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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，
SOT353(SC70-5) 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, SOT23-5
，
SOT353(SC70-5) 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
1.2V
V
REF
Error
amp
Internal
Controller
Thermal
Shutdown
EN
BP
GND
Copyright © 2017,
RUNIC Technology
REV A.3
1
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RS3236
Pin Configuration and Functions (Top View)
(TOP VIEW)
(TOP VIEW)
IN
1
5 OUT
GND
2
EN
3
4
BP
UTDFN-1×1-4
UTDFN-1×1-4
I/O
NUMBER
1
2
3
4
Thermal Pad
NAME
OUT
GND
EN
IN
-
O
G
I
I
-
Regulator Output.
Ground.
SOT23-5/SOT353(SC70-5)
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
4
5
NAME
IN
GND
EN
BP
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.
Regulator Output.
I
G
I
O
O
2
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RS3236
PACKAGE/ORDERING INFORMATION
MODEL
RS3236-0.8
RS3236-1.0
RS3236-1.2
RS3236-1.5
RS3236-1.8
RS3236-2.05
RS3236-2.5
RS3236-2.8
RS3236-3.0
RS3236-3.3
RS3236-3.6
RS3236-4.0
RS3236-5.0
RS3236-0.8
RS3236-1.0
RS3236-1.2
RS3236-1.5
RS3236-1.8
RS3236-2.05
RS3236-2.5
RS3236-2.8
RS3236-3.0
RS3236-3.3
RS3236-3.6
RS3236-4.0
RS3236-5.0
RS3236-0.8
RS3236-1.0
RS3236-1.2
RS3236-1.5
RS3236-1.8
RS3236-2.05
RS3236-2.5
RS3236-2.8
RS3236-3.0
RS3236-3.3
RS3236-3.6
RS3236-4.0
RS3236-5.0
VOUT (V)
0.8V
1.0V
1.2V
1.5V
1.8V
2.05V
2.5V
2.8V
3.0V
3.3V
3.6V
4.0V
5.0V
0.8V
1.0V
1.2V
1.5V
1.8V
2.05V
2.5V
2.8V
3.0V
3.3V
3.6V
4.0V
5.0V
0.8V
1.0V
1.2V
1.5V
1.8V
2.05V
2.5V
2.8V
3.0V
3.3V
3.6V
4.0V
5.0V
PIN-
PACKAGE
UTDFN-1x1-4
UTDFN-1x1-4
UTDFN-1x1-4
UTDFN-1x1-4
UTDFN-1x1-4
UTDFN-1x1-4
UTDFN-1x1-4
UTDFN-1x1-4
UTDFN-1x1-4
UTDFN-1x1-4
UTDFN-1x1-4
UTDFN-1x1-4
UTDFN-1x1-4
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT353(SC70-5)
SOT353(SC70-5)
SOT353(SC70-5)
SOT353(SC70-5)
SOT353(SC70-5)
SOT353(SC70-5)
SOT353(SC70-5)
SOT353(SC70-5)
SOT353(SC70-5)
SOT353(SC70-5)
SOT353(SC70-5)
SOT353(SC70-5)
SOT353(SC70-5)
ORDERING
NUMBER
RS3236-0.8YUTDN4
RS3236-1.0YUTDN4
RS3236-1.2YUTDN4
RS3236-1.5YUTDN4
RS3236-1.8YUTDN4
RS3236-2.0YUTDN4
RS3236-2.5YUTDN4
RS3236-2.8YUTDN4
RS3236-3.0YUTDN4
RS3236-3.3YUTDN4
RS3236-3.6YUTDN4
RS3236-4.0YUTDN4
RS3236-5.0YUTDN4
RS3236-0.8YF5
RS3236-1.0YF5
RS3236-1.2YF5
RS3236-1.5YF5
RS3236-1.8YF5
RS3236-2.0YF5
RS3236-2.5YF5
RS3236-2.8YF5
RS3236-3.0YF5
RS3236-3.3YF5
RS3236-3.6YF5
RS3236-4.0YF5
RS3236-5.0YF5
RS3236-0.8YC5
RS3236-1.0YC5
RS3236-1.2YC5
RS3236-1.5YC5
RS3236-1.8YC5
RS3236-2.0YC5
RS3236-2.5YC5
RS3236-2.8YC5
RS3236-3.0YC5
RS3236-3.3YC5
RS3236-3.6YC5
RS3236-4.0YC5
RS3236-5.0YC5
PACKAGE
MARKING
BA
BB
BC
BD
BE
BF
BG
BH
BI
BJ
BK
BL
BM
LB08
LB10
LB12
LB15
LB18
LB20
LB25
LB28
LB30
LB33
LB36
LB40
LB50
LB08
LB10
LB12
LB15
LB18
LB20
LB25
LB28
LB30
LB33
LB36
LB40
LB50
PACKAGE OPTION
Tape and Reel, 10000
Tape and Reel, 10000
Tape and Reel, 10000
Tape and Reel, 10000
Tape and Reel, 10000
Tape and Reel, 10000
Tape and Reel, 10000
Tape and Reel, 10000
Tape and Reel, 10000
Tape and Reel, 10000
Tape and Reel, 10000
Tape and Reel, 10000
Tape and Reel, 10000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
3
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RS3236
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)
(1)(2)
MIN
V
IN
V
EN
T
J
P
D
T
stg
(1)
Input voltage
Enable input voltage
Junction temperature
Continuous power dissipation
(3)
Storage temperature
MAX
UNIT
V
V
°
C
W
°
C
-0.3
-0.3
8
V
IN
150
Internally Limited
-65
150
(2)
(3)
Stresses beyond those listed under
Absolute Maximum Ratings
may cause permanent damage to the device. These are stress
ratings only, and functional operation of the device at these or any other conditions beyond those indicated under
Recommended
Operating Conditions
is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device
reliability.
