RS3219
Low Power, Low Dropout,
300-mA Low-Noise, Low-IQ LDO
FEATURES
DESCRIPTION
Low Output Noise
The RS3219 series low-power, low-dropout, CMOS
LDO operate from 2.5V to 5.5V input voltage that
can supply up to 300 mA of output current. Designed
to meet the requirements of RF and analog circuits,
the RS3219 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 RS3219 series is available in Green SOT23-3,
SOT23-5 and SOT353 (SC70-5) packages. It
operates over an ambient temperature range of 40°C to +85°C.
Low Dropout Voltage
Thermal-Overload Protection
Output Current Limit
10nA Logic-Controlled Shutdown
Available in Multiple Output Voltage Versions
Fixed Outputs of 1.5V,1.8V,2.5V,3.3V
APPLICATIONS
•
Cellular Telephones
•
Camera Modules
•
Sensors
•
•
HiFi Audio Radio Transceivers
PLL/Synthesizer, Clocking
•
Medium-Current, Noise-Sensitive
Applications
Functional Block Diagram
Current
Limit
IN
1.2V
VREF
OUT
Error
amp
Internal
Controller
Thermal
Shutdown
EN
BP
GND
REV A.3
1
Copyright © 2017,
RUNIC Technology
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RS3219
Pin Configuration and Functions (Top View)
IN
1
GND
2
EN
3
5 OUT
4
BP
SOT23-5/SOT353(SC70-5)
SOT353 (SC70-5) /
SOT23-5
NUMBER
DESCRIPTION
I/O
NAME
1
IN
I
Regulator Input. Supply voltage can range from 2.5V to 5.5V. Bypass with a 1μF
capacitor to GND.
2
GND
G
Ground.
3
EN
I
4
BP
O
5
OUT
O
Shutdown 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
0.1μF ceramic capacitor for reduced noise at the output.
Regulator Output.
GND
1
3
OUT
IN
2
SOT23-3
SOT23-3
NUMBER
NAME
DESCRIPTION
I/O
1
GND
G
Ground.
2
OUT
O
Regulator Output.
3
IN
I
Regulator Input. Supply voltage can range from 2.5V to 5.5V. Bypass with a 1μF
capacitor to GND.
2
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RS3219
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)(1)(2)
MIN
MAX
UNIT
VIN
Input voltage
-0.3
6
V
VOUT
Output voltage
-0.3
VIN + 0.3
V
VEN
Enable input voltage
-0.3
VIN
V
TJ
Junction temperature
150
°C
PD
Continuous power dissipation(3)
Tstg
Storage temperature
(1)
(2)
(3)
W
Internally Limited
-65
150
°C
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)
±2000
±200
Human-body model (HBM)
Electrostatic discharge
UNIT
Machine model(MM)
V
V
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)(1)
MIN
MAX
UNIT
5.5
V
5
V
VIN
Input supply voltage
2.5
VOUT
Output voltage
1.2
VEN
Enable input voltage
0
VIN
V
IOUT
Output current
0
300
mA
–40
85
°C
TJ
(1)
Junction temperature
All voltages are with respect to the GND pin.
Thermal Information
THERMAL METRIC(1)
RS3219
RS3219
SOT23-5
SOT353( SC70-5)
5 PINS
5 PINS
UNIT
RθJA
Junction-to-ambient thermal resistance
230
230
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
150
100
°C/W
RθJB
Junction-to-board thermal resistance
55
70
°C/W
ψJT
Junction-to-top characterization parameter
30
5
°C/W
ψJB
Junction-to-board characterization parameter
55
70
°C/W
RJC(bot)
Junction-to-case (bottom) thermal resistance
N/A
N/A
°C/W
3
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RS3219
ELECTRICAL CHARACTERISTICS
(VIN = VOUT (NOMINAL) + 0.5V (1), Full = -40
PARAMETER
Input Voltage
to +85 , unless otherwise noted.)
