P4596

P4596 UTC | Alldatasheet

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UNISONIC TECHNOLOGIES CO., LTD P4596 Preliminary LINEAR INTEGRATED CIRCUIT www.unisonic.com.tw 1 of 4 Copyright © 2013 Unisonic Technologies Co., Ltd QW-R103-064.a PWM CONTROL 3A STEP-DOWN CONVERTER „ DESCRIPTION The UTC P4596 consists of 3A step-down switching regulator with PWM control which includes a reference voltage source, oscillation circuit, error amplifier, internal PMOS and etc. The UTC P4596 can provide low-ripple power, high efficiency, and excellent transient characteri stics and an enable function, an over current protect function and a short circuit protect function are built inside, And the PWM control circuit can vary the duty ratio linearly from 100 down to 0%. This converter also includes an error amplifier circuit as well as a soft-start circuit that prevents overshoot at startup. These ICs can work as step-down switching regulators with the addition of an internal P-channel Power MOS, a coil and a diode connected externally. They provide such outstanding features: low current c onsumption. It is also suitable for the operation via an AC adapt er because this converter can accommodate an input voltage up to 40V. „ FEATURES * Input voltage：8V~40V * Duty ratio：0%~100% PWM control * Enable with Soft-Start function * Oscillation frequency can be set by outside resistance * Current Limit, SCP and OTP HSOP-8 „ ORDERING INFORMATION Ordering Number Package Packing Lead Free Halogen Free P4596L-SH2-R P4596G-SH2-R HSOP-8 Tape Reel Note: xx: Output Voltage, refer to Marking Information. P4596L-xx-SH2-R (1)Packing Type (2)Package Type (3)Output Voltage Code (1) R: Tape Reel (2) SH2: HSOP-8 (3) xx: Refer to Marking Information (4) L: Lead Free, G: Halogen Free(4)Halogen Free

P4596 Preliminary LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 2 of 4 www.unisonic.com.tw Q W - R 1 0 3 - 0 6 4 . a „ PIN CONFIGURATION „ PIN DESCRIPTION PIN NO. PIN NAME DESCRIPTION

1 EN/SS Enable and Soft-start pin

2 V SS Ground

3 VGATE Driver GATE clamping pin.

4 V CC IC power supply pin

5 SW Switch pin.

6 FB Feedback voltage

7 COMP Compensation pin

8 OSC Frequency Set Pin. „ BLOCK DIAGRAM VCC VGATE VSS SWOSCCOMP FB EN/SS START-UPREGULATOR 2.5V1.23V REFERENCEBIAS OCP Oscillator 0.815 V AMP - COMP. COMP. - PWM OTP

P4596 Preliminary LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 3 of 4 www.unisonic.com.tw Q W - R 1 0 3 - 0 6 4 . a „ ABSOLUTE MAXIMUM RATING (TA=25°C) PARAMETER SYMBOL RATINGS UNIT VCC Pin Voltage V CC V SS-0.3~VSS+45 V Feedback Pin Voltage V FB V SS-0.3~6 V EN/SS Pin Voltage V EN/SS V SS-0.3~6 V OSC Pin Voltage V OSC V SS-0.3~3 V COMP Pin Voltage V COMP V SS-0.3~6 V VGATE Pin Voltage V GATE V SS-0.3~VCC V Switch Pin Voltage V SW V SS-0.3~VCC+0.3 V Power Dissipation P D Internally limited mW Operating Supply Voltage V OP 8~40 V Junction Temperature T J -40~+125 °C Storage Temperature T STG -65~+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. „ ELECTRICAL CHARACTERISTICS (VCC=12V, TA=25°C, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Feedback Voltage V FB VCC=10V~30V, IOUT=0~2A TJ=-20°C~125°C 0.800 0.815 0.830 V Quiescent Current I CCQ V FB=1V 3 6 mA Feedback Bias Current I FB I OUT=0.1A 0.1 μA Shutdown Supply Current I SD V EN/SS=0V 10 56 300 μA Current Limit I CL 3.5 A Adjustable Frequency Range F OSC 50 380 KHz Short Frequency F OSC1 V CC=10V~30V 45 50 55 KHz EN/SS Pin Shutdown Logic Input Threshold Voltage VENL 0.8 V EN/SS Pull High Current I EN/SS V EN/SS=0V 8 μA Internal MOSFET RDSON R DSON V CC=12V, VFB=0V 80 180 m Ω

P4596 Preliminary LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 4 of 4 www.unisonic.com.tw Q W - R 1 0 3 - 0 6 4 . a „ TYPICAL APPLICATION 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.