All voltages are with respect to the GND pin.
Internal thermal shutdown circuitry protects the device from permanent damage.
ESD Ratings
VALUE
V
(ESD)
Electrostatic discharge
Human-body model (HBM)
Machine model (MM)
UNIT
V
V
±6000
±400
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
(1)
MIN
V
IN
V
EN
I
OUT
Input supply voltage
Enable input voltage
Output current
MAX
UNIT
V
V
mA
°C
1.7
0
0
-40
7.5
V
IN
500
+85
T
J
Junction temperature
(1) All voltages are with respect to the GND pin.
Thermal Information
RS3236
THERMAL METRIC (1)
UTDFN-1x1-4
4 PINS
R
θJA
R
θJC(top)
R
θJB
ψ
JT
ψ
JB
R
JC(bot)
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
RS3236
SOT353
(SC70-5)
5 PINS
RS3236
SOT23-5
5 PINS
UNIT
144.1
137.9
83.5
5.3
83.8
71.8
268
171.8
64.5
40.5
62.9
N/A
185.6
104.3
54.5
31.0
54.5
N/A
°
C/W
°
C/W
°
C/W
°
C/W
°
C/W
°
C/W
4
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RS3236
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT (NOMINAL)
+ 0.5V
(1)
, Full = -40° to +85° unless otherwise noted.)
C
C,
PARAMETER
Input Voltage
Output Voltage Accuracy
(1)
Maximum Output Current
(1)
Current Limit
(1)
Ground Pin Current
Dropout Voltage
(2)
Line Regulation
(1)
Load Regulation
Output Voltage Noise
I
LIM
I
Q
No load
I
OUT
= 300mA
V
OUT
=3.3V
SYMBOL
V
IN
I
OUT
= 0.1mA
CONDITIONS
TEMP
MIN
TYP
MAX
7.5
2.5
UNITS
V
%
mA
800
15
450
0.1
20
80
72
70
74
+25°C
70
dB
20
550
0.2
40
mA
µA
mV
%/V
mV
µ V
RMS
dB
+25°C 1.7
(1)
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
-2.5
500
500
V
DROP
ΔV
LNR
ΔV
OUT
e
n
V
IN
= (V
OUT
+ 0.5V) to 7.5V,
I
OUT
= 1mA
I
OUT
=0.1mA to 300mA, C
OUT
= 1µF,
f = 10Hz to 100kHz, C
BP
= 0.01µF,
C
OUT
= 10µF, I
OUT
=30mA
C
BP
= 0μF, I
LOAD
= 30mA,
C
OUT
= 1μF, V
IN
= V
OUT
+1V
ΔV
RIPPLE
=0.2V
P-P
f = 217Hz
f = 1kHz
f = 217Hz
f = 1kHz
Power Supply Rejection Ratio
PSRR
C
BP
= 0.01μF,
I
LOAD
= 30mA,
C
OUT
= 1μF, V
IN
= V
OUT
+1V
ΔV
RIPPLE
=0.2V
P-P
SHUTDOWN
EN Input Threshold
V
IH
V
IL
V
IH
V
IL
I
BH
I
BL
I
Q(SHDN)
t
STR
V
IN
= 1.7V
Full
Full
Full
Full
+25°C
Full
Full
+25°C
0.01
0.01
0.01
180
1
2.3
0.8
1
1.4
0.4
V
V
EN Input Threshold
V
IN
= 7.5V
EN = 7.5V
EN = 0V
EN = 0V
C
OUT
= 1μF, No Load
EN Input Bias Current
Shutdown Supply Current
Start-Up Time
(4)
THERMAL PROTECTION
Thermal Shutdown Temperature
µA
µA
µs
T
SHDN
140
°C
NOTES:
1. V
IN
= V
OUT (NOMINAL)
+ 0.5V or 1.7V, whichever is greater.
2. The dropout voltage is defined as V
IN
- V
OUT
, when V
OUT
is 100mV below the value of V
OUT
for V
IN
= V
OUT
+ 0.5V.
3. Time needed for V
OUT
to reach 90% of final value.
5
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