CS51033GD8G ON Semiconductor, CS51033GD8G Datasheet

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CS51033GD8G

Manufacturer Part Number
CS51033GD8G
Description
IC CTRLR PFET BUCK FAST 8-SOIC
Manufacturer
ON Semiconductor
Type
Step-Down (Buck)r
Datasheet

Specifications of CS51033GD8G

Internal Switch(s)
No
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
1.5V
Current - Output
200mA
Frequency - Switching
200kHz
Voltage - Input
3.14 ~ 3.47 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
CS51033GD8G
Manufacturer:
ON/安森美
Quantity:
20 000
CS51033
Fast P−Ch FET Buck
Controller
converters. It can be used in the buck topology with a minimum
number of external components. The CS51033 consists of a 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.
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 P−Ch FET duty cycle
to approximately 1/30 of its normal cycle during short circuit
conditions.
Features
© Semiconductor Components Industries, LLC, 2005
October, 2005 − Rev. 10
The CS51033 is a switching controller for use in DC−DC
The high frequency oscillator allows the use of small inductors and
1.0 A Totem Pole Output Driver
High Speed Oscillator (700 kHz max)
No Stability Compensation Required
Lossless Short Circuit Protection
2.0% Precision Reference
Programmable Soft−Start
Wide Ambient Temperature Range:
Pb−Free Packages are Available
Industrial Grade: −40°C to 85°C
Commercial Grade: 0°C to 70°C
1
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
51033 = Device Code
A
L
Y
W
x
G
ORDERING INFORMATION
PGND
V
C
GND
GATE
MARKING DIAGRAM
OSC
PIN CONNECTIONS
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Continuation of Device Code
= Pb−Free Package
http://onsemi.com
x = Y or G
1
8
1
CASE 751
D SUFFIX
8
SOIC−8
ALYWx
51033
Publication Order Number:
G
1
V
V
V
CS
CC
FB
C
CS51033/D

Related parts for CS51033GD8G

CS51033GD8G Summary of contents

Page 1

CS51033 Fast P−Ch FET Buck Controller The CS51033 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 CS51033 consists of a 1.0 A power ...

Page 2

100 1N5818 OSC 100 mF 1.0 mF 150 pF GND Note: Capacitors and C , are low ...

Page 3

V ELECTRICAL CHARACTERISTICS Industrial Grade: −40°C < T < 85°C; −40°C < Characteristic Oscillator V FB Frequency C Charge Current 1.4 V < V Discharge Current 2.7 V > V Maximum Duty Cycle ...

Page 4

PACKAGE PIN DESCRIPTION Pin Number Pin Symbol 1 V GATE 2 PGND 3 C OSC 4 GND OSC 1.5 V − ...

Page 5

THEORY OF OPERATION Control Scheme The CS51033 monitors the output voltage to determine when to turn on the P−Ch FET falls below the internal FB reference voltage of 1.25 V during the oscillator’s charge cycle, the P−Ch FET ...

Page 6

Buck Regulator Operation A block diagram of a typical buck regulator is shown in Figure assume that the output transistor is initially off, and the system is in discontinuous operation, the inductor current I is zero and ...

Page 7

DESIGNING A POWER SUPPLY WITH THE CS51033 Specifications • = 3.3 V ±10% (i.e. 3.63 V max., 2.97 V min • = 1.5 V ±2.0% V OUT • 0 3.0 A OUT • Output ...

Page 8

Divider Bypass Capacitor C RR Since the feedback resistors divide the output voltage by a factor of 4.0, i.e. 5.0 V/1.25 V= 4.0, it follows that the output ripple is also divided by four. This would require that the ...

Page 9

... ORDERING INFORMATION Device CS51033YD8 CS51033YD8G CS51033YDR8 CS51033YDR8G CS51033GD8 CS51033GD8G CS51033GDR8 CS51033GDR8G †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. CS51033 maximum output current. The breakdown voltage should be at least 20 V for this 12 V application ...

Page 10

... *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “ ...

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