5/TR X633 Tape and Reel, 3 SGM V SOT C to +125 C SGM26-3.6XN5/TR X636 Tape and Reel, 3 SGM26A adjustable SOT C to +125 C SGM26-XN5/TR X6AA Tape and Reel, 3 ABSOLUTE MAXIMUM RATINGS IN to GND...-.3V to +6V Output Short-Circuit Duration...Infinite EN to GND...-.3V to +6V OUT, BP/FB to GND...-.3V to (VIN +.3V) Power Dissipation, TA = 25 SOT W Package Thermal Resistance SOT23-5, θja /W Operating Temperature Range...- C to +125 C Junction Temperature C Storage Temperature C to +15 C Lead Temperature (soldering, 1s)...26 C ESD Susceptibility HBM...V MM...V Stresses beyond those listed under Absolute 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. PIN DESCRIPTION PIN NAME FUNCTION 1 IN Regulator Input. Supply voltage can range from 2.5V to 5.5V. Bypass with a 1µF capacitor to GND. 2 GND Ground. 3 EN Shutdown Input. A logic low reduces the supply current to 1nA. Connect to IN for normal operation. 4 BP Reference-Noise Bypass(fixed voltage version only). Bypass with a low-leakage.1µf ceramic capacitor for reduced noise at the output. 4 FB Adjustable voltage version only this is used to set the output voltage of the device. 5 OUT Regulator Output. 2

3 ELECTRICAL CHARACTERISTICS (V IN = V OUT (NOMINAL) +.5V (1), T A = - C to +125 C, unless otherwise noted. Typical values are at T A = + 25 C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage VIN V Output Voltage Accuracy (1) IOUT =1mA to15ma, TA = +25 C VOUT +.5V VIN 5.5V % Maximum Output Current 15 ma Current Limit ILIM 6 ma Ground Pin Current Dropout Voltage (2) Line Regulation (1) IQ ΔVLNR No load, EN = 2V IOUT = 15mA, EN = 2V 15 IOUT = 1mA 1 IOUT = 15mA VIN = 2.5V or (VOUT +.5V) to 5.5V, IOUT = 1mA µa mv.3.15 %/V Load Regulation ΔVLDR IOUT =.1mA to 15mA, COUT = 1µF.8.2 %/ma Output Voltage Noise Power Supply Rejection Rate SHUTDOWN EN Input Threshold en PSRR f = 1Hz to KHz, CBP =.1µF, COUT = 1µF 3 µvrms CBP =.1µF, ILOAD = 5mA, f = Hz, 78 db COUT = 1µF f = 1KHz, 73 db VIH 2. VIL VIN = 2.5V to 5.5V EN Input Bias Current IB(SHDN) EN = V and EN = 5.5V Shutdown Supply Current IQ(SHDN) EN =.4V Shutdown Exit Delay (3) THERMAL PROTECTION CBP =.1µF COUT = 1µF, No load.4 TA = +25 C.1 1 TA = +125 C.1 TA = +25 C.1 1 TA = +125 C.1 V µa µa TA = +25 C 3 µs Thermal Shutdown Temperature TSHDN Thermal Shutdown Hysteresis ΔTSHDN 15 Specifications subject to change without notice. Note 1: VIN = VOUT(NOMINAL) +.5V or 2.5V, whichever is greater. Note 2: The dropout voltage is defined as VIN - VOUT, when VOUT is mv below the value of VOUT for VIN = VOUT +.5V. (Only applicable for VOUT = +2.5V to +5.V.) Note 3: Time needed for VOUT to reach 95% of final value. 3

4 TYPICAL OPERATION CIRCUIT INPUT 2.5V TO 5.5V IN OUT OUTPUT INPUT 2.5V TO 5.5V IN OUT OUTPUT ON C IN 1μF OFF EN SGM 26A GND FB R 1 R 2 C OUT 1μF ON C IN 1μF OFF EN SGM 26 GND BP C OUT 1μF C BP.1μF Adjustable Voltage Version Fixed Voltage Version Standard 1% Resistor Values for Common Output Voltages of Adjustable Voltage Version V OUT (V) R 1 (kω) R 2 (kω) Note: VOUT = (R 1 + R 2 )/ R

5 TYPICAL OPERATING CHARACTERISTICS V IN = V OUT(NOMINAL) +.5V or 2.5V (whichever is greater), C IN = 1µF, C OUT = 1µF, C BP =.1µF, T A = +25, unless otherwise noted. 2.9 Output Voltage vs.load Current 3.4 Output Voltage vs.load Current Output Voltage(V) Output Voltage(V) Ground Pin Current(µA) Ground Pin Current vs.load Current Ground Pin Current(µA) 2 Ground Pin Current vs.input Voltage I load = 5mA No Load Input Voltage(V) Ground Pin Current(µA) 2 Ground Pin Current vs.input Voltage I load = 5mA No Load Output Voltage(V) Output Voltage vs.input Voltage No Load Input Voltage(V) Input Voltage(V) 5

