MIC2753/2754
Micrel
MIC2753/2754
Power Supply Supervisors
Preliminary Information
General Description
The MIC2753 and MIC2754 are ultraminiature, full-featured,
power supply supervisors featuring active-high and active-
low reset outputs, respectively.
The MIC2753/4 includes an undervoltage detector with a
power-on reset generator and reset output, an overvoltage
detector with a separate output for activating crowbar circuits,
and a debounced manual reset input. Typical supply current
is a low 30碌A.
These devices provide a 140ms minimum reset output at
power-on and assert their reset outputs any time the input
voltage deviates beyond preset overvoltage or undervoltage
thresholds. Reset outputs remain asserted for 140ms (mini-
mum) after the input returns to normal or after releasing the
manual reset. When an overvoltage condition is detected, the
overvoltage output is immediately activated. Hysteresis on
both thresholds prevents erratic operation due to noise.
Features
Undervoltage and overvoltage monitor
Separate overvoltage flag output
Generates 140ms (minimum) power-on reset pulse
Debounced manual reset input
Choice of active-high (MIC2753) or
active-low (MIC2754) reset outputs
鈥?Low 30碌A typical supply current
鈥?No external components needed
鈥?IttyBitty鈩?SOT-23-5 package
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Applications
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Computer systems
Embedded controllers
Power supplies
Telecommunications systems
Typical Application
V
CC
Fuse
MIC2754
Manual
Reset
VIN
MR
GND
RST
HV
Microcontroller
VCC
GND
RST IN
SCR
Crowbar
Micrel, Inc. 鈥?1849 Fortune Drive 鈥?San Jose, CA 95131 鈥?USA 鈥?tel + 1 (408) 944-0800 鈥?fax + 1 (408) 944-0970 鈥?http://www.micrel.com
June 1999
1
MIC2753/2754
MIC2753 PDF文件相关型号
MIC2753-LBM5,MIC2753-SBM5,MIC2754-LBM5
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