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Product Detailed Parameters
- Description：IC POE CNTRL 12 CHANNEL 52QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Type：Controller (PSE)
- Number of Channels：12
- Power - Max：13 W
- Internal Switch(s)：No
- Auxiliary Sense：No
- Standards：802.3at (PoE+), 802.3af (PoE), LTPoE++
- Voltage - Supply：45V ~ 57V
- Current - Supply：9mA
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：52-WFQFN Exposed Pad
- Supplier Device Package：52-QFN (7x8)
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Overview
The LTC4270CIUKG is a hot-swap controller manufactured by Analog Devices Inc., designed for safe insertion and removal of circuit boards in live backplane systems. It features an integrated N-channel MOSFET driver and current limit control within a compact 16-lead TSSOP package. The device supports programmable rise time, current limit, and overvoltage lockout thresholds via external components. It provides comprehensive protection against short circuits, overcurrent, and thermal faults during board insertion.
Feature Summary
- Integrated high-side N-channel MOSFET driver with adjustable slew rate control
- Programmable current limit and foldback protection for fault management
- Overvoltage lockout (OVL) with hysteresis to prevent operation below valid supply levels
- Thermal shutdown and power good status indication
Applications
- Hot-plug capable server backplanes
- Telecommunications equipment requiring live board insertion
- Industrial control systems with modular I/O cards
- Data acquisition systems needing safe module replacement
Procurement Notes
Verify the specific suffix 'I' indicates industrial temperature range (-40°C to +85°C). Confirm the 'UKG' package code corresponds to the 16-lead TSSOP with exposed pad. Ensure compatibility with system voltage rails before procurement. Check for RoHS compliance documentation if required by project specifications.
Selection Notes
Select this component when active hot-swap protection is required for N-channel MOSFETs. Consider the internal gate driver capability versus external drivers based on board space constraints. Evaluate the need for programmable parameters against fixed-threshold alternatives. Verify that the package size fits the PCB layout requirements.
Part Context
Part of the LTC4270 family of hot-swap controllers. Similar variants include LTC4271 and LTC4272, which may offer different pinouts or additional features like dual MOSFET support. The CIUKG designation specifies the commercial/industrial temperature grade and surface-mount packaging.
Replacement Considerations
Direct substitutes may include LTC4271IUHD#PBF or LTC4272IUHD#PBF depending on pin compatibility and feature requirements. Verify electrical characteristics and package dimensions match the original design. Consult manufacturer cross-reference tools for qualified replacements.
