Key facts
- Brand
- Linear Technology
- Model
- LTC4253A
- Category
- Other Electronics
- Industry
- Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-04-09
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Linear Technology LTC4253/LTC4253A 48V Hot Swap Controller Manual
The LTC4253 and LTC4253A are negative‑voltage hot‑swap controllers with sequencer that enable safe board insertion and removal from a live -48 V backplane. They provide adjustable analog current limiting, fast fault current limiting, undervoltage/overvoltage protection, and three sequenced power‑good outputs.
This manual describes the device features, absolute maximum ratings, package information, detailed electrical specifications, typical performance curves, pin functions, application information, related parts, and recommended PCB layout guidelines.
All Linear Technology LTC4253A documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What does the EN2 pin do?
EN2 is a TTL‑compatible input that controls the PWRGD2 and PWRGD3 power‑good outputs; driving it low forces both outputs high, while driving it high allows sequencing of the power‑good signals.
From: Linear Technology LTC4253/LTC4253A 48V Hot Swap Controller Manual
How is the soft‑start (SS) pin used?
The SS pin ramps the inrush current during start‑up; an internal current source charges the SS capacitor, and the pin voltage limits the MOSFET drain current to control the soft‑start current.
From: Linear Technology LTC4253/LTC4253A 48V Hot Swap Controller Manual