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Datasheet
TPS62840DLCR – Buck Switching Regulator IC 750mA VSON-8
The TPS62840DLCR from Texas Instruments is an ultra-low-power, high-efficiency 750mA step-down (buck) converter optimized for battery-powered and energy-sensitive applications. Operating over an input voltage range of 1.8V to 6.5V, it supports a wide variety of power sources such as 1S–2S Li-Ion/Li-SOCl2, 2S–4S Alkaline, and 1S–2S Li-MnO2 batteries. Engineered with DCS-Control topology, the TPS62840 delivers clean, low-noise power suitable for RF systems and precision sensors. It operates at a typical switching frequency of 1.8MHz, allowing small external components while maintaining excellent transient response. With an ultra-low quiescent current of just 60nA, and only 120nA in 100% duty-cycle mode, the device maximizes battery life—even near the end of discharge. The converter automatically transitions between PFM and PWM modes to optimize efficiency across a wide load range. Additionally, the STOP mode completely halts switching to eliminate noise during sensitive measurements. Users can easily select from 16 predefined output voltages using a single resistor on the VSET pin, simplifying design and minimizing external components.
Key Features:
- Ultra-Low Power Operation: 60nA IQ (typ) and 25nA in shutdown mode.
- 100% Duty Cycle Mode: 120nA IQ for extended operation at low battery voltages.
- Wide Input Range: 1.8V to 6.5V, compatible with multiple battery chemistries.
- High Efficiency: Up to 80% efficiency even at 1µA load (3.6V input to 1.8V output).
- Adjustable Output Options: 16 selectable voltages via VSET pin.
- Output Current: Delivers up to 750mA continuous output.
- RF-Friendly DCS-Control: Ensures low noise and fast transient response.
- Flexible Operating Modes: Auto PFM/PWM transition or forced PWM for fixed-frequency operation.
- STOP Mode: Disables switching noise for precision measurement systems.
- Integrated Protections: Includes output discharge, thermal shutdown, and short-circuit protection.
- Compact Package: 8-pin VSON (2mmx2mm) for space-constrained designs.
