42V, 750mA Synchronous Step-Down Regulator with 2.5μA Quiescent Current

The LT8607 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 1.7µA of non-switching quiescent current. The LT8607 can deliver 750mA of continuous current. Low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10mVP-P. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V threshold and can be used to program VIN undervoltage lockout or to shut down the LT8607 reducing the input supply current to 1µA.

The MSOP package includes a SYNC pin to synchronize to an external clock, or to select Burst Mode operation or pulse-skipping with or without spread spectrum; the TR/SS pin programs soft-start or tracking. The DFN package omits these pins and can be purchased in pulse-skipping or Burst Mode operation.

Part Number

Package

Output Voltage

Synch Functionality

LT8607MSE

MSE

Programmable

Programmable

LT8607-5MSE

MSE

Fixed 5V Out

Programmable

LT8607DFN

DFN

Programmable

Burst Mode Operation

LT8607BDFN

DFN

Programmable

Pulse-Skipping Mode

Applications

* General Purpose Step Down Converter

* Low EMI Step Down

* Wide Input Voltage Range: 3.0V to 42V

* Ultralow Quiescent Current Burst Mode® Operation:

* <3µA IQ Regulating 12VIN to 3.3VOUT

* Output Ripple <10mVP-P

* High Efficiency 2MHz Synchronous Operation

* >93% Efficiency at 0.5A, 12VIN to 5VOUT

* 750mA Maximum Continuous Output

* Fast Minimum Switch-On Time: 35ns

* Adjustable and Synchronizable: 200kHz to 2.2MHz