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SP6122 Datasheet(PDF) 1 Page - Sipex Corporation

Part No. SP6122
Description  Low Voltage, Micro 8, PFET, Buck Controller Ideal for 1A to 5A, Small Footprint, DC-DC Power Converters
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Maker  SIPEX [Sipex Corporation]
Homepage  http://www.sipex.com
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1
Rev. 7/16/03
SP6122 Low Voltage, Micro 8, PFET, Buck Controller
© Copyright 2003 Sipex Corporation
SP6122
■ Optimized for Single Supply, 3V - 5.5V Applications
■ High Efficiency, Greater than 90% Possible
■ Small Micro 8 Package
■ 20ns/1nF PFET Output Driver
■ Fast Transient Response
■ Open Drain Fault Output Pin
■ Internal Soft Start Circuit
■ Accurate 1.5% Reference
■ Programmable Output Voltage or Fixed 1.5V Output
■ Loss-less Adjustable Current Limit with High side
R
DS(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
Low Voltage, Micro 8, PFET, Buck Controller
Ideal for 1A to 5A, Small Footprint, DC-DC Power Converters
APPLICATIONS
■ Video Cards
■ High Power Portable
■ Microcontrollers
■ I/O & Logic
■ Industrial Control
■ Distributed Power
■ Low Voltage Power
DESCRIPTION
The SP6122 is a PFM minimum on-time controller designed to work from a single 5V or 3.3V
input supply. It is engineered specifically for size and minimum components 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 like 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 a micro 8 package.
®
1
2
3
4
5
6
7
8
ENABLE
VOUT
FFLAG
PDRV
GND
ISET
ISENSE
VCC
SP6122
8 Pin µSOIC
SP6122
VCC
FFLAG
VOUT
ENABLE
PDRV
GND
ISET
ISENSE
FFLAG
VOUT
RSET
1k
DFLY
Q1
PDS6375
ENABLE
C1
4.7µF
VIN
3.0V to 7.0V
L1
2.2µH
COUT
470µF
1A to 5A
®
®
R1
5Ω
C2
100µF
STPS2L25U
FEATURES
TYPICAL APPLICATION CIRCUIT




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