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CS51031YD8G Datasheet(PDF) 1 Page - ON Semiconductor

Part # CS51031YD8G
Description  Fast P?묬h FET Buck Controller
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS51031YD8G Datasheet(HTML) 1 Page - ON Semiconductor

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VGATE
PGND
COSC
GND
VC
CS
VCC
VFB
RVCC
100
W
CVCC
0.1
mF
CS
0.1
mF
COSC
470 pF
VGATE
RA
1.5 k
W
RB
2.5 k
W
CRR
0.1
mF
CO
100
mF × 2
VO
3.3 V @ 3 A
L
4.7
mH
MBRS360
D1
5.0 V−12 V
CIN
47
mF
MP1
IRF7416
Figure 1. Typical Application Diagram
© Semiconductor Components Industries, LLC, 2005
October, 2005 − Rev. 11
1
Publication Order Number:
CS51031/D
CS51031
Fast P−Ch FET
Buck Controller
The CS51031 is a switching controller for use in DC−DC
converters. It can be used in the buck topology with a minimum
number of external components. The CS51031 consists of a VCC
monitor for controlling the state of the device, 1.0 A power driver for
controlling the gate of a discrete P−Channel transistor, fixed frequency
oscillator, short circuit protection timer, programmable Soft−Start,
precision reference, fast output voltage monitoring comparator, and
output stage driver logic with latch.
The high frequency oscillator allows the use of small inductors and
output capacitors, minimizing PC board area and systems cost. The
programmable Soft−Start reduces current surges at startup. The short
circuit protection timer significantly reduces the duty cycle to
approximately 1/30 of its cycle during short circuit conditions.
Features
1.0 A Totem Pole Output Driver
High Speed Oscillator (700 kHz max)
No Stability Compensation Required
Lossless Short Circuit Protection
VCC Monitor
2.0% Precision Reference
Programmable Soft−Start
Wide Ambient Temperature Range:
Industrial Grade: −40
°C to 85°C
Commercial Grade: 0
°C to 70°C
Pb−Free Packages are Available
PIN CONNECTIONS
51031 = Device Code
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
x
= Continuation of Device Code
x = Y or G
G
= Pb−Free Package
SOIC−8
D SUFFIX
CASE 751
1
8
MARKING DIAGRAM
VFB
GND
VCC
COSC
CS
PGND
VC
VGATE
1
http://onsemi.com
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
ORDERING INFORMATION
51031
ALYWx
G
1
8


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