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PDF WD3133 Datasheet ( Hoja de datos )

Número de pieza WD3133
Descripción 1.2-MHz DC-DC STEP-UP CONVERTERS
Fabricantes WillSEMI 
Logotipo WillSEMI Logotipo

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WD3133 Hoja de datos, Descripción, Manual
WD3133
HIGH EFFICIENCY, 1.2-MHz DC-DC STEP-UP
CONVERTERS
Descriptions
The WD3133 is a high efficiency, high power, peak
current mode step-up converter. Internal 0.35Ω HV
power MOSFET with Min. 1A current limit. For portable
device with Li-ion battery application, WD3133 could
output typical 12V / 200mA ~300mA from 3.3V~5V
input.
The boost converter WD3133 runs in Pulse-Width
Modulation (PWM) mode, at 1.2MHz fixed switching
frequency to reduce output ripple, improve conversion
efficiency. It allows for the use of small external
components. At light load currents the converter enters
Skipping Mode to maintain a high efficiency over a
wide load current range. The build-in soft start circuitry
minimizes the inrush current at start-up.
The WD3133 is available in SOT-23-5L package.
Standard product is Pb-free and Halogen-free.
Features
Wide input voltage range from 2.7-V to 5.5-V
1.25-V (±2%) high accuracy reference voltage
1.2-MHz switching frequency
Up to 93% efficiency
Over 1-A (min.) power switch current limit
Provide typical 12V / 200mA~300mA output from
3.3V~5V input
Built-in Soft-Start
Applications
Smart Phones
Tablets
Portable games
PADs
WD3133
Http//:www.sh-willsemi.com
SOT-23-5L
LX 1
GND
2
FB 3
5 VIN
4 EN
Pin configuration (Top view)
54
3133
EAYW
1 23
3133 = Device code
EA = Special code
Y = Year code
W = Week code
Marking
Order information
Device
Package
Shipping
WD3133E-5/TR SOT-23-5L 3000/Reel&Tape
Will Semiconductor Ltd.
1 Aug, 2016 - Rev. 1.2

1 page

WD3133 pdf
Typical Characteristics
(Ta=25oC, VIN=3.6V, VEN=VIN, CIN=10μF, COUT=10μF, L=10μH, unless otherwise noted)
100 100
WD3133
90 90
80 80
70
60
50
0
L=22uH,V =9V
OUT
VIN=3.0V
V =3.6V
IN
VIN=4.2V
V =5.0V
IN
20 40 60 80 100 120
Output Current(mA)
70
60
50
0
L=10uH,V =9V
OUT
V =3.0V
IN
V =3.6V
IN
V =4.2V
IN
V =5.0V
IN
20 40 60 80 100 120
Output Current(mA)
Efficiency vs. Output Current
Efficiency vs. Output Current
100
90
80
70
60
50
0
L=22uH,V =12V
OUT
VIN=3.0V
V =3.6V
IN
VIN=4.2V
V =5.0V
IN
20 40 60 80 100 120
Output Current(mA)
Efficiency vs. Output Current
100
90
80
70
60
50
0
L=22uH,V =15V
OUT
VIN=3.0V
V =3.6V
IN
V =4.2V
IN
VIN=5.0V
20 40 60 80 100 120
Output Current(mA)
Efficiency vs. Output Current
100
90
80
70
60
50
0
L=10uH,VOUT=12V
V =3.0V
IN
VIN=3.6V
V =4.2V
IN
V =5.0V
IN
20 40 60 80 100 120
Output Current(mA)
Efficiency vs. Output Current
100
90
80
70
60
50
0
L=10uH,V =15V
OUT
VIN=3.0V
V =3.6V
IN
VIN=4.2V
V =5.0V
IN
20 40 60 80 100 120
Output Current(mA)
Efficiency vs. Output Current
Will Semiconductor Ltd.
5 Aug, 2016 - Rev. 1.2

5 Page

WD3133 arduino
Connect the sensitive analog circuitry (such as
voltage divider components) to analog ground.
Connect the power components (such as input
and output bypass capacitors) to power ground.
Connect the two ground planes together near
the load to reduce the effects of voltage
dropped on circuit board traces.
2. Locate CIN as close to the VDD pin as possible,
and use separate input bypass capacitors for
the analog.
3. Route the high current path from CIN, through L
to the LX and PGND pins as short as possible.
4. Keep high current traces as short and as wide
as possible.
5. The output filter of the boost converter is also
critical for layout. The Diode and Output
capacitors should be placed to minimize the
area of current loop through Output PGND
LX.
6. Avoid routing high impedance traces, such as
FB, near the high current traces and
components or near the Diode node (D). If high
impedance traces are routed near high current
and/or the LX node, place a ground plane
shield between the traces.
WD3133
Will Semiconductor Ltd.
11 Aug, 2016 - Rev. 1.2

11 Page


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