17V, 2A Synchronous Step-Down Regulator with 3.5μA Quiescent Current

The LTC3624/LTC3624-2 is a high efficiency 17V, 2A synchronous monolithic step-down regulator. The switching frequency is fixed to 1MHz (LTC3624) or 2.25MHz (LTC3624-2) with a ±40% synchronization range. The regulator features ultralow quiescent current and high efficiency over a wide VOUT range.

The step-down regulator operates from an input voltage range of 2.7V to 17V and provides an adjustable output range from 0.6V to VIN while delivering up to 2A of output current. A user-selectable mode input is provided to allow the user to trade off ripple noise for light load efficiency; Burst Mode operation provides the highest efficiency at light loads, while pulse-skipping mode provides the lowest voltage ripple. The MODE pin can also be used to sync the switching frequency to an external clock.

LTC3624/LTC3624-2 Options

Part Number

Frequency

VOUT

LTC3624

1MHz

Adjustable

LTC3624-3.3

1MHz

3.3V

LTC3624-5

1MHz

5V

LTC3624-2

2.25MHz

Adjustable

LTC3624-23.3

2.25MHz

3.3

LTC3624-25

2.25MHz

5V

Applications

* Battery Powered Equipment

* Portable Instrumentation

* Emergency Radios

* General Purpose Step-Down Supplies

* Wide VIN Range: 2.7V to 17V* Wide VOUT Range: 0.6V to VIN* 95% Max Efficiency* Low IQ: 3.5μA, Zero-Current Shutdown* Constant Frequency (1MHz/2.25MHz)* Fixed VOUT Options Available* Low Dropout Operation (100% Duty Cycle) with Ultralow IQ* 2A Rated Output Current