SYMBOL
CONDITIONS
VIN
Output Voltage Accuracy (1)
IOUT = 0.1mA
Maximum Output Current (1)
Current Limit (1)
ILIM
Ground Pin Current
IQ
IOUT = 1mA
Dropout Voltage (2)
ΔVLNR
Load Regulation
ΔVLDR
Output Voltage Noise
en
Power Supply Rejection Ratio
PSRR
MIN
MAX
UNITS
+25
2.5(1)
5.5
V
+25
-3.0
6.0
%
+25
300
+25
300
+25
TYP
mA
500
100
mA
200
1.5
+25
IOUT = 300mA
Line Regulation (1)
SHUTDOWN
No load, EN = 2V
TEMP
280
400
µA
mV
VIN = 2.5V or (VOUT + 0.5V) to 5.5V,
IOUT = 1mA
+25
0.03
0.09
%/V
IOUT =0.1mA to 300mA, COUT = 1µF,
+25
0.002
0.005
%/mA
f = 10Hz to 100kHz, CBP = 0.1µF,
COUT = 10µF
+25
28
µVRMS
+25
67
dB
+25
64
dB
f = 217Hz
CBP = 0.1μF, ILOAD = 50mA,
COUT = 1μF, VIN = VOUT+1V f = 1kHz
(3)
VIH
EN Input Threshold
VIN = 2.5V to 5.5V, VEN = -0.3V to VIN
VIL
IB(SHDN)
EN = 0V or EN = 5.5V
Shutdown Supply Current
IQ(SHDN)
EN = 0.4V
Shutdown Exit Delay
0.7x
VIN
V
Full
EN Input Bias Current
(4)
Full
CBP = 0.01μF, COUT = 1μF, No Load
+25
0.3
0.01
1
μA
Full
0.01
Full
0.01
μA
30
μs
+25
THERMAL PROTECTION
Thermal Shutdown
Temperature
Thermal Shutdown Hysteresis
TSHDN
150
ΔTSHDN
15
NOTES:
1. VIN = VOUT (NOMINAL) + 0.5V or 2.5V, whichever is greater.
2. The dropout voltage is defined as VIN - VOUT, when VOUT is 100mV below the value of VOUT for VIN = VOUT + 0.5V.
(Only applicable for VOUT = +2.5V to +5.0V.)
3. VEN = -0.3V to VIN
4. Time needed for VOUT to reach 90% of final value.
4
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RS3219
TYPICAL APPLICATION CIRCUIT
5Pin Typical Circuit
VIN
OUT
CIN
1uF
COUT
1uF
RS3219
ON
OFF
EN
BP
GND
CBP
0.1uF
3Pin Typical Circuit
VIN
OUT
CIN
1uF
COUT
1uF
RS3219
GND
5
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RS3219
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = VOUT (NOMINAL) + 0.5V, CIN = 1μF, COUT = 1μF, CBP = 0.1μF, TA = +25℃, unless otherwise noted.
SHUTDOWN
START UP
2V
2V
EN
0V
0V
EN
VOUT
3V
3.3V
0V
0V
VOUT
Time(20us/div)
Time(200us/div)
LOAD-TRANSIENT RESPONSE
LOAD-TRANSIENT RESPONSE
300mA
50mA
0mA
ILOAD
0mA
3.5V
ILOAD
3.5V
3.3V
VOUT
3.3V
3.1V
VOUT
3.1V
Time(100us/div)
Time(100us/div)
GROUND CURRENT vs TEMPERATURE
150
GROUND CURRENT vs LOAD CURRENT
250
230
140
Ground Current(uA)
Ground Current(uA)
210
130
190
120
170
150
110
130
100
110
90
90
-40
-15
10
35
60
85
0
50
100
150
200
250
300
Load Current(mA)
Temperature(℃)
6
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RS3219
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = VOUT (NOMINAL) + 0.5V, CIN = 1μF, COUT = 1μF, CBP = 0.1μF, TA = +25℃, unless otherwise noted.
