LTC4244 Rugged, CompactPCI Bus Hot Swap Controllers
The LTC®4244/LTC4244-1 are Hot Swap™ controllers that allow a board to be safely inserted into and removed from a CompactPCI™ bus slot. External N-channel transistors control the 5V and 3.3V supplies while on-chip switches control the ±12V supplies. The 3.3V and 5V supplies can be ramped up at an adjustable rate. Electronic circuit breakers protect all four supplies against overcurrent faults. After the power-up cycle is complete, the TIMER pin capacitor serves as auxiliary VCC allowing the LTC4244/ LTC4244-1 to function without interruption in the presence of voltage spikes on the 12VIN supply. The PWRGD output indicates when all four supplies are within tolerance. The OFF/ON pin is used to cycle board power or reset the circuit breaker. The PRECHARGE output can be used to bias the bus I/O pins during card insertion and extraction. PCI_RST# is combined on-chip with HEALTHY# in order to generate LOCAL_PCI_RST#.
产品特点 Features
- Controls –12V, 3.3V, 5V and 12V Supplies
- ±14.4V Absolute Maximum Rating for 12VIN and –12VIN Input Pins
- Insensitive to Supply Voltage Transients
- Adjustable Foldback Current Limit with Circuit Breaker
- LOCAL_PCI_RST# Logic On-Chip
- PRECHARGE Output Biases I/O Pins During Card Insertion and Extraction
- LTC4244-1 Designed for Applications without –12V
- Available in 20-Lead Narrow SSOP Package
参数
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应用
- Hot Board Insertion into CompactPCI Bus
典型应用图
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LTC4244 订购信息和价格参考Package Variations and Pricing
| 器件型号 |
封装 |
引脚 |
温度 |
价格 (以 1 ~ 99 片为批量) |
价格 (以 1000 片为批量) * |
| LTC4244CGN |
SSOP |
20 |
C |
$5.54 |
$3.90 |
| LTC4244CGN#PBF |
SSOP |
20 |
C |
$5.54 |
$3.90 |
| LTC4244CGN#TR |
SSOP |
20 |
C |
|
$4.00 |
| LTC4244CGN#TRPBF |
SSOP |
20 |
C |
|
$4.00 |
| LTC4244CGN-1 |
SSOP |
20 |
C |
$5.54 |
$3.90 |
| LTC4244CGN-1#PBF |
SSOP |
20 |
C |
$5.54 |
$3.90 |
| LTC4244CGN-1#TR |
SSOP |
20 |
C |
|
$4.00 |
| LTC4244CGN-1#TRPBF |
SSOP |
20 |
C |
|
$4.00 |
| LTC4244IGN |
SSOP |
20 |
I |
$6.25 |
$4.45 |
| LTC4244IGN#PBF |
SSOP |
20 |
I |
$6.25 |
$4.45 |
| LTC4244IGN#TR |
SSOP |
20 |
I |
|
$4.55 |
| LTC4244IGN#TRPBF |
SSOP |
20 |
I |
|
$4.55 |
| LTC4244IGN-1 |
SSOP |
20 |
I |
$6.25 |
$4.45 |
| LTC4244IGN-1#PBF |
SSOP |
20 |
I |
$6.25 |
$4.45 |
| LTC4244IGN-1#TR |
SSOP |
20 |
I |
|
$4.55 |
| LTC4244IGN-1#TRPBF |
SSOP |
20 |
I |
|
$4.55 |
LTC4244 数据手册及相关资料下载
- 数据手册(英文) : LTC4244/LTC4244-1 - Rugged, CompactPCI Bus Hot Swap Controllers.PDF
- 可靠性数据 : R536 Reliability Data .PDF
- 产品选型卡 : Low Voltage Hot Swap Controllers.PDF
