L5970DUp to 1 A step down switching regulator
The L5970D is a step down monolithic power switching regulator capable to deliver up to 1A at output voltages from 1.2V 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.
- Up to 1A output current
- Operating input voltage from 4.4V to 36V
- 3.3V / (±2%) reference voltage
- Output voltage adjustable from 1.2V to 35V
- Low dropout operation: 100% duty cycle
- 250KHz Internally fixed frequency
- Voltage feedforward
- Zero load current operation
- Internal current limiting
- Inhibit for zero current consumption
- Protection against feedback disconnection
- Thermal shutdown
DS2027: Up to 1A step down switching regulator
AN1330: Designing with the L5970D 1A high efficiency DC-DC converter
AN2259: High intensity LED driver using the L5970D/L5973D
UM0432: Low voltage motor control demonstration board based on ST7MC MCU
Design Notes & Tips
DN0011: ST1S03 alternative topology: Using a buck in a negative buck-boost configuration
Sample & BuyTop
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