LTC4212 Hot Swap Controller with Power-Up Timeout

The LTC®4212 is a Hot Swap™ controller that allows a board to be safely inserted and removed from a live backplane. An internal high side switch driver controls the gate of an external N-channel MOSFET for supply voltages ranging from 2.5V to 16.5V. The LTC4212 provides soft-start and inrush current limiting during the start-up period. It features a power-up timeout circuit that disconnects the system supply when the onboard supplies do not enter into regulation within an adjustable timeout period. The controller interfaces with external supply monitor ICs or directly with the PGOOD pin of a DC/DC converter. After normal power-up, a programmable power good glitch filter can be enabled to filter out short term dips in the supplies.

Two current limit comparators provide dual level overcurrent circuit breaker protection. The slow comparator trips at VCC – 50mV and activates in 18µs. The fast comparator trips at VCC – 150mV and typically responds in 500ns.

The LTC4212 can be configured for both latchoff and autoretry applications and is available in a 10-pin MSOP package

产品特点 Features

Allows Safe Board Insertion and Removal from a Live Backplane
Controls Supply Voltages from 2.5V to 16.5V
Adjustable Soft-Start with Inrush Current Limiting
Fast Turn-Off Time
No External Gate Capacitor is Required
Power Good Input with Adjustable Timer and Glitch Filter
Power-Up Timeout Circuit Interfaces with External Supply Monitors
Dual Level Overcurrent Fault Protection
Automatic Retry or Latched Mode Operation
High Side Drive for an External N-Channel FET
MS10 Package

应用

Electronic Circuit Breaker
Hot Board Insertion and Removal
Self-Isolating Hot Swap Boards

典型应用图

参数

LTC4212 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) *
LTC4212CMS	MSOP	10	C	$3.05	$2.55
LTC4212CMS#PBF	MSOP	10	C	$3.05	$2.55
LTC4212CMS#TR	MSOP	10	C		$2.61
LTC4212CMS#TRPBF	MSOP	10	C		$2.61
LTC4212IMS	MSOP	10	I	$3.50	$2.95
LTC4212IMS#PBF	MSOP	10	I	$3.50	$2.95
LTC4212IMS#TR	MSOP	10	I		$3.01
LTC4212IMS#TRPBF	MSOP	10	I		$3.01

LTC4212 数据手册及相关资料下载

数据手册(英文) : LTC4212 - Hot Swap Controller with Power-Up Timeout.PDF
设计要点 (英文) : DN346 - PCI Express Power and Mini Card Solutions.PDF
可靠性数据 : R427 Reliability Data .PDF
产品选型卡 : Low Voltage Hot Swap Controllers.PDF