GROUND CURRENT vs INPUT VOLTAGE
CURRENT LIMIT vs TEMPERATURE
600
140
550
120
500
Current Limit(mA)
Ground Current(uA)
160
100
450
80
400
350
60
300
40
250
20
200
0
0
1
2
3
4
Input Votage(V)
-40
5
3
0.3
Output Voltage Accuracy(%)
Output Voltage(V)
0.4
2.5
2
1.5
10
35
Temperature(℃)
60
85
OUTPUT VOLTAGE ACCURACY vs
TEMPERATURE
OUTPUT VOLTAGE vs INPUT VOLTAGE
3.5
-15
0.2
0.1
0
-0.1
1
-0.2
0.5
-0.3
-0.4
0
0
1
2
3
4
Input Votage(V)
-40
5
7
-15
10
35
Temperature(℃)
60
85
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RS3219
PACKAGE/ORDERING INFORMATION
MODEL
VOUT (V)
PINPACKAGE
ORDERING
NUMBER
PACKAGE
MARKING
PACKAGE
OPTION
RS3219-3.3
3.3V
SOT23-3
RS3219-3.3YF3
LA33
Tape and Reel, 3000
RS3219-3.3
3.3V
SOT23-5
RS3219-3.3YF5
LA33
Tape and Reel, 3000
RS3219-3.3
3.3V
SOT353
(SC70-5)
RS3219-3.3YC5
LA33
Tape and Reel, 3000
RS3219-2.5
2.5V
SOT23-3
RS3219-2.5YF3
LA25
Tape and Reel, 3000
RS3219-2.5
2.5V
SOT23-5
RS3219-2.5YF5
LA25
Tape and Reel, 3000
RS3219-2.5
2.5V
SOT353
(SC70-5)
RS3219-2.5YC5
LA25
Tape and Reel, 3000
RS3219-1.8
1.8V
SOT23-3
RS3219-1.8YF3
LA18
Tape and Reel, 3000
RS3219-1.8
1.8V
SOT23-5
RS3219-1.8YF5
LA18
Tape and Reel, 3000
RS3219-1.8
1.8V
SOT353
(SC70-5)
RS3219-1.8YC5
LA18
Tape and Reel, 3000
RS3219-1.5
1.5V
SOT23-3
RS3219-1.5YF3
LA15
Tape and Reel, 3000
RS3219-1.5
1.5V
SOT23-5
RS3219-1.5YF5
LA15
Tape and Reel, 3000
RS3219-1.5
1.5V
SOT353
(SC70-5)
RS3219-1.5YC5
LA15
Tape and Reel, 3000
8
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RS3219
PACKAGE OUTLINE DIMENSIONS
SOT23-3
D
1.90
b
2.59
E1
E
0.99
0.95
0.69
e
e1
RECOMMENDED LAND PATTERN (Unit: mm)
0.2
A A2
L
A1
Symbol
c
θ
Dimensions In Millimeters
Dimensions In Inches
Min
Max
Min
Max
A
1.050
1.250
0.041
0.049
A1
0.000
0.100
0.000
0.004
A2
1.050
1.150
0.041
0.045
b
0.300
0.500
0.012
0.020
c
0.100
0.200
0.004
0.008
D
2.820
3.020
0.111
0.119
E
1.500
1.700
0.059
0.067
E1
2.650
2.950
0.104
0.116
e
0.950(BSC)
0.037(BSC)
e1
1.800
2.000
0.071
0.079
L
0.300
0.600
0.012
0.024
θ
0°
8°
0°
8°
9
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RS3219
SOT23-5
D
1.90
b
2.59
E1
E
0.99
0.95
0.69
e
e1
RECOMMENDED LAND PATTERN (Unit: mm)
0.2
A A2
L
A1
Symbol
c
θ
Dimensions In Millimeters
Dimensions In Inches
Min
Max
Min
Max
A
1.050
1.250
0.041
0.049
A1
0.000
0.100
0.000
0.004
A2
1.050
1.150
0.041
0.045
b
0.300
0.500
0.012
0.020
c
0.100
0.200
0.004
0.008
D
2.820
3.020
0.111
0.119
E
1.500
1.700
0.059
0.067
E1
2.650
2.950
0.104
0.116
e
0.950(BSC)
0.037(BSC)
e1
1.800
2.000
0.071
0.079
L
0.300
0.600
0.012
0.024
θ
0°
8°
0°
8°
10
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RS3219
SOT353 (SC70-5)
D
1.30
b
1.9
E
E1
0.75
Pin1
Index Area
0.65
0.4
e
e1
RECOMMENDED LAND PATTERN (Unit: mm)
0.2
A A2
c
θ
L
A1
Symbol
Dimensions In Millimeters
L1
Dimensions In Inches
Min
Max
Min
Max
A
0.900
1.100
0.035
0.043
A1
0.000
0.100
0.000
0.004
A2
0.900
1.000
0.035
0.039
b
0.150
0.350
0.006
0.014
c
0.080
0.150
0.003
0.006
D
2.000
2.200
0.079
0.087
E
1.150
1.350
0.045
0.053
E1
2.150
2.450
0.085
0.096
e
0.650(BSC)
0.026(BSC)
e1
1.300(BSC)
0.051(BSC)
L
0.260
L1
θ
0.460
0.010
0.525
0°
0.018
0.021
8°
11
0°
8°
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