LD1985_05

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 with ultra low drop voltage and the low quiescent current. It is specially designed for low noise, low power applications and in battery powered systems, such as Cell phones, palmtop laptop computer, PDAs, DSC. The quiescent current in sleep mode is less than 1µA when INHIBIT pin is pulled low. Due to Shutdown Logic Control Function is available on pin 3 (TTL compatible), 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 Besides, an external capacitor, CBYP=10nF, connected between bypass pin and GND could reduce the noise to 30µVrms. LINEAR INTEGRATED CIRCUIT 3 2 1 4 5 SOT-25 *Pb-free plating product number: LD1985L 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, 5.0V *Internal current and thermal limit *± 1% tolerance version is available.(at 25℃) *Low output noise voltage 30µVrms ORDERING INFORMATION Order Number Package Normal Lead Free Plating LD1985-xx-AF5-R LD1985L-xx-AF5-R SOT-25 Note: xx: Output Voltage, refer to Marking Information. LD1985L-xx-AF5-R (1)Packing Type (2)Package Type (3)Output Voltage Code (4)Lead Plating (1) R: Tape Reel (2) AF5: SOT-25 (3) xx: refer to Marking Information (4) L: Lead Free Plating, Blank: Pb/Sn Packing Tape Reel www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., Ltd 1 of 10 QW-R102-021,C 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 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 3 2 1 Lead Plating SOT-25 LD Voltage Code 4 5 PIN DESCRIPTION PIN NO. 1 2 3 4 5 PIN NAME VIN GND INHIBIT Bypass VOUT FUNCTION Input Ground Control switch 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 THERMAL DATA PARAMETER Thermal Resistance Junction-Case SYMBOL θJC RATINGS 81 UNIT ℃/W UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 10 QW-R102-021,C LD1985 BLOCK DIAGRAM VIN CURRENT LIMIT START-UP SHUTDOWN REFERENCE VOLTAGE ERROR AMPLIFIER LINEAR INTEGRATED CIRCUIT V OUT SHDN DRIVER BYPASS TERM. PROTEC. GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 10 QW-R102-021,C LD1985 ABSOLUTE MAXIMUM RATINGS (Ta=25℃) 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 ℃ Storage Temperature TSTG -40~+150 ℃ Note 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. The device is guaranteed to meet performance specification within 0℃~+70℃ operating temperature range and assured by design from -20℃~+125℃ ELECTRICAL CHARACTRISTICS (TJ=25℃, VIN=VOUT+1V, IOUT=1mA, VSHDN=2V, CIN=1µF, COUT=1µF, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Operating Input Voltage VIN(OPR) 2.5 7.0 V 1.0% 1.485 1.515 VIN=2.5V 1.5 V 1.5% 1.477 1.523 1.0% 1.462 1.538 IOUT=1 ~ 150mA V Output Voltage VOUT 1.5% 1.455 1.545 1.0% 1.447 1.553 IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ V 1.5% 1.440 1.560 1.0% 1.782 1.818 VIN=2.8V 1.8 V 1.5% 1.773 1.827 1.0% 1.755 1.845 Output Voltage VOUT IOUT=1 ~ 150mA V 1.5% 1.746 1.854 1.0% 1.737 1.863 IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ V 1.5% 1.728 1.872 1.0% 2.475 2.525 VIN=3.5V 2.5 V 1.5% 2.4625 2.5375 1.0% 2.4375 2.5625 Output Voltage VOUT IOUT=1 ~ 150mA V 1.5% 2.425 2.575 1.0% 2.4125 2.5875 IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ V 1.5% 2.4 2.6 1.0% 2.772 2.828 