STEVAL-ISA042V1: 1.2V @ 1.5A, 3 ~ 16V in
Summary
The ST1S03 is a step down DC-DC converter optimized for powering the low-voltage digital core in HDD applications and, generally, replacing the high current linear solution when the power dissipation may cause excessive heating of the application environment. It provides up to 1.5A over an input voltage range of 3V to 16V.
A high switching frequency (1.5MHz) allows the use of tiny surface-mount components, as well as the use of a 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 (3x3) package.
Specifications
| Manufacturer | STMicroelectronics |
|---|---|
| Category | AC/DC and DC/DC Conversion |
| Sub-Category | DC/DC SMPS - Single Output |
| Eval Board |
Board not Stocked
|
| Topology |
Step Down
|
| Outputs and Type |
1 Non-Isolated
|
| Voltage Out: Factory Set |
1.2 V
|
| Current Out |
1.5 A
|
| Voltage In |
3 ~ 16 V
|
| Efficiency @ Conditions |
>75%, 3V in, 1.2V @ 0.3 ~ 1.5 A
>71%, 5V in, 1.2V @ 0.3 ~ 1.5 A |
| Voltage Out Range |
- Not Given
|
| Features |
Current Limit (Adj. or Fixed)
Light Load Mode Short Circuit Protection Soft Start Thermal Protection |
| Switching Frequency |
1.5 MHz
|
| Standby Current [Typical] | |
| Quiescent Current [Typical] | |
| Component Count + Extras |
7 + 2
|
| Internal Switch |
Yes
|
| Design Author |
STMicroelectronics
|
| Application / Target Market |
FPGA / DSP / Processors
Point of Load (PoL) USB Powered Devices |
| Standby Current [Maximum] | |
| Quiescent Current [Maximum] |
2.5 mA
|
| Main I.C. Base Part |
ST1S03
|
| Date Created By Author | |
| Date Added To Library | 2011-03 |
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