Overview
The PTH04070W, produced by Texas Instruments, is a highly integrated, low-cost switching regulator module designed to deliver up to 3 A of output current. This module is notable for its high efficiency, low power dissipation, and compact size, making it an attractive choice for various applications. It operates within an input voltage range of 3 V to 5.5 V, allowing it to step down to voltages as low as 0.9 V from a 5-V input bus. The module features state-of-the-art switched-mode power-conversion technology, eliminating the need for a heat sink due to its low power dissipation.
The PTH04070W is available in both through-hole and surface-mount package options, including tape and reel configurations. It includes several operating features such as undervoltage lockout (UVLO), on/off inhibit, output overcurrent protection, and overtemperature protection, ensuring reliable operation across a wide range of conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage (VI) | 3 | 5.5 | V | |
| Output Current (IO) | 0 | 3 | A | |
| Operating Free-Air Temperature (TA) | -40 | 85 | °C | |
| Output Voltage Range (VO) | 0.9 | 3.6 | V | |
| Set-Point Voltage Tolerance (VO(tol)) | ±2% | %VO | ||
| Temperature Variation | ±0.5% | %VO | ||
| Line Regulation | ±1 mV | |||
| Load Regulation | ±5 mV | |||
| Total Output Voltage Variation | ±3% | %VO | ||
| Weight | 1.5 grams | |||
| Flammability | Meets UL 94 V-O |
Key Features
- High efficiency up to 94%
- Adjustable output voltage from 0.9 V to 3.6 V using a single external resistor
- On/off inhibit control for output voltage management
- Undervoltage lockout (UVLO) for input voltage protection
- Output overcurrent protection (non-latching, auto-reset)
- Overtemperature protection to prevent thermal damage
- Compact size (0.5 × 0.4 in) suitable for space-constrained applications
- Available in both through-hole and surface-mount package options
- Soft-start circuitry to limit in-rush current during power-up
Applications
The PTH04070W is suitable for a variety of applications due to its high efficiency, compact size, and robust feature set. Key application areas include:
- Telecommunications equipment
- Test and measurement instruments
- High-end consumer electronics
Q & A
- What is the input voltage range of the PTH04070W?
The input voltage range is from 3 V to 5.5 V.
- What is the maximum output current of the PTH04070W?
The maximum output current is 3 A at 85°C.
- How is the output voltage adjusted on the PTH04070W?
The output voltage can be adjusted using a single external resistor connected between the VOAdjust pin and GND.
- What safety features does the PTH04070W include?
The module includes undervoltage lockout (UVLO), output overcurrent protection, and overtemperature protection.
- What is the operating temperature range of the PTH04070W?
The operating temperature range is from -40°C to 85°C.
- Does the PTH04070W require a heat sink?
No, the module does not require a heat sink due to its low power dissipation.
- What package options are available for the PTH04070W?
The module is available in both through-hole and surface-mount package options, including tape and reel configurations.
- How does the on/off inhibit control work on the PTH04070W?
The on/off inhibit control allows the output voltage to be turned off by applying a low-level ground signal to the Inhibit pin.
- What is the purpose of the soft-start circuitry in the PTH04070W?
The soft-start circuitry limits the in-rush current during power-up, introducing a short time delay to prevent excessive current draw.
- What are some typical applications for the PTH04070W?
Typical applications include telecommunications equipment, test and measurement instruments, and high-end consumer electronics.
