ST1S03 1.5 A, 1.5 MHz adjustable, step-down switching regulator
The ST1S03 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 1.5A over an input voltage range of 3V to 16V. An high switching frequency (1.5MHz) 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 ST1S03 is available in DFN6
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: > 70% over all operating conditions
- 1.5A output current capability
- Not switching quiescent current: max 2.5mA over temperature range
- Switch VDS: max 350mV @ ISW=750mA
- Uses tiny capacitors and inductors
- Available in DFN 3x3 exposed pad
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功能框图
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ST1S03 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 |
| ST1S03PUR |
Active |
|
1000 |
VFDFPN 6 3x3 |
Tape And Reel |
|
ST1S03PUR |
DATASHEET
| 描述 |
版本 |
大小 |
| ST1S03 : 1.5 A, 1.5 MHz adjustable, step-down switching regulator |
6 |
377KB |
APPLICATION NOTES
| 描述 |
版本 |
大小 |
| AN2093: ST1S03 buck converters for HDD power supplies |
2 |
234KB |
| AN2837: Positive to negative buck-boost converter using ST1S03 asynchronous switching regulator |
1 |
538KB |
DESIGN NOTES
| 描述 |
版本 |
大小 |
| DN0011: ST1S03 alternative topology: Using a buck in a negative buck-boost configuration |
1.0 |
360KB |
BOARDS AND TOOLS
| 型号 |
描述 |
| STEVAL-ISA042V2 |
1.5 A / 3.3 V step-down DC-DC converter demonstration board based on the ST1S03 |
| STEVAL-ISA042V1 |
1.5 A / 1.2 V step-down DC-DC converter demonstration board based on the ST1S03 |
