RS3221
Low Power, Low Dropout,
200mA Linear Regulators
FEATURES
DESCRIPTION
Low Dropout Voltage
The RS3221 series low-power, low-dropout, CMOS
LDO operate from 1.7V to 7.5V input voltage that can
supply up to 200 mA of output current. Designed to
meet the requirements of analog circuits, the RS3221
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 RS3221 series is available in Green UTDFN-1x14, SOT23-3, SOT23-5, SOT353(SC70-5) and
SOT89-3L(L-Type) package. It operates over an
ambient temperature range of -40°C to +85°C.
Thermal-Overload Protection
Output Current Limit
10nA Logic-Controlled Shutdown
1μA Low Supply Current
1.7V to 7.5V Input Voltage Range
200mA Output Current
-40°C to +85°C Operating Temperature Range
Available in Green UTDFN-1x1-4, SOT23-5，
SOT23-3, SOT353(SC70-5) and SOT89-3L
(L-Type) Package
APPLICATIONS
•
Cellular Telephones
•
Camera Modules
•
Modems
•
HiFi Audio Radio Transceivers
•
PLL/Synthesizer, Clocking
•
Medium-Current, Noise-Sensitive
Applications
Functional Block Diagram
Current
Limit
IN
VREF
OUT
Current
Limit
IN
VREF
Error
amp
Internal
Controller
Error
amp
Internal
Controller
Thermal
Shutdown
Thermal
Shutdown
EN
BP
GND
REV A.2
OUT
EN
Copyright © 2017,
RUNIC Technology
FB
GND
1 / 15
Copyright © 2017,
RUNIC Technology
www.run-ic.com
RS3221
Pin Configuration and Functions (Top View)
(TOP VIEW)
(TOP VIEW)
IN
1
5 OUT
GND 2
EN
UTDFN-1×1-4
UTDFN-1×1-4
NUMBER
NAME
DESCRIPTION
OUT
O
Regulator Output.
2
GND
G
Ground.
3
EN
I
4
IN
I
-
-
SOT23-5
/SOT353(SC70-5)
NUMBER
4 BP/FB
SOT23-5/SOT353(SC70-5)
I/O
1
Thermal Pad
3
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.
DESCRIPTION
I/O
NAME
1
IN
I
Regulator Input. Supply voltage can range from 1.7V to 7.5V. Bypass with a 1μF
capacitor to GND.
2
GND
G
Ground.
3
EN
I
Enable Input. A logic low reduces the supply current to 10nA. Connect to IN for
normal operation.
O
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.
O
Regulator Output.
BP
4
FB
5
OUT
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RS3221
(TOP VIEW)
VOUT
1
2
LCXX
GND
3
VIN
SOT23-3
NOTE: XX indicate Output Voltage, xx indicate DataCode
For example: LC33 (VOUT=3.3V)
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 1.7V to 7.5V. Bypass with a 1μF
capacitor to GND.
VIN
LCXXL
1
2
3
GND
VIN
VOUT
SOT89-3L(L-Type)
SOT89-3L(L-Type)
NUMBER
NAME
DESCRIPTION
I/O
1
GND
G
Ground.
2
IN
I
Regulator Input. Supply voltage can range from 1.7V to 7.5V. Bypass with a 1μF
capacitor to GND.
3
OUT
O
Regulator Output.
