Analog Devices Inc. LTM4719 µModule® (Micromodule) Regulators
Analog Devices LTM4719 µModule® (Micromodule) Regulators are 42V dual input, 150mA synchronous buck power µModule regulators with an integrated battery health monitor via I2C. The ultra-low quiescent current post-regulation linear regulator draws 560nA (typical) at no load and 42µA (typical) at full load, which is ideal for battery-operated portable equipment. The LTM4719 supports a seamless transition between two separate input power sources if one of the inputs is lost. The automatic switchover eliminates the requirement 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 ADI LTM4719 Regulators have a built-in precision coulomb counter (Q) accessible via an I2C interface. A discharge alarm threshold can be programmed. An interrupt signal is generated at the IRQ pin when the threshold is reached. 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.
Features
- Seamless and automatic transition between two input power sources
- Integrated battery health monitor
- 2.4V to 42V wide voltage range for dual inputs
- 1.8V to 5.5V battery health monitor input voltage
- 1V to 4.2V adjustable output range
- Up to 150mA continuous output current
- Integrated low-dropout linear regulator at 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, IQ = 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 x 7mm x 1.85mm package
Applications
- Portable battery-powered devices
- Radio, healthcare, and industrial test equipment
- Uninterruptible power supplies
Eval Board
Analog Devices Inc. EVAL-LTM4719-AZ Evaluation Board
Developed to quickly and easily demonstrate the LTM4719 buck power µModule® (micromodule) regulator.
TYPICAL APPLICATION
Switchover to Battery Power
