Overview
The TPS62240DRVRG4 from Texas Instruments is a high-efficiency synchronous step-down DC-DC converter. It operates at a fixed switching frequency of 2.25 MHz and is designed to provide an output current of up to 300 mA. This device is available in a 2 x 2 WSON package and supports a wide input voltage range from 2 V to 6 V, making it suitable for various battery-powered applications, including those using Li-ion batteries and two- or three-cell alkaline batteries.
The converter features an adjustable output voltage range from 0.6 V to the input voltage, and it also comes in fixed output voltage versions (e.g., TPS62242 for 1.2 V and TPS62243 for 1.8 V). The device includes a power save mode that automatically transitions between pulse-width modulation (PWM) and pulse-frequency modulation (PFM) to maintain high efficiency over the entire load current range.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range (VIN) | 2 | 6 | V | |
| Output Current (IOUT) | 300 | mA | ||
| Switching Frequency (fSW) | 2 | 2.25 | 2.5 | MHz |
| Output Voltage Range (VOUT) | 0.6 | VIN | V | |
| High-Side MOSFET ON-Resistance (RDS(on)) | 240 | 480 | mΩ | |
| Low-Side MOSFET ON-Resistance (RDS(on)) | 180 | 380 | mΩ | |
| Operating Quiescent Current (IQ) | 18.5 | 3.8 | mA | |
| Shutdown Current (ISD) | 0.1 | 1 | μA | |
| Undervoltage Lockout Threshold (UVLO) | 1.85 | 1.95 | V | |
| Maximum Operating Junction Temperature (TJ) | -40 | 125 | °C |
Key Features
- High Efficiency: Greater than 94% efficiency, especially beneficial for battery-powered devices.
- Wide Input Voltage Range: Supports input voltages from 2 V to 6 V, suitable for Li-ion batteries and two- or three-cell alkaline batteries.
- Adjustable Output Voltage: Output voltage can be adjusted from 0.6 V to the input voltage using an external feedback divider.
- Fixed-Frequency Operation: Operates at a fixed switching frequency of 2.25 MHz.
- Power Save Mode: Automatically transitions between PWM and PFM modes to maintain high efficiency at light load currents.
- Low Output Voltage Ripple: Optimized for low output voltage ripple in PFM mode, making it suitable for low-noise applications.
- Mode Selection: The MODE pin allows selection between forced PWM mode and power save mode.
- Enable Pin: The EN pin can be used to control power sequencing and enable or disable the device.
Applications
- Battery-Powered Devices: Suitable for devices powered by Li-ion batteries, two-cell, and three-cell alkaline batteries.
- Portable Electronics: Ideal for use in portable electronics such as smartphones, tablets, and handheld devices.
- Industrial Automation: Can be used in industrial automation systems where high efficiency and reliability are crucial.
- Medical Devices: Suitable for medical devices that require high efficiency and low noise operation.
- Aerospace and Defense: Can be used in aerospace and defense applications due to its high reliability and efficiency.
Q & A
- What is the input voltage range of the TPS62240DRVRG4?
The input voltage range is from 2 V to 6 V.
- What is the maximum output current of the TPS62240DRVRG4?
The maximum output current is up to 300 mA.
- What is the switching frequency of the TPS62240DRVRG4?
The switching frequency is fixed at 2.25 MHz.
- How does the power save mode work in the TPS62240DRVRG4?
The power save mode automatically transitions between PWM and PFM modes to maintain high efficiency at light load currents.
- Can the output voltage of the TPS62240DRVRG4 be adjusted?
Yes, the output voltage can be adjusted from 0.6 V to the input voltage using an external feedback divider.
- What is the purpose of the MODE pin in the TPS62240DRVRG4?
The MODE pin allows selection between forced PWM mode and power save mode.
- How is the device enabled or disabled?
The device is enabled by setting the EN pin to high and disabled by setting it to low.
- What is the typical quiescent current in shutdown mode?
The typical quiescent current in shutdown mode is 0.1 μA to 1 μA.
- What is the maximum operating junction temperature of the TPS62240DRVRG4?
The maximum operating junction temperature is 125°C.
- What are some common applications of the TPS62240DRVRG4?
Common applications include battery-powered devices, portable electronics, industrial automation, medical devices, and aerospace and defense systems.
