UNISONIC TECHNOLOGIES CO., LTD LD2985 LINEAR INTEGRATED CIRCUIT VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR LOW ESR CAP. COMPATIBLE, WITH INHIBIT FUNCTION DESCRIPTION The UTC LD2985 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 applications are in cellular phone, palmtop laptop computer, personal digital assistant (PDA), personal stereo, camcorder and camera. FEATURES * Very Low Dropout Voltage (280mV at 150mA and 7mV at 1mA load) * Very Low Quiescent current * 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 LD2985G-xx-AF5-R Note: xx: Output Voltage, refer to Marking Information. www.unisonic.com.tw Copyright © 2016 Unisonic Technologies Co., Ltd Package SOT-25 Packing Tape Reel 1 of 15 QW-R102-024.L LD2985 LINEAR INTEGRATED CIRCUIT MARKING INFORMATION PACKAGE SOT-25 VOLTAGE 1.5V 1.8V 2.5V 2.8V 2.85V 3.0V 3.1V 3.2V 3.3V 3.5V 3.6V 3.8V 4.0V 4.7V 5.0V PIN CONFIGURATION PIN DESCRIPTION PIN NO. 1 2 3 4 5 VOLTAGE CODE A5 A8 B5 B8 BJ C0 C1 C2 C3 C5 C6 C8 D0 D7 E0 MARKING PIN NAME DESCRIPTION IN Input port GND Ground pin Control switches ON/OFF. Inhibit is not internally pulled-up; it cannot be left floating. INHIBIT 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 Bypass performances. OUT Output port UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 15 QW-R102-024.L LD2985 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 15 QW-R102-024.L LD2985 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT DC Input Voltage ViN 16 V INHIBIT Input Voltage VINH 16 V Output Current IOUT Internally limited Power Dissipation PD Internally limited Operating Junction Temperature (Note 2) TOPR -40 ~ +125 °C Storage Temperature TSTG -40 ~ +150 °C Notes: 1. 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. 2. This condition is only determined from design. It can't be 100% tested in mass production. THERMAL DATA PARAMETER SYMBOL θJC Junction to Case RATINGS 81 UNIT °C/W ELECTRICAL CHARACTERISTICS (TJ=25°C, VI N=VOUT+1V, IOUT=1mA, VSHDN=2V, CI =1μF, CO=1μF, unless otherwise specified) FOR VOUT=1.5V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC △VOUT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IINH Output Noise Voltage eN TEST CONDITIONS VIN=2.5V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, CO=10μF, f=1KHz TJ=-20 ~125°C TJ=-20 ~125°C TJ=-20 ~125°C, VSHDN=VIN TJ=-20 ~125°C, VSHDN=0V B=300Hz ~ 50KHz, CBYP=0.01μF, CO=10μF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP 1.470 1.455 1.5 MAX 16 1.530 1.545 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 30 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 30 15 -1 UNIT V V V mA mV mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA μV 4 of 15 QW-R102-024.L LD2985 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) FOR VOUT=1.8V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC △VOUT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IiNH Output Noise Voltage eN FOR VOUT=2.5V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC △VOUT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IINH Output Noise Voltage eN TEST CONDITIONS VIN=2.8V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, Co=10μF, f=1KHz TJ=-20 ~ 125°C TJ=-20 ~ 125°C TJ=-20 ~ 125°C, VSHDN=VIN TJ=-20 ~ 125°C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01μF, Co=10μF TEST CONDITIONS VIN=3.5V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, Co=10μF, f=1KHz TJ=-20 ~ 125°C TJ=-20 ~ 125°C TJ=-20 ~ 125°C, VSHDN=VIN TJ=-20 ~ 125°C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01μF, Co=10μF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP 1.764 1.746 1.8 MAX 16 1.836 1.854 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 30 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 15 -1 30 MIN TYP 2.450 2.425 2.5 μV MAX 16 2.550 2.575 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 30 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 30 UNIT V V V mA mV mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA 15 -1 UNIT V V V mA mV mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA μV 5 of 15 QW-R102-024.L LD2985 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) FOR VOUT=2.8V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC △VOUT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IINH Output Noise Voltage eN FOR VOUT=2.85V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC △VOUT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IINH Output Noise Voltage eN TEST CONDITIONS VIN=3.8V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, Co=10μF, f=1KHz