ST1S09 Synchronous rectification with inhibit, 2 A, 1.5 MHz adjustable, step-down switching regulator
The ST1S09 is a step-down DC-DC converter optimized for powering low output voltage applications. It supplies a current in excess of 2 A over an input voltage range from 2.7 V to 6 V.
A high PWM switching frequency (1.5 MHz) allows the use of tiny surface-mount components.
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 ESR 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 (3 x 3 mm) package
技术特性
- 1.5 MHz fixed frequency PWM with current control mode
- 2 A output current capability
- 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) 1.5 mA over temperature range
- RDSON (typ) 100 mΩ
- Utilizes tiny capacitors and inductors
- Operating junction temp. -30 °C to 125 °C
- Available in DFN6 (3 x 3 mm) exposed pad
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功能框图
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ST1S09 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 |
| ST1S09IPUR |
Active |
|
1000 |
VFDFPN 6 3x3 |
Tape And Reel |
|
ST1S09IPUR |
| ST1S09PUR |
Active |
|
1000 |
VFDFPN 6 3x3 |
Tape And Reel |
|
ST1S09PUR |
DATASHEET
| 描述 |
版本 |
大小 |
| ST1S09 : 2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification |
4 |
382KB |
DATA BRIEF
APPLICATION NOTES
| 描述 |
版本 |
大小 |
| AN2603: ST1S09 high efficiency synchronous buck converter |
3 |
692KB |
BOARDS AND TOOLS
| 型号 |
描述 |
| STEVAL-ISA046V1 |
2 A / 1.2 V high-efficiency synchronous buck converter evaluation board based on the ST1S09I with inhibit |
| STEVAL-ISA045V1 |
2 A / 1.2 V high-efficiency synchronous buck converter evaluation board based on the ST1S09 |
| STEVAL-ISA045V2 |
2 A / 3.3 V high-efficiency synchronous buck converter evaluation board based on the ST1S09 |
| STEVAL-ISA046V2 |
2 A / 3.3 V high-efficiency synchronous buck converter evaluation board based on the ST1S09I with inhibit |
