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G5728B

Global Mixed-mode Technology
Part Number G5728B
Manufacturer Global Mixed-mode Technology
Description 1.4MHz 1A Synchronous Step-Down Regulator
Published Jan 10, 2016
Detailed Description Global Mixed-mode Technology G5728B 1.4MHz 1A Synchronous Step-Down Regulator Features „ High Efficiency: Up to 93% „...
Datasheet PDF File G5728B PDF File

G5728B
G5728B

Overview
Global Mixed-mode Technology G5728B 1.
4MHz 1A Synchronous Step-Down Regulator Features „ High Efficiency: Up to 93% „ Low Quiescent Current: Only 50µA During Op- eration „ Internal Soft Start Function „ 1A Output Current „ 2.
5V to 6V Input Voltage Range „ 1.
4MHz Switching Frequency „ No Schottky Diode Required „ 100% Duty Cycle in Dropout Operation „ 0.
6V Reference Allows Low Output Voltages „ <1µA Shutdown Current „ Current Mode Operation for Excellent Line and Load Transient Response „ Over Temperature Protected „ RoHS Compliant General Description The G5728B is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture.
Supply current during operation is only 50µA and drops to <1µA in shutdown.
The 2.
5V to 6V input voltage range makes the G5728B ideally suited for single Li-Ion battery-powered applications.
100% duty cycle provides low dropout operation, extending battery run time in portable systems.
Switching frequency is internally set at 1.
4MHz, allowing the use of small surface mount inductors and capacitors.
The internal synchronous switch increase efficiency and eliminates the need for an external Schottky diode.
Built-in soft start function eliminates in-rush current that could damage the system.
Applications „ Cellular Telephones „ Personal Information Appliances „ Microprocessors and DSP Core Supplies „ Wireless and DSL Modems „ Digital Still and Video Cameras „ MP3 Players „ Portable Instruments Ordering Information ORDER NUMBER MARKING OUTPUT VOLTAGE (V) G5728BT11U 578Bx Adjustable G5728BTO1U 578Bx Adjustable G5728B-12TO1U 578Dx 1.
2 G5728BU51D 578B Note: T1: SOT-23-5 TO:TSOT-23-5 U5:WDFN2X2-6 1: Bonding Code U&D: Tape & Reel Adjustable TEMP.
RANGE -40°C~ +85°C -40°C~ +85°C -40°C~ +85°C -40°C~ +85°C PACKAGE (Green) SOT-23-5 TSOT-23-5 TSOT-23-5 WDFN2X2-6 Pin Configuration Typical Application Circuit EN 1 GND 2 G5728B 5 VFB VFB 1 GND 2 G5728B 7 GND 6 EN 5 LX LX 3 4 VIN VI...


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