TJ=-20 ~ 125°C TJ=-20 ~ 125°C TJ=-20 ~ 125°C, VSHDN=VIN TJ=-20 ~ 125°C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01μF, Co=10μF TEST CONDITIONS VIN=3.85V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, CO=10μF, f=1KHz TJ=-20 ~ 125°C TJ=-20 ~ 125°C TJ=-20 ~ 125°C, VSHDN=VIN TJ=-20 ~ 125°C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01μF, CO=10μF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP 2.744 2.716 2.8 MAX 16 2.856 2.884 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 30 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 15 -1 30 MIN TYP 2.793 2.764 2.85 μV MAX 16 2.907 2.936 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 30 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 30 UNIT V V V mA mV mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA 15 -1 UNIT V V V mA mV mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA μV 6 of 15 QW-R102-024.L LD2985 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) FOR VOUT=3.0V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC △VOUT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IINH Output Noise Voltage eN FOR VOUT=3.1V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC △VOUT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IINH Output Noise Voltage eN TEST CONDITIONS VIN=4.0V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, CO=10μF, f=1KHz TJ=-20 ~ 125°C TJ=-20 ~ 125°C TJ=-20 ~ 125°C, VSHDN=VIN TJ=-20 ~ 125°C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01μF, CO=10μF TEST CONDITIONS VIN=4.1V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, CO=10μF, f=1KHz TJ=-20 ~ 125°C TJ=-20 ~ 125°C TJ=-20 ~ 125°C, VSHDN=VIN TJ=-20 ~ 125°C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01μF, CO=10μF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP 2.940 2.910 3.0 MAX 16 3.060 3.090 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 30 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 15 -1 30 MIN TYP 3.038 3.007 3.1 μV MAX 16 3.162 3.193 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 30 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 30 UNIT V V V mA mV mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA 15 -1 UNIT V V V mA mV mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA μV 7 of 15 QW-R102-024.L LD2985 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) FOR VOUT=3.2V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC △VOUT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IINH Output Noise Voltage eN FOR VOUT=3.3V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC △VOUT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IINH Output Noise Voltage eN TEST CONDITIONS VIN=4.2V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, CO=10μF, f=1KHz TJ=-20 ~ 125°C TJ=-20 ~ 125°C TJ=-20 ~ 125°C, VSHDN=VIN TJ=-20 ~ 125°C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01μF, CO=10μF TEST CONDITIONS VIN=4.3V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, CO=10μF, f=1KHz TJ=-20 ~ 125°C TJ=-20 ~ 125°C TJ=-20 ~ 125°C, VSHDN=VIN TJ=-20 ~ 125°C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01μF, CO=10μF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP 3.136 3.104 3.2 MAX 16 3.264 3.296 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 30 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 15 -1 30 MIN TYP 3.234 3.201 3.3 μV MAX 16 3.366 3.399 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 30 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 30 UNIT V V V mA mV mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA 15 -1 UNIT V V V mA mV mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA μV 8 of 15 QW-R102-024.L LD2985 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) FOR VOUT=3.5V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC △VOUT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IINH Output Noise Voltage eN FOR VOUT=3.6V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC △VOUT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IINH Output Noise Voltage eN TEST CONDITIONS VIN=4.5V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, CO=10μF, f=1KHz TJ=-20 ~ 125°C TJ=-20 ~ 125°C TJ=-20 ~ 125°C, VSHDN=VIN TJ=-20 ~ 125°C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01μF, CO=10μF TEST CONDITIONS VIN=4.6V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, CO=10μF, f=1KHz TJ=-20 ~ 125°C TJ=-20 ~ 125°C TJ=-20 ~ 125°C, VSHDN=VIN TJ=-20 ~ 