LTC1470 Single and Dual PCMCIA Protected 3.3V/5V VCC Switches

The LTC®1470 switches the VCC pins of a Personal Computer Memory Card International Association (PCMCIA) card slot between three operating states: OFF, 3.3V and 5V. Two low RDS(ON) N-channel power MOSFETs are driven by a built-in charge pump which generates a voltage higher than the supply voltage to fully enhance each switch when selected by the input control logic.

The LTC1470 inputs are compatible with industry standard PCMCIA controllers. A built-in XOR ensures that both switches are never on at the same time. This function also makes the LTC1470 compatible with both active-low and active-high controllers (see Applications Information section). The switch rise times are controlled to eliminate power supply glitching.

The LTC1470 features built-in SafeSlotTM current limit and thermal shutdown. The output is limited to 1A during short circuit to ground but 2A of peak operating current is allowed.

The LTC1471 is a dual version of the LTC1470 and is available in a 16-pin SO package

产品特点 Features

Single 3.3V/5V Switch in 8-Pin SO Package
Dual 3.3V/5V Switch in 16-Pin SO Package
Built-In Current Limit and Thermal Shutdown
Built-In Charge Pumps (No 12V Required)
Extremely Low RDS(ON) MOSFET Switches
Output Current Capability: 1A
Inrush Current Limited (Drives 150µF Loads)
Quiescent Current in Standby: 1µA
No Parasitic Body Diodes
Built-In XOR Function Eliminates “Glue” Logic
Break-Before-Make Switching
Controlled Rise and Fall Times

参数

应用

Notebook Computers
Palmtop Computers
Pen-Based Computers
Handi-Terminals
PC Card Reader/Writers
3.3V/5V Power Supply Switch

典型应用图

LTC1470 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) *
LTC1470CS8	SO	8	C	$3.00	$2.45
LTC1470CS8#PBF	SO	8	C	$3.00	$2.45
LTC1470CS8#TR	SO	8	C		$2.51
LTC1470CS8#TRPBF	SO	8	C		$2.51
LTC1470ES8	SO	8	E	$3.84	$2.70
LTC1470ES8#PBF	SO	8	E	$3.84	$2.70
LTC1470ES8#TR	SO	8	E		$2.76
LTC1470ES8#TRPBF	SO	8	E		$2.76

LTC1470 数据手册及相关资料下载

数据手册(英文) : LTC1470/LTC1471 - Single and Dual PCMCIA Protected 3.3V/5V VCC Switches.PDF
应用指南 (英文) : AN60 - PCMCIA Card and Card Socket Power Management.PDF
可靠性数据 : R319 Reliability Data .PDF