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RT9278PQV

Description
High Efficiency Boost LDO Converter & High Power White LED Driver
File Size400KB,13 Pages
ManufacturerRichtek Technology Corporation
Websitehttps://www.richtek.com/
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RT9278PQV Overview

High Efficiency Boost LDO Converter & High Power White LED Driver

®
RT9278
High Efficiency Boost LDO Converter & High Power White
LED Driver
General Description
The RT9278 is a compact, high
efficiency,
synchronous
step-up converter, it provides a power supply solution for
products powered by either two-cell, three-cell Alkaline/
NiMH or one-cell Li-Ion/Li-polymer battery.
The RT9278 is boost converter with PWM control loop,
provide up to 95% efficiency by using a synchronous
rectifier. The maximum peak current in the internal switch
is limited to up to 2A.
It keeps the output voltage regulated when the input
voltage exceeds the setting output voltage. The output
voltage can be set by an external resister divider, or be
fixed to reduce external components. It integrates a linear
controller for linear regulator.
RT9278 is available in VDFN-10L 3x3 package.
Features
95% Efficiency Synchronous Boost Converter
High Supply Capability
2A Current Limit
Input Voltage Range : 1.5V to 5.5V
600kHz Fixed Switching Rate
Adjustable Output Voltage Options Up to 5.5V
Output Voltage Keep Regulated when Input Voltage
Exceed Setting Output Voltage
1uA Supply Current in Shutdown Mode
External Compensation Network
Build in Linear Controller for Linear Regulator
Over Temperature Protection
Small 10-Lead VDFN Package
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Ordering Information
RT9278
Package Type
QV : VDFN-10L 3x3 (V-Type)
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
RT9278QQV
Digital Still Camera
Camera White LED Flash Light
PDAs
Portable Device
Marking Information
RT9278PQV
AC- : Product Code
AC-YM
DNN
YMDNN : Date Code
Pin Configurations
(TOP VIEW)
FB
COMP
GND
EN
LX
1
2
3
4
5
11
10
9
AC= : Product Code
AC=YM
DNN
LFB
LDRI
PGND
VDD
VOUT
YMDNN : Date Code
GND
8
7
9
VDFN-10L 3x3
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS9278-07 January 2012
www.richtek.com
1

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