3 / 15
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RS3221
PACKAGE/ORDERING INFORMATION
MODEL
VOUT (V)
PINPACKAGE
ORDERING
NUMBER
PACKAGE
MARKING
PACKAGE OPTION
RS3221-0.8
0.8V
UTDFN-1x1-4
RS3221-0.8YUTDN4
CA
Tape and Reel, 10000
RS3221-1.0
1.0V
UTDFN-1x1-4
RS3221-1.0YUTDN4
CB
Tape and Reel, 10000
RS3221-1.2
1.2V
UTDFN-1x1-4
RS3221-1.2YUTDN4
CC
Tape and Reel, 10000
RS3221-1.5
1.5V
UTDFN-1x1-4
RS3221-1.5YUTDN4
CD
Tape and Reel, 10000
RS3221-1.8
1.8V
UTDFN-1x1-4
RS3221-1.8YUTDN4
CE
Tape and Reel, 10000
RS3221-2.05
2.05V
UTDFN-1x1-4
RS3221-2.05YUTDN4
CF
Tape and Reel, 10000
RS3221-2.5
2.5V
UTDFN-1x1-4
RS3221-2.5YUTDN4
CG
Tape and Reel, 10000
RS3221-2.8
2.8V
UTDFN-1x1-4
RS3221-2.8YUTDN4
CH
Tape and Reel, 10000
RS3221-3.0
3.0V
UTDFN-1x1-4
RS3221-3.0YUTDN4
CI
Tape and Reel, 10000
RS3221-3.3
3.3V
UTDFN-1x1-4
RS3221-3.3YUTDN4
CJ
Tape and Reel, 10000
RS3221-3.6
3.6V
UTDFN-1x1-4
RS3221-3.6YUTDN4
CK
Tape and Reel, 10000
RS3221-4.0
4.0V
UTDFN-1x1-4
RS3221-4.0YUTDN4
CL
Tape and Reel, 10000
RS3221-5.0
5.0V
UTDFN-1x1-4
RS3221-5.0YUTDN4
CM
Tape and Reel, 10000
RS3221-0.8
0.8V
SOT23-5
RS3221-0.8YF5
LC08
Tape and Reel, 3000
RS3221-1.0
1.0V
SOT23-5
RS3221-1.0YF5
LC10
Tape and Reel, 3000
RS3221-1.2
1.2V
SOT23-5
RS3221-1.2YF5
LC12
Tape and Reel, 3000
RS3221-1.5
1.5V
SOT23-5
RS3221-1.5YF5
LC15
Tape and Reel, 3000
RS3221-1.8
1.8V
SOT23-5
RS3221-1.8YF5
LC18
Tape and Reel, 3000
RS3221-2.05
2.05V
SOT23-5
RS3221-2.05YF5
LC205
Tape and Reel, 3000
RS3221-2.5
2.5V
SOT23-5
RS3221-2.5YF5
LC25
Tape and Reel, 3000
RS3221-2.8
2.8V
SOT23-5
RS3221-2.8YF5
LC28
Tape and Reel, 3000
RS3221-3.0
3.0V
SOT23-5
RS3221-3.0YF5
LC30
Tape and Reel, 3000
RS3221-3.3
3.3V
SOT23-5
RS3221-3.3YF5
LC33
Tape and Reel, 3000
RS3221-3.6
3.6V
SOT23-5
RS3221-3.6YF5
LC36
Tape and Reel, 3000
RS3221-4.0
4.0V
SOT23-5
RS3221-4.0YF5
LC40
Tape and Reel, 3000
RS3221-5.0
5.0V
SOT23-5
RS3221-5.0YF5
LC50
Tape and Reel, 3000
RS3221-0.8
0.8V
SOT353(SC70-5)
RS3221-0.8YC5
LC08
Tape and Reel, 3000
RS3221-1.0
1.0V
SOT353(SC70-5)
RS3221-1.0YC5
LC10
Tape and Reel, 3000
RS3221-1.2
1.2V
SOT353(SC70-5)
RS3221-1.2YC5
LC12
Tape and Reel, 3000
RS3221-1.5
1.5V
SOT353(SC70-5)
RS3221-1.5YC5
LC15
Tape and Reel, 3000
RS3221-1.8
1.8V
SOT353(SC70-5)
RS3221-1.8YC5
LC18
Tape and Reel, 3000
RS3221-2.05
2.05V
SOT353(SC70-5)
RS3221-2.05YC5
LC205
Tape and Reel, 3000
RS3221-2.5
2.5V
SOT353(SC70-5)
RS3221-2.5YC5
LC25
Tape and Reel, 3000
RS3221-2.8
2.8V
SOT353(SC70-5)
RS3221-2.8YC5
LC28
Tape and Reel, 3000
RS3221-3.0
3.0V
SOT353(SC70-5)
RS3221-3.0YC5
LC30
Tape and Reel, 3000
RS3221-3.3
3.3V
SOT353(SC70-5)
RS3221-3.3YC5
LC33
Tape and Reel, 3000
RS3221-3.6
3.6V
SOT353(SC70-5)
RS3221-3.6YC5
LC36
Tape and Reel, 3000
RS3221-4.0
4.0V
SOT353(SC70-5)
RS3221-4.0YC5
LC40
Tape and Reel, 3000
RS3221-5.0
5.0V
SOT353(SC70-5)
RS3221-5.0YC5
LC50
Tape and Reel, 3000
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RS3221
MODEL
VOUT (V)
PINPACKAGE
ORDERING
NUMBER
RS3221-1.35
1.35V
UTDFN-1x1-4
RS3221-1.85
1.85V
UTDFN-1x1-4
RS3221-3.3
3.3V
UTDFN-1x1-4
PACKAGE
MARKING
PACKAGE OPTION
