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RT9055-CFWSC

P1-P3P4-P6P7-P9
RT9055
®
DS9055-02 August 2014 www.richtek.com
1
Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
©
300mA Dual LDO Regulator
Ordering Information
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.
Applications
Cellular Handsets
Battery Powered Equipment
Hand-Held Instruments
Portable Information Appliances
Pin Configurations
(TOP VIEW)
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.
Features
Wide Operating Voltage Range : 1.5V 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 : 29
μμ
μμ
μA/LDO
High Output Accuracy 2%
Short Current Protection
Thermal Shutdown Protection
Current Limit Protection
Short Circuit Thermal Folded Back Protection
RoHS Compliant and Halogen Free
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
2 1.1 3 1
VIN
VOUT2EN2
EN1
VOUT1
GND
B2
C2C1
A1 A2
B1
RT9055-
Package Type
WSC : WL-CSP-6B 0.8x1.2
Output Voltage : VOUT1/VOUT2
VOUT2 > VOUT1 is Recommended
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
RT9055
2
DS9055-02 August 2014www.richtek.com
©
Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Functional Pin Description
Function Block Diagram
Typical Application Circuit
RT9055
GND
VIN
V
IN
1µF
C
IN
VOUT2
V
OUT2
EN1
EN2
Chip Enable
VOUT1
V
OUT1
C
OUT1
1µF
B2
A1
C1
B1
C2
A2
C
OUT2
1µF
Pin No. Pin Name Pin Function
A1 EN1 LDO1 Enable (Active High).
A2 VOUT1 LDO1 Output Voltage.
B1 GND Ground.
B2 VIN Supply Input.
C1 EN2 LDO2 Enable (Active High).
C2 VOUT2 LDO2 Output Voltage.
EN1
Current Limit
and
Thermal Protection
Output
Driver
+
-
VOUT1
Shutdown
and
Logic Control
VIN
V
REF
EN2
Current Limit
and
Thermal Protection
Output
Driver
+
-
VOUT2
Shutdown
and
Logic Control
V
REF
GND
13µA
13µA
RT9055
3
DS9055-02 August 2014 www.richtek.com
©
Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Absolute Maximum Ratings (Note 1)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------- −0.3V to 6V
Other I/O Pins Voltages ------------------------------------------------------------------------------------------------- −0.3V to 6V
Power Dissipation, P
D
@ T
A
= 25°C
WL-CSP-6B 0.8x1.2 ------------------------------------------------------------------------------------------------------ 0.670W
Package Thermal Resistance (Note 2)
WL-CSP-6B 0.8x1.2, θ
JA
------------------------------------------------------------------------------------------------ 148°C/W
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Model) ----------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------- 1.5V to 5.5V
Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(V
IN
= V
OUT
+ 1V, C
IN
= C
OUT
= 1μF, T
A
= −40°C to 85°C, unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Input Power Supply
V
OUT
= 1.2V to 1.4V, I
OUT
= 300mA 50 -- 550
V
OUT
= 1.5V to 2.4V, I
OUT
= 300mA 40 -- 400 Dropout Voltage (Note 5) V
DROP
V
OUT
= 2.5V to 3.5V, I
OUT
= 300mA 20 -- 300
mV
Output Voltage Range V
OUT
0.9 -- 3.5 V
V
OUT
Accuracy V I
OUT
= 1mA to 300mA 2 -- 2 %
Line Regulation V
LINE
V
IN
= (V
OUT
+ 1) to 5.5V, I
OUT
= 1mA 2 -- 2 %
Load Regulation V
LOAD
1mA < I
OUT
< 300mA 1.5 -- 1.5 %
Current Limit I
LIM
R
LOAD
= 0 350 600 -- mA
Quiescent Current I
Q
V
EN
> 1.5V -- 58 -- A
Shutdown Current I
SHDN
V
EN
< 0.4V -- -- 1 A
Logic-High V
IH
V
IN
= 2.5V to 5.5V, Power On 1.2 -- --
EN Input
Threshold
Vol ta ge
Logic-Low V
IL
V
IN
= 2.5V to 5.5V, Shutdown -- -- 0.4
V
V
OUT
Discharge Resistance
in Shutdown (Note 6)
V
IN
= 5V, EN1 = EN2 = GND -- 3 -- k
EN Pull Low Current I
EN
8 13 18 A
Thermal Shutdown T
SD
-- 170 -- °C
Thermal Shutdown
Hysteresis
T
SD
-- 40 -- °C
P1-P3P4-P6P7-P9

RT9055-CFWSC

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Description:
IC REG LINEAR 1.2V/1.5V 6WLCSP
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