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SP6122ACU-1.5 Datasheet

  • SP6122ACU-1.5

  • Low Voltage, Micro 8, PFET, Buck Controller Ideal for 1A to ...

  • 131.13KB

  • 19頁

  • SIPEX

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廬
SP6122
Low Voltage, Micro 8, PFET, Buck Controller
Ideal for 1A to 5A, Small Footprint, DC-DC Power Converters
FEATURES
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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 5碌A(chǔ) Sleep Mode Quiescent Current
Low 300碌A(chǔ) Protected Mode Quiescent Current
Ultra Low, 150碌A(chǔ) Unprotected Mode Quiescent
Current
High Light Load Efficiency
V
CC
1
FFLAG 2
V
OUT
3
ENABLE 4
8 PDRV
SP6122
8 Pin
碌SOIC
7 GND
6 I
SET
5 I
SENSE
APPLICATIONS
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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 鈥渕icro鈥?/div>
parts, the
SP6122
has an array of value added features like optional hiccup mode, over
current protection, TTL enable, 鈥渏itter and frequency stabilization鈥?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.
TYPICAL APPLICATION CIRCUIT
R1
C1
4.7碌F
V
CC
V
IN
C2
100碌F
PDRV
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3.0V to 7.0V
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R
SET
1k
Q1
PDS6375
FFLAG
FFLAG
V
OUT
GND
SP6122
I
SET
I
SENSE
ENABLE
ENABLE
L1
2.2碌H
STPS2L25U
DFLY
1A to 5A
V
OUT
C
OUT
470碌F
Rev. 7/16/03
SP6122 Low Voltage, Micro 8, PFET, Buck Controller
漏 Copyright 2003 Sipex Corporation
1

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