WL9100
36V,1.5μA IQ,150mA Low-Dropout Linear Voltage Regulator
Features
• Low Power Consumption: 1.5µA (Typ)
• Maximum Output Current: 150mA
• Small Dropout Voltage
•
•
•
•
•
•
300mV@100mA (Vout=3.3V)
• High Input Voltage: Up to 36V
• High Accurate:
Good Transient Response
Integrated Short-Circuit Protection
Over-Temperature Protection
Output Current Limit
Stable with Ceramic Capacitor
Support Fixed Output Voltage
1.8,2.5,2.8.3.0,3.3,3.6,4.0,4.2 and 5.0V
WL9100 (B) ±2% Output Voltage
• Available Package
WL9100(A) ±1% Output Voltage
• RoHS Compliant and Lead (Pb) Free
SOT23-3 \ SOT89-3
Application
• Portable, Battery Powered Equipment
• Battery-powered equipment
• Weighting Scales
• Smoke detector and sensor
• Audio/Video Equipmen
• Home Automation
Description
The WL9100 series is a high voltage,ultralow-power,low dropout voltage regulator. The device
can deliver 150mA output current with a dropout voltage of 300mV and allows an input voltage as
high as 36V. The typical quiescent current is only 1.5µA. The device is available in fixed output
voltages of 1.8,2.5,2.8,3.0,3.3,3.6,4.0,4.2,4.4 and 5.0V.The device features integrated shortcircuit and thermal shutdown protection.Although designed primarily as fixed voltage
regulators, the device can be used with external components to obtain variable voltages.
Application Circuits
VIN
VIN
VOUT
VOUT
GND
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10uF
10uF
CIN
COUT
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WL9100
36V;1.5μA IQ,150mA Low-Dropout Linear Voltage Regulator
Pin Configuration
SOT23-3L
2
SOT23-3L
2
1
3
WL9100S3-XX
SOT23-3L
2
1
3
WL9100SA-XX
SOT89-3L
1
2
3
WL9100P3-XX
1
3
WL9100SB-XX
SOT23-3L
2
1
3
WL9100SC-XX
SOT89-3L
SOT89-3L
SOT89-3L
1
2
3
WL9100PA-XX
1
2
3
WL9100PB-XX
1
2
3
WL9100PC-XX
Pin Description
SOT23-3L Pin No.
Pin Name
Pin Function
WL9100S3-XX
WL9100SA-XX*
WL9100SB-XX*
WL9100SC-XX*
1
3
2
2
GND
Ground.
2
2
1
3
VIN
Supply voltage input
3
1
3
1
VOUT
Voltage Output
Pin Name
Pin Function
SOT89-3L Pin No.
WL9100P3-XX
WL9100PA-XX*
WL9100PB-XX*
WL9100PC-XX*
1
3
2
2
GND
Ground.
2
2
1
3
VIN
Supply voltage input
3
1
3
1
VOUT
Voltage Output
NOTE: (*) It needs to be customized
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WL9100
36V;1.5μA IQ,150mA Low-Dropout Linear Voltage Regulator
Order Information
AS9100①②-③④⑤
Designator
Symbol
Description
①②
S3/P3
SOT23-3L / SOT89-3L
③④
Integer
⑤
Model
Output Voltage 1.8,2.5,2.8.3.0,3.3,3.6,4.0,4.2 and 5.0V
A
Accurate ±1%
B
Accurate ±2%
Marking
WL9100S3-XX* AFXXA(B)
WL9100P3-XX* AFXXA(B)
Description
Package
T/R Qty
WL9100 36V,1.5µA IQ,
150mA Low-Dropout LDO
SOT23-3L
3,000 PCS
SOT89-3L
1,000 PCS
Note:(*) XX Represents the Output Voltage
Marking Information ①②③④⑤
①②Represents the product name
Mark ①②
AF
Product Series
WL9100 S3 / P3
③④Represents the Output Voltage
Mark
Output Voltage (V)
18
25
28
1.8
2.5
2.8
——
——
——
Mark
——
——
——
30
——
3.0
——
33
——
3.3
——
⑤Represents the Output Voltage Accurate
Mark⑤
36
——
3.6
——
40
42
——
——
4.0
4.2
——
——
50
——
——
——
5.0
——
——
——
Product Series
±1% Output Voltage
±2% Output Voltage
A
B
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Output Voltage (V)
WL9100 (A or B)
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WL9100
36V;1.5μA IQ,150mA Low-Dropout Linear Voltage Regulator
Absolute Maximum Ratings
(1) (2)
Parameter
Symbol
Maximum Rating
Unit
Input Voltage
VIN
VOUT
VSS -0.3~VSS+42.0
VSS -0.3~VSS+6.0
V
V
Output Current
IOUT
150
mA
Power Dissipation
Thermal Resistance
SOT23-3
400
Pd
SOT89-3
SOT23-3
500
RθJA
SOT89-3
(3)
mW
250
℃/W
200
℃/W
Operating Temperature
Topr
-40~85
℃
Storage Temperature
Tstg
-40~125
℃
Soldering Temperature & Time
Tsolder
260℃, 10s
Note (1): Exceeding these ratings may damage the device.
Note (2): The device is not guaranteed to function outside of its operating conditions
Note (3): The package thermal impedance is calculated in accordance to JESD 51-7.
