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SP6122_04 Datasheet

  • SP6122_04

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

  • 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
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Optimized for Single Supply, 3V-5.5V Applications
High Efficiency, Greater than 90% Possible
8
PDRV
VCC
1
20ns/1nF PFET Output Driver
SP6122
FFLAG
2
7
GND
8 Pin MSOP
Fast Transient Response
VOUT
3
6
ISET
Open Drain Fault Output Pin
ENABLE
4
5
ISENSE
Internal Soft Start Circuit
Accurate 1.5% Reference
Programmable Output Voltage or Fixed 1.5V Output
Now Available in Lead Free Packaging
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
APPLICATIONS
Low 300碌A(chǔ) Protected Mode Quiescent Current
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Video Cards
Ultra Low, 150碌A(chǔ) Unprotected Mode Quiescent
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High Power Portable
Current
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Microcontrollers
High Light Load Efficiency
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I/O & Logic
Offered in Tiny 8 pin MSOP Package
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Industrial Control
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Distributed Power
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Low Voltage Power
DESCRIPTION
The
SP6122
is a PWM/PFM minimum on-time controller designed to work from a single 3V-
5.5V 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
鈥渕icro鈥?parts, the
SP6122
has an array of value added features such as 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 an 8 pin
MSOP package.
TYPICAL APPLICATION CIRCUIT
R1
C1
4.7碌F
V
CC
V
IN
C2
100碌F
PDRV
廬
3.0V to 7.0V
5鈩?/div>
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
Date: 10/02/04
SP6122 Low Voltage, Micro 8, PFET, Buck Controller
漏 Copyright 2004 Sipex Corporation
1

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