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SP6122 Datasheet(PDF) 5 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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 5 page
background image
5
Rev. 7/16/03
SP6122 Low Voltage, Micro 8, PFET, Buck Controller
Ā© Copyright 2003 Sipex Corporation
BLOCK DIAGRAM
+
-
-
+
-
+
-
+
PFET
Driver
Driver
Logic
S
Q
R
Reset
Dominant
S
Q
R
200ns Blanking
One Shot
ENABLE
ISET
VOUT
ISENSE
Reference
5
4
3
6
SS
1.25V
Reference
Comparator
1V
FFLAG
2
7
GND
8
1
PFET OFF
RESET
Dominant
PFET OFF
FAULT
+
-
X 3.3
500mV
(3800 ppm/Ā°C)
PDRV
TON
Min On Time Clock
PDRV
VCC
Loop
Latch
QB
VOUT * K1
Soft Start Clock
S
Q
R
Run
Latch
QB
S
R
SS
Latch
QB
Reset
Dominant
Start On Time
Soft Start
Reset
Dominant
POR
X K1
Over Current
(Gated S&H)
POR
ISET < 1V
Low IQ
ISET
ISENSE
POR
Blank
20ĀµA
(4300 ppm/Ā°C)




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