RS3221-1.35YUTDN4
CN
Tape and Reel, 10000
RS3221-1.85YUTDN4
CO
Tape and Reel, 10000
RS3221-3.3AYUTDN4
—
Tape and Reel, 10000
RS3221-2.7
2.7V
SOT23-5
RS3221-2.7YF5
CJ
LC27
RS3221-2.85
2.85V
SOT23-5
RS3221-2.85YF5
LC285
Tape and Reel, 3000
RS3221-0.8
0.8V
SOT23-3
RS3221-0.8YF3
LC08
Tape and Reel, 3000
RS3221-1.0
1.0V
SOT23-3
RS3221-1.0YF3
LC10
Tape and Reel, 3000
RS3221-1.2
1.2V
SOT23-3
RS3221-1.2YF3
LC12
Tape and Reel, 3000
RS3221-1.5
1.5V
SOT23-3
RS3221-1.5YF3
LC15
Tape and Reel, 3000
Tape and Reel, 3000
RS3221-1.8
1.8V
SOT23-3
RS3221-1.8YF3
LC18
Tape and Reel, 3000
RS3221-2.05
2.05V
SOT23-3
RS3221-2.05YF3
LC205
Tape and Reel, 3000
RS3221-2.5
2.5V
SOT23-3
RS3221-2.5YF3
LC25
Tape and Reel, 3000
RS3221-2.8
2.8V
SOT23-3
RS3221-2.8YF3
LC28
Tape and Reel, 3000
RS3221-3.0
3.0V
SOT23-3
RS3221-3.0YF3
LC30
Tape and Reel, 3000
RS3221-3.3
3.3V
SOT23-3
RS3221-3.3YF3
LC33
Tape and Reel, 3000
RS3221-3.6
3.6V
SOT23-3
RS3221-3.6YF3
LC36
Tape and Reel, 3000
RS3221-4.0
4.0V
SOT23-3
RS3221-4.0YF3
LC40
Tape and Reel, 3000
RS3221-5.0
5.0V
SOT23-3
RS3221-5.0YF3
LC50
Tape and Reel, 3000
RS3221-1.8
1.8V
SOT89-3L(L-Type)
RS3221-1.8YE3L
LC18L
Tape and Reel, 1000
RS3221-2.5
2.5V
SOT89-3L(L-Type)
RS3221-2.5YE3L
LC25L
Tape and Reel, 1000
RS3221-3.3
3.3V
SOT89-3L(L-Type)
RS3221-3.3YE3L
LC33L
Tape and Reel, 1000
PINPACKAGE
ORDERING
NUMBER
PACKAGE
MARKING
PACKAGE OPTION
SOT23-5
RS3221-ADJ8YF5
LCAD8
Tape and Reel, 3000
SOT353(SC70-5)
RS3221-ADJ8YC5
LCAD8
Tape and Reel, 3000
SOT23-5
RS3221-ADJCYF5
LCADC
Tape and Reel, 3000
SOT353(SC70-5)
RS3221-ADJCYC5
LCADC
Tape and Reel, 3000
MODEL
VFB (V)
RS3221-ADJ8
0.81
RS3221-ADJC
1.21
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RS3221
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)(2)
MIN
MAX
UNIT
VIN
Input voltage
-0.3
8
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
V(ESD)
Electrostatic discharge
VALUE
UNIT
Human-body model (HBM)
±6000
V
Machine model (MM)
±400
V
MAX
UNIT
7.5
V
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted) (1)
MIN
VIN
Input supply voltage
1.7
VEN
Enable input voltage
0
VIN
V
IOUT
Output current
0
300
mA
-40
+85
°C
TA
Operating temperature
(1) All voltages are with respect to the GND pin.
Thermal Information
THERMAL METRIC (1)
RθJA
RθJC(top)
Junction-to-ambient thermal
resistance
Junction-to-case (top) thermal
resistance
RθJB
Junction-to-board thermal resistance
ψJT
Junction-to-top characterization
parameter
Junction-to-board characterization
parameter
Junction-to-case (bottom) thermal
resistance
ψJB
RJC(bot)
Pd
Power Dissipation
RS3221
RS3221
UTDFN1x1-4
SOT353
(SC70-5)
RS3221
RS3221
RS3221
SOT23-5
SOT23-3
SOT89-3L
(L-Type)
UNIT
4 PINS
5 PINS
5 PINS
3 PINS
3 PINS
312.5
312.5
250
312.5
208.3
°C/W
137.9
141.8
84.3
134.3
88.5
°C/W
83.5
84.5
39.5
84.5
39.6
°C/W
5.3
3.9
2.86
4.8
26.5
°C/W
83.8
82.1
58.5
81.5
49.7
°C/W
71.8
N/A
N/A
N/A
77.7
°C/W
0.4
0.4
0.5
0.4
0.6
W
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RS3221
ELECTRICAL CHARACTERISTICS
(VIN = VOUT (NOMINAL) + 0.5V (1), Full = -40°C to +85°C, unless otherwise noted.)
