1. Products
  2. Power Monitor, Control, and Protection
  3. Hot Swap Controllers
  4. Low Voltage Hot Swap Controllers
  5. LTC1421


Overview

Features and Benefits

  • Allows Safe Board Insertion and Removal from a Live Backplane
  • System Reset and Power Good Control Outputs
  • Programmable Electronic Circuit Breaker
  • User Programmable Supply Voltage Power-Up Rate
  • High Side Driver for Two External N-Channels
  • Controls Supply Voltages from 3V to 12V
  • Connection Inputs Detect Board Insertion or Removal
  • Undervoltage Lockout
  • Power-On Reset Input

Product Details

The LTC1421/LTC1421-2.5 are Hot Swap controllers that allow a board to be safely inserted and removed from a live backplane. Using external N-channel pass transistors, the board supply voltages can be ramped up at a programmable rate. Two high side switch drivers control the N-channel gates for supply voltages ranging from 3V to 12V.

A programmable electronic circuit breaker protects against shorts. Warning signals indicate that the circuit breaker has tripped, a power failure has occurred or that the switch drivers are turned off. The reset output can be used to generate a system reset when the power cycles or a fault occurs. The two connect inputs can be used with staggered connector pins to indicate board insertion or removal. The power-on reset input can be used to cycle the board power or clear the circuit breaker.

The trip point of the ground sense comparator is set at 0.1V for LTC1421 and 2.5V for LTC1421-2.5.

The LTC1421/LTC1421-2.5 are available in 24-pin SO and SSOP packages.

Applications

  • Hot Board Insertion
  • Electronic Circuit Breaker

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Product Recommendations

LTC1421 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LTC1421CG#PBF Material Declaration Reliability Data 24-Lead SSOP
LTC1421CG#TRPBF Material Declaration Reliability Data 24-Lead SSOP
LTC1421CG-2.5#PBF Material Declaration Reliability Data 24-Lead SSOP
LTC1421CG-2.5#TRPBF Material Declaration Reliability Data 24-Lead SSOP
LTC1421CSW#PBF Material Declaration Reliability Data 24-Lead SOIC (Wide 0.3 Inch)
LTC1421CSW#TRPBF Material Declaration Reliability Data 24-Lead SOIC (Wide 0.3 Inch)
LTC1421CSW-2.5#PBF Material Declaration Reliability Data 24-Lead SOIC (Wide 0.3 Inch)
LTC1421CSW-2.5#TRPBF Material Declaration Reliability Data 24-Lead SOIC (Wide 0.3 Inch)
LTC1421IG#PBF Material Declaration Reliability Data 24-Lead SSOP
LTC1421IG#TRPBF Material Declaration Reliability Data 24-Lead SSOP
LTC1421IG-2.5#PBF Material Declaration Reliability Data 24-Lead SSOP
LTC1421IG-2.5#TRPBF Material Declaration Reliability Data 24-Lead SSOP
LTC1421ISW#PBF Material Declaration Reliability Data 24-Lead SOIC (Wide 0.3 Inch)
LTC1421ISW#TRPBF Material Declaration Reliability Data 24-Lead SOIC (Wide 0.3 Inch)
LTC1421ISW-2.5#PBF Material Declaration Reliability Data 24-Lead SOIC (Wide 0.3 Inch)
LTC1421ISW-2.5#TRPBF Material Declaration Reliability Data 24-Lead SOIC (Wide 0.3 Inch)
Wafer Fabrication Data R319 Reliability Data

PCN-PDN Information

Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.

Sample & Buy


Ordering FAQs


See our Ordering FAQs for answers to questions about online orders, payment options and more.

 

Buy Now Pricing


(**) Displayed Buy Now Price and Price Range is based on small quantity orders.

 

List Pricing


(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

 

Lead Times


Please see the latest communication from our CCO regarding lead times.

 

Sampling


A Sample link will be shown above, next to the part, only for parts that are included in our sample program. Selecting the Sample button will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.


Price Table Help