LTC2924 - Quad Power Supply Sequencer _ BDTIC a Leading Distributor in China

LTC2924 - Quad Power Supply Sequencer

An internally regulated charge pump provides gate drive voltages for external logic and sub-logic-level MOSFETs. Adding a single capacitor enables an adjustable time delay between power supplies during both Power On and Power Off sequencing. A second capacitor can be added to enable a power good timer for detecting the failure of any power supply to turn on within the selected time. Errors in power supply sequencing and the control input are detected and reported at the FAULT output. The LTC2924 features precision input comparators which can provide 1% accuracy in monitoring power supply voltages.

Multiple LTC2924s may be easily cascaded to sequence a virtually unlimited number of power supplies.

Features

Fully Sequence and Monitor Four Supplies– Six with Minimal External Circuitry
Cascadable for Additional Supplies
Power Off in Reverse Order or Simultaneously
Charge Pump Drives External MOSFETs
Drives Power Supply Shutdown Pins with No External Pull-Up Resistors
10µA Output Current Allows Soft-Starting of Supplies
Done Indicator for Both Power On and Power Off
Adjustable Time Delay Between Power Supplies
Power Good Timer
Power Supply Voltage Monitoring and Power Sequence Error Detection and Reporting
Available in a 16-Lead Narrow SSOP Package

Typical Application

Applications

Sequenced Power Supplies for ASICs with Multiple I/O and Core Voltages
Latch-Up Prevention in Systems with Multiple Power Supplies

Packaging

Order Information

Part Number	Package	Temp	Price(1-99)	Price (1k)*
LTC2924CGN#PBF	SSOP-16	C	$3.50	$2.65
LTC2924CGN#TRPBF	SSOP-16	C		$2.71
LTC2924IGN#PBF	SSOP-16	I	$4.17	$3.15
LTC2924IGN#TRPBF	SSOP-16	I		$3.21

Demo Boards

Part Number	Description	Price
DC818A	LTC2924 Quad Supply Sequencer	$50.00