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SP6123 Datasheet(PDF) 7 Page - Sipex Corporation

Part # SP6123
Description  Low Voltage, Synchronous Step-Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters
PDF  18 Pages
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Manufacturer  SIPEX [Sipex Corporation]
Direct Link  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP6123 Datasheet(HTML) 7 Page - Sipex Corporation

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Date: 5/25/04
SP6123 Low Voltage, Synchronous Step Down PWM Controller
© Copyright 2004 Sipex Corporation
A more detailed description of the waveform is shown below.
Internal SSTART
passes V(VFB), COMP
pops to ~ internal
SSTART voltage +0.7V
Internal SSTART rises until
~ VCC-1V, then gives command
to attempt RESTART
COMP Clamps
~ 3V
After pop, COMP
retains internal
SSTART slope
ENABLE
Part
Attempt
RESTART
5µA PULLUP slope to 0.3V;
35µA PULLUP to 0.7V
Overcurrent Detected
GH Turns Off
(Fault Mode Enabled)
GH
COMP
SP6123 OVER CURRENT (HICCUP MODE)
Test Conditions
V
FB = 0.7V
V
CC = 5.0V
BST = 5.0V
SWN - tied to GND through 1k Resistor
COMP – released from GND
OPERATION



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