LTC1422 - Hot Swap Controller
Datasheet 
DocumentationDatasheet
Design Note
- DN197 - Power Solutions for the Device Bay
- DN272 - Multiple Power Supplies Track During Power Up
- DN319 - Low Voltage Hot Swap Controller Ignores Backplane Noise and Surges
Reliability Data
Product Selector Card
LT Journal
cad_symbol
Features
- Allows Safe Board Insertion and Removal from a Live Backplane
- System Reset Output with Programmable Delay
- Programmable Electronic Circuit Breaker
- User-Programmable Supply Voltage Power-Up Rate
- High Side Driver for an External N-Channel FET
- Controls Supply Voltages from 2.7V to 12V
- Undervoltage Lockout
- Soft Reset Input
- Glitch Filter on RESET
Typical Application
Description
The LTC1422 is an 8-pin Hot Swap™ controller that allows a board to be safely inserted and removed from a live backplane. Using an external N-channel pass transistor, the board supply voltage can be ramped up at a programmable rate. A high side switch driver controls the N-channel gate for supply voltages ranging from 2.7V to 12V.A programmable electronic circuit breaker protects against shorts. The RESET output can be used to generate a system reset when the supply voltage falls below a programmable voltage. The ON pin can be used to cycle the board power or to generate a soft reset.
The LTC1422 is available in 8-pin PDIP and SO packages.
N-8,SO-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC1422CN8#PBF | PDIP | 8 | C | $2.95 | $2.50 |
| LTC1422CS8#PBF | SO | 8 | C | $3.50 | $2.75 |
| LTC1422CS8#TRPBF | SO | 8 | C | $2.81 | |
| LTC1422IN8#PBF | PDIP | 8 | I | $3.35 | $2.85 |
| LTC1422IS8#PBF | SO | 8 | I | $4.00 | $3.15 |
| LTC1422IS8#TRPBF | SO | 8 | I | $3.21 | |
| LTC1422CN8 | PDIP | 8 | C | $5.90 | $5.00 |
| LTC1422CS8 | SO | 8 | C | $7.00 | $5.50 |
| LTC1422CS8#TR | SO | 8 | C | $5.62 | |
| LTC1422IN8 | PDIP | 8 | I | $6.70 | $5.70 |
| LTC1422IS8 | SO | 8 | I | $8.00 | $6.30 |
| LTC1422IS8#TR | SO | 8 | I | $6.42 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1357A | LTC1422 2.7V to 12V 8-Pin Hot Swap Controller | Contact Factory |