PARAMETER
SYMBOL
Input Voltage
Output Voltage Accuracy (1)
Feedback Voltage
Maximum Output Current
Current Limit
CONDITIONS
TEMP
MAX
UNITS
+25°C 1.7(1)
7.5
V
IOUT = 0.1mA
+25°C
-2.5
2.5
%
IOUT = 0.1mA ，RS3221-3.3AYUTDN4
+25°C
-1
1
%
IOUT = 0.1 mA, RS3221-ADJ8
+25°C
0.79
0.81
0.83
V
IOUT = 0.1 mA, RS3221-ADJC
+25°C
1.18
1.21
1.24
V
+25°C
200
VIN
VFB
(1)
(1)
Ground Pin Current
ILIM
IQ
No load
MIN
300
mA
+25°C
1.0
µA
580
VOUT=1.5V
VDROP
Line Regulation (1)
ΔVLNR
Load Regulation
ΔVOUT
Output Voltage Noise
Output Voltage Temperature
Coefficient
Power Supply Rejection Ratio
en
IOUT = 200mA
VOUT=1.8V
400
+25°C
280
VOUT=3.0V
160
VOUT=3.3V
155
mV
VIN = (VOUT + 0.5V) to 7.5V,
IOUT = 1mA
+25°C
0.1
0.2
%/V
IOUT =0.1mA to 200mA, COUT = 1µF
+25°C
15
30
mV
+25°C
0.5
10
mV
+25°C
170
µVRMS
FULL
65
ppm/℃
IOUT =0.1mA to 200mA,
COUT = 1µF, RS3221-ADJ
f = 10Hz to 100kHz, CBP = 10nF,
COUT = 1µF, IOUT=30mA
ΔVOUT
ILOAD = 0.1mA
ΔTA × VOUT
PSRR
mA
+25°C
VOUT=1.2V
Dropout Voltage (2)
TYP
CBP = 0μF, ILOAD = 30mA,
COUT = 1μF, VIN =
VOUT+1V
ΔVRIPPLE=0.2VP-P
CBP = 10nF, ILOAD = 30mA,
COUT = 1μF, VIN =
VOUT+1V
ΔVRIPPLE=0.2VP-P
f = 217Hz
46
+25°C
dB
f = 1kHz
34
f = 217Hz
48
+25°C
dB
f = 1kHz
36
SHUTDOWN
EN Input Threshold
EN Input Threshold
EN Input Bias Current
Shutdown Supply Current
Start-Up Time (4)
VIH
VIL
VIH
VIL
IBH
EN = 7.5V
EN = 0V
EN = 0V
tSTR
RON of Discharge MOSFET
1.4
Full
Full
VIN = 7.5V
IBL
IQ(SHDN)
Full
VIN = 1.7V
0.4
2.3
Full
0.8
+25°C
0.01
Full
0.01
1
1
V
V
µA
Full
0.01
COUT = 1μF, No Load
+25°C
180
µA
µs
VIN = 4.0V, VEN = 0V
+25°C
25
Ω
140
°C
THERMAL PROTECTION
Thermal Shutdown
Temperature
TSHDN
7 / 15
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RS3221
NOTES:
1. VIN = VOUT (NOMINAL) + 0.5V or 1.7V, 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.
3. Time needed for VOUT to reach 90% of final value.
TYPICAL APPLICATION CIRCUIT
Typical Circuit
Typical Circuit
INPUT
1.7V to 7.5V
1
INPUT
1.7V to 7.5V
OUTPUT
IN
OUT
5
CIN
1uF
1
OUTPUT
IN
OUT
5
CIN
1uF
COUT
1uF
COUT
1uF
RS3221
RS3221
ON
ON
If need deduce more
noise, CBP=0.01uF
OFF
OFF
3
BP
EN
GND
4
NC
3
For most application,
BP can float.
2
CIN
1uF
OUT
5
1
CIN
1uF
COUT
1uF
RS3221
-ADJ8
ON
INPUT
1.7V to 7.5V
OUTPUT
IN
CBP
2
0.01uF
Typical Circuit
Typical Circuit
1
4
GND
SOT23-5/SOT353(SC70-5)
SOT23-5/SOT353(SC70-5)
INPUT
1.7V to 7.5V
BP
EN
OUTPUT
IN
OUT
5
COUT
1uF
RS3221
-ADJC
R1
ON
R1
OFF
OFF
3
FB
EN
3
4
GND
FB
EN
GND
R2
4
R2
2
2
SOT23-5/SOT353(SC70-5)
SOT23-5/SOT353(SC70-5)
NOTE: Choose R2 = 160kΩ to maintain a 5μA minimum load.
