Overview
The PTN78000WAST, produced by Texas Instruments, is a high-efficiency, step-down Integrated Switching Regulator (ISR) designed for a wide range of applications. This component is part of the PTN78000 series, which represents the third generation in the evolution of the popular 78ST100 series. It is smaller and lighter than its predecessors, offering improved thermal characteristics and compliance with RoHS and lead-free standards.
The PTN78000WAST operates from a wide-input voltage range of 7 V to 36 V, providing adjustable output voltages from 2.5 V to 12.6 V. It features an on/off inhibit function, undervoltage lockout, and overtemperature shutdown, making it suitable for various general-purpose, industrial, and automotive applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 7 | - | 36 | V |
| Output Voltage Range | 2.5 | - | 12.6 | V |
| Output Current | 0 | - | 1.5 | A |
| Set-point Voltage Tolerance | - | - | ±2% | - |
| Line Regulation | - | - | ±10 mV | - |
| Load Regulation | - | - | ±10 mV | - |
| Efficiency | - | - | Up to 95% | - |
| Operating Temperature | -40 | - | 85 | °C |
| Weight | - | - | 2 grams | - |
Key Features
- High-efficiency step-down voltage conversion with up to 95% efficiency.
- Wide-input voltage range of 7 V to 36 V.
- Adjustable output voltage from 2.5 V to 12.6 V.
- On/off inhibit function for power management.
- Undervoltage lockout and overtemperature shutdown for protection.
- Output current limit and transient response capabilities.
- Surface mount package available for ease of integration.
- Compliance with RoHS and lead-free standards.
Applications
- General-purpose industrial controls.
- HVAC systems.
- Test and measurement equipment.
- Medical instrumentation.
- AC/DC adaptors.
- Vehicles, marine, and avionics systems.
Q & A
- What is the input voltage range of the PTN78000WAST?
The input voltage range is from 7 V to 36 V.
- What is the adjustable output voltage range of the PTN78000WAST?
The output voltage can be adjusted from 2.5 V to 12.6 V.
- What is the maximum output current of the PTN78000WAST?
The maximum output current is 1.5 A.
- Does the PTN78000WAST have an on/off inhibit function?
- What are the operating temperature limits of the PTN78000WAST?
The operating temperature range is from -40°C to 85°C.
- Is the PTN78000WAST compliant with RoHS and lead-free standards?
- What type of package is available for the PTN78000WAST?
A surface mount package is available.
- What are some common applications of the PTN78000WAST?
It is used in general-purpose industrial controls, HVAC systems, test and measurement equipment, medical instrumentation, AC/DC adaptors, and vehicles, marine, and avionics systems.
- How is the output voltage adjusted on the PTN78000WAST?
The output voltage is adjusted using a single external resistor connected between the VO Adjust control (pin 4) and GND (pin 1).
- What are the minimum input capacitance requirements for the PTN78000WAST?
The minimum input capacitance is 2.2 µF.
