LD1985G-XX-AF5-R

UNISONIC TECHNOLOGIES CO., LTD LD1985 VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR LOW ESR CAP. COMPATIBLE, WITH INHIBIT FUNCTION DESCRIPTION The UTC LD1985 is a 150mA fixed output voltage regulator. The ultra low drop voltage and the low quiescent current make them particularly suitable for low noise, low power applications, and in battery powered systems. In sleep mode quiescent current is less than 1μA when INHIBIT pin is pulled low. Shutdown Logic Control Function is available on pin 3 (TTL compatible). This means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. An external capacitor, CBYP=10nF, connected between bypass pin and GND reduce the noise to 30μVrms. Typical application is in cellular phone, palmtop laptop computer, personal digital assistant (PDA), personal stereo, camcorder and camera. LINEAR INTEGRATED CIRCUIT FEATURES * Very Low Dropout Voltage (280mV at 150mA and 7mV at 1mA Load) * Very Low Quiescent Current (2mA Typ. at 150mA Load and 80μA at no Load) * Output Current up to 150mA * Logic Controlled Electronic Shutdown * Output Voltage of 1.5, 1.8, 2.5, 2.8, 2.85, 3, 3.1, 3.2, 3.3, 3.5, 3.6, 3.8, 4, 4.7, 5V * Internal Current and Thermal Limit * Low Output Noise Voltage 30μVrms ORDERING INFORMATION Ordering Number Lead Free Halogen Free LD1985L-xx-AF5-R LD1985G-xx-AF5-R Note: xx: Output Voltage, refer to Marking Information. Package SOT-25 Packing Tape Reel www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 1 of 10 QW-R102-021,F LD1985 MARKING INFORMATION PACKAGE VOLTAGE CODE 15:1.5V 18:1.8V 25:2.5V 28:2.8V 2J:2.85V 30:3.0V 31:3.1V SOT-25 32:3.2V 33:3.3V 35:3.5V 36:3.6V 38:3.8V 40:4.0V 47:4.7V 50:5.0V LINEAR INTEGRATED CIRCUIT MARKING PIN CONFIGURATION PIN DESCRIPTION PIN NO. 1 2 3 4 5 PIN NAME VIN GND INHIBIT Bypass VOUT DESCRIPTION Input port Ground Pin Control switches ON/OFF. Inhibit is not internally pulled-up; it cannot be left floating. Disable the device when connected to GND or to a positive voltage less than 0.18V Bypass pin: capacitor to be connected to GND in order to improve the thermal noise performances. Output port UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 10 QW-R102-021,F LD1985 BLOCK DIAGRAM VIN CURRENT LIMIT LINEAR INTEGRATED CIRCUIT VOUT INHIBIT START-UP SHUTDOWN REFERENCE VOLTAGE ERROR AMPLIFIER DRIVER BYPASS TERM. PROTEC. GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 10 QW-R102-021,F LD1985 ABSOLUTE MAXIMUM RATINGS (Ta=25°C) LINEAR INTEGRATED CIRCUIT PARAMETER SYMBOL RATINGS UNIT DC Input Voltage VIN 7 V INHIBIT Input Voltage VINH 7 V Output Current IOUT Internally limited Power Dissipation PD Internally limited Operating Junction Temperature TOPR -20 ~ +125 °C Storage Temperature TSTG -40 ~ +150 °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. THERMAL DATA PARAMETER Junction to case SYMBOL θJC RATINGS 81 UNIT °C/W ELECTRICAL CHARACTRISTICS (TJ=25°C, VIN=VOUT+1V, IOUT=1mA, VSHDN=2V, CI=1μF, CO=1μF, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP Operating Input Voltage VI(OPR) 2.5 VIN=2.5V 1.470 1.5 Output Voltage VOUT IOUT=1 ~ 150mA 1.455 VIN =2.8V 1.764 1.8 Output Voltage VOUT IOUT =1 ~ 150mA 1.746 VIN =3.5V 2.450 2.5 Output Voltage VOUT IOUT =1 ~ 150mA 2.425 VIN =3.8V 2.744 2.8 Output Voltage VOUT IOUT =1 ~ 150mA 2.716 VIN =3.85V 2.793 2.85 Output Voltage VOUT IOUT =1 ~ 150mA 2.764 VIN =4.0V 2.940 3.0 Output Voltage VOUT IOUT =1 ~ 150mA 2.910 VIN =4.1V 3.038 3.1 Output Voltage VOUT IOUT =1 ~ 150mA 3.007 VIN =4.2V 3.136 3.2 Output Voltage VOUT IOUT =1 ~ 150mA 3.104 VIN =4.3V 3.234 3.3 Output Voltage VOUT IOUT =1 ~ 150mA 3.201 VIN =4.5V 3.430 3.5 Output Voltage VOUT IOUT =1 ~ 150mA 3.395 VIN =4.6V 3.528 3.6 Output Voltage VOUT IOUT =1 ~ 150mA 3.492 VIN =4.8V 3.724 3.8 Output Voltage VOUT IOUT =1 ~ 150mA 3.686 VIN =5.0V 3.920 4 Output Voltage VOUT IOUT =1 ~ 150mA 3.880 VIN =5.7V 4.606 4.7 Output Voltage VOUT IOUT =1 ~ 150mA 4.559 VIN =6.0V 4.900 5 Output Voltage VOUT IOUT =1 ~ 150mA 4.850 Short Circuit Current Isc RL=0 400 MAX 7 1.530 1.545 1.836 1.854 2.550 2.575 2.856 2.884 2.907 2.936 3.060 3.090 3.162 3.193 3.264 3.296 3.366 3.399 3.570 3.605 3.672 3.708 3.876 3.914 4.080 4.120 4.794 4.841 5.100 5.150 UNIT V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V mA UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 10 QW-R102-021,F LD1985 ELECTRICAL CHARACTRISTICS(Cont.) PARAMETER Line Regulation SYMBOL △VOUT LINEAR INTEGRATED CIRCUIT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage SVR VIL VIH IINH eN TEST CONDITIONS VIN = VOUT +1V ~ 7V, IOUT =1mA IOUT =0 TJ=-20 ~ 125°C, IOUT=0 IOUT =1mA IOUT =1mA, TJ=-20 ~ 125°C IOUT =10mA IOUT =10mA, TJ=-20 ~ 125°C IOUT =50mA IOUT =50mA, TJ=-20 ~ 125°C IOUT =150mA IOUT =150mA, TJ=-20 ~ 125°C IOUT =0 TJ=-20 ~ 125°C, IOUT=0 IOUT =1mA IOUT =1mA, TJ=-20 ~ 125°C IOUT =10mA IOUT =10mA, TJ=-20 ~ 125°C IOUT =50mA IOUT =50mA, TJ=-20 ~ 125°C IOUT =150mA IOUT =150mA, TJ=-20 ~ 125°C OFF MODE VINH