LTC2902 Programmable Quad Supply Monitor with Adjustable Reset Timer and Supply Tolerance

The LTC®2902 is a programmable supply monitor for systems with up to four supply voltages. One of 16 preset or adjustable voltage monitor combinations can be selected using an external resistor divider connected to the program pin. The preset voltage thresholds are digitally programmable to 5%, 7.5%, 10% or 12.5% below the nominal operating voltage, and are accurate to 1.5% over temperature. All four voltage comparator outputs are connected to separate pins for individual supply monitoring.

The reset delay time is adjustable using an external capacitor. Tight voltage threshold accuracy and glitch immunity ensure reliable reset operation without false triggering. The RST output is guaranteed to be in the correct state for VCC down to 1V and may be disabled during supply margin testing. The LTC2902-1 features an open-drain RST output, while the LTC2902-2 has a push-pull RST output.

The 43µA supply current makes the LTC2902 ideal for power conscious systems and the part may be configured to monitor less than four inputs. The LTC2902-1/LTC2902-2 are available in the 16-lead narrow SSOP package

产品特点 Features

Simultaneously Monitors Four Supplies
16 User Selectable Combinations of 5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V and/or ±Adjustable Voltage Thresholds
Guaranteed Threshold Accuracy: ±1.5% of Monitored Voltage Over Temperature
Selectable Supply Tolerance: 5%, 7.5%, 10%, 12.5% Below Monitored Voltage
Low Supply Current: 43µA Typ
Adjustable Reset Time
RESET Disable Pin for Margining Applications
Open-Drain RST Output (LTC2902-1)
Push-Pull RST Output (LTC2902-2)
Individual Nondelayed Monitor Outputs for Each Supply
Power Supply Glitch Immunity
Guaranteed RESET for VCC >/= 1V

应用

Desktop and Notebook Computers
Multivoltage Systems
Telecom Equipment
Portable Battery-Powered Equipment
Network Servers

典型应用图

参数

LTC2902 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) *
LTC2902-1CGN	SSOP	16	C	$3.30	$2.35
LTC2902-1CGN#PBF	SSOP	16	C	$3.30	$2.35
LTC2902-1CGN#TR	SSOP	16	C		$2.41
LTC2902-1CGN#TRPBF	SSOP	16	C		$2.41
LTC2902-1IGN	SSOP	16	I	$3.84	$2.70
LTC2902-1IGN#PBF	SSOP	16	I	$3.84	$2.70
LTC2902-1IGN#TR	SSOP	16	I		$2.76
LTC2902-1IGN#TRPBF	SSOP	16	I		$2.76
LTC2902-2CGN	SSOP	16	C	$3.30	$2.35
LTC2902-2CGN#PBF	SSOP	16	C	$3.30	$2.35
LTC2902-2CGN#TR	SSOP	16	C		$2.41
LTC2902-2CGN#TRPBF	SSOP	16	C		$2.41
LTC2902-2IGN	SSOP	16	I	$3.84	$2.70
LTC2902-2IGN#PBF	SSOP	16	I	$3.84	$2.70
LTC2902-2IGN#TR	SSOP	16	I		$2.76
LTC2902-2IGN#TRPBF	SSOP	16	I		$2.76

LTC2902 数据手册及相关资料下载

数据手册(英文) : LTC2902 - Programmable Quad Supply Monitor with Adjustable Reset Timer and Supply Tolerance.PDF
可靠性数据 : R413 Reliability Data .PDF
产品选型卡 : High Voltage Surge Stoppers.PDF
产品选型卡 : Voltage Monitors & Supervisors Quick Guide.PDF