LTC2912 Datasheet, PDF (1/12 Pages) Linear Technology – Single UV/OV Voltage Monitor

FEATURES
■ _{Monitors Single Voltage}
■ _{Adjustable UV and OV Trip Values}
■ _{Guaranteed Threshold Accuracy: ±1.5%}
■ _{Power Supply Glitch Immunity}
■ _{Adjustable Reset Timeout with Timeout Disable}
■ _{29μA Quiescent Current}
■ _{Open-Drain OV and UV Outputs}
■ _{Guaranteed OV and UV for VCC ≥ 1V}
■ _{Available in 8-Lead ThinSOT}^TM _{and (3mm × 2mm)}
DFN Packages
APPLICATIONS
■ _{Desktop and Notebook Computers}
■ _{Network Servers}
■ _{Core, I/O Voltage Monitors}
LTC2912
Single UV/OV
Voltage Monitor
DESCRIPTION
The LTC^®2912 voltage monitor is designed to detect power
supply undervoltage and overvoltage events. The VL and
VH monitor inputs include filtering to reject brief glitches,
thereby ensuring reliable reset operation without false or
noisy triggering. An adjustable timer defines the duration of
the overvoltage and undervoltage reset outputs which func-
tion independently. While the LTC2912 operates directly
from 2.3V to 6V supplies, an internal V_CC shunt regulator
coupled with low supply current demand allows operation
from higher voltages such as 12V, 24V or 48V.
Three output configurations are available: the LTC2912-
1 has a latch control for the OV output; the LTC2912-2
has an OV and UV output disable feature for margining
applications; the LTC2912-3 is identical to the LTC2912-1
but with a noninverting, OV output.
The LTC2912 provides a precise, versatile, space-conscious
micropower solution for voltage monitoring.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Single OV/UV Supply Monitor, 3.3V ±10% Tolerance
POWER ^3.3V
SUPPLY
0.1μF
27.4k
1k
4.53k
V_CC
VH
OV
LTC2912-1
VL
UV
SYSTEM
GND
LATCH
TMR
2912 TA01a
22nF _{TIMEOUT = 200ms}
Reset Time-Out Period vs Capacitance
10000
1000
100
10
1
0.1
1
10
100
1000
TMR PIN CAPACITANCE, C_TMR (nF)
2912 G08
2912fa
1