LTM4719

RECOMMENDED FOR NEW DESIGNS

42V Dual Input, Low Noise 150mA Step-Down μModule Regulator with I2C Battery Health Monitor

Analog Devices LTM4719 Product Info

10 February 2026 5

Features

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

200kHz to 2.2MHz Switching Frequency
Synchronization to an External Clock
Current Mode Control With 60ns Minimum On-time
Burst Mode® Operation, I_Q = 18.5μA
Programmable Input UVLO Thresholds and Discharge Alarm with Interrupt Output
Input Valid, Priority Channel, and PG Indicators
Available in a Compact 64-Pin BGA, 7mm × 7mm × 1.85mm Package

Part details & applications

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

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