Quad Supply Monitor assures reset for Vcc as low as 500 mV.
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Press Release Summary:
Model LTC2903-1 provides 10% undervoltage monitoring with tight ±1.5% voltage threshold accuracy, guaranteeing reliable reset operation without false triggering. Typical supply current is 20 µA. Factory-trimmed voltage combinations include +5.0, +3.3, +2.5, +1.8, and -5.2 V. Adjustable input accepts supplies as low as 0.5 V. Monitor comes in 6-lead ThinSOT(TM) package and is suited for portable intelligent instruments, PCs, and network equipment.
Original Press Release:
Quad Supply Monitor in Tiny ThinSOT Package Assures Reset for Vcc as low as 500mV
MILPITAS, CA - November 19, 2003 - Linear Technology introduces the LTC2903-1, a quad supply monitor in a tiny 6-lead ThinSOT(TM) (SOT-23) package that assures a valid RESET##CRLF# signal for Vcc down to 500mV. Holding the RESET##CRLF# output low with as little as 500mV supply voltage compared to 1V levels of traditional supply monitors reduces the risk of triggering external logic or low voltage processors. The LTC2903-1 provides 10% undervoltage monitoring with tight ±1.5% voltage threshold accuracy that guarantees reliable reset operation without false triggering.
The LTC2903-1 has a typical supply current of 20uA, which is ideal for power conscious systems. In addition, the very small size makes it perfectly suitable for portable intelligent instruments, PCs, and network and telecom equipment.
A variety of factory-trimmed voltage combinations are available to accommodate different input supplies with minimal external component requirements. The selection includes internally fixed options for monitoring +5.0V, +3.3V, +2.5V, +1.8V, -5.2V, and an adjustable input that accepts supplies as low as 0.5V. Prices for the LTC2903-1 begin at $1.65 each in 1,000-piece quantities. The part is specified over the commercial and industrial temperature ranges.
Summary of Features: LTC2903-1
Monitors Four Inputs Simultaneously
3.3V, 2.5V, 1.8V, ADJ (LTC2903A-1)
5V, 3.3V, 2.5V, 1.8V (LTC2903B-1)
5V, 3.3V, 1.8V, -5.2V (LTC2903C-1)
Ultralow Voltage Reset: Vcc= 500mV
Guaranteed Threshold Accuracy: ±1.5% Over Temperature
10% Undervoltage Monitoring
Low Supply Current: 20uA (typ)
Power Supply Glitch Immunity
Low-Profile (1mm) ThinSOT (SOT-23) Package
Company Background
Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include operational, instrumentation and audio amplifiers; voltage regulators, power management devices, DC-DC converters and voltage references; comparators; monolithic filters; communications interface circuits; one-chip data acquisition sub-systems; pulse-width modulators and sample-and-hold devices; and high frequency devices. Applications for Linear Technology's high performance circuits include wireless and broadband telecommunications infrastructure, cellular telephones, networking products and satellite systems, notebook and desk top computers, computer peripherals, video/multimedia, industrial and medical instrumentation, automotive electronics, factory automation, process control, military and space systems, and high-end consumer products including digital cameras, MP3 players and other electronic products.
Note: LT, AND LTC are registered trademarks of Linear Technology Corp.
