Overview
The LTC3779HFE#PBF is a high-performance buck-boost switching regulator controller produced by Analog Devices Inc. This controller is designed to operate from input voltages that can be above, below, or equal to the output voltage, making it highly versatile for various applications. The LTC3779 features a constant frequency current mode architecture, allowing for a phase-lockable frequency of up to 600kHz. It is particularly suited for automotive, telecom, and battery-powered systems due to its wide input and output voltage range and seamless transfers between operating regions.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| VIN Input Supply Operating Voltage Range | 4.5 | 150 | V | ||
| VOUT Output Supply Operating Voltage Range | 1.2 | 150 | V | ||
| Regulated Feedback Voltage | ITH Voltage = 1.4V | 1.188 | 1.2 | 1.212 | V |
| Transition Time: Rise Time, Fall Time | VDRVCC = 9V, CLOAD = 3300pF | 60 | ns | ||
| PGOOD Trip Level | VFB with Respect to Set Regulated Voltage | 5.5 ± 1 µA | |||
| PGOOD Delay | VPGOOD High to Low | 125 | µs |
Key Features
- Wide Input and Output Voltage Range: Operates from 4.5V to 150V input and output voltage range.
- Constant Frequency Current Mode Architecture: Allows for a phase-lockable frequency of up to 600kHz.
- Seamless Transfers: Between buck and boost operating regions.
- Precision Reference: Features a precision 1.2V reference voltage.
- Power Good Output Indicator: Provides a power good output indicator.
- Operating Modes: Selectable between pulse-skipping mode for high efficiency at light load and forced continuous mode for noise-sensitive applications.
- Synchronization Capability: Can be synchronized to an external clock via the PLLIN pin.
Applications
- Automotive Systems: Suitable for automotive applications due to its robust operating range and high reliability.
- Telecom Systems: Ideal for telecom applications requiring efficient and stable power management.
- Battery-Powered Systems: Supports battery charging with an input/output constant-current loop.
Q & A
- What is the input voltage range of the LTC3779HFE#PBF?
The input voltage range is from 4.5V to 150V.
- What is the output voltage range of the LTC3779HFE#PBF?
The output voltage range is from 1.2V to 150V.
- What is the maximum phase-lockable frequency of the LTC3779HFE#PBF?
The maximum phase-lockable frequency is up to 600kHz.
- Does the LTC3779HFE#PBF support synchronization with an external clock?
Yes, it can be synchronized to an external clock via the PLLIN pin.
- What are the operating modes available for the LTC3779HFE#PBF?
The controller can operate in pulse-skipping mode or forced continuous mode.
- What is the purpose of the power good output indicator?
The power good output indicator signals when the output voltage is within the regulated range.
- Is the LTC3779HFE#PBF suitable for battery-powered systems?
Yes, it supports battery charging with an input/output constant-current loop.
- What is the typical transition time for the LTC3779HFE#PBF?
The typical transition time (rise and fall) is 60ns with VDRVCC = 9V and CLOAD = 3300pF.
- What is the PGOOD delay for the LTC3779HFE#PBF?
The PGOOD delay from high to low is 125µs.
- What are the typical applications for the LTC3779HFE#PBF?
It is typically used in automotive, telecom, and battery-powered systems.
