L5970AD Up to 1 A step down switching regulator
The L5970AD is a step down monolithic power switching regulator with a switch current limit of 1.5A so it is able to deliver more than 1A 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 200mΩ) as switching element to avoid the use of bootstrap capacitor and guarantee high efficiency.
An internal oscillator fixes the switching frequency at 500KHz to minimize the size of external components. 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
- 1.5A INTERNAL SWITCH
- OPERATING INPUT VOLTAGE FROM 4.4V TO 36V
- 3.3V / (±2%) REFERENCE VOLTAGE
- OUTPUT VOLTAGE ADJUSTABLE FROM 1.235V TO 35V
- LOW DROPOUT OPERATION: 100% DUTY CYCLE
- 500KHz INTERNALLY FIXED FREQUENCY
- VOLTAGE FEEDFORWARD
- ZERO LOAD CURRENT OPERATION
- INTERNAL CURRENT LIMITING
- INHIBIT FOR ZERO CURRENT CONSUMPTION
- SYNCHRONIZATION
- PROTECTION AGAINST FEEDBACK DISCONNECTION
- THERMAL SHUTDOWN
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功能框图
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L5970AD 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 |
| L5970ADTR |
Active |
|
1000 |
SO-8 |
Tape And Reel |
|
|
| L5970AD |
Active |
|
1000 |
SO-8 |
Tube |
|
|
DATASHEET
| 描述 |
版本 |
大小 |
| L5970AD : 1.5A switch step down switching regulator |
1 |
140KB |
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 |
| UM0584: STEVAL-ISA031V1: 40 W SMPS with HV MOSFET and L6565 for three-phase industrial applications |
1 |
400KB |
SCHEMATIC PACKS
| 描述 |
版本 |
大小 |
| Board Schematic |
1.0 |
8KB |
