P1888 Datasheet | Unisonic Technologies

UNISONIC TECHNOLOGIES CO., LTD Preliminary PWM CONTROL 3A STEP-DOWN CONVERTER CMOS IC - DESCRIPTION UTC P1888 consists of 3A step-down switching regulator control which includes a reference voltage source, oscillation circuit, error amplifier, internal PMOS and etc with PWM. UTC P1888 can provide low-ripple power, high efficiency, and excellent transient characteristics and an enable function, an over current protect function and a short circuit protect function are built inside, so the operation frequency will be reduced from 300KHz to 30KHz when OCP or SCP happens. 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. Also, to minimum external ponent count an internal pensation block is built in. UTC P1888 can work as step-down switching regulators with the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode connected externally. It provides such outstanding Features : low current consumption. It is also suitable for the operation via an AC adapter because this converter can acmodate an input voltage up to 23V. - Features - Soft-start, Current Limit, Enable function - Thermal Shutdown function - Built-in internal SW P-channel MOS - Input voltage: 4V~23V. - Output voltage: 1.23V~VCC. - Duty ratio: 0% to 100% PWM control - Oscillation frequency: 300KHz typ. - ORDERING INFORMATION Ordering Number P1888G-S08-R Package SOP-8 SOP-8 Packing Tape Reel .unisonic..tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 4 QW-R103-111.a - MARKING Preliminary CMOS IC - PIN CONFIGURATION NC...