Overview
The PTH04070WAD is a highly integrated, low-cost switching regulator module produced by Texas Instruments. This module delivers up to 3 A of output current and is designed to operate efficiently with minimal power dissipation, eliminating the need for a heat sink. It is available in both through-hole and surface-mount package options, making it suitable for a variety of applications. The module's small size (0.5 × 0.4 in) and high efficiency make it an attractive choice for telecommunications, test and measurement applications, and high-end consumer products.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 3 | 5.5 | V | |
| Output Current | 0 | 3 | A | |
| Output Voltage Range | 0.9 | 3.6 | V | |
| Operating Free-Air Temperature | -40 | 85 | °C | |
| Efficiency | Up to 94% | % | ||
| Power Dissipation | < 1 W | W | ||
| Weight | 1.5 grams | grams | ||
| Flammability | Meets UL 94 V-O |
Key Features
- Up to 3 A of output current at 85°C.
- Input voltage range from 3 V to 5.5 V, allowing operation from either a 3.3-V or 5-V input bus.
- Output voltage adjustable from 0.9 V to 3.6 V using a single external resistor.
- High efficiency up to 94% with minimal power dissipation.
- Undervoltage lockout (UVLO), on/off inhibit, output overcurrent protection (nonlatching, auto-reset), and overtemperature protection.
- Soft-start circuitry to limit in-rush current during power-up.
- Thermal shutdown protection to prevent overheating.
- Available in both through-hole and surface-mount package options.
Applications
The PTH04070WAD is suitable for various applications, including:
- Telecommunications
- Test and measurement applications
- High-end consumer products
Q & A
- What is the maximum output current of the PTH04070WAD?
The maximum output current is up to 3 A at 85°C.
- What is the input voltage range for the PTH04070WAD?
The input voltage range is from 3 V to 5.5 V.
- How is the output voltage adjusted on the PTH04070WAD?
The output voltage can be adjusted from 0.9 V to 3.6 V using a single external resistor connected between the VOAdjust and GND pins.
- What safety features does the PTH04070WAD include?
The module includes undervoltage lockout (UVLO), on/off inhibit, output overcurrent protection (nonlatching, auto-reset), and overtemperature protection.
- What is the operating temperature range of the PTH04070WAD?
The operating free-air temperature range is from -40°C to 85°C.
- How efficient is the PTH04070WAD?
The module has an efficiency of up to 94%.
- What type of protection does the PTH04070WAD have against overheating?
The module has thermal shutdown protection that shuts down the output if the junction temperature exceeds 150°C.
- How does the soft-start circuitry work in the PTH04070WAD?
The soft-start circuitry slows the rate at which the output voltage rises during power-up, limiting the in-rush current and introducing a short time delay (typically 10 ms).
- What is the purpose of the Inhibit pin on the PTH04070WAD?
The Inhibit pin is used to turn off the output voltage by applying a low-level ground signal, significantly reducing the input current drawn by the regulator.
- What are the recommended capacitors for the input and output of the PTH04070WAD?
A minimum of 47-μF ceramic capacitors is recommended for both the input and output, with optional additional electrolytic capacitors for improved response to load transients.
