LB1138BL-50-AB5-R

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UNISONIC TECHNOLOGIES CO., LTD L1138B CMOS IC www.unisonic.com.tw 1 of 7 Copyright © 2017 Unisonic Technologies Co., Ltd QW-R502-323.K HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR WITH HIGH RIPPLE-REJECTION AND LOW DROPOUT  DESCRIPTION The UTC L1138B is a positive LDO voltage regulator using CMOS technology. It is featured as: low dropout voltage, high output voltage accuracy, and low current consumption. The internal circuits include a low on-resistance transistor to provide a low dropout voltage and large output current; an overcurrent protector to make sure the load current don’t exceed the current capacitance of the output transistor, a thermal s hutdown circuit to escape device damage from over-heat, and an ON/OFF circuit to keep the battery life longer. In applications, the UTC L1138B can be used in power supply unit for DVD, CD-ROM drives, battery-powered devices, personal communication devices, and NBs. SOP-8 SOT-89-5 SOT-25  FEATURES * Output voltage‘s high accuracy: ±1.0% * Low dropout voltage: 120mV typ. @3.3V output , IOUT=300mA * Low current consumption: 80μA(Typ.)160μA max in operation 0.1 μA(Typ.)1.0μA max in shutdown mode * High current capability: 800mA output @VIN≥VOUT(S)+1.0V * With ON/OFF circuit: Ensu res long battery life. * High ripple rejection 70dB typ @1.0kHz * With over current protector * With thermal shutdown circuit  ORDERING INFORMATION Ordering Number Lead Free Halogen Free Package Packing L1138BG-xx-AB5-R L1138BG-xx-AB5-R SOT-89-5 Tape Reel L1138BG-xx-AF5-R L1138BG-xx-AF5-R SOT-25 Tape Reel L1138BG-xx-S08-R L1138BG-xx-S08-R SOP-8 Tape Reel xx: Output Voltage, refer to Marking Information.

UNISONIC TECHNOLOGIES CO., LTD 2 of 7 www.unisonic.com.tw Q W - R 5 0 2 - 3 2 3 . K  MARKING INFORMATION PACKAGE VOLTAGE CODE MARKING SOT-89-5 SOT-25 SOP-8 12: 1.2V 25: 2.5V 28: 2.8V 33: 3.3V 35: 3.5V 36: 3.6V 45: 4.5V 50: 5.0V  PIN CONFIGURATION  PIN DESCRIPTION FOR /SOT-89-5 Package PIN NO. SOT-25 SOT-89-5 PIN NAME DESCRIPTION 1 4 V IN Input voltage Pin 2 2 GND Ground Pin 3 1 ON/OFF Shutdown Pin 4 3 NC No Connection, NC pin is electrically open and can be connected VIN and GND 5 5 V OUT Output voltage Pin PIN NO. PIN NAME DESCRIPTION 1,2,3 V OUT Output voltage Pin (Note 1)

4 GND Ground Pin

5 ON/OFF Shutdown Pin

6,7,8 V IN Input voltage Pin (Note 2) Notes: 1. Short pins 1, 2, 3 2. Short pins 6, 7, 8

UNISONIC TECHNOLOGIES CO., LTD 3 of 7 www.unisonic.com.tw Q W - R 5 0 2 - 3 2 3 . K  BLOCK DIAGRAM ON/OFF ON/OFF Circuit Reference Voltage Circuit Overcurrent Protector Thermal Shutdown GND VOUT VIN Parasitic diode

