MIC2790_14 Datasheet, PDF (1/18 Pages) Micrel Semiconductor – Supervisor with High-Accuracy, Ultra-Fast Propagation Delay, and Capacitor-Programmable Reset Delay

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: www.micrel.com.
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 [phone] • fax + 1 [phone] • http://www.micrel.com
May 22, 2014
Revision 1.2