LTC4245 具 I2C 兼容型监视功能的多电源热插拔控制器

The LTC4245 Hot SwapTM controller allows a board to be safely inserted and removed from a live backplane in multiple supply systems such as CompactPCI and PCI Express. Using four external N-channel pass transistors, the board supply voltages can be ramped up at an adjustable rate and in any desired sequence. An I2C interface and onboard ADC allow monitoring of board current, voltage and fault status for each supply.

The device features adjustable dI/dt controlled soft start and foldback limited inrush current. A dual-level timed circuit breaker and fast current limit protect each supply against overcurrent faults. A power good input with timeout allows a downstream supply monitor to disconnect the board supplies. The device can be conﬁgured to function without a –12V supply or with an extra 3.3V supply instead of a 5V supply.

The controller has additional features to interrupt the host when a fault has occurred, notify when output power is good, detect insertion of a load card and power-up in either the on or off state

产品特点 Features

Allows Safe Insertion into Live CompactPCITM or PCI ExpressTM Backplane
8-Bit ADC Monitors Current and Voltage
I2CTM/SMBus Interface
dI/dt Controlled Soft Start
Simultaneous or Sequenced Turn-On
±20V Absolute Maximum Rating for ±12V Supplies
No External Gate Capacitor Required
Dual-Level Circuit Breaker and Current Limit
Bus Precharge Output
Power Good Input with Timeout
Optional Latchoff or Autoretry After Faults
Alerts Host After Faults
Integrated LOCAL_PCI_RST# Logic
36-Pin SSOP and 38-Pin (5mm × 7mm) QFN Packages

应用

Live Board Insertion
CompactPCI, CompactPCI Express, CompactTCA, PCI Express Systems

典型应用图

参数

LTC4245 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) *
LTC4245CG	SSOP	36	C	$8.71	$5.95
LTC4245CG#PBF	SSOP	36	C	$8.71	$5.95
LTC4245CG#TR	SSOP	36	C		$6.05
LTC4245CG#TRPBF	SSOP	36	C		$6.05
LTC4245CUHF	QFN	38	C	$8.71	$5.95
LTC4245CUHF#PBF	QFN	38	C	$8.71	$5.95
LTC4245CUHF#TR	QFN	38	C		$6.05
LTC4245CUHF#TRPBF	QFN	38	C		$6.05
LTC4245IG	SSOP	36	I	$10.45	$7.14
LTC4245IG#PBF	SSOP	36	I	$10.45	$7.14
LTC4245IG#TR	SSOP	36	I		$7.24
LTC4245IG#TRPBF	SSOP	36	I		$7.24
LTC4245IUHF	QFN	38	I	$10.45	$7.14
LTC4245IUHF#PBF	QFN	38	I	$10.45	$7.14
LTC4245IUHF#TR	QFN	38	I		$7.24
LTC4245IUHF#TRPBF	QFN	38	I		$7.24

LTC4245 数据手册及相关资料下载

数据手册(英文) : LTC4245 - Multiple Supply Hot Swap Controller with I2C Compatible Monitoring.PDF
可靠性数据 : R536 Reliability Data .PDF
产品选型卡 : Low Voltage Hot Swap Controllers.PDF