The document introduces the features and characteristics of the LTC4244/LTC4244-1 product. The product can control -12V, 3.3V, 5V and 12V power supplies, with a ±14.4V absolute maximum rating, 12VIN and -12VIN input pins have transient voltage tolerance, adjustable foldback current limiting with circuit breaker, local PCI_RST# logic and PRECHARGE output for biasing I/O pins, LTC4244-1 designed for applications without -12V and with 20-lead narrow SSOP package.
This handbook describes the LTC4244 and LTC4244‑1 hot‑swap controllers, which manage -12 V, 3.3 V, 5 V and 12 V supplies for CompactPCI bus slots. It outlines features such as adjustable foldback current limit, precharge output, and local PCI reset logic, and explains how the devices protect supplies during board insertion and removal.
The document includes detailed electrical characteristics, pin function descriptions, typical performance curves, package dimensions, and example application circuits. It also lists related parts and ordering information for the 20‑lead narrow SSOP package.
| Supply Current OFF/ON | 4 – 10 mA |
|---|---|
| Undervoltage Lockout (12Viy) | 8 – 9 V |
| 5V Output Sense Threshold | 4.61 V |
| Maximum Operating Temperature (Thermal Shutdown) | 150 °C |
| Package | 20‑Lead Plastic SSOP (Narrow .150 Inch) |
It controls -12 V, 3.3 V, 5 V and 12 V supplies.