Overview
The TPS62740DSST from Texas Instruments is a highly efficient, ultra-low-power step-down DC-DC converter designed for low-power applications. This device features Texas Instruments' advanced DCS-Control™ topology, which combines the benefits of hysteretic and voltage mode control to achieve excellent AC load regulation, transient response, and low output ripple voltage. The TPS62740DSST operates with a quiescent current as low as 360nA, making it ideal for battery-powered devices and energy harvesting systems.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range (VIN) | 2.2 | - | 5.5 | V |
| Output Current (IOUT) | - | - | 300 | mA |
| Output Voltage Range (VOUT) | 1.8 | - | 3.3 | V |
| Quiescent Current (IQ) | - | 360 | - | nA |
| Switching Frequency | - | Up to 2 | - | MHz |
| Operating Junction Temperature Range | -40 | - | 125 | °C |
| Ambient Temperature Range | -40 | - | 85 | °C |
| Package Type | - | - | WSON (2x3 mm^2) | - |
Key Features
- Ultra-Low Quiescent Current: 360nA typical, making it suitable for low-power and battery-powered applications.
- DCS-Control™ Topology: Combines the advantages of hysteretic and voltage mode control for excellent AC load regulation and transient response.
- High Efficiency: Up to 90% efficiency at 10µA output current, extending high efficiency operation to very low load currents.
- Selectable Output Voltage: 16 selectable output voltages in 100mV steps from 1.8V to 3.3V using four VSEL pins.
- Low Output Ripple Voltage: Achieved with a small output capacitor.
- Automatic Transition to No Ripple 100% Mode: The device enters no ripple 100% mode when the battery voltage approaches the output voltage, preventing an increase in output ripple voltage.
- Slew Rate Controlled Load Switch: Provides a typ. 0.6Ω on-resistance and supports temporary distribution of the selected output voltage to a sub-system.
- Small Solution Size: Total solution size less than 31mm^2 with a tiny 2.2µH inductor and 10µF output capacitor.
Applications
- Bluetooth® Low Energy, RF4CE, Zigbee: Suitable for wireless communication devices due to its low power consumption and high efficiency.
- Industrial Metering: Ideal for metering applications requiring low power and high accuracy.
- Energy Harvesting: Optimized for energy harvesting systems where low power consumption is critical.
- Low Power MCU and RF Subsystems: Supports low power microcontrollers and RF subsystems in various applications.
- Sensors and IoT Devices: Suitable for sensor nodes and IoT devices that require ultra-low power consumption.
Q & A
- What is the input voltage range of the TPS62740DSST?
The input voltage range is from 2.2V to 5.5V.
- What is the typical quiescent current of the TPS62740DSST?
The typical quiescent current is 360nA.
- What are the selectable output voltages for the TPS62740DSST?
The output voltage can be selected in 100mV steps from 1.8V to 3.3V using four VSEL pins.
- What is the maximum output current of the TPS62740DSST?
The maximum output current is 300mA.
- What is the switching frequency range of the TPS62740DSST?
The switching frequency can go up to 2 MHz.
- How does the TPS62740DSST handle low load conditions?
The device enters no ripple 100% mode when the battery voltage approaches the output voltage, preventing an increase in output ripple voltage.
- What is the package type and size of the TPS62740DSST?
The device is available in a 12-pin WSON package with a size of 2x3 mm^2.
- What are some typical applications of the TPS62740DSST?
Typical applications include Bluetooth® Low Energy, RF4CE, Zigbee, industrial metering, energy harvesting, and low power MCU and RF subsystems.
- How does the DCS-Control™ topology benefit the TPS62740DSST?
The DCS-Control™ topology provides excellent AC load regulation, transient response, and low output ripple voltage, and supports a seamless transition between PFM and PWM modes.
- What is the operating junction temperature range of the TPS62740DSST?
The operating junction temperature range is from -40°C to 125°C.
