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ON Semiconductor - High Frequency Synchronous Step Down PWM Controller

Numéro de référence NCP1581
Description High Frequency Synchronous Step Down PWM Controller
Fabricant ON Semiconductor 
Logo ON Semiconductor 





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NCP1581 fiche technique
NCP1581
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High Frequency Synchronous
Step Down PWM Controller
for Tracking Applications
The NCP1581 controller IC is designed to provide a simple
synchronous buck regulator for onboard DC to DC applications in a
14pin SOIC. The NCP1581 is designed specifically for tracking
applications by providing the track input.
The NCP1581 operates at a fixed internal 400 kHz switching
frequency allowing the use of small external components. The device
features a programmable soft start set by an external capacitor,
undervoltage lockout and output undervoltage detection that latches
off the device when an output short is detected.
Features
Power up Sequencing / Tracking
Enable Input
Internal 400 kHz Oscillator
Programmable SoftStart
Fixed Frequency Voltage Mode
Voltage Mode Adaptive Deadtime
This is a PbFree Device
Applications
Tracking Applications
Game Consoles
Computing Peripheral Voltage Regulators
Graphics Cards
General DC to DC Converters
http://onsemi.com
MARKING
SOIC14
DIAGRAM
14 D SUFFIX
1 CASE 751A
NCP1581G
A = Assembly Location
AWLYWW
WL = Wafer Lot
Y = Year
1
WW = Work Week
G = PbFree Package
PIN CONNECTIONS
1
FB
NC
VP SS
NC COMP
VCC
NC
NC VC
LDRV
HDRV
GND
PGND
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
NCP1581
Figure 1. Typical Application Circuit
© Semiconductor Components Industries, LLC, 2010
January, 2010 Rev. 0
1
Publication Order Number:
NCP1581/D

PagesPages 14
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