L5970AD Datasheet PDF - ST Microelectronics

●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 1.235 to 35V. The device uses an internal P-channel D-MOS transistor (with a typical RDSON of 200mR) 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. Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short-circuit protection.

● Inhibit for zero current consumption

● Internal current limiting

● Protection against feedback disconnection

● Synchronization

● Thermal shutdown

● Voltage feed-forward

● Zero load current operation

● Low dropout operation - 100% duty cycle

● 3.3V (±2%) Reference voltage