Overview
The LTC3862EFE-1#PBF is a two-phase constant frequency, current mode boost and SEPIC controller produced by Analog Devices Inc. This controller is designed to drive N-channel power MOSFETs and is particularly useful in applications requiring high efficiency and reliability. The two-phase operation reduces output ripple and improves thermal distribution, making it suitable for a variety of power management scenarios.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Supply Voltage (VIN) | –0.3 to 40 | V |
| INTVCC Voltage | –0.3 to 11 | V |
| INTVCC LDO RMS Output Current | 50 | mA |
| RUN Voltage | –0.3 to 8 | V |
| SYNC Voltage | –0.3 to 6 | V |
| SENSE1+, SENSE1–, SENSE2+, SENSE2– Voltage | –0.3 to V3V8 | V |
| Error Amplifier Output Sink Current | 30 | µA |
| Error Amplifier Input Bias Currents | –50 to –200 | nA |
| ITH Pin Voltage Rising | 0.275 to 25 | mV |
| Maximum Current Sense Input Threshold | 65 to 90 | mV |
| Maximum Current Sense Threshold Matching | –10 to 10 | mV |
| Temperature Range | –40 to 85 | °C |
Key Features
- Two-phase constant frequency operation to reduce output ripple and improve thermal distribution.
- Current mode boost and SEPIC controller for high efficiency.
- Drives N-channel power MOSFETs with a 10V gate drive referenced to PGND.
- Internal 10V low dropout regulator (LDO) for INTVCC.
- Error amplifier output for loop compensation and current comparator trip threshold control.
- Pulse skip mode operation for improved efficiency at light loads.
- Soft-start and RUN channel enable for controlled startup.
Applications
- High-efficiency power supplies in industrial and automotive systems.
- Boost and SEPIC converters for various power management needs.
- Systems requiring low output ripple and good thermal distribution.
- Applications where high reliability and robustness are critical.
Q & A
- What is the primary function of the LTC3862EFE-1#PBF?
The primary function is to act as a two-phase constant frequency, current mode boost and SEPIC controller. - What type of MOSFETs does the LTC3862EFE-1#PBF drive?
The controller drives N-channel power MOSFETs. - What is the input supply voltage range for the LTC3862EFE-1#PBF?
The input supply voltage range is from –0.3V to 40V. - What is the purpose of the internal 10V LDO?
The internal 10V LDO provides the INTVCC voltage and should be bypassed with a low ESR ceramic capacitor. - What is the temperature range for the LTC3862EFE-1#PBF?
The temperature range is from –40°C to 85°C. - Does the LTC3862EFE-1#PBF support pulse skip mode operation?
Yes, it supports pulse skip mode operation for improved efficiency at light loads. - How does the two-phase operation benefit the system?
The two-phase operation reduces output ripple and improves thermal distribution. - What is the maximum current sense input threshold?
The maximum current sense input threshold is between 65mV and 90mV. - What is the error amplifier output sink current?
The error amplifier output sink current is 30µA. - Can the LTC3862EFE-1#PBF be used in automotive systems?
Yes, it can be used in automotive and industrial systems due to its high efficiency and reliability.
