STEVAL-ISA044V2 STMicroelectronics, STEVAL-ISA044V2 Datasheet
STEVAL-ISA044V2
Manufacturer Part Number
STEVAL-ISA044V2
Description
BOARD EVAL BASED ON ST1S10
Manufacturer
STMicroelectronics
Type
DC/DC Switching Converters, Regulators & Controllersr
Specifications of STEVAL-ISA044V2
Mfg Application Notes
ST1S10 AppNote
Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Current - Output
3A
Voltage - Input
2.5 ~ 18V
Regulator Topology
Buck
Frequency - Switching
900kHz
Board Type
Fully Populated
Utilized Ic / Part
ST1S10
Input Voltage
2.5 V to 18 V
Product
Power Management Modules
Silicon Manufacturer
ST Micro
Silicon Core Number
ST1S10
Kit Application Type
Power Management - Voltage Regulator
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Power - Output
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
For Use With/related Products
ST1S10
Other names
497-8229
STEVAL-ISA044V2
STEVAL-ISA044V2
Features
■
■
■
■
■
■
Description
The ST1S10 is a step-down DC-DC converter
with inhibit function optimized for powering high
voltages in LCD applications and low voltage,
digital core HDD applications. It replaces the high
current linear solution when high power
dissipation is a problem. It provides up to 3 A over
an input voltage range of 2.5 V to 18 V, and
synchronous rectification removes the need for an
external Schottky diode. A high internal switching
frequency (900 kHz) allows for the use of tiny
surface-mount components, as well as the
resistor divider to set the output voltage value.
Only an inductor and 3 capacitors are required.
The current mode PWM architecture and stable
operation with low-ESR SMD ceramic capacitors
result in low output ripple. To maximize power
conversion efficiency in light load, the regulator
can work in burst mode automatically. The device
can operate in PWM mode with a fixed frequency
or synchronized to an external frequency. It
switches at a frequency of 900 kHz when the
SYNC pin is connected to ground or a fixed
voltage (less than 5.5 V), and can synchronize the
switching frequency between 400 kHz to 1.2 MHz
from external clock that is applied to SYNC pin. A
thermal shutdown circuit is integrated and
activates at 150 °C. Cycle-by-cycle current
limitation provides protection against shorted
outputs.
September 2009
For further information contact your local STMicroelectronics sales office.
Input voltage range: 2.5 V to 18 V
Max I
High internal switching frequency : 900 kHz
synchronized to an external frequency
between 400 kHz and 1.2 MHz
Inhibit pin available
Quiescent current : < 6 µA in inhibit state
PWM mode operation with a fixed frequency or
out
: 3 A
3 A synchronous 900 kHz step-down DC-DC converter
with inhibit function based on the ST1S10
Doc ID 14449 Rev 2
The quiescent current is less than 6 µA in inhibit
state. The device is available in MLP4x4 and
SO-8 ePad packages.
STEVAL-ISA044V2
STEVAL-ISA044V2
www.st.com
Data brief
1/4
4
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STEVAL-ISA044V2 Summary of contents
Page 1
... September 2009 For further information contact your local STMicroelectronics sales office. STEVAL-ISA044V2 with inhibit function based on the ST1S10 The quiescent current is less than 6 µA in inhibit state. The device is available in MLP4x4 and SO-8 ePad packages. Doc ID 14449 Rev 2 Data brief STEVAL-ISA044V2 www.st.com 1/4 4 ...
Page 2
... Circuit schematic 1 Circuit schematic Figure 1. Schematic 2/4 Doc ID 14449 Rev 2 STEVAL-ISA044V2 ...
Page 3
... STEVAL-ISA044V2 2 Revision history Table 1. Document revision history Date 11-Feb-2008 01-Sep-2009 Revision 1 Initial release. 2 Updated figure on cover page Doc ID 14449 Rev 2 Revision history Changes 3/4 ...
Page 4
... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 4/4 Please Read Carefully: © 2009 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 14449 Rev 2 STEVAL-ISA044V2 ...