UNISONIC TECHNOLOGIES CO., LTD UM5237 Preliminary LINEAR INTEGRATED CIRCUIT 3-TERMINAL ADJUSTABLE REGULATOR DESCRIPTION The UTC UM5237 is a 3-terminal adjustable regulator. It’s used as a variable output voltage regulator. The UTC UM5237 has a less power dissipation and more exact loading voltage regulation .it‘s suitable for driver circuit, differential amplifier and reference voltage generator circuit, etc. 1 SOT-89 FEATURES * Wide Input/Output voltage range * Low Dropout Voltage * Over current protect * External circuit can adjust the output voltage ORDERING INFORMATION Ordering Number Lead Free Halogen Free UM5237L-AB3-R UM5237G-AB3-R Note: Pin Assignment: O: OUTPUT G: GROUND I: INPUT UM5237G-AB3-R Package SOT-89 Pin Assignment 1 2 3 O G I (1)Packing Type (1) R: Tape Reel (2)Package Type (2) AB3: SOT-89 (3)Halogen Free (3) G: Halogen Free, L: Lead Free Packing Tape Reel MARKING INFORMATION www.unisonic.com.tw Copyright © 2013 Unisonic Technologies Co., Ltd 1 of 6 QW-R101-040.c UM5237 Preliminary LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R101-040.c UM5237 Preliminary LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise noted) PARAMETER SYMBOL RATINGS UNIT Input Voltage VIN 30 V Drive Current ID 30 mA Input/Output Voltage Difference VIN -VOUT 28 V Internal Power Dissipation PD 500 mW Operating Temperature TOPR -20~+75 °C Storage Temperature TSTG -55~+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. RECOMMENDED OPERATING CONDITIONS PARAMETER Supply Voltage Range Output Voltage Range SYMBOL VIN VOUT RATINGS 3.5~30 1.5~25 UNIT V V ELECTRICAL CHARACTERISTICS Test circuit (a) is used with TA=25°C, VI=15V, VO=12V, IL=200mA, CREF=1μA, R1=4.3KΩ PARAMETER SYMBOL TEST CONDITIONS Input Voltage VIN Between Pin 1 and Pin 2 Output Voltage VOUT R2≈0.82~108KΩ Minimum Input/Output Voltage VIN -VOUT Difference Reference Voltage VREF Between Pin 2 and Pin 3 Input Voltage Regulation Reg-in VI=15~20V Loading Voltage Regulation Reg-L IL=10~200mA IL=0 (disregarding the current in Bias Current IB resistors R1, R2) Output Voltage Thermal Coefficient TCVO TA=0~75°C f=120Hz Ripple Rejection RR measured with circuit (b) Output Noise Voltage VNO f=20Hz~100KHZ UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 3.5 1.5 TYP MAX 30 28 0.2 1.2 UNIT V V V 1.26 0.02 0.02 1.32 0.1 0.1 V %/V % 1.7 3.0 mA 0.02 %/°C 68 dB 25 μVrms 3 of 6 QW-R101-040.c UM5237 Preliminary LINEAR INTEGRATED CIRCUIT TEST CIRCUIT (a) Standard test circuit R R VO=VREF 1 2 1.26 1 2 (V) R 4.3 1 V V R2=R1 O 1 4.3 O 1 (KΩ) 1.26 VREF (R1=4.3KΩ, VRER≈1.26V) (b) Ripple rejection test circuit f=120Hz, ei=0.1Vrms 2SB1314 + R2 VI 220 C 0.33µF 1 UTC UM5237 3 + CREF + C e RR=20 log e i (dB) o C RL 47µ IL VV eo R1 4.3K 2 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 6 QW-R101-040.c UM5237 Preliminary LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT 1. Standard Application Circuit R2 36.6KΩ VI=12.2V VO=12V + 2SB1314 RI 220Ω R1 CREF 4.3KΩ 1000pF 100µF 2 3 1 0.33µF R VO=VREF 1 2 R1 V , VREF=1.26V 2. Maximum Drive Current Controller Application Circuit R2 36.6KΩ VI=12.2V VO=12V 2SB1314 RI 220Ω + 100µF RIN 470Ω R1 CREF 4.3KΩ 1000pF 3 2 1 0.33µF 3. Output Voltage ON/OFF Controller Set control circuit resistor R so that voltage of point A is more than 1.5V and less than 5V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R101-040.c UM5237 Preliminary LINEAR INTEGRATED 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 6 QW-R101-040.c