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ST1S03A

STMicroelectronics
Part Number ST1S03A
Manufacturer STMicroelectronics
Description step-down switching regulator
Published Jan 12, 2009
Detailed Description ST1S03A 1.5A, 1.5 MHz Adjustable, with inhibit function Step-down switching regulator in DFN6 3x3 Features ■ ■ Step-dow...
Datasheet PDF File ST1S03A PDF File

ST1S03A
ST1S03A

Overview
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) DCDC converter 2% DC output voltage tolerance 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 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).
DFN6 (3x3) ■ Internal www.
DataSheet4U.
com ■ ■ ■ ■ ■ ■ ■ 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 Order codes Part number ST1S03APMR ST1S03AIPMR ST1S03APUR ST1S03AIPUR May 2007 Packaging Tape & reel Tape & reel Tape & reel Tape & reel Rev.
3 Package DFN6 (3x3 mm) DFN6 (3x3 mm) DFN6D (3x3 mm) DFN6D (3x3 mm) 1/14 www.
st.
com 14 Contents ST1S03A Contents 1 2 3 4 www.
DataSheet4U.
com Diagram .
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3 Pin configuration .
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4 Maximum ratings .
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