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SP6123A

Sipex
Part Number SP6123A
Manufacturer Sipex
Published Jun 7, 2005
Description Low Voltage Synchronous Step-Down PWM Controller
Detailed Description ® SP6123/SP6123A Ideal for 2A to 10A, Small Footprint, DC-DC Pow
Datasheet PDF File SP6123A PDF File

SP6123A
SP6123A


Overview
® SP6123/SP6123A Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters Low Voltage, Synchronous Step-Down PWM Controller ■ Optimized for Single Supply, 3V - 5.
5V Applications 8 BST GL 1 ■ High Efficiency: Greater Than 95% Possible SP6123 7 GH VCC 2 ■ Accurate Fixed 300kHz (SP6123) or 500kHz 3 6 SWN GND 8 Pin NSOIC (SP6123A) Frequency Operation 5 VFB COMP 4 ■ Fast Transient Response ■ Internal Soft Start Circuit Now Available in Lead Free Packaging ■ Accurate 0.
8V Reference Allows Low Output Voltages APPLICATIONS ■ Resistor Programmable Output Voltage ■ DSP ■ Loss-less Current Limit with High Side RDS(ON) ■ Microprocessor Core Sensing ■ I/O & Logic ■ Hiccup Mode Current Limit Protection ■ Industrial Control ■ Dual N-Channel MOSFET Synchronous Driver ■ Distributed Power ■ Quiescent Current: 500µA, 30µA in Shutdown ■ 8-Pin Surface Mount Package ■ Low Voltage Power DESCRIPTION The SP6123 is a fixed frequency, voltage mode, synchronous PWM controller designed to work from a single 5V or 3.
3V input supply, providing excellent AC and DC regulation for high efficiency power conversion.
Requiring only few external components, the SP6123 packaged in an 8-pin NSOIC, is especially suited for low voltage applications where cost, small size and high efficiency are critical.
The operating frequency is internally set to 300kHz (SP6123) or 500kHz (SP6123A), allowing small inductor values and minimizing PC board space.
The SP6123 drives an all N-channel synchronous power MOSFET stage for improved efficiency and includes an accurate 0.
8V reference for low output voltage applications.
TYPICAL APPLICATION CIRCUIT 3V to 5.
5V IN MBR0530 VIN CB 2.
2µF GL VCC GND COMP BST GH CBST 1µ F FDS6890A L1 VOUT 1.
5µH R1 10k CP 56pF RZ 15k CC 4.
7nF FDS6890A STPS2L25U R2 10k COUT1 470µF COUT2 470µF COUT3 1µ F CIN 680µF SP6123A SWN VFB 0.
8V to 5.
0V 2A to 10A (1.
6V, 4A shown) Date: 5/25/04 SP6123 Low Voltage, Synchronous Step Down PWM Controller © Copyright 2004 Sipex Corporation 1 ABSOL...


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