LTC2902-1 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
LTC2902 典型应用
参数
LTC2902 参数
LTC2902-1 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
LTC2902-1 数据手册及相关资料下载
  1. 数据手册(英文) : LTC2902 - Programmable Quad Supply Monitor with Adjustable Reset Timer and Supply Tolerance.PDF
  2. 可靠性数据 : R413 Reliability Data .PDF
  3. 产品选型卡 : High Voltage Surge Stoppers.PDF
  4. 产品选型卡 : Voltage Monitors & Supervisors Quick Guide.PDF