VIN=3.8V 2.8 V 1.5% 2.758 2.842 1.0% 2.730 2.870 Output Voltage VOUT IOUT=1 ~ 150mA V 1.5% 2.716 2.884 1.0% 2.702 2.898 IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ V 1.5% 2.688 2.912 1.0% 2.821 2.879 VIN=3.85V 2.85 V 1.5% 2.807 2.893 1.0% 2.778 2.921 Output Voltage VOUT IOUT=1 ~ 150mA V 1.5% 2.764 2.935 1.0% 2.750 2.950 IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ V 1.5% 2.736 2.964 1.0% 2.970 3.030 VIN=4.0V 3.0 V 1.5% 2.955 3.045 1.0% 2.925 3.075 Output Voltage VOUT IOUT=1 ~ 150mA V 1.5% 2.91 3.09 1.0% 2.895 3.105 IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ V 1.5% 2.88 3.12 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 10 QW-R102-021,C LD1985 ELECTRICAL CHARACTRISTICS(Cont.) PARAMETER SYMBOL VIN=4.1V Output Voltage VOUT IOUT=1 ~ 150mA LINEAR INTEGRATED CIRCUIT TEST CONDITIONS 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ VIN=4.2V Output Voltage VOUT IOUT=1 ~ 150mA IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ VIN=4.3V Output Voltage VOUT IOUT=1 ~ 150mA IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ VIN=4.5V Output Voltage VOUT IOUT=1 ~ 150mA IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ VIN=4.6V Output Voltage VOUT IOUT=1 ~ 150mA IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ VIN=4.8V Output Voltage VOUT IOUT=1 ~ 150mA IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ VIN=5.0V Output Voltage VOUT IOUT=1 ~ 150mA IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ VIN=5.7V Output Voltage VOUT IOUT=1 ~ 150mA IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ MIN 3.069 3.0535 3.022 3.007 2.9915 2.976 3.168 3.152 3.120 3.104 3.088 3.072 3.267 3.2505 3.2175 3.201 3.1845 3.168 3.465 3.447 3.412 3.395 3.377 3.360 3.564 3.546 3.510 3.492 3.474 3.456 3.762 3.743 3.705 3.686 3.667 3.648 3.96 3.94 3.9 3.88 3.86 3.84 4.653 4.6295 4.582 4.559 4.5355 4.512 TYP 3.1 3.2 3.3 3.5 3.6 3.8 4.0 4.7 MAX UNIT 3.131 V 3.1465 3.1775 V 3.193 3.2085 V 3.224 3.232 V 3.248 3.280 V 3.296 3.312 V 3.328 3.333 V 3.3495 3.3825 V 3.399 3.4155 V 3.432 3.535 V 3.552 3.587 V 3.605 3.622 V 3.640 3.636 V 3.654 3.690 V 3.708 3.726 V 3.744 3.838 V 3.857 3.895 V 3.914 3.933 V 3.952 4.04 V 4.06 4.1 V 4.12 4.14 V 4.16 4.747 V 4.7705 4.817 V 4.841 4.8645 V 4.888 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 10 QW-R102-021,C LD1985 ELECTRICAL CHARACTRISTICS(Cont.) PARAMETER SYMBOL VIN=6.0V Output Voltage VOUT IOUT=1 ~ 150mA LINEAR INTEGRATED CIRCUIT TEST CONDITIONS 1.0% 1.5% 1.0% 1.5% 1.0% 1.5% IOUT =1 ~ 150mA, TJ=-20 ~ 125℃ Short Circuit Current Line Regulation Isc MIN 4.95 4.925 4.875 4.85 4.825 4.8 TYP 5.0 MAX 5.05 5.075 5.125 5.15 5.175 5.2 UNIT V V V RL=0 VIN =Vo+1V ~ 7V, IOUT =1mA △Vo/△VI VIN =Vo+1V ~ 7V, IOUT =1mA, TJ=-20 ~ 125℃ IOUT =0 IOUT =0, TJ=-20 ~ 125℃ IOUT =1mA IOUT =1mA, TJ=-20 ~ 125℃ 400 0.003 1 7 40 120 280 80 100 200 600 2000 0 45 2 5 0 30 Dropout Voltage VD IOUT =10mA IOUT =10mA, TJ=-20 ~ 125℃ IOUT =50mA IOUT =50mA, TJ=-20 ~ 125℃ IOUT =150mA IOUT =150mA, TJ=-20 ~ 125℃ IOUT =0 IOUT =0, TJ=-20 ~ 125℃ IOUT =1mA IOUT =1mA, TJ=-20 ~ 125℃ Quiescent Current IQ IOUT =10mA IOUT =10mA, TJ=-20 ~ 125℃ IOUT =50mA IOUT =50mA, TJ=-20 ~ 125℃ IOUT =150mA IOUT =150mA, TJ=-20 ~ 125℃ OFF mode VINH