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SC250WLTRT Datasheet(PDF) 7 Page - Semtech Corporation

Part # SC250WLTRT
Description  Step-Down DC-DC Converter with Bias LDO for RF Power Amplifi ers
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC250WLTRT Datasheet(HTML) 7 Page - Semtech Corporation

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© 2006 Semtech Corp.
www.semtech.com
SC250
PRELIMINARY
POWER MANAGEMENT
Pin Descriptions
Pin #
Pin Name
Pin Function
1LX
Inductor connection to the switching FETs
2
VIN
Input voltage connection
3
VREF
2.85V, 20mA reference supply
can be used as a supply for power amplifier bias inputs or
to supply a resistive divider on V
DAC to set a fixed level of VOUT.
4
GND
Ground connection
5
VDAC
Analog control voltage input ranges between 0.1 and 1.2V for control of V
OUT in accordance
with the V
OUT= 3 x VDAC transfer function. VDAC > 1.4V enables pass-through mode using
the internal pass MOSFET.
6
VOUT
Regulated output voltage and feedback
7EN
Enable digital input: a high input enables the SC250, a low disables the output and
reduces quiescent current to less than 1μA and LX becomes high impedance.
8
PGND
Ground reference for internal N-channel MOSFET


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