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SC4625

Semtech
Part Number SC4625
Manufacturer Semtech
Description 1.7MHz High Efficiency Monolithic 0.5A Synchronous Buck Converter
Published Jun 11, 2010
Detailed Description 1.7MHz High Efficiency Monolithic 0.5A Synchronous Buck Converter POWER MANAGEMENT Description SC4625 is a BiCMOS integr...
Datasheet PDF File SC4625 PDF File

SC4625
SC4625

Overview
1.
7MHz High Efficiency Monolithic 0.
5A Synchronous Buck Converter POWER MANAGEMENT Description SC4625 is a BiCMOS integrated FET, synchronous, 0.
5A step-down regulator.
It operates at the typical switching frequency of 1.
7MHz and enables the user to choose a very small and inexpensive external output inductor and capacitor.
www.
DataSheet4U.
com SC4625 Features Fully integrated MOSFET switches and compensation 1.
7MHz fixed frequency operation Input voltage range: 2.
5V to 5.
5V Adjustable output voltage from 0.
5V to VIN Pulse-skipping mode operation at light load 100% duty cycle in low-dropout mode Over-temperature shutdown MLP-10 lead free package.
This product is fully WEEE and RoHS compliant ‹ -40°C to +125°C junction temperature range ‹ ‹ ‹ ‹ ‹ ‹ Fully internally compensated current-mode control loop ‹ provides a fast transient response and ensures excellent line and load regulation.
The SC4625 operates from 2.
5V ‹ to 5.
5V, features internal P-MOS and N-MOS power switches and is implemented as a current-mode pulse-widthmodulated (PWM) control scheme.
Multiple modes of operation are available to achieve high performance and efficiency and makes the SC4625 ideally suited for electronic devices where size is at premium.
These modes are: PWM fixed frequency, synchronous and asynchronous load dependent, pulse-skipping at very light load, and low-dropout 100% duty cycle mode, by continuously turning on the upper P-MOSFET.
Applications ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ WLAN and Bluetooth® applications Distributed Power Systems Micro DC-DC converters USB-based DSL modems Point-of-Load Regulation FPGA Core and I/O Supplies Set-top Boxes Battery-powered devices (1 Li -Ion or 3 NiMh/NiCd) Typical Application Circuit Vin U1 SC4625 1 PH GND 10 L1 + C3 Vout _ 2 VIN GND 9 C1 3 NC NC 8 C2 4 NC REG 7 R1 5 EN FB 6 R2 Revision: November 30, 2005 1 www.
semtech.
com SC4625 POWER MANAGEMENT Absolute Maximum Ratings Parameter Supply Voltage Output Switch Voltage Voltage at EN and FB Cont...


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