RT9287 Datasheet, PDF (1/13 Pages) Richtek Technology Corporation – Boost Converter for OLED Power with Dual LDO

Preliminary
RT9287
Boost Converter for OLED Power with Dual LDO
General Description
The RT9287 integrates a boost converter for OLED power
and a Dual LDO for camera image sensor power. To achieve
high efficiency, the boost converter optimizes its operating
frequency for small LC filters value and reduces the
operating current. Moreover, the internal soft-start function
reduces the inrush current.
For the Dual LDO part, it possesses functions of 2%
accuracy, dual channel, low dropout voltage
(240mV@300mA), low noise, low ground current and
low dropout regulator sourcing up to 300mA at each
channel. For battery-powered devices, it provides near
zero shutdown current. Moreover, it also integrates
functions such as current limiting, over temperature, output
short circuit, 27μA low ground current per LDO and
short circuit thermal folded back protection. When output
short circuit occurs, the RT9287 reduces its over
temperature protection trip point to provide maximum
safety to users. The RT9287 is available in WDFN-10L
3x3 package.
Ordering Information
RT9287-
Package Type
QW : WDFN-10L 3x3 (W-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
LDO Output Voltage : VOUT1/VOUT2
MG : 2.80V/1.80V
Note :
Richtek Pb-free and Green 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.
`100% matte tin (Sn) plating.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
DS9287-01 August 2007
Features
z Boost Converter
`VIN Operating Range : 2.7V to 5.5V
`Maximum Output Voltage Up to 20V
`Output Current up to 100mA at V_OUT = 12V.
`Low Shutdown Supply Current
`Minimize the External Component
`Small LC Filter
`Internal Soft Start
z Dual LDO
`Wide Operating Voltage Ranges : 2.7V to 5.5V
`Low-Noise for RF Application
`No Noise Bypass Capacitor Required
`Fast Response in Line/Load Transient
`TTL-Logic-Controlled Shutdown Input
`Low Temperature Coefficient
`Dual LDO Outputs (300mA/300mA)
`Ultra-low Quiescent Current 27μA/LDO
`High Output Accuracy 2%
`Short Circuit Protection
`Thermal Shutdown Protection
`Current Limit Protection
`Short Circuit Thermal Folded Back Protection
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Camera Phone
z OLED Power
Pin Configurations
(TOP VIEW)
VDD1 1
EN1 2
EN2 3
ENB 4
FB 5
GND
11
10 VLDO1
9 VLDO2
8 GND
7 VDD2
LX
WDFN-10L 3x3
www.richtek.com
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