Overview
The PTN78000AAST is a high-efficiency, wide-input adjustable buck-boost switching regulator produced by Texas Instruments. This device is part of the third generation of the PT78NR100 series and is designed to be smaller and lighter with improved electrical and thermal performance. It operates from a wide input voltage range of 7 V to 29 V and can provide an adjustable negative output voltage from –15 V to –3 V, making it suitable for a variety of general-purpose applications.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 7 | - | 29 | V |
| Output Current | 0.1 | - | 1.5 | A |
| Output Voltage Range | -15 | - | -3 | V |
| Efficiency | - | Up to 84% | - | % |
| Operating Temperature | -40 | - | 85 | °C |
| Output Voltage Ripple | - | - | 2% VO | V(PP) |
| Current Limit Threshold | - | - | 3.2 | A |
| Package Type | - | - | Surface Mount | - |
Key Features
- High-efficiency buck-boost switching regulator with up to 84% efficiency.
- Wide input voltage range from 7 V to 29 V.
- Adjustable negative output voltage from –15 V to –3 V using a single external resistor.
- Output current limit and overtemperature shutdown for protection.
- Undervoltage lockout for reliable operation.
- Surface-mount package with improved thermal characteristics.
- Pb-free and RoHS compliant.
Applications
- General-purpose industrial controls.
- HVAC systems.
- Test and measurement equipment.
- Medical instrumentation.
- AC/DC adaptors.
- Vehicles, marine, and avionics.
Q & A
- What is the input voltage range of the PTN78000AAST?
The input voltage range is from 7 V to 29 V.
- What is the adjustable output voltage range of the PTN78000AAST?
The output voltage can be adjusted from –15 V to –3 V.
- What is the maximum output current of the PTN78000AAST?
The maximum output current is 1.5 A.
- How is the output voltage adjusted on the PTN78000AAST?
The output voltage is adjusted using a single external resistor connected between the VO Adjust pin and the GND pin.
- What are the operating temperature limits for the PTN78000AAST?
The operating temperature range is from –40°C to 85°C.
- Does the PTN78000AAST have built-in protection features?
- Is the PTN78000AAST Pb-free and RoHS compliant?
- What type of package is available for the PTN78000AAST?
The device is available in a surface-mount package.
- What are the recommended capacitor values for the PTN78000AAST?
The minimum requirements include 100 μF of non-ceramic capacitance and 9.4 μF (2 x 4.7 μF) of ceramic capacitance at the input, along with 100 μF of electrolytic capacitance.
- What are some common applications for the PTN78000AAST?
