SP6123ACN Sipex Corporation, SP6123ACN Datasheet
SP6123ACN
Manufacturer Part Number
SP6123ACN
Description
Manufacturer
Sipex Corporation
Specifications of SP6123ACN
Date_code
04
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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 pack-
aged 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.
Date: 5/25/04
Low Voltage, Synchronous Step-Down PWM Controller
Optimized for Single Supply, 3V - 5.5V Applications
High Efficiency: Greater Than 95% Possible
Accurate Fixed 300kHz (SP6123) or 500kHz
(SP6123A) Frequency Operation
Fast Transient Response
Internal Soft Start Circuit
Accurate 0.8V Reference Allows Low Output
Voltages
Resistor Programmable Output Voltage
Loss-less Current Limit with High Side R
Sensing
Hiccup Mode Current Limit Protection
Dual N-Channel MOSFET Synchronous Driver
Quiescent Current: 500µA, 30µA in Shutdown
8-Pin Surface Mount Package
V
IN
CB
2.2µF
CP
56pF
®
RZ
15k
CC
4.7nF
Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters
SP6123 Low Voltage, Synchronous Step Down PWM Controller
GL
V
GND
COMP
CC
SP6123A
SWN
BST
V
GH
FB
CBST
1µF
MBR0530
DS(ON)
1
FDS6890A
FDS6890A
Now Available in Lead Free Packaging
1.5µH
L1
TYPICAL APPLICATION CIRCUIT
STPS2L25U
COMP
GND
SP6123/SP6123A
V
GL
CC
APPLICATIONS
C
680µF
IN
1
2
3
4
DSP
Microprocessor Core
I/O & Logic
Industrial Control
Distributed Power
Low Voltage Power
R2
10k
R1
10k
3V to 5.5V
C
470µF
IN
OUT1
8 Pin NSOIC
SP6123
© Copyright 2004 Sipex Corporation
C
470µF
OUT2
DESCRIPTION
(1.6V, 4A shown)
0.8V to 5.0V
2A to 10A
C
1µF
OUT3
V
OUT
8
7
6
5
BST
GH
SWN
V
FB
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