This document introduces the features and characteristics of the LT1086 series products, including adjustable or fixed 3.3V, 3.6V, 5V, 12V output voltage, 1.5A output current, 1V input-output differential, guaranteed voltage drop at multiple current levels, 0.015% line regulation, 0.1% load regulation, 100% thermal limit functional test, >75dB ripple rejection.
The LT1086 family is a 3‑terminal low‑dropout voltage regulator offering up to 1.5 A output current (0.5 A for the LT1086H). It operates with a dropout as low as 1 V and guarantees a maximum dropout of 1.5 V at full load. The device includes built‑in short‑circuit, safe‑area, and thermal‑shutdown protection.
Typical applications include SCSI‑2 active terminators, high‑efficiency linear regulators, post‑regulation for switching supplies, constant‑current sources, battery chargers, and microprocessor power supplies. The regulator requires a minimum 10 µF output capacitor for stability, with larger values improving transient response.
| Maximum Output Current | 1.5 A (0.5 A for LT1086H) |
|---|---|
| Line Regulation | 0.015 % |
| Load Regulation | 0.1 % |
| Ripple Rejection | >75 dB |
| Minimum Output Capacitor | 10 µF |
| Maximum Input Voltage (transient) | 30 V |
The LT1086 can deliver up to 1.5 A continuously (the LT1086H version is limited to 0.5 A).
A minimum of 10 µF output capacitor is required; larger values (e.g., 150 µF aluminum or 22 µF tantalum) improve stability and transient response.
The device achieves ripple rejection greater than 75 dB, even at the maximum load current.