Analog Devices Inc./Maxim Integrated

The LTC2913 is a dual input voltage monitor intended for multiple voltages in a variety of applications. Dual inputs for each voltage allow monitoring two separate undervoltage (UV) conditions and two separate overvoltage (OV) conditions. All monitors share a common undervoltage output and a common overvoltage output. The LTC2913-1 has latching capability for the overvoltage output. The LTC2913- 2 has functionality to disable both the overvoltage and undervoltage outputs.Glitch filtering ensures reliable reset operation without false or noisy triggering.The LTC2913 provides a precise, versatile, space-conscious, micropower solution for voltage monitoring.ApplicationsDesktop and Notebook ComputersNetwork ServersCore, I/O Voltage Monitors

The LTC2915/LTC2916 are low voltage single-supply monitors with selectable thresholds. The parts operate from 1.5V to 5.5V and consume a quiescent current of only 30µA.Two three-state inputs select one of nine internally programmed thresholds without the need for external resistors. For the LTC2915, an additional three-state input determines the tolerance (–5%, –10%, –15%). The tolerance for the LTC2916 is fixed at –5%. Threshold accuracy is guaranteed at ±1.5% over the entire operating temperature range. Glitch filtering ensures reliable reset operation without false triggering.The reset timeout may be set to 200ms or adjusted using an external capacitor. A separate manual reset input on the LTC2916 allows a simple push button interface.Operation to 125°C makes the LTC2915 and LTC2916 suitable for automotive applications.ApplicationsHandheld DevicesCell Phone Base StationsAutomotive Control SystemsNetwork ServersOptical Networking Systems

The LTC2917-A/LTC2917-B and LTC2918-A/LTC2918-B are low voltage single-supply monitors with selectable thresholds and an adjustable watchdog timer. The parts operate from 1.5V to 5.5V and consume a quiescent current of only 30µA.Two three state inputs select one of nine internally programmed thresholds without the need for external resistors. For the LTC2917, an additional three state input determines the tolerance (–5%, –10%, –15%). The tolerance for the LTC2918 is fixed at –5%. Threshold accuracy is guaranteed at ±1.5% over the entire operating temperature range. Glitch filtering ensures reliable reset operation without false triggering.The reset timeout and the watchdog timeout may be set with no external components, or adjusted using an external capacitor. A windowed watchdog feature is available for high-reliability applications (B1 versions). A separate manual reset input on the LTC2918-A/LTC2918-B allows a simple push button interface.Operation to 125°C makes the LTC2917-A/LTC2917-B and LTC2918-A/LTC2918-B suitable for automotive ap- plications.ApplicationsHandheld DevicesCell Phone Base StationsAutomotive Control SystemsNetwork ServersOptical Networking Systems

The LTC2920 allows power supplies and power supply module output voltages to be precisely adjusted both up and down for automated PCB testing. The power supply output voltage is changed by sourcing or sinking current into the feedback node or voltage adjust pin of the power supply. This allows a system to test the correct operation of electrical components at the upper and/or lower power supply voltage limits specified for a given design (Power Supply "Margining").The LTC2920 uses a single resistor to set the voltage margining current. The margining current is adjustable over a 400:1 range. Precision margin currents can be supplied to within 0.6V of ground or VCC.The LTC2920-1 is a single margining controller. The LTC2920-2 has two independently controllable margining channels. Each channel has its own control pin and current setting resistor. The LTC2920-2 can be used to symmetrically margin two power supplies, or asymmetrically margin a single power supply.Both the LTC2920-1 and LTC2920-2 feature a trimmed onboard voltage reference. Typical power supply margining accuracy is better than 0.4%.ApplicationsAutomated PCB Production TestingAutomated Preventative Maintenance TestingDC/DC Converter Module Margining