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CS51031YDR8 Fiches technique(PDF) 1 Page - ON Semiconductor

No de pièce CS51031YDR8
Description  Fast PFET Buck Controller
Download  12 Pages
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Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS51031YDR8 Fiches technique(HTML) 1 Page - ON Semiconductor

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© Semiconductor Components Industries, LLC, 2002
December, 2001 – Rev. 9
1
Publication Order Number:
CS51031/D
CS51031
Fast PFET 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 start up. The short
circuit protection timer significantly reduces the duty cycle to
approximately 1/30 of its cycle during short circuit conditions.
The CS51031 is available in an 8 Lead SO plastic package.
Features
1.0 A Totem Pole Output Driver
High Speed Oscillator (700 kHz max)
No Stability Compensation Required
Lossless Short Circuit Protection
V
CC 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
VGATE
PGND
COSC
GND
VC
CS
VCC
VFB
RVCC
100
CVCC
0.1
µF
CS
0.1
µF
COSC
470 pF
VGATE
RA
1.5 k
RB
2.5 k
CRR
0.1
µF
CO
100
µF × 2
VO
3.3 V @ 3 A
L
4.7
µH
MBRS360
D1
5.0 V–12 V
CIN
47
µF
MP1
IRF7416
Figure 1. Typical Application Diagram
95 Units/Rail
PIN CONNECTIONS
A
= Assembly Location
WL, L
= Wafer Lot
YY, Y
= Year
WW, W = Work Week
SO–8
D SUFFIX
CASE 751
1
8
1
51031
ALYW
8
MARKING
DIAGRAM
VFB
GND
VCC
COSC
CS
PGND
VC
VGATE
1
Device
Package
Shipping
ORDERING INFORMATION*
CS51031YD8
SO–8
95 Units/Rail
CS51031YDR8
2500 Tape & Reel
CS51031GD8
CS51031GDR8
2500 Tape & Reel
SO–8
SO–8
SO–8
*Additional ordering information can be found on
page 9 of this data sheet.
http://onsemi.com


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