MIC2754 Datasheet PDF - Micrel Semiconductor
| Part Number | MIC2754 | |
| Description | Power Supply Supervisors | |
| Manufacturers | Micrel Semiconductor | |
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MIC2753/2754
MIC2753/2754
Power Supply Supervisors
Preliminary Information
Micrel
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 30µA.
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
• Low 30µA typical supply current
• No external components needed
• IttyBitty™ SOT-23-5 package
Applications
• Computer systems
• Embedded controllers
• Power supplies
• Telecommunications systems
Typical Application
VCC
Fuse
Manual
Reset
MIC2754
VIN RST
MR HV
GND
Microcontroller
VCC
GND
RST IN
SCR
Crowbar
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
June 1999
1 MIC2753/2754
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MIC2753/2754
Typical Characteristics
Supply Current
vs. Temperature
100
No Load; L, M
80 voltage codes
VIN = 6V
60
40 2V 3V 4V
5V
20
1V
-040 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Normalized Reset Threshold
vs. Temperature
1.010
1.005
1.000
0.995
0.990-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Undervoltage Delay
vs. Temperature
50
L, M voltage codes
40
30 Overdrive = 10mV
20
10 20mV
0-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Power-Down Reset Delay
vs. Temperature
10
9 L, M voltage codes
8
7
6
5
4
3
2
1
0-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Manual Reset Delay
vs. Temperature
50
L, M voltage codes
45
40
35
30
25
20-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Normalized Overvoltage
Threshold vs. Temperature
1.010
1.005
1.000
0.995
0.990-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Micrel
Power-Up Reset Timeout
vs. Temperature
300
250
200
150-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Overvoltage Delay
vs. Temperature
40
10mV
30 20mV
100mV
20
Overdrive = 200mV
10
L, M voltage codes
0-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
MR Pull-up Current
vs. Temperature
300
260
220 5.0V
180
140
100 3.3V
60 2.85V
20-40 -20 0 20 40 60 80 100
TEMPERATURE (˚C)
June 1999
5 MIC2753/2754
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for MIC2754 electronic component. |
| Information | Total 12 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ MIC2754.PDF Datasheet ] | |
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