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SP6122

Sipex
Part Number SP6122
Manufacturer Sipex
Description Low Voltage Buck Controller
Published Jun 7, 2005
Detailed Description ® SP6122 Low Voltage, Micro 8, PFET, Buck Controller Ideal for 1A to 5A, Small Footprint, DC-DC Power Converters ■ Op...
Datasheet PDF File SP6122 PDF File

SP6122
SP6122

Overview
® SP6122 Low Voltage, Micro 8, PFET, Buck Controller Ideal for 1A to 5A, Small Footprint, DC-DC Power Converters ■ Optimized for Single Supply, 3V-5.
5V Applications ■ High Efficiency, Greater than 90% Possible ■ 20ns/1nF PFET Output Driver ■ Fast Transient Response ■ Open Drain Fault Output Pin VCC 1 FFLAG 2 VOUT 3 SP6122 8 Pin MSOP 8 PDRV 7 GND 6 ISET ■ Internal Soft Start Circuit ■ Accurate 1.
5% Reference ENABLE 4 5 ISENSE ■ Programmable Output Voltage or Fixed 1.
5V Output ■ Loss-less Adjustable Current Limit with High side Now Available in Lead Free Packaging RDS(ON) Sensing ■ Hiccup or Lock-up Fault Modes ■ Low 5µA Sleep Mode Quiescent Current ■ Low 300µA Protected Mode Quiescent Current ■ Ultra Low, 150µA Unprotected Mode Quiescent Current ■ High Light Load Efficiency ■ Offered in Tiny 8 pin MSOP Package APPLICATIONS ■ Video Cards ■ High Power Portable ■ Microcontrollers ■ I/O & Logic ■ Industrial Control ■ Distributed Power ■ Low Voltage Power DESCRIPTION The SP6122 is a PWM/PFM minimum on-time controller designed to work from a single 3V5.
5V input supply.
It is engineered specifically for size and minimum component count, simplifying the transition from a linear regulator to a switcher solution.
However, unlike other “micro” parts, the SP6122 has an array of value added features such as optional hiccup mode, over current protection, TTL enable, “jitter and frequency stabilization” and a fault flag pull-down pin.
Combined with reference and driver specifications usually found on more expensive integrated circuits, the SP6122 delivers great performance and value in an 8 pin MSOP package.
TYPICAL APPLICATION CIRCUIT R1 VIN 3.
0V to 7.
0V C1 4.
7µF FFLAG ENABLE 5Ω C2 100µF VCC FFLAG VOUT PDRV ® GND SP6122 ISET ENABLE ISENSE RSET 1k STPS2L25U Q1 PDS6375 L1 2.
2µH DFLY 1A to 5A VOUT COUT 470µF Date: 10/02/04 SP6122 Low Voltage, Micro 8, PFET, Buck Controller 1 © Copyright 2004 Sipex Corporation ABSOLUTE MAXIMUM RATINGS These are...


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