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ST1S03APUR データシート(PDF) 1 Page - STMicroelectronics

部品番号 ST1S03APUR
部品情報  1.5A, 1.5 MHz Adjustable, with inhibit function Step-down switching regulator in DFN6 3x3
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST1S03APUR データシート(HTML) 1 Page - STMicroelectronics

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May 2007
Rev. 3
1/14
14
ST1S03A
1.5A, 1.5 MHz Adjustable, with inhibit function
Step-down switching regulator in DFN6 3x3
Features
Step-down current mode PWM (1.5MHz) DC-
DC converter
2% DC output voltage tolerance
Internal soft start for start-up current limitation
and power on delay of 50-100µs
Typical efficiency: > 85%
Inhibit function
1.5A Output current capability
Not switching quiescent current: max 1.5mA
over temperature range
Switch VDS: max 200mV @ ISW=750mA
Uses tiny capacitors and inductors
Available in DFN6 3x3 exposed pad
Description
The ST1S03A is a step down DC-DC converter
optimized for powering low-voltage digital core in
HDD applications and, generally, to replace the
high current linear solution when the power
dissipation may cause an high heating of the
application environment. It provides up to 1.5A
over an input voltage range of 3V to 5.5V. An high
switching frequency (1.5MHz) allows the use of
tiny surface-mount components: as well as the
resistor divider to set the output voltage value,
only an inductor, a schottky diode and two
capacitors are required. Besides, a low output
ripple is guaranteed by the current mode PWM
topology and by the use of low E.S.R. SMD
ceramic capacitors. The device is thermal
protected and current limited to prevent damages
due to accidental short circuit. The ST1S03A is
available in DFN6 (3x3).
www.st.com
DFN6 (3x3)
Order codes
Part number
Packaging
Package
ST1S03APMR
Tape & reel
DFN6 (3x3 mm)
ST1S03AIPMR
Tape & reel
DFN6 (3x3 mm)
ST1S03APUR
Tape & reel
DFN6D (3x3 mm)
ST1S03AIPUR
Tape & reel
DFN6D (3x3 mm)


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