L5973AD Up to 1.5 A step down switching regulator
The L5973AD is a step down monolithic power switching regulator with a switch current limit of 2A so it is able to deliver more than 1.5 A DC current to the load depending on the application conditions.
The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an SO8 package with exposed frame, that allows to reduce the RthJA down to approximately 40 °C/W.
The device uses an internal P-Channel D-MOS transistor (with a typical of 200 mΩ) as switching element to avoid the use of bootstrap capacitor and guarantee high efficiency.
An internal oscillator fixes the switching frequency at 500 kHz to minimize the size of external components.
Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V 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
- 2 A Internal switch
- Operating input voltage from 4 V to 36 V
- 3.3 V / (±2 %) reference voltage
- Output voltage adjustable from 1.235 V to 35 V
- Low dropout operation: 100 % duty cycle
- 500 kHz 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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L5973AD 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 |
| L5973ADTR |
Active |
|
1000 |
PowerSO-8 |
Tape And Reel |
|
|
| L5973AD |
Active |
|
1000 |
PowerSO-8 |
Tube |
|
|
DATASHEET
| 描述 |
版本 |
大小 |
| L5973AD : 2 A switch step down switching regulator |
9 |
487KB |
APPLICATION NOTES
| 描述 |
版本 |
大小 |
| AN1723: Designing with L5973AD high efficiency DC-DC converter |
4 |
1118KB |
| AN2823: Current source for LED driving based on the L5973AD |
1 |
1575KB |
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 |
