DatasheetsPDF.com

ST1S09

STMicroelectronics
Part Number ST1S09
Manufacturer STMicroelectronics
Description 1.5 MHz PWM step-down switching regulator
Published Jan 12, 2009
Detailed Description ST1S09 2A, 1.5 MHz PWM step-down switching regulator with synchronous rectification Features ■ 1.5MHz fixed frequency P...
Datasheet PDF File ST1S09 PDF File

ST1S09
ST1S09

Overview
ST1S09 2A, 1.
5 MHz PWM step-down switching regulator with synchronous rectification Features ■ 1.
5MHz fixed frequency PWM with current control mode ■ 2A output current capability www.
DataSheet4U.
com ■ 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.
5mA over temperature range RDSON (typ) 100mΩ Utilizes tiny capacitors and inductors Operating junction temp.
-30°C to 125°C Available in DFN6 3x3mm exposed pad 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 E.
S.
R.
SMD ceramic capacitors.
The device is thermally protected and the output current limited to prevent damages due to accidental short circuit.
The ST1S09 is available in the DFN6 3x3mm package.
DFN6 (3x3mm) Description The ST1S09 is a step-down DC-DC converter optimized for powering low output voltage applications.
It supplies a current in excess of 2A over an input voltage range from 2.
7V to 6V.
A high PWM switching frequency (1.
5MHz) allows the use of tiny surface-mount components.
Table 1.
Devices summary Order codes ST1S09PU ST1S09APU (1) Packaging ST1S09PUR ST1S09APUR ST1S09IPUR Package DFN6D (3x3 mm) DFN6D (3x3 mm) DFN6D (3x3 mm) ST1S09IPU 1.
Available on request.
July 2007 Rev.
2 1/18 www.
st.
com 18 ST1S09 Contents 1 2 3 4 www.
DataSheet4U.
com Diagram .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
3 Pin configuration .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
4 Maxim...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)