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ON Semiconductor - Precise Low Voltage Synchronous Buck Controller

Numéro de référence NCP81230H
Description Precise Low Voltage Synchronous Buck Controller
Fabricant ON Semiconductor 
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NCP81230H fiche technique
NCP81230H
Product Preview
Precise Low Voltage
Synchronous Buck
Controller with Power
Saving Mode
http://onsemi.com
The NCP81230H is a simple single phase solution with differential
phase current sensing, power saving operation, and gate drivers to
provide accurately regulated power.
The adaptive non overlap gate drive and power saving operation
circuit provide a low switching loss and high efficiency solution for
server, notebook, and desktop systems. A high performance
operational error amplifier is provided to simplify compensation of the
system. The NCP81230H features also include soft−start sequence,
accurate overvoltage and over current protection, UVLO for VCC and
VCCP, and thermal shutdown.
Features
High Performance Operational Error Amplifier
Internal Soft−Start/Stop
±0.5% Internal Voltage Accuracy, 0.8 V voltage reference
OCP accuracy, Four Re−entry Times Before Latch
“Lossless” Differential Inductor Current Sensing
Internal High Precision Current Sensing Amplifier
Oscillator Frequency Range of 100 kHz − 1000 kHz
20 ns Adaptive FET Non−overlap Time of Internal Gate Driver
5.0 V to 12 V Operation
Support 1.5 V to 19 V Vin
Vout from 0.8 V to 3.3 V (5 V with 12 VCC)
Chip Enable through OSC pin
Latched Over Voltage Protection (OVP)
Internally Fixed OCP Threshold
Guaranteed Startup Into Pre−Charged Loads
Thermally Compensated Current Monitoring
Thermal Shutdown Protection
Integrated MOSFET Drivers
Integrated BOOST Diode with internal Rbst = 2.2 W
Automatic Power Saving Mode to Maximize Efficiency During Light
Load Operation
Sync Function
Remote Ground Sensing
This is a Pb−Free Device
Applications
Desktop and Server Systems
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
MARKING
DIAGRAMS
QFN16
XXXX
CASE 485G
ALYWG
1G
XXXX
A
L
Y
W
G
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(*Note: Microdot may be in either location)
PIN CONNECTIONS
16 15 14 13
VCCP 1
LG 2
LX 3
BOOT 4
12 CSN/VO
11 FBG
10 VSEN
9 FB
5678
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
NCP81230HMNTWG QFN16 3000 / Tape &
(Pb−Free)
Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2014
September, 2014 − Rev. P1
1
Publication Order Number:
NCP81230H/D

PagesPages 12
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