LINEAR LTC4223 User Guide Manual
Summary
This guide introduces the LTC4223, a highly compact Hot Swap Solution designed for Advanced Mezzanine Card and MicroTCA systems. It provides robust power management by protecting 12V and 3.3V supplies against dangerous inrush current, overcurrent faults, and short circuits during board insertion or removal. Ideal for engineers building portable, modular electronics, the manual details real-time current monitoring, automatic fault recovery, and precise power sequencing for maximum system reliability.
Page 1 Text Content
DESIGN FEATURES L
Compact Hot Swap Solution Simplifies Advanced Mezzanine Card Design
by Chew Lye Huat
Introduction Advanced Mezzanine Cards (Ad- The LTC4223 offers a compact and vanced MC) are 80W add-on modules The LTC4223 offers a comprehensive Hot Swap solution for that are central to the extensibility Advanced Mezzanine Cards, providing
compact and comprehensive
of Micro TCA and Advanced TCA high inrush control, overcurrent protection
Hot Swap solution for
availability systems. Advanced TCA tar- and supply monitoring. It detects
Advanced Mezzanine Cards,
gets high capacity, high performance board insertion and extraction, allow-
applications whereas Micro TCA serves providing inrush control, ing the 12V and 3.3V auxiliary power
smaller, cost-sensitive applications overcurrent protection and supply to be delivered in a controlled with less demanding requirements. manner without damaging the connec-
supply monitoring. It also
Unlike other mezzanine modules, tor. The LTC4223 provides a current
detects board insertion and
which are bolted on, Advanced MC monitor output for the 12V supply,
extraction, thus protecting
modules can be inserted into a live allowing real-time current monitoring.
backplane improving serviceability the connector. Short-circuit faults on the 12V and
and flexibility. 3.3V output are rapidly isolated with
CARRIER AMC MODULE AMC RS Q1 CONNECTOR CONNECTOR
6mΩ Si7336ADP
PWR 12V
BULK SUPPLY R3 RG
BYPASS CAPACITOR 10Ω 47Ω
12VSENSE 12VGATE12VIN
3.3V AUXIN 12VOUT
R2 MP 3.3V
AUXOUT
BULK SUPPLY
BYPASS CAPACITOR
MP ENABLE
AUXON
PWR ENABLE
R6* R5* R4* LTC4223-1
MP GOOD
AUXPGOOD
PWR GOOD
12PGOOD
FAULT
FAULT 3.3V
INTELLIGENT PLATFORM
MANAGEMENT CONTROLLER
VREF VCC EN
CLK +IN 12IMON
DOUT LTC1197L
CS –IN
GND TIMER
3.3V GND
CT 422312 F01
PRESENCE
ENABLE
RESET
*OPTIONAL
Figure 1. Typical Advanced Mezzanine Card application for Micro TCA systems
Linear Technology Magazine • March 2008
Page Summary Contents For LINEAR LTC4223 User Guide Manual
Manual Details
| Brand | Linear |
|---|---|
| Pages | 4 |
| File Size | 382.98 KB |
| Published | June 01, 2026 |
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Frequently Asked Questions
How can I monitor the 12V power consumption?
The device allows measurement of current by reproducing a relative voltage signal at the 12IMON pin.
What protection is provided against electrical faults?
It offers active current limiting, overcurrent detection, and fast-acting circuit breakers to prevent damage during an output-short.
Is there recovery if a fault or transient occurs?
Yes, the LTC4223 features automatic retry capabilities and a latch-off cycle, allowing the system to restart after the issue is cleared.
Does the module confirm physical card attendance?
The system includes Card Presence Detect circuitry for confirmation upon board insertion.