RT9043GB Datasheet, PDF (1/8 Pages) Richtek Technology Corporation – Adjustable Output Voltage, Enable/Shutdown Control

RT9043
High PSRR, Low Dropout, 400mA Adjustable LDO Regulator
General Description
The RT9043 is a high-performance, 400mA LDO regulator,
offering high PSRR and low dropout. The quiescent current
is as low as 35μA, further prolonging the battery life. The
RT9043 also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications, critical in handheld wireless devices.
The RT9043 consumes typical 0.7μA in shutdown mode.
The other features include low dropout voltage, high output
accuracy, current limit protection, and enable/shutdown
control. The RT9043 is available in the SOT-23-5 package.
Ordering Information
RT9043-
Package Type
B : SOT-23-5
Lead Plating System
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.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Typical Application Circuit
Features
z Adjustable Output Voltage
z Enable/Shutdown Control
z Wide Operating Voltage Range : 2.2V to 5.5V
z Low Dropout : 230mV at 400mA
z Low-Noise for RF Application
z Ultra-Fast Response in Line/Load Transient
z Current Limit Protection
z High Power Supply Rejection Ratio
z Output Only 1μF Capacitor Required for Stability
z RoHS Compliant and Halogen Free
Applications
z Mega SIM Card
z CDMA/GSM Cellular Handsets
z Portable Information Appliances
z Laptop, Palmtops, Notebook Computers
z Hand-Held Instruments
z Mini PCI & PCI-Express Cards
z PCMCIA & New Cards
Pin Configurations
(TOP VIEW)
VOUT
FB
5
4
2
3
VIN GND EN
SOT-23-5
V_IN
Chip Enable
1 _VIN
VOUT ⁵
C_IN
RT9043
1µF
3 _EN
R3
10k
FB ⁴
GND ²
C_OUT
1µF
V_OUT
R1
R2
DS9043-02 April 2011
www.richtek.com
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