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ST1S30IPUR Arkusz danych(PDF) 1 Page - STMicroelectronics

Numer części ST1S30IPUR
Szczegółowy opis  3 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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September 2010
Doc ID 17927 Rev 1
1/11
11
ST1S30
3 A, 1.5 MHz PWM step-down switching regulator
with synchronous rectification
Features
1.5 MHz fixed frequency PWM with current
control mode
3 A output current capability
Typical efficiency: > 90%
2 % DC output voltage tolerance
Two versions available: power good or inhibit
Integrated output over-voltage protection
Non switching quiescent current: (typ) 1.5 mA
over temperature range
RDSon (typ) 100 mΩ
Utilizes tiny capacitors and inductors
Operating junction temp. -25 °C to 125 °C
Available in DFN8 (4 x 4 mm) exposed pad
Description
The ST1S30 is a step-down DC-DC converter
optimized for powering low output voltage
applications. It supplies a current in excess of 3 A
over an input voltage range from 2.7 V to 6 V.
A high PWM switching frequency (1.5 MHz)
allows the use of tiny surface-mount components.
Moreover, since the required synchronous
rectifier is integrated, the number of the external
components is reduced to minimum: a resistor
divider, an inductor and two capacitors. The
Power Good function continuously monitors the
output voltage. An open drain Power Good flag is
released when the output voltage is within
regulation. In addition, a low output ripple is
guaranteed by the current mode PWM topology
and by the use of low ESR SMD ceramic
capacitors. The device is thermally protected and
the output current limited to prevent damages due
to accidental short circuit. The ST1S30 is
available in the DFN8 (4 x 4 mm) package.
DFN8 (4 x 4 mm)
Table 1.
Device summary
Order codes
Package
Note
ST1S30PUR (1)
DFN8 (4 x 4 mm)
PG version
ST1S30IPUR
INHIBIT version
1.
Available on request.
www.st.com


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