SL9350 Series
Low Dropout Regulators
Description
SOT-23
SL9350 Series are a high accuracy, low noise, high speed, low dropout
3.VIN
CMOS Linear regulator with high ripple rejection and fast discharge function.
The device offers a new level of cost effective performance in cellular phones,
surveillance system, Bluetooth, wireless and other portable electronic devices.
SL9350 Series can provide product selections of output value in the range
1.GND
of 1.2V~3.6V by every 0.1V step.
The current limiter's fold-back circuit also operates as a short circuit
2.VOUT
SOT-23-3
protection and an output current limiter at the output pin.
3.VIN
The SL9350 Series are available in standard SOT-23、SOT-89、SOT-23-3
SOT23-5 and DFN1x1-4L packages. Standard products are Pb-free and
Halogen-free.
2.VOUT
1.GND
Features
⚫ Maximum Output Current: 400mA(@VIN-VOUT=0.5V)
SOT-89
⚫ Output Voltage Range: 1.2V~3.6V(customized by every 0.1V step)
2.VIN
⚫ Low Quiescent Current: 50uA(Typ.)
⚫ Low Dropout Voltage: 220mV@IOUT=200mA
⚫ 0.01%/V Line Regulation
⚫ 75dB PSRR @ 1KHz
⚫ Standby Current: < 1μA
⚫ VOUT fast discharge
1.GND 2.VIN 3.VOUT
Applications
SOT-23-5
⚫ Digital cameras
4. NC
5. VOUT
⚫ Cellphones
⚫ Bluetooth and wireless handsets
⚫ Other portable electronic devices
Marking Code
1.SOT
9350
-XX
XX:Output Voltage
e.g. 3.0:3.0V 3.3:3.3V
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1.VIN
2.DFN
2.GND
3.EN
DFN1x1-4L
Bottom View
AXX
3.EN
2.GND
GND
A:Product Code
XX:Output Voltage
e.g. 30:3.0V 33:3.3V
1.VOUT
1
4.VIN
Rev.1 -- 11 December 2017
SL9350 Series
Functional Pin Description
Pin Name
Pin Function
VIN
Power Input Voltage
GND
Ground
EN
Chip Enable (Active High). Note that this pin is high impedance
NC
NO Connected
VOUT
Output Voltage
Ordering Information
SL9350
Package Type
SA:SOT-23 SQ:SOT-89
SC:SOT-23-3 SE:SOT-23-5
DE:DFN1x1-4L
Output Voltage
12 : 1.2V 15 : 1.5V
22 : 2.2V 25 : 2.5V
27 : 2.7V 28 : 2.8V
30 : 3.0V 33 : 3.3V
18 : 1.8V
26 : 2.6V
29 : 2.9V
36 : 3.6V
Output current tap
L : 300mA
Function Block Diagram
VOUT
VIN
Current
Limit
VREF
EN
Enable
Control
GND
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2
Rev.1 -- 11 December 2017
SL9350 Series
Absolute Maximum Ratings Note1
Ratings at 25℃ ambient temperature unless otherwise specified.
Parameter
Value
Unit
-0.3~8
V
400
mA
SOT-23
400
mW
SOT-89
600
mW
SOT-23-3
450
mW
SOT-23-5
450
mW
DFN1x1-4L
550
mW
SOT-23
250
°C/W
SOT-89
165
°C/W
SOT-23-3
220
°C/W
SOT-23-5
220
°C/W
DFN1x1-4L
180
°C/W
Junction Temperature
-40 ~ +125
°C
Operating Ambient Temperature
-40 ~ +85
°C
Storage Temperature Range
-55~ +150
°C
Lead Temperature&Time
260°C,10S
--
Maximum Input Voltage
Output Current
Power Dissipation
Thermal Resistance,Junction-to-Ambient
Note1: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect.