125°C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01μF, CO=10μF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP 3.430 3.395 3.5 MAX 16 3.570 3.605 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 30 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 15 -1 30 MIN TYP 3.528 3.492 3.6 μV MAX 16 3.672 3.708 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 30 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 30 UNIT V V V mA mV mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA 15 -1 UNIT V V V mA mV mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA μV 9 of 15 QW-R102-024.L LD2985 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) FOR VOUT=3.8V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC △VOUT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IINH Output Noise Voltage eN FOR VOUT=4.0V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current SYMBOL VI(OPR) VOUT ISC Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IINH Output Noise Voltage eN TEST CONDITIONS VIN=4.8V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, CO=10μF, f=1KHz TJ=-20 ~ 125°C TJ=-20 ~ 125°C TJ=-20 ~ 125°C, VSHDN=VIN TJ=-20 ~ 125°C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01μF, CO=10μF TEST CONDITIONS VIN=5.0V IOUT=1 ~ 150mA RL=0 IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, CO=10μF, f=1KHz TJ=-20 ~ 125°C TJ=-20 ~ 125°C TJ=-20 ~ 125°C, VSHDN=VIN TJ=-20 ~ 125°C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01μF, CO=10μF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP 3.724 3.686 3.8 MAX 16 3.876 3.914 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 30 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 15 -1 30 MIN TYP 3.920 3.880 4 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 μV MAX 16 4.080 4.120 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 30 UNIT V V V mA mV mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA 15 -1 UNIT V V V mA mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA μV 10 of 15 QW-R102-024.L LD2985 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) FOR VOUT=4.7V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC △VOUT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IINH Output Noise Voltage eN FOR VOUT=5.0V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC △VOUT Dropout Voltage VD Quiescent Current IQ Supply Voltage Rejection Control Input Logic Low Control Input Logic High SVR VIL VIH Control Input Current IINH Output Noise Voltage eN TEST CONDITIONS VIN=5.7V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, CO=10μF, f=1KHz TJ=-20 ~ 125°C TJ=-20 ~ 125°C TJ=-20 ~ 125°C, VSHDN=VIN TJ=-20 ~ 125°C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01μF, CO=10μF TEST CONDITIONS VIN=6.0V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01μF, CO=10μF, f=1KHz TJ=-20 ~ 125°C TJ=-20 ~ 125°C TJ=-20 ~ 125°C, VSHDN=VIN TJ=-20 ~ 125°C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01μF, CO=10μF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP 4.606 4.559 4.7 MAX 16 4.794 4.841 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 30 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 15 -1 30 MIN TYP 4.900 4.850 5 μV MAX 16 5.100 5.150 600 1 7 40 120 280 80 100 280 1050 2900 1.5 45 30 3 10 60 150 350 100 150 330 1300 3300 0.15 2 5 0 30 UNIT V V V mA mV mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA 15 -1 UNIT V V V mA mV mV mV mV mV mV μA μA μA μA μA μA dB V V μA μA μV 11 of 15 QW-R102-024.L LD2985 REVERSE CURRENT TEST CIRCUIT APPLICATION INFORMATION LINEAR INTEGRATED CIRCUIT EXTERNAL CAPACITORS Like any low-dropout regulator, the UTC LD2985 requires external capacitors for regulator stability. This capacitor must be selected to meet the requirements of minimum capacitance and equivalent series resistance. We suggest soldering input and outputting capacitors as close as possible to the relative pins. INPUT CAPACITOR An input capacitor whose value is 1μF is required with the UTC LD2985 (amount of capacitance can be increased without limit). This capacitor must be located a distance of not more than 0.5" from the input pin of the device and returned to a clean analog ground. Any good quality ceramic, tantalum or film capacitors can be used for this capacitor. OUTPUT CAPACITOR The UTC LD2985 is designed specifically to work with ceramic output capacitors. It may also be possible to use Tantalum capacitors, but these are not as attractive for reasons of size and cost. By the way, the output capacitor must meet both the requirement for minimum amount of