6 TYPICAL OPERATING CHARACTERISTICS V IN = V OUT(NOMINAL) +.5V or 2.5V (whichever is greater), C IN = 1µF, C OUT = 1µF, C BP =.1µF, T A = +25, unless otherwise noted. 2.9 Output Voltage vs.temperature I LOAD = 15mA 3.4 Output Voltage vs.temperature I LOAD = 15mA Output Voltage(V) Output Voltage(V) Temperature( ) Temperature( ) Ground Pin Current(μA) Ground Pin Current vs.temperature I LOAD = 15mA Temperature( ) Dropout Voltage(mV) Dropout Voltage vs.load Current T A = - T A = +125 T A = +85 T A = Dropout Voltage vs.load Current Current limit vs.temperature Dropout Voltage(mV) T A = - T A = +85 T A = +25 T A = +125 Current limit(ma) Temperature( ) 6

7 TYPICAL OPERATING CHARACTERISTICS V IN = V OUT(NOMINAL) +.5V or 2.5V (whichever is greater), C IN = 1µF, C OUT = 1µF, C BP =.1µF, T A = +25, unless otherwise noted. 7

8 TYPICAL OPERATING CHARACTERISTICS V IN = V OUT(NOMINAL) +.5V or 2.5V (whichever is greater), C IN = 1µF, C OUT = 1µF, C BP =.1µF, T A = +25, unless otherwise noted. PSRR(dB) Power-Supply Rejection Ratio vs.frequency C OUT = 1μF C BP =.1μF I LOAD = 5mA V IN = V OUT +1V C OUT = 1μF Frequency(kHz) Output Noise Spectral Density (μv/ Hz) Output Noise Spectral Density vs.frequency C OUT = 1μF C BP =.1μF I LOAD = 5mA C OUT = 1μF Frequency(kHz) Output Noise vs.load Current Output Noise(µVRMS) f = 1Hz to khz C BP =.1μF C OUT = 1μF 1 1 8

9 Application Notes When LDO is used in handheld products, Attention must be paid to voltage spike which would damage SGM26. In such applications, voltage spike will be generated at changer interface and V BUS pin of USB interface when changer adapters and USB equipments are hot-inserted. Besides this, handheld products will be tested on the production line on the condition of no battery. Test Engineer will apply power from the connector pin which connects with positive pole of the battery. When external power supply is turned on suddenly, the voltage spike will be generated at the battery connector. The voltage spike will be very high, it always exceeds the absolute maximum input voltage (6.V) of LDO. In order to get robust design. Design Engineer needs to clear up this voltage spike. Zener diode is a cheap and effective solution to eliminate such voltage spike. For example, BZM55B5V6 is a 5.6V small package Zener diode which can be used to remove voltage spike in cell phone design. The schematic is shown in below: Vcc Input BZM55B5V6 1uF C 1 1 IN SGM26 V OUT 5 C 2 4.7uF V OUT EN GND BP/FP uF Control 9

10 PACKAGE OUTLINE DIMENSIONS SOT23-5 D b L θ.2 Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A A E1 E A b c e1 e A1 L C D E E e.95typ.37typ e A2 A L.7REF.28REF L θ 8 8 1

11 REVISION HISTORY Location Page 12/6 Data Sheet changed from REV. A to REV. B Changed to ABSOLUTE MAXIMUM RATINGS Added Application Notes /7 Data Sheet changed from REV. B to REV. C Changed to TYPICAL OPERATING CHARACTERISTICS Shengbang Microelectronics Co, Ltd Unit 3, ChuangYe Plaza No.5, TaiHu Northern Street, YingBin Road Centralized Industrial Park Harbin Development Zone Harbin, HeiLongJiang 1578 P.R. China Tel.: Fax:

FEATURES. - Ultra-Low Dropout Voltage: - Low 80µA No-Load Supply Current - Low 110µA Operating Supply Current

FEATURES. - Ultra-Low Dropout Voltage: - Low 80µA No-Load Supply Current - Low 110µA Operating Supply Current 3mA, Low Power, Low Dropout, Linear Regulators GENERAL DESCRIPTION The low-power, low-dropout, CMOS linear voltage regulators operate from a 2.5V to 5.5V input and deliver up to 3mA. They are perfect choice