Recommended Operating Conditions
Parameter
Supply Voltage
Maximum Output Current
Operating Ambient Temperature
Value
Unit
2.5~6.5
V
300
mA
-40 ~ +85
°C
Typical Application Circuit
VIN
1
5
4.7uF
VOUT
4.7uF
2
ON
3
4
OFF
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Rev.1 -- 11 December 2017
SL9350 Series
Electrical Characteristics
VIN=VOUT+1V, TA=25℃ , unless otherwise noted.)
Parameter
Input Voltage
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
2.5
--
6.5
V
-3
--
+3
%
VOUT ≥1.8V, IOUT=1mA
-2
--
+2
%
VIN=5V, IOUT=0mA
--
50
--
μA
VOUT≥2.5V, IOUT=200mA
--
220
250
mV
VOUT≥2.5V, IOUT=300mA
--
320
350
mV
VIN=2.7~5.5V, IOUT=1mA
--
0.01
0.15
%/V
--
40
70
mV
--
100
--
mA
VIN
VOUT 1.8V, IOUT=1~300mA
VOUT≤1.8V, IOUT=1~200mA
VEN=VIN, VOUT Short to GND
with 1Ω
ILIMIT
VIN=VOUT+1V
--
360
--
mA
IStandby
VEN=0
--
--
1
μA
--
75
--
dB
--
45
--
dB
VIN=5VDC+0.5VP-P
Power Supply
Rejection Rate
PSRR
f=1KHz, IOUT=10mA
VIN=5VDC+0.5VP-P
f=1MHz, IOUT=10mA
EN Logic High Voltage
VENH
VIN=5.5V, IOUT=1mA
1.2
--
VIN
V
EN Logic Low Voltage
VENlL
VIN=5.5V, VOUT=0V
--
--
0.4
V
EN Input Current
IEN
VEN= 0~5.5V
--
--
1.0
μA
Output Noise Voltage
eN
10Hz to 100KHz, COUT=1μF
--
100
--
μVRMS
Output Discharge Resistance
RDIS
VIN=5.0V, VEN= 0V
--
160
--
Ω
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Rev.1 -- 11 December 2017
SL9350 Series
Typical Electrical Curves
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
60
IQ Quiescent Current (μA)
IQ Quiescent Current (μA)
CIN=4.7uF, COUT=4.7uF, VIN=4.3V, VOUT=3.3V TA=25°C, Package is SOT-23-5(unless otherwise noted)
0
1
2
3
4
5
6
50
40
30
20
10
0
7
-40
10
VOUT Output Voltage (V)
VOUT Output Voltage (V)
160
3.4
3.5
3
2.5
2
1.5
1
Io=1mA
0.5
0
0
1
2
3
4
5
3.35
3.3
3.25
3.2
3.15
3.1
3.05
3
6
-40
10
4
VOUT Output Voltage (V)
3
VOUT=3.3V
2.5
Package: SOT-23-5
2
1.5
1
Vin=Ven=4.3V
0.5
160
Vin=Ven=5V
0
100
200
300
1.2
1
0.8
VOUT=1.2V
0.6
Package: SOT-23-5
0.4
Vin=Ven=2.5V
0.2
0
400
Vin=Ven=5V
0
100
200
300
400
500
IOUT Output Current (mA)
IOUT Output Current (mA)
2.5
VOUT Output Voltage (V)
4
3.5
3
2.5
VIN=4.3V
2
VIN=5.0V
1.5
VIN=5.3V
1
VOUT=3.3V
Package:DFN1x1-4L
0.5
0
110
1.4
3.5
0
60
T Temperature (℃)
VIN Input Voltage (V)
VOUT Output Voltage (V)
110
T Temperature (℃)
VIN Input Voltage (V)
VOUT Output Voltage (V)
60
0
100
200
300
VIN=6.0V
VIN=6.5V
400
VIN=2.8V
VIN=3.8V
1.5
VIN=4.0V
1
VIN=5.0V
0.5
0
VOUT=1.8V
Package:DFN1x1-4L
0
100
200
300
VIN=6.0V
VIN=6.5V
400
IOUT Output Current (mA)
IOUT Output Current (mA)
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5
Rev.1 -- 11 December 2017
