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ST1S03 数据表(PDF) 1 Page - STMicroelectronics

部件名 ST1S03
功能描述  1.5A, 1.5 MHz adjustable, step-down switching regulator in DFN6
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST1S03 数据表(HTML) 1 Page - STMicroelectronics

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March 2007
Rev. 5
1/17
17
ST1S03
1.5A, 1.5 MHz adjustable, step-down switching regulator in DFN6
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: > 70% over all operating
conditions
1.5A Output current capability
Not switching quiescent current: max 2.5mA
over temperature range
Switch VDS: max 350mV @ ISW=750mA
Uses tiny capacitors and inductors
Available in DFN 3x3 exposed pad
Description
The ST1S03 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 16V. 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 ST1S03 is
available in DFN6.
DFN6 (3x3mm)
www.st.com
Order codes
Part number
Packaging
Package
ST1S03PM
ST1S03PMR
DFN6 (3x3 mm)
ST1S03PU
ST1S03PUR
DFN6D (3x3 mm)


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