UNISONIC TECHNOLOGIES CO., LTD 4 of 7 www.unisonic.com.tw Q W - R 5 0 2 - 3 2 3 . K  ABSOLUTE MAXIMUM RATING (TA = 25°C, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT VIN 7 V Input Voltage VON/OFF V IN+0.3 V Output Voltage V OUT V IN+0.3 V Power Dissipation P D Internally limited mW Operating Temperature T OPR -40~+85 °C Storage Temperature T STG -40~+125 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.  ELECTRICAL CHARACTERISTICS (TA= 25°C, VIN=VOUT+1V, unless otherwise specified) Parameter SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Input Voltage V IN 6.5 V Output Voltage (Note 1) V OUT(E) V IN =VOUT(S)+1.0V, IOUT =100mA -1% +1% V Line Regulation OUTIN OUT1 V×∆V ∆V VOUT(S) + 0.5V ≤VIN ≤6.5V, IOUT = 100mA 0.05 0.3 %/V Load Regulation ∆VOUT2 VIN = VOUT(S) + 1.0 V, 1.0mA ≤IOUT ≤300mA 30 100 mV Output Current (Note 2) I OUT VIN ≤VOUT(S)+1.0 V 800 mA Operation I SS1 VIN = VOUT(S) +1.0 V, ON/OFF pin = ON, no load 80 160 µACurrent Consumption During Shutdown I SS2 VIN = VOUT(S) + 1.0 V, ON/OFF pin = OFF, no load 0.1 1.0 µA Short-Circuit Current I SHORT VIN = VOUT(S) + 1.0 V, ON/OFF pin = ON, VOUT = 0 V 350 mA VOUT(S) =1.2V 0.8 1.0 VOUT(S) =2.5V 0.15 0.22 VOUT(S) =2.8V 0.15 0.22Dropout Voltage (Note 3) V D I OUT = 300mA V Temperature Coefficient of Output Voltage TCVO VIN = VOUT(S) +1.0V, IOUT = 10mA, -40°C≤ TA ≤85°C ±150 ppm/°C 1.2V ≤VOUT(S)≤ 3.0V 70 Power Supply Rejection PSRR VIN= VOUT(S)+1.0 V f = 1.0kHz, I OUT = 100 mA ∆Vrip = 0.5Vrms 3.1V ≤VOUT(S)≤ 5.5V 65 dB High V SH V IN = VOUT(S) +1.0V 1.5 V Shutdown Pin Input Voltage Low V SL V IN = VOUT(S) + 1.0V 0.3 V High I SH V IN = 6.5V, VON/OFF = 6.5V -0.1 0.1 µAShutdown Pin Input Current Low I SL V IN = 6.5V, VON/OFF = 0V -0.1 0.1 µA Detection T SD Junction temperature 150 °C Thermal Shutdown Temperature Release T SR Junction temperature 120 °C Notes: 1. VOUT(S): Specified output voltage. VOUT(E): Actual output voltage at the fixed load 2. When fixing( IOUT= 100mA) and inputting VOUT(S) + 1.0 V 3. This output current means the one at which the output voltage becomes 98% of V OUT(E) after gradually increasing the output current. 4. The dropant voltage is detmed as VIN - VOUT, which is measured when VOUT is VOUT(normal) × 98%

UNISONIC TECHNOLOGIES CO., LTD 5 of 7 www.unisonic.com.tw Q W - R 5 0 2 - 3 2 3 . K  OPERATION 1. Basic operation The reference voltage (VREF) and VFB(the output voltage resistance-divided by feedback resistors R S and RF) are the input for the error amplifier. 2. Output transistor A low on-resistance P-channel MOSFET is used as the output transistor. Inverse current flowing from VOUT pin through a parasitic diode to VIN pin can damage the regulator, so be sure that VOUT does not exceed VIN + 0.3V. 3. Shutdown pin (ON/OFF pin) The shutdown pin can start and stop the regulator.The shutdown mode set by this pin can stop the operation of all internal circuits. The structure of the ON/OFF pin is shown in Fig. When the ON/OFF pin is not used, connect it to the VIN pin. ON/OFF Pin Internal Circuits V OUT Pin Voltage Current Consumption “L”: Power off Stopped GND level I SS2 “H”: Power on Operating Set value I SS1

UNISONIC TECHNOLOGIES CO., LTD 6 of 7 www.unisonic.com.tw Q W - R 5 0 2 - 3 2 3 . K  TEST CIRCUITS 1. Output Voltage Test 2. Current Consumption Test 3. Output Current Test 4. Shutdown Pin Input Voltage / Current Test 5. Power Supply Rejection Test

UNISONIC TECHNOLOGIES CO., LTD 7 of 7 www.unisonic.com.tw Q W - R 5 0 2 - 3 2 3 . K  TYPICAL APPLICATION CIRCUIT UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.