The LT3692A is a dual-channel monolithic buck regulator that operates from inputs up to 36V and supports high output currents. It has high input voltage and high transient capability, making it suitable for harsh operating environments such as automotive environments. The regulator also provides an on-die temperature monitoring function, which facilitates application circuit design, debugging, and package thermal optimization.
The document describes the LT3692A, a dual output monolithic regulator capable of operating from input voltages up to 36V with per-channel currents up to 3.5A. It is available in two packages: a 5mm × 5mm QFN and a 38-lead plastic TSSOP, with the latter offering enhanced thermal performance.
Key features include an on-die temperature monitor that provides a voltage proportional to die temperature (250mV equals 25°C), a standalone comparator block for power good or temperature flag signals, independent adjustable current limits from 2A to 4.8A, and frequency division capabilities.
| Input Voltage Range | 6V to 32V (operating), up to 36V max |
|---|---|
| Transient Voltage Capability | 60V for 1 second |
| Switching Frequency (Channel 1) | 400kHz |
| Temperature Monitor Sensitivity | 250mV per 25°C (10mV/°C) |
| Max Die Temperature | 80°C |
| Comparator Threshold | 720mV with hysteresis |
| Current Limit Range | 2A to 4.8A |
The device can operate up to an input voltage of 36V.
The voltage at the TJ pin is directly proportional to the die temperature in Celsius, where 250mV equals 25°C.
The switch current limit on each output can be programmed from 2A to 4.8A.