MIC2790/1/3
Supervisor with High-Accuracy,
Ultra-Fast Propagation Delay, and
Capacitor-Programmable Reset Delay
General Description
The MIC2790/1/3 is ideal for monitoring highly-accurate
core voltages that require rapid response in the event of a
fault condition. The voltage supervisor IC features a
manual reset input, enable input (MIC2793 only), a
capacitor-programmable reset timeout delay and both an
active-low and active-high reset output.
The MIC2790/1/3 monitors system voltages that are in the
range of 0.4V to 5.5V, with a typical sense accuracy of
0.5% at +25°C and ±1.0% across
−40°C
to +125°C. The
IC asserts a reset output when the sense voltage drops
below the threshold or when the manual reset is pulled to
a logic low. The active-low reset stays low for the duration
of the reset timeout delay once the sense voltage returns
to normal and the manual reset transitions to a logic high
state. The reset timeout delay period is programmable
from 1ms to 10s with an external capacitor.
The MIC2790/1/3 operates from a low supply voltage of
1.5V to 5.5V, and is rated to operate over the temperature
range of
−40˚C
to +125˚C. The MIC2790 is available in a
6-pin TSOT-23 package or a 6-pin 2mm × 2mm × 0.55mm
DFN package. The MIC2791 is available in a tiny 6-pin
1.6mm × 1.6mm × 0.55mm DFN package. The MIC2793 is
available in a 8-pin 2mm × 2mm × 0.55mm DFN package.
Datasheets and support documentation are available on
Micrel’s web site at:
Features
•
1.5V to 5.5V operating supply voltage range
•
Ultra-fast propagation delay (1µs typically)
•
0.4V reference voltage (SNS pin)
−
±1.0% threshold accuracy from
−40°C
to +125°C
−
Monitored voltage range from 0.4V to 5.5V
•
Programmable reset timeout delay (from 1ms to 10s)
•
Manual reset input with an internal pull-up resistor
•
Active-high enable input pin (MIC2793 only)
•
The MIC2790/1/3 features multiple output options:
−
Open-drain active-low (/RESET)
−
Push-pull active-low (/RESET)
−
Push-pull active-high (RESET)
• −40°C
to 125°C junction temperature range
•
6-pin TSOT-23 (MIC2790)
•
6-pin 2mm × 2mm Thin DFN (MIC2790)
•
6-pin 1.6mm × 1.6mm Thin DFN (MIC2791)
•
8-pin 2mm × 2mm Thin DFN (MIC2793)
Applications
•
•
•
•
•
•
Telecom
Computer/servers
Medical equipment
Portable
Set-top boxes
Critical microprocessor monitoring
Typical Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
August 23, 2013
Revision 1.0
MICREL [ MICREL SEMICONDUCTOR ]
