UNISONIC TECHNOLOGIES CO., LTD L1138
Preliminary CMOS IC
HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR WITH HIGH RIPPLE-REJECTION AND LOW DROPOUT
DESCRIPTION
The UTC L1138 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 shutdown circuit to escape device damage from over-heat, and an ON/OFF circuit to keep the battery life longer. In applications, the UTC L1138 can be used in power supply unit for DVD, CD-ROM drives, battery-powered devices, personal communication devices, and NBs.
1
SOP-8
SOT-89-5
FEATURES
* Output voltage‘s high accuracy: ±1.0% * Low dropout voltage: 120mV typ. @3.0V output , IOUT=300mA * Low current consumption: 80μA(Typ.)160μA max in operation 0.1μA(Typ.)1.0μA max in shutdown mode * High current capability: 800mA output @VIN≥VOUT(S)+1.0V * With ON/OFF circuit: Ensures long battery life. * Low ESR capacitor can be used: at least a 4.7μF ceramic capacitor for the output capacitor. * High ripple rejection 70dB typ@1.0kHz * With over current protector * With thermal shutdown circuit
ORDERING INFORMATION
Ordering Number Lead Free Halogen Free L1138L-xx-AB5-R L1138G-xx-AB5-R L1138L-xx-S08-R L1138G-xx-S08-R xx: Output Voltage, refer to Marking Information. Package SOT-89-5 SOP-8 Packing Tape Reel Tape Reel
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MARKING INFORMATION
PACKAGE VOLTAGE CODE
Preliminary
CMOS IC
MARKING
SOT-89-5 12 :1.2V 25 :2.5V 28 :2.8V 35 :3.5V SOP-8 Voltage Code UTC L1138 Date Code G: Halogen Free L : Lead Free Lot Code
PIN CONFIGURATION
PIN DESCRIPTION
FOR SOT-89-5 Package PIN NO. PIN NAME 1 ON/OFF 2 GND 3 NC 4 VIN 5 VOUT FOR SOP-8 Package PIN NO. PIN NAME 1,2,3 VOUT 4 GND 5 ON/OFF 6,7,8 Note: VIN DESCRIPTION Shutdown Pin Ground Pin No Connection, NC pin is electrically open and can be connected VIN and VSS Input voltage Pin Output voltage Pin
DESCRIPTION Output voltage Pin (Note 1) Ground Pin Shutdown Pin Input voltage Pin (Note 2)
1.Short pins 1, 2 ,3 2.Short pins 6, 7, 8
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BLOCK DIAGRAM
VIN
Preliminary
CMOS IC
Overcurrent Protector Thermal Shutdown
Reference Voltage Circuit ON/OFF Circuit
+
Parasitic diode VOUT
ON/OFF
VSS
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PARAMETER
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING(Ta = 25°C, unless otherwise specified)
SYMBOL RATINGS UNIT VIN VSS -0.3~VSS+7 V Input Voltage VSS -0.3~VIN+0.3 V VON/OFF Output Voltage VOUT VSS -0.3~VIN+0.3 V Power Dissipation PD Internally limited mW Operating Temperature TOPR -40~+85 °C Storage Temperature TSTG -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 Input Voltage Output Voltage (Note 1) Line Regulation Load Regulation Output Current (Note 2) Current Consumption During Short-Circuit Current Operation Shutdown SYMBOL TEST CONDITIONS VIN VOUT(E) VIN =VOUT(S)+1.0V,IOUT =100mA ΔVOUT1 VOUT(S) + 0.5V ≤VIN ≤6.5V, ΔVIN × VOUT IOUT = 100mA ΔVOUT2 IOUT ISS1 ISS2 ISHORT MIN -1% 0.05 30 TYP MAX UNIT 6.5 V +1% V 0.3 100 %/V mV mA 80 0.1 350 0.8 0.15 0.15 0.12 ±150 70 dB 65 1.0 0.22 0.22 0.18 160 1.0 µA µA mA
Dropout Voltage (Note 3) Temperature Coefficient of Output Voltage Power Supply Rejection
VD
TCVO
PSRR
Shutdown Pin Input High VSH V Voltage Low VSL 0.3 V Shutdown Pin Input High ISH 0.1 µA Current Low ISL 0.1 µA Detection TSD Thermal Shutdown 150 °C Temperature Release TSR 120 °C Notes: 1.VOUT(S): Specified output voltage. VOUT(E): Actual output voltage at the fixed load When fixing( IOUT= 100mA) and inputting VOUT(S) + 1.0 V 2.This output current means the one at which the output voltage becomes 98% of VOUT(E) after gradually increasing the output current. 3.The dropant voltage is detmed as VIN - VOUT, which is measured when VOUT is VOUT(normal) × 98%
VIN = VOUT(S) + 1.0 V, 1.0mA ≤IOUT ≤300mA VIN ≤VOUT(S)+1.0 V 800 VIN = VOUT(S) +1.0 V, ON/OFF pin = ON, no load VIN = VOUT(S) + 1.0 V, ON/OFF pin = OFF, no load VIN = VOUT(S) + 1.0 V, ON/OFF pin = ON, VOUT = 0 V VOUT(S) =1.2V VOUT(S) =2.5V IOUT = 300mA VOUT(S) =2.8V VOUT(S) =3.5V VIN = VOUT(S) +1.0V, IOUT = 10mA, -40°C≤ Ta ≤85°C VIN= VOUT(S)+1.0 V 1.2 V ≤VOUT(S)≤ 3.0 V f = 1.0kHz, IOUT = 100 mA 3.1 V ≤VOUT(S)≤ 5.5 V ΔVrip = 0.5Vrms VIN = VOUT(S) +1.0V 1.5 VIN = VOUT(S) + 1.0V VIN = 6.5V, VON/OFF = 6.5V -0.1 VIN = 6.5V, VON/OFF = 0V -0.1 Junction temperature Junction temperature
V ppm/° C
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OPERATION
1. Basic operation
Preliminary
CMOS IC
The reference voltage (VREF) and VFB(the output voltage resistance-divided by feedback resistors RS 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. 1. When the ON/OFF pin is not used, connect it to the VSS pin if the logic type is “A” and to the VIN pin if it is “B”. Current Consumption Logic Type ON/OFF Pin Internal Circuits VOUT Pin Voltage A “L”: Power on Operating Set value ISS1 A “H”: Power off Stopped VSS level ISS2 B “L”: Power off Stopped VSS level ISS2 B “H”: Power on Operating Set value ISS1
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TEST CIRCUITS
1. Output Voltage Test
Preliminary
CMOS IC
2. Current Consumption Test
3. Output Current Test
4. Shutdown Pin Input Voltage / Current Test
5. Power Supply Rejection Test
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TYPICAL APPLICATION CIRCUIT
Preliminary
CMOS IC
Notes: CIN is a capacitor for stabilizing the input. A ceramic capacitor of 4.7μF or more can be used for COUT
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.
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