ESD Ratings
Item
V(ESD-HBM)
V(ESD-CDM)
ILATCH-UP
Description
Human Body Model (HBM)
ANSI/ESDA/JEDEC JS-001-2014
Classification, Class: 2
Value
Unit
±4000
V
±100
V
±150
mA
Charged Device Mode (CDM)
ANSI/ESDA/JEDEC JS-002-2014
Classification, Class: C0b
JEDEC STANDARD NO.78E APRIL 2016
Temperature Classification, Class: I
ESD testing is performed according to the respective JESD22 JEDEC standard.The human body model is a 100 pF capacitor discharged
through a 1.5kΩ resistor into each pin. The machine model is a 200pF capacitor discharged directly into each pin.
Recommended Operating Conditions
Parameter
MIN.
MAX.
Units
Supply voltage at VIN
3.0
12
V
Operating junction temperature range, Tj
-40
125
°C
Operating free air temperature range, TA
-40
85
°C
Note : All limits specified at room temperature (TA = 25°C) unless otherwise specified. All room temperature limits are 100% production
tested. All limits at temperature extremes are ensured through correlation using standard Statistical Quality Control (SQC) methods. All
limits are used to calculate Average Outgoing Quality Level (AOQL).
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WL9100
36V;1.5μA IQ,150mA Low-Dropout Linear Voltage Regulator
Electrical Characteristics
(Test Conditions:VIN=12V, VOUT=Vset,CIN=10uF, COUT=10uF,TA=25℃, unless otherwise specified.)
Parameter
Symbol
Input Voltage
VIN
Supply Current
IQ
Output Voltage
WL9100 (A)
Output Voltage
WL9100 (B)
Maximum Output
Current
Dropout Voltage
VOUT1
Typ
3.0
VIN=12V
ILOAD=0mA
VIN=12V
IOUT=10mA
Max
Units
36
V
—
1.5
3.0
uA
Vset*0.99
Vset
Vset*1.01
V
VIN=12V
IOUT=10mA
Vset*0.98
Vset
Vset*1.02
V
IOUT(Max)
—
—
150
—
mA
VDROP
IOUT=150mA
—
550
—
VOUT=3.0V
IOUT=100mA
IOUT=150mA
IOUT=100mA
—
—
—
330
500
300
—
—
—
IOUT=150mA
IOUT=100mA
IOUT=10mA
(Vset+2.0v)≦VIN≦24V
—
—
520
300
—
—
—
0.15
—
%/V
—
45
—
mV
VDROP
VOUT=3.3V
VOUT=5.0V
Line Regulation
ΔVOUT/
ΔVIN•VOUT
Load Regulation
ΔVOUT
Short Current
ISHORT
Output Noise
Voltage
eNO
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Min
VOUT2
VDROP
Output Voltage
Temperature
Coefficient
Conditions
ΔVOUT/
ΔT•VOUT
VIN=10V
1mA≦IOUT≦150mA
mV
80
mA
IOUT=50mA
BW = 300Hz~50kHz
50
uVRMS
IOUT=10mA
100
ppm/℃
RL=1Ω
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WL9100
36V;1.5μA IQ,150mA Low-Dropout Linear Voltage Regulator
Function Block Diagram
Application Guideline
Input Capacitor
A 10μF ceramic capacitor is recommended to connect between VDD and GND pins to decouple input
power supply glitch and noise. The amount of the capacitance may be increased without limit. This
input capacitor must be located as close as possible to the device to assure input stability and less
noise. For PCB layout, a wide copper trace is required for both VIN and GND.
Output Capacitor
An output capacitor is required for the stability of the LDO. The recommended output capacitance is
10μF, ceramic capacitor is recommended, and temperature characteristics are X7R or X5R. Higher
capacitance values help to improve load/line transient response. The output capacitance may be
increased to keep low undershoot/overshoot. Place output capacitor as close as possible to VOUT
and GND pins.
Dropout Voltage
The dropout voltage refers to the voltage difference between the VIN and VOUT pins while operating
at specific output current. The dropout voltage VDROP also can be expressed as the voltage drop on
the pass-FET at specific output current (IRATED) while the pass-FET is fully operating at ohmic
region and the pass-FET can be characterized asan resistance RDS(ON). Thus the dropout voltage
can bedefined as (VDROP = VIN − VOUT = RDS(ON) x IRATED). Fornormal operation, the
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WL9100
36V;1.5μA IQ,150mA Low-Dropout Linear Voltage Regulator
suggested LDO operating range is (VIN > VOUT + VDROP) for good transient response and PSRR
ability. Vice versa, while operating at the ohmic region will degrade the performance severely.
Thermal Application
For continuous operation, do not exceed the absolute maximum junction temperature. The maximum
power dissipation depends on the thermal resistance of the IC package, PCB layout, rate of
surrounding airflow, and difference between junction and ambient temperature. The maximum power
dissipation can be calculated as below: TA=25°C, PCB,
The max PD= (125°C − 25°C) / (Thermal Resistance °C/W)
Power dissipation (PD) is equal to the product of the output current and the voltage drop across the
output pass element, as shown in the equation below:
PD = (VIN – VOUT) × IOUT
Layout Consideration
By placing input and output capacitors on the same side of the PCB as the LDO, and placing them as
close as is practical to the package can achieve the best performance. The ground connections for
input and output capacitors must be back to the WL9100 ground pin using as wide and as short of
a copper trace as is practical.Connections using long trace lengths, narrow trace widths, and/
or connections through via must be avoided. These add parasitic inductances and resistance
that results in worse performance especially during transient conditions.
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WL9100
36V;1.5μA IQ,150mA Low-Dropout Linear Voltage Regulator
Packaging Information
SOT23-3L
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WL9100
36V;1.5μA IQ,150mA Low-Dropout Linear Voltage Regulator
Packaging Information
SOT89-3L
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