SL9350 Series
600
ILIMIT Current Limit (mA)
ILIMIT Current Limit (mA)
600
500
400
300
200
VOUT=3.3V
100
0
3.5
4
4.5
PSRR Power Supply Rejection Rate (dB)
VDrop Dropout Voltage (mV)
300
250
200
150
100
50
50
100
150
200
300
200
VOUT=1.8V
100
3.5
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4.5
5
250
300
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
Io=10mA
10.0
0.0
0.01
IOUT Output Current (mA)
EN ON / OFF
VEN=0V to 4.5V
4
VIN Input Voltage (V)
350
0
400
0
5
VIN Input Voltage (V)
0
500
0.1
1
10
100
1000
f Frequency (KHz)
IOUT=10mA
VEN=4.5V to 0V
EN: 1V/div
EN: 1V/div
VIN: 1V/div
VIN: 1V/div
VOUT: 1V/div
VOUT: 1V/div
6
IOUT=10mA
Rev.1 -- 11 December 2017
SL9350 Series
Power ON / OFF
VIN=0V to 4.5V
Line Transient
VIN=4V to 5V
IOUT=10mA
VIN=4.5V to 0V
VIN: 1V/div
VIN: 1V/div
VOUT: 1V/div
VOUT: 1V/div
IOUT=10mA
VIN=5V to 4V
VIN: 1V/div
VIN: 1V/div
VOUT: 100mV/
VOUT: 100mV/
div
div
Load Transient
CH1: IOUT CH2: VIN CH3: VOUT
VIN=4.3V, VOUT=3.3V
IOUT=1mA to
50mA
VIN=4.3V, VOUT
= 3.3V
Cin: 4.7uF, Co: 1uF
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IOUT=10mA
IOUT=10mA
IOUT=1mA to 100mA
Cin: 4.7uF, Co: 1uF
7
Rev.1 -- 11 December 2017
SL9350 Series
VIN=4.3V, VOUT
= 3.3V
IOUT=1mA to 200mA
VIN=4.3V, VOUT
= 3.3V
Cin: 4.7uF, Co: 1uF
Cin: 4.7uF, Co: 1uF
VIN=4.3V, VOUT
= 3.3V
IOUT=1mA to 200mA
VIN=4.3V, VOUT
= 3.3V
IOUT=1mA to 300mA
VIN=3.3V, VOUT
= 1.2V
IOUT=1mA to 300mA
VIN=5V, VOUT=1.2V
Cin: 1uF, Co: 1uF
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IOUT=1mA to 300mA
Cin: 1uF, Co: 1uF
Cin: 1uF, Co: 1uF
VIN=4V, VOUT=1.2V
IOUT=1mA to 300mA
Cin: 4.7uF, Co: 4.7uF
Cin: 4.7uF, Co: 4.7uF
VIN=2.8V, VOUT
= 1.2V
IOUT=1mA to 300mA
IOUT=1mA to 300mA
Cin: 1uF, Co: 1uF
8
Rev.1 -- 11 December 2017
SL9350 Series
Function Descriptions
A minimum of 1uF capacitor must be connected from Vout to ground to insure stability. Input capacitor of 1uF is
recommended to ensure the input voltage does not sag below the minimum dropout voltage during load transient
event. Vin pin must always be dropout voltage higher than Vout in order for the device to regulate properly.
Application Information
SL9350 Series requires input and output decoupling capacitors. The device is specifically designed for portable
applications requiring minimum board space and smallest components. These capacitors must be correctly selected
for good performance. Please note that linear regulators with a low dropout voltage have high internal loop gains,
which require care in guarding against oscillation caused by insufficient decoupling capacitors.
