NCP1512 Datasheet, PDF (1/12 Pages) ON Semiconductor – PWM Buck Converter

NCP1512
Advance Information
PWM Buck Converter with a
Very Low Iq During Low
Load Conditions
The NCP1512 is a tri-mode regulator that operates either as a
Synchronized PWM Buck Converter, PWM Buck Converter with
internal oscillator or as a Pulsed Switching Regulator. If a
synchronization signal is present, the NCP1512 operates as a current
mode PWM converter with synchronous rectification. The optional
external frequency input signal allows the user to control the location
of the spurious frequency noise generated by a PWM converter. The
Pulsed Switching Regulator mode is active when the Sync Pin is
Low. The Pulsed Mode is an extremely low quiescent current Buck
Converter. NCP1512 operates in a PWM mode with an internal
oscillator when the Sync Pin is held high. The NCP1512
configuration allows the flexibility of efficient high power operation
and low input current during system sleep modes.
Features
• Synchronous Rectification for Higher Efficiency in PWM Mode
• Pulsed Switching Mode Operation for Low Current Consumption at
Low Loads
• Integrated MOSFETs and Feedback Circuits
• Cycle -by-Cycle Current Limit
• Automatic Switching Between PWM, with External or Internal
Oscillator, and Pulsed Mode
• Operating Frequency Range of 450 to 1000 kHz
• Internal 1.0 MHz Oscillator
• Thermal Limit Protection
• Built -in Slope Compensation for Current Mode PWM Converter
• 2.5, 2.85, 3.0, 3.3 Fixed Output Voltages
• Shutdown Current Consumption of 0.2 mA
• Pb Free Package for Green Manufacturing
Applications
• Cellular Phones and Pagers
• PDA
• Digital Cameras
• Supplies for DSP Cores
• Portable Applications
This document contains information on a new product. Specifications and information
herein are subject to change without notice.
http://onsemi.com
MARKING
DIAGRAM
9 PIN
MICRO BUMP
FC SUFFIX
CASE 499E
XXXX
YYWW
1
XX = Device Code
YY = Year
WW = Work Week
PIN CONNECTIONS
Pin: A1. - GNDP
A1
B1
C1
A2. - LX
A3. - VCC
B1. - SYNC
A2
B2
C2
B2. - GNDA
B3. - FB
C1. - SHD
A3
B3
C3
C2. - CB1
C3. - CB0
(Bottom View)
ORDERING INFORMATION
Device
Package
Shipping
NCP1512FCT1G 9 Pin Pb Free
Micro Bump
TBD
© Semiconductor Components Industries, LLC, 2003
1
June, 2003 - Rev. 0
Publication Order Number:
NCP1512/D