RT9055 Datasheet, PDF (1/9 Pages) Richtek Technology Corporation – 300mA Dual LDO Regulator

®
RT9055
300mA Dual LDO Regulator
General Description
The RT9055 is a dual channel, low noise, and low dropout
regulator sourcing up to 300mA at each channel. The output
voltage range is from 0.9V to 3.5V with an input voltage
range from 1.5V to 5.5V.
The RT9055 offers 2% accuracy, extremely low dropout
voltage and extremely low quiescent current (only 29μA
per LDO). The shutdown current is near zero which is
suitable for battery powered applications. The RT9055 also
provides protection functions such as current limiting,
output short circuit protection, and over temperature
protection.
The RT9055 allows stable operation with very small
ceramic output capacitors, hence minimizing required
board space and component cost.
The RT9055 is available in a WL-CSP-6B 0.8x1.2 package.
Ordering Information
RT9055-
Package Type
WSC : WL-CSP-6B 0.8x1.2
Note :
Output Voltage : VOUT1/VOUT2
VOUT2 > VOUT1 is Recommended
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.
Features
z Wide Operating Voltage Range : 1.5V to 5.5V
z Low Noise for RF Application
z No Noise Bypass Capacitor Required
z Fast Response in Line/Load Transient
z TTL Logic Controlled Shutdown Input
z Low Temperature Coefficient
z Dual LDO Outputs (300mA/300mA)
z Ultra-Low Quiescent Current : 29μA/LDO
z High Output Accuracy 2%
z Short Current Protection
z Thermal Shutdown Protection
z Current Limit Protection
z Short Circuit Thermal Folded Back Protection
z RoHS Compliant and Halogen Free
Applications
z Cellular Handsets
z Battery Powered Equipment
z Hand-Held Instruments
z Portable Information Appliances
Pin Configurations
(TOP VIEW)
EN1 A1 A2 VOUT1
GND B1 B2 VIN
EN2 C1 C2 VOUT2
WSC-CSP-6B 0.8x1.2
Available Voltage Version
Code Voltage Code Voltage Code Voltage
A
3.5
B
1.3
C
1.2
D
1.85
E
2.1
F
1.5
G
1.8
H
2
J
2.5
K
2.6
L
2.7
M
2.8
N
2.85
P
3
Q
3.1
R
3.2
S
3.3
T
2.65
V
2.9
W
1.6
X
3.15
Y
1.9
U
1.4
Z
1.25
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS9055-00 March 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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