ST1S03A 1.5 A, 1.5 MHz adjustable, step-down switching regulator
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 dissipation may cause an high heating of the application environment. It provides up to 1.5 A over an input voltage range of 3 V to 5.5 V. An high switching frequency (1.5 MHz) 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 ESR SMD ceramic capacitors. The device is thermal protected and current limited to prevent damages due to accidental short circuit. The ST1S03A is available in DFN6D (3x3 mm).
技术特性
- Step-down current mode PWM (1.5MHz) DC-DC converter
- 2% DC output voltage tolerance
- Internal 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
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应用原理图
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ST1S03A 订购信息
| 订购型号 |
产品状态 |
美金价格 |
数量 |
封装 |
包装形式 |
温度范围 |
材料声明 |
| ST1S03APUR |
NRND |
|
1000 |
VFDFPN 6 3x3 |
Tape And Reel |
|
ST1S03APUR |
DATASHEET
| 描述 |
版本 |
大小 |
| ST1S03A : DS4724: 1.5 A, 1.5 MHz adjustable, with inhibit function step-down switching regulator |
6 |
257KB |
BOARDS AND TOOLS
| 型号 |
描述 |
| STEVAL-ISA047V2 |
1.5 A / 3.3 V step-down DC-DC converter demonstration board based on the ST1S03A |
| STEVAL-ISA047V1 |
1.5 A / 1.2 V step-down DC-DC converter demonstration board based on the ST1S03A |
