42V Dual Input, Low Noise 150mA Step-Down μModule Regulator with IC Battery Health Monitor

The LTM4719 is a 42V dual input, 150mA synchronous buck power μModule® (micromodule) regulator with an integrated battery health monitor interfaced through I2C. The ultralow quiescent current post-regulation linear regulator draws 560nA (typical) at no load and a 42μA (typical) at full load, which is ideal for battery-operated portable equipment.

The LTM4719 supports seamless transition between two separate input power sources if one of the inputs is lost. The automatic switchover eliminates the need for holdup capacitors and minimizes disturbances on the output rail. The 18.5μA Burst Mode operation quiescent current makes the LTM4719 compatible with many applications.

The LTM4719 has a built-in precision coulomb counter (Q) accessible through an I2C interface. A discharge alarm threshold can be programmed. When the threshold is reached, an interrupt signal is generated at the IRQ pin. Battery voltage (V), battery impedance (Z), and temperature (T) are accessible through I2C. Fault protection features include input undervoltage lockout (UVLO), power good (PG), current limit, and overtemperature (OV) protection.

APPLICATIONS

* Portable Battery-Powered Devices

* Radio, Healthcare, and Industrial Test Equipment

* Uninterruptible Power Supplies

* Seamless and Automatic Transition between Two Input Power Sources

* Integrated Battery Health Monitor

* Wide Voltage Range for Dual Inputs: 2.4V to 42V

* Battery Health Monitor Input Voltage: 1.8V to 5.5V

* Adjustable Output Range: 1V to 4.2V

* Up to 150mA Continuous Output Current

* Integrated Low-Dropout Linear Regulator: 195mV at 150mA Load for Low Output Noise