L5972D Up to 1.5 A step down switching regulator
The L5972D is a step down monolithic power switching regulator with a minimum switch current limit of 2A so it is able to deliver more than 1.5A DC current to the load depending on the application conditions.
The output voltage can be set from 1.235V to 35V.
The device uses an internal P-Channel D-MOS transistor (with a typical Rdson of 250mΩ) as switching element to minimize the size of the external components.
An internal oscillator fixes the switching frequency at 250kHz.
Having a minimum input voltage of 4.4V only, it is particularly suitable for 5V bus, available in all computer related applications.
Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection
技术特性
- 2A internal switch
- Operating input voltage from 4.4V to 36V
- Output voltage adjustable from 1.235V to 35V
- Low dropout operation: 100% duty cycle
- 250kHz Internally fixed frequency
- Voltage feedforward
- Zero load current operation
- Internal current limiting
- Protection against feedback disconnection
- Thermal shutdown
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应用领域
- Consumer: STB, DVD, TV, VCR, car radio,
LCD monitors
- Networking: XDSL, modems, DC-DC modules
- Computer: printers, audio/graphic cards,
optical storage, hard disk drive
- Industrial: changers, car battery, DC-DC
converters
管脚定义图
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L5972D 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 |
| L5972D013TR |
Active |
|
1000 |
SO-8 |
Tape And Reel |
|
|
| L5972D |
Active |
|
1000 |
SO-8 |
Tube |
|
|
DATASHEET
| 描述 |
版本 |
大小 |
| L5972D : 2A switch step down switching regulator |
10 |
247KB |
APPLICATION NOTES
| 描述 |
版本 |
大小 |
| AN1517: Designing with the L5972D high efficiency DC-DC converter |
2 |
825KB |
DESIGN NOTES
| 描述 |
版本 |
大小 |
| DN0011: ST1S03 alternative topology: Using a buck in a negative buck-boost configuration |
1.0 |
360KB |
USER MANUALS
| 描述 |
版本 |
大小 |
| UM0432: Low voltage motor control demonstration board based on ST7MC MCU |
2 |
906KB |
SCHEMATIC PACKS
| 描述 |
版本 |
大小 |
| Board Schematic |
1.0 |
8KB |