Calculate the value for R1 using the following equation:
VOUT
𝑅1 = 𝑅2 ∗ (
− 1)
0.81
NOTE: Choose R2 = 240kΩ to maintain a 5μA minimum load.
Calculate the value for R1 using the following equation:
VOUT
𝑅1 = 𝑅2 ∗ (
− 1)
1.21
Typical Circuit
INPUT
1.7V to 7.5V
4
OUTPUT
IN
OUT
CIN
1uF
1
COUT
1uF
RS3221
ON
OFF
3
EN
GND
2
UTDFN-1×1-4
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RS3221
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = VOUT (NOMINAL) + 0.5V, CIN = 1μF, COUT = 1μF, CBP = 0μF, TA = +25℃, unless otherwise noted.
Turn On Speed with EN Pin
Turn Off Speed with EN Pin
2V/div
VOUT
2V/div
2V/div
VEN
VEN
2V/div
VOUT
VIN=4.3V,IOUT=0mA,VOUT=3.3V
VIN=4.3V,IOUT=0mA,VOUT=3.3V
Time(400us/div)
Time(400us/div)
Line Transient Response
Load Transient Response
IOUT
500mV/div
100mV/div
VOUT
20mA/div
1V/div
VIN
VOUT
IOUT=1mA to 40mA
VIN=4V to 5V,IOUT=30mA
Time(2ms/div)
Time(2ms/div)
SHUTDOWN
2V
EN
0V
3.3V
0V
VOUT
Time(200us/div)
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RS3221
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = VOUT (NOMINAL) + 0.5V, CIN = 1μF, COUT = 1μF, CBP = 0μF, TA = +25℃, unless otherwise noted.
Output Voltage vs Input Voltage
3.5
30
Supply Pin Current(uA)
3
Output Voltage(V)
Supply pin Current vs Input Voltage
35
25
2.5
20
2
15
1.5
10
1
5
0.5
0
0
-0.5
0.5
1.5
2.5
3.5
4.5
5.5
6.5
0
7.5
1
Input Voltage(V)
OUTPUT VOLTAGE ACCURACY vs
TEMPERATURE
3
4
5
Input Voltage(V)
6
7
Ground Current vs Load Current
50
45
0.3
Ground Current(uA)
Output Voltage Accuracy(%)
0.4
2
0.2
0.1
0
-0.1
-0.2
-0.3
40
35
30
25
20
15
10
5
-0.4
0
-40
-15
10
35
Temperature(℃)
60
85
0
50
100
150
200
250
300
Load Current(mA)
Ground Current(uA)
GROUND CURRENT vs TEMPERATURE
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
-40
-15
10
35
Temperature(℃)
60
85
10 / 15
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RS3221
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°
11 / 15
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RS3221
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°
12 / 15
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RS3221
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°
13 / 15
0°
8°
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RS3221
UTDFN-1x1-4
Symbol
3
4
2
1
Dimensions In Millimeters
MIN
MOD
MAX
A
0.340
0.370
0.400
A1
0.000
0.020
0.050
A2
0.100REF
D
0.950
1.000
1.050
D1
0.430
0.480
0.530
E
0.950
1.000
1.050
E1
0.430
0.480
0.530
b
0.170
0.220
0.270
e
0.600
0.650
0.700
f
L
0.195REF
0.200
0.250
14 / 15
0.300
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RS3221
SOT89-3L
D
2.0
A
D1
3.0
E
E1
0.7
45°
b1
L
e
1.5
b
c
1.5
e1
1.0
RECOMMENDED LAND PATTERN (Unit: mm)
Symbol
Dimensions In Millimeters
Dimensions In Inches
Min
Max
Min
Max
A
1.400
1.600
0.055
0.063
b
0.320
0.520
0.013
0.020
b1
0.400
0.580
0.016
0.023
c
0.350
0.440
0.014
0.017
D
4.400
4.600
0.173
0.181
D1
1.550 REF
0.061 REF
E
2.300
2.600
0.091
0.102
E1
3.940
4.250
0.155
0.167
e
1.500 BSC
0.060 BSC
e1
3.000 BSC
0.118 BSC
L
0.900
1.200
15 / 15
0.035
0.047
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