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RS3236
Low Power, Low Dropout,
500mA RF Linear Regulators
FEATURES
Low Dropout Voltage
Thermal-Overload Protection
Output Current Limit
10nA Logic-Controlled Shutdown
20μA Low Supply Current
1.7V to 7.5V Input Voltage Range
500mA Output Current
-40° to +85° Operating Temperature Range
C
C
Available in Green UTDFN-1x1-4, SOT23-5，
SOT23-3, SOT353(SC70-5) and SOT89-3L
(L-Type) Package
DESCRIPTION
The RS3236 series low-power, low-dropout, CMOS
LDO operate from 1.7V to 7.5V input voltage that can
supply up to 500 mA of output current. Designed to
meet the requirements of RF and analog circuits, the
RS3236 series device provides low noise, high
PSRR, low quiescent current, and low line and load
transient response.
The device is designed to work with a 1-µF input and
a 1-µF output ceramic capacitor (no separate noise
bypass capacitor required). An external noise bypass
capacitor connected to the device’s BP pin can further
reduce the noise level.
Other features include a 10nA logic-controlled
shutdown mode, foldback current limit and thermal
shutdown protection.
The RS3236 series is available in Green UTDFN-1x1-
4, SOT23-3, SOT23-5, SOT353(SC70-5) and
SOT89-3L(L-Type) package. It operates over an
ambient temperature range of -40° to +85°
C
C.
APPLICATIONS
•
•
•
•
•
Cellular Telephones
Camera Modules
Modems
HiFi Audio Radio Transceivers
PLL/Synthesizer, Clocking
Medium-Current, Noise-Sensitive
Applications
•
Functional Block Diagram
IN
Current
Limit
OUT
IN
Current
Limit
OUT
V
REF
Error
amp
V
REF
Error
amp
Internal
Controller
Internal
Controller
Thermal
Shutdown
Thermal
Shutdown
EN
BP
EN
FB
GND
Copyright © 2017,
RUNIC Technology
GND
Copyright © 2017,
RUNIC Technology
REV B.5
1
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RS3236
Pin Configuration and Functions (Top View)
(TOP VIEW)
(TOP VIEW)
IN
GND
EN
1
2
3
5 OUT
4 BP/FB
UTDFN-1×1-4
SOT23-5/SOT353(SC70-5)
UTDFN-1×1-4
NUMBER
1
2
3
4
Thermal Pad
NAME
OUT
GND
EN
IN
-
I/O
O
G
I
I
-
Regulator Output.
Ground.
DESCRIPTION
Enable Input. A logic low reduces the supply current to 10nA. Connect to IN for
normal operation.
Regulator Input. Supply voltage can range from 1.7V to 7.5V. Bypass with a 1μF
capacitor to GND.
Connect the thermal pad to a large-area ground plane. This pad is not an electrical
connection to the device ground.
SOT23-5
/SOT353(SC70-5)
NUMBER
1
2
3
NAME
IN
GND
EN
BP
4
FB
5
OUT
I/O
DESCRIPTION
Regulator Input. Supply voltage can range from 1.7V to 7.5V. Bypass with a 1μF
capacitor to GND.
Ground.
Enable Input. A logic low reduces the supply current to 10nA. Connect to IN for
normal operation.
Reference-Noise Bypass (fixed voltage version only). Bypass with a low-leakage
0.01μF ceramic capacitor for reduced noise at the output. The capacitor is
recommended to be placed very close to the pin for high PSRR.
Feedback Pin (adjustable voltage version only). This is used to set the output voltage
of the device.
I
G
I
O
O
Regulator Output.
2
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RS3236
(TOP VIEW)
LBXX
SOT23-3
GND
1
3
VIN
VOUT
2
NOTE: XX indicate Output Voltage, xx indicate DataCode
For example: LB33 (V
OUT
=3.3V)
SOT23-3
NUMBER
1
2
3
NAME
GND
OUT
IN
I/O
G
O
I
Ground.
Regulator Output.
DESCRIPTION
Regulator Input. Supply voltage can range from 1.7V to 7.5V. Bypass with a 1μF
capacitor to GND.
VIN
LBXXL
1
2
3
GND
VIN
VOUT
SOT89-3L(L-Type)
SOT89-3L(L-Type)
NUMBER
1
2
3
NAME
GND
IN
OUT
I/O
G
I
O
Ground.
DESCRIPTION
Regulator Input. Supply voltage can range from 1.7V to 7.5V. Bypass with a 1μF
capacitor to GND.
Regulator Output.
3
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