Overview
The LTC7801IFE#TRPBF, produced by Analog Devices Inc., is a high-performance step-down switching regulator DC/DC controller. It drives an all N-channel synchronous power MOSFET stage, capable of operating from input voltages up to 140V, with an absolute maximum rating of 150V. This controller features a constant frequency current mode architecture with a phase-lockable frequency of up to 850kHz. It is designed for high efficiency and reliability, making it suitable for various high-voltage applications.
Key Specifications
| Parameter | Value |
|---|---|
| Input Supply Voltage | 0.3V to 150V |
| Output Voltage Range | 0.8V to 60V |
| Gate Drive Voltage | 5V to 10V |
| Operating Frequency | Up to 850kHz |
| No-Load Quiescent Current | 40μA |
| Operating Junction Temperature Range | -40°C to 125°C (LTC7801I), -40°C to 150°C (LTC7801H) |
| Package Type | 24-Lead Plastic TSSOP or 24-Lead (4mm x 5mm) Plastic QFN |
Key Features
- Wide input voltage range: 4V to 140V (150V absolute maximum)
- Adjustable gate drive level: 5V to 10V (OPTI-DRIVE)
- Low operating quiescent current: 40μA
- OPTI-LOOP compensation for optimized transient response
- Power good output indicator and overvoltage protection
- Integrated switch in the top gate driver eliminates the need for an external bootstrap diode
- Internal charge pump allows for 100% duty cycle operation
- Foldback current limiting for overcurrent and short-circuit protection
Applications
- Automotive and industrial power systems
- High voltage battery-operated systems
- Telecommunications power systems
Q & A
- What is the input voltage range of the LTC7801IFE#TRPBF? The input voltage range is from 4V to 140V, with an absolute maximum rating of 150V.
- What is the output voltage range of the LTC7801IFE#TRPBF? The output voltage can be programmed between 0.8V to 60V using external resistors.
- What is the operating frequency of the LTC7801IFE#TRPBF? The operating frequency can be up to 850kHz.
- What is the no-load quiescent current of the LTC7801IFE#TRPBF? The no-load quiescent current is 40μA.
- What are the key features of the OPTI-LOOP compensation in the LTC7801IFE#TRPBF? OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values.
- How does the LTC7801IFE#TRPBF protect against overvoltage conditions? The LTC7801IFE#TRPBF features an overvoltage comparator that guards against transient overshoots and other overvoltage conditions.
- What is the purpose of the power good output indicator in the LTC7801IFE#TRPBF? The power good output indicator monitors the output voltage and indicates when it is within ±10% of the 0.8V reference voltage.
- How does the foldback current limiting work in the LTC7801IFE#TRPBF? Foldback current limiting progressively lowers the peak current limit in proportion to the severity of the overcurrent or short-circuit condition.
- What are the typical applications of the LTC7801IFE#TRPBF? Typical applications include automotive and industrial power systems, high voltage battery-operated systems, and telecommunications power systems.
- What are the available package types for the LTC7801IFE#TRPBF? The available package types are 24-Lead Plastic TSSOP and 24-Lead (4mm x 5mm) Plastic QFN.