capacitance and E.S.R. (equivalent series resistance) value. Due to the different loop gain, the stability improves for higher output versions and so the suggested minimum output capacitor value, if low E.S.R. ceramic type is used, is 1μF for output voltages equal or major than 3.8V, 2.2μF for VO going from 1.8 ~ 3.3V, and 3.3μF for the other versions. However, if an output capacitor lower than the suggested one is used, it's possible to make stable the regulator adding a resistor in series to the capacitor. IMPORTANT: The output capacitor must maintain its ESR in the stable region over the full operating temperature to assure stability. Also, capacitor tolerance and variation with temperature must be considered to assure the minimum amount of capacitance is provided at all times. This capacitor should be located not more than 0.5" from the output pin of the device and returned to a clean analog ground. INHIBIT INPUT OPERATION The inhibit pin can be used to turn OFF the regulator when pulled low, so drastically reducing the current consumption down to less than 1μA. When the inhibit feature is not used, this pin must be tied to Vi to keep the regulator output ON at all times. To assure proper operation, the signal source used to drive the inhibit pin must be able to swing above and below the specified thresholds listed in the electrical characteristics section under VIH VIL. Any slew rate can be used to drive the inhibit. REVERSE CURRENT The power transistor used in the UTC LD2985 has not an inherent diode connected between the regulator input and output. If the output is forced above the input, no current will flow from the output to the input across the series pass transistor. When a VREV voltage is applied on the output, the reverse current measured flows to the GND across the two feedback resistors. This current typical value is 160μA. R1 and R2 resistors are implanted type; typical values are, respectively, 42.6KΩ and 51.150KΩ. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 12 of 15 QW-R102-024.L LD2985 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS (TJ=25°C, CI=1μF, CO=2.2μF, CBYP=100nF) Output Voltage vs Temperature Quiescent Current vs Load Current 2.60 3000 VIN=3.5V 2.58 IOUT=1mA VOUT=2.5V CBY=10nF 2500 2.54 2000 2.52 IQ (μA) Output Voltage, VOUT (V) 2.56 2.50 1500 2.48 1000 2.46 2.44 500 2.42 2.40 -50 0 -25 50 25 Tc (°C) 75 100 0 125 0 Dropout Voltage vs Temperature 0.4 VOUT=2.5V Cby=10nF IOUT=150mA IOUT=150mA 175 VOUT=2.5V CBY=10nF 3.5 3.0 0.3 2.5 0.2 IQ (mA) Dropout Voltage, VD (V) 50 100 75 125 150 IOUT (mA) Quiescent Current vs Temperature 25 IOUT=50mA 2.0 1.5 1.0 0.1 IOUT=10mA 0.5 IOUT=1mA 0 -50 -25 0 50 25 Tc (°C) 75 100 0 -50 125 Supply Voltage Rejection, SVR (dB) Dropout Voltage, VD (mV) 200 150 100 VOUT=2.5V 0 25 125 75 100 50 Output Current, IOUT (mA) 150 175 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 25 50 ) 75 100 125 Supply Voltage Rejection vs Temperature 250 0 0 TC ( Dropout Voltage vs Output Current 50 -25 fosc=1KHz VIN=3.5 ~ 6.5V 90 IOUT=10mA 80 Co=10μF 70 Co=1μF 60 50 40 30 20 -50 -25 0 50 25 Tc (°C) 75 100 125 13 of 15 QW-R102-024.L LD2985 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS(Cont.) (TJ=25°C, CI=1μF, CO=2.2μF, CBYP=100nF) Supply Voltage Rejection vs Output Current Supply Voltage Rejection vs Frequency 80 100 Supply Voltage Rejection, SVR (dB) Supply Voltage Rejection, SVR (dB) 70 80 60 40 20 0 VIN=3.5 ~ 6.5V CO=10μF fosc=1KHz 0 100 50 40 30 20 VIN=3.5 ~ 6.5V IOUT=10mA 10 VOUT=2.5V CO=1μF 0 1 10 2 10 Frequency, f (KHz) Supply Voltage Rejection vs Output Current Line Transient 75 150 125 175 10 3 Output Current, IOUT (mA) 25 50 60 10 4 10 5 100 Supply Voltage Rejection, SVR (dB) Tek Run:5.00MS/s 80 60 VIN 1 40 1 20 0 VOUT VIN=3.5 ~ 6.5V CO=1μF fosc=1KHz 0 25 50 100 75 150 125 Ch1 500mV Ch2 CH2 20.0mV M 10.0μs Ch1 175 Output Current, IOUT (mA) Line Transient Supply Voltage Rejection vs Frequency 70 Supply Voltage Rejection, SVR (dB) 3.96V VOUT=2.5V, IOUT=50mA, no CIN, COUT=4.7μF, tr=tf=20ns Tek Run:5.00MS/s 60 VIN 50 1 40 30 VOUT 20 10 2 VIN=2.8 ~ 5.8V IOUT=10mA VOUT=1.8V CO=10μF 0 1 10 10 2 10 3 10 4 10 5 Frequency, f (KHz) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw CH2 20.0mV Ch1 500mV Ch2 M 10.0μs Ch1 3.96V VOUT=2.5V, IOUT=50mA, no CIN, COUT=4.7μF, tr=tf=1μs 14 of 15 QW-R102-024.L LD2985 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS(Cont.) (TJ=25°C, CI=1μF, CO=2.2μF, CBYP=100nF) 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 15 of 15 QW-R102-024.L