TPS62840 Synchronous Buck Converter – Ultra-Low Power Switching Regulator by Texas Instruments
De TPS62840 is an ultra-low power, high-efficiency step-down converter designed by Texas Instrumenten for portable and battery-powered applications. Operating across a wide input voltage range of 1.8 V to 6.5 V, it delivers a fixed or adjustable output voltage as low as 0.6 V, making it ideal for powering modern low-voltage MCUs, sensors, and RF modules.
With its best-in-class quiescent current of 60 nA and support for selectable operating modes, the TPS62840 balances energy efficiency and performance under a variety of load conditions. This converter is widely used in industrial sensors, wearables, medical equipment, and smart meters, where maximizing battery runtime is essential.
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Power Efficiency and Design Flexibility
Engineered for energy-critical applications, the TPS62840 enables system designers to meet stringent power budgets while simplifying thermal design. Its compact 2 x 2 mm WSON-8 package allows for space-saving PCB layouts without compromising power performance.
One standout feature is the configurable MODE pin, which allows switching between forced PWM and power save mode (PSM) depending on system demand. This enables dynamic optimization of efficiency across load ranges, minimizing both active and standby power losses.
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Technical Parameters and Key Specifications
| Specificatie | Waarde |
|---|---|
| Ingangsspanningsbereik | 1.8 V to 6.5 V |
| Bereik uitgangsspanning | 0.6 V to 3.3 V |
| Uitgangsstroom | 750 mA |
| Ruststroom | 60 nA (typ) |
| Schakelfrequentie | 1.8 MHz |
| Efficiency | Up to 95% |
| Control Modes | PSM / PWM |
| Type verpakking | WSON-8 (2 x 2 mm) |
| Bedrijfstemperatuur | -40°C to 125°C |
Why Choose TPS62840 Over Conventional Buck Converters?
The TPS62840 offers superior power conversion efficiency at both light and heavy loads, significantly outperforming conventional converters that suffer under light-load conditions. Its 60 nA IQ enables designers to dramatically reduce standby current, which is critical for energy harvesting systems and battery-powered IoT sensors.
Unlike many competitors, it supports **true shutdown mode**, which disconnects the output from the input to avoid leakage and improve safety. Additionally, its integrated soft-start and under-voltage lockout (UVLO) features enhance reliability and circuit protection.
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With its proven performance and TI’s global application support, the TPS62840 is a strong choice for engineers building ultra-low-power platforms for industrial, medical, or consumer applications.
Typical Applications for the TPS62840 Buck Converter
- Wearable Devices: Powers sensors and processors efficiently to extend battery life in health monitors.
- Smart Meters: Reduces standby energy waste and ensures reliable voltage supply under dynamic load conditions.
- Industrial IoT Sensors: Enables long operating lifetime for field-deployed sensor nodes powered by coin cells.
- Medical Monitoring Systems: Supports regulated low-voltage supplies for patient-worn electronics.
- Energy Harvesting Devices: Helps maintain stable voltage rails under intermittent power sources.
About Texas Instruments – Powering the Next Generation
Texas Instrumenten (TI) continues to be a leader in analog and embedded semiconductors, driving innovation in energy-efficient power designs. The TPS62840 reflects TI’s investment in sustainable electronics, offering long-term product availability and global design-in support.
All TI power management ICs, including the TPS62840, undergo rigorous qualification to meet industrial-grade requirements and reliability expectations for mission-critical designs.
Veelgestelde vragen (FAQ)
1. What makes TPS62840 ideal for ultra-low power applications?
The converter’s ultra-low 60 nA quiescent current enables extended battery life, especially in systems that spend most of their time in standby or low-power states.
2. Can I use the TPS62840 with rechargeable batteries?
Yes, it supports input voltages starting at 1.8 V, making it compatible with lithium coin cells, single-cell Li-ion batteries, and energy harvesting power supplies.
3. What control modes does this buck converter support?
It features a selectable MODE pin for switching between Pulse Width Modulation (PWM) for performance and Power Save Mode (PSM) for light load efficiency.
4. How compact is the TPS62840 compared to similar parts?
With its 2 x 2 mm WSON package, it offers one of the smallest footprints in its class, making it ideal for space-constrained designs.
5. What protections are integrated into this device?
It includes under-voltage lockout, short-circuit protection, and a thermal shutdown feature to protect both the load and converter during faults.