Capacitor Selection
Normally, use a 1μF capacitor on the input and a 1μF capacitor on the output of the SL9350 Series. Larger
input capacitor values and lower ESR (X5R, X7R) provide better supply noise rejection and transient response.
A higher value output capacitor (4.7μF) may be necessary if large, fast transients are anticipated and the device
is located several inches from the power source.
Input-Output (Dropout) Voltage
A regulator's minimum input-to-output voltage differential (dropout voltage) determines the lowest usable supply
voltage. In battery-powered systems, this determines the useful end-of-life battery voltage. Because the device uses a
PMOS, its dropout voltage is a function of drain to source on resistance, RDS (on), multiplied by the load current:
VDROP = VIN -VOUT= RDS (on) x IOUT
Current Limit and Thermal Shutdown Protection
In order to prevent overloading or thermal condition from damaging the device, SL9350 Series has internal
thermal and current limiting functions designed to protect the device. It will rapidly shut off PMOS pass element
during overloading or over temperature condition.
Thermal Considerations
The SL9350 Series can deliver a current of up to 300mA over the full operating junction temperature range.
However, the maximum output current must be controlled at higher ambient temperature to ensure the junction
temperature does not exceed 150°C. With all possible conditions, the junction temperature must be within the range
specified under operating conditions. Power dissipation can be calculated based on the output current and the voltage
drop across regulator.
PD = (VIN - VOUT) x IOUT
The final operating junction temperature for any set of conditions can be estimated by the following thermal equation:
PD (max) = (Tj (max) - Ta) / RθJA
Where Tj (max) is the maximum junction temperature of the die (150°C) and Ta is the maximum ambient temperature.
PCB Layout
An input capacitance of ≅4 .7μF is required between the SL9350 Series input pin and ground (the amount of the
capacitance may be increased without limit), this capacitor must be located a distance of not more than 1cm from the input
and return to a clean analog ground. Input capacitor can filter out the input voltage spikes caused by the surge current due
to the inductive effect of the package pin and the printed circuit board’s routing wire. Otherwise, the actual voltage at the Vin
pin may exceed the absolute maximum rating. The output capacitor also must be located a distance of not more than 1cm
from output to a clean analog ground. Because it can filter out the output spike caused by the surge current due to the
inductive effect of the package pin and the printed circuit board’s routing wire.
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Rev.1 -- 11 December 2017
SL9350 Series
Package Outline
SOT-23
Dimensions in mm
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10
Rev.1 -- 11 December 2017
SL9350 Series
Package Outline
SOT-89
Dimensions in mm
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11
Rev.1 -- 11 December 2017
SL9350 Series
Package Outline
SOT-23-3
Dimensions in mm
1.6
2.8
±0.1
10
0.127 +0.05/-0.02
±0.1
±0.1
2.92
12
R0.15MAX
0.95±0.1
0.35±0.05
R0.15MAX
0.06
12
± 0.05
0.65
±0.1
1.1
±0.1
10
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Rev.1 -- 11 December 2017
SL9350 Series
Package Outline
SOT-23-5
Dimensions in mm
2.92
±0.1
1.6
2.8
±0.1
± 0.1
10
0.127 +0.05/-0.02
1.9±0.1
12
R0.15MAX
0.95 ±0.1
0.35±0.05
R0.15MAX
0.06
12
± 0.05
0.65
±0.1
1.1
±0.1
10
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Rev.1 -- 11 December 2017
SL9350 Series
Package Outline
DFN1x1-4L
Dimensions in mm
0.625 BSC
1±0.05
0.25±0.05
1±0.05
05
0.
0.
5±
0.
05
5±
0.
PIN1
PIN 1
0.225±0.05
TOP VIEW
0.125 BSC
+0.05
0.5±0.05
BOTTOM VIEW
SIDE VIEW
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Rev.1 -- 11 December 2017