Overview
The TPS62120DCNT from Texas Instruments is a highly efficient synchronous step-down DC-DC converter optimized for low-power applications. This device supports up to 75-mA output current and operates within a wide input voltage range of 2 V to 15 V, making it suitable for various power sources including energy harvesting, battery-powered, and line-powered systems.
The converter features an advanced hysteretic control scheme that switches between pulse frequency modulation (PFM) and pulse width modulation (PWM) modes to maintain high efficiency across the entire load current range. It also includes power save mode with a low quiescent current of 11 µA, ensuring minimal power consumption during light loads.
The TPS62120DCNT is available in a small 8-pin SOT-23 package, making it ideal for space-constrained designs. It also includes features such as internal soft start, power good open-drain output, and an open-drain output for output discharge during shutdown.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2 V to 15 V |
| Output Current | Up to 75 mA |
| Output Voltage Range | 1.2 V to 5.5 V |
| Efficiency | Up to 96% |
| Switch Frequency | Up to 800 kHz |
| Quiescent Current in PFM Mode | 10 µA |
| Package Type | 8-pin SOT-23 |
| Operating Temperature Range | -40°C to 85°C |
| UVLO Thresholds | 2.5 V Rising, 1.85 V Falling |
Key Features
- Advanced hysteretic control scheme for high efficiency in both PFM and PWM modes.
- Power save mode with 11-µA quiescent current to minimize power consumption at light loads.
- Synchronous converter with no external rectifier required.
- Low output ripple voltage for reduced noise.
- 100% duty cycle for lowest dropout voltage.
- Internal soft start to prevent inrush current.
- Power good open-drain output to indicate when the output voltage is in regulation.
- Open-drain output for output discharge during shutdown.
- Small package size (8-pin SOT-23) suitable for space-constrained designs.
Applications
- Low power RF applications.
- Ultra-low power microprocessors.
- Energy harvesting systems.
- Industrial measuring devices.
- Battery-powered devices.
- 9-V or 12-V line-powered applications.
Q & A
- What is the input voltage range of the TPS62120DCNT?
The input voltage range is from 2 V to 15 V.
- What is the maximum output current of the TPS62120DCNT?
The maximum output current is up to 75 mA.
- What is the efficiency of the TPS62120DCNT?
The efficiency can be up to 96%.
- What is the switch frequency of the TPS62120DCNT?
The switch frequency can be up to 800 kHz.
- What is the quiescent current in PFM mode?
The quiescent current in PFM mode is typically 10 µA.
- What package types are available for the TPS62120DCNT?
The device is available in an 8-pin SOT-23 package.
- What is the operating temperature range of the TPS62120DCNT?
The operating temperature range is from -40°C to 85°C.
- What are the UVLO thresholds for the TPS62120DCNT?
The UVLO thresholds are 2.5 V rising and 1.85 V falling.
- Does the TPS62120DCNT have a power good output?
Yes, it has an open-drain power good output that indicates when the output voltage is in regulation.
- How does the TPS62120DCNT handle output discharge during shutdown?
The device has an open-drain output that connects the SGND pin to GND during shutdown mode to discharge the output capacitor.
