LTC2914_15 Datasheet, PDF (1/18 Pages) Linear Technology – Quad UV/OV Positive/Negative Voltage Monitor

Features
n _{Monitors Four Voltages Simultaneously}
n _{Adjustable UV and OV Trip Values}
n _{Guaranteed Threshold Accuracy: ±1.5% of}
Monitored Voltage over Temperature
n _{Input Glitch Rejection}
n _{Monitors up to Two Negative Voltages}
n _{Buffered 1V Reference Output}
n _{Adjustable Reset Timeout with Timeout Disable}
n _{62µA Quiescent Current}
n _{Open-Drain OV and UV Outputs}
n _{Guaranteed OV and UV for VCC ≥ 1V}
n _{Available in 16-Lead SSOP and 16-Lead}
(5mm × 3mm) DFN Packages
Applications
n _{Desktop and Notebook Computers}
n _{Network Servers}
n _{Core, I/O Voltage Monitors}
LTC2914
Quad UV/OV
Positive/Negative
Voltage Monitor
Description
The LTC^®2914 is a quad input voltage monitor intended for
monitoring multiple voltages in a variety of applications.
Dual inputs for each monitored voltage allow monitor-
ing four separate undervoltage (UV) conditions and four
separate overvoltage (OV) conditions. All monitors share
a common undervoltage output and a common overvolt-
age output. The LTC2914-1 has latching capability for the
overvoltage output. The LTC2914-2 has functionality to
disable both the overvoltage and undervoltage outputs.
Polarity selection and a buffered reference allow monitor-
ing up to two separate negative voltages. A three-state
input pin allows setting the polarity of two inputs without
requiring any external components. Glitch filtering ensures
reliable reset operation without false or noisy triggering.
The LTC2914 provides a precise, versatile, space-con-
scious, micropower solution for voltage monitoring.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
Quad UV/OV Supply Monitor,10% Tolerance, 5V, 3.3V, 2.5V, 1.8V
5V
3.3V
P0WER
SUPPLIES
2.5V
1.8V
0.1μF
44.2k
1k
4.53k
27.4k
1k
4.53k
19.6k
1k
4.53k
V_CC
VH1
SEL
VL1
OV
VH2
LTC2914-1
SYSTEM
VL2
UV
REF
VH3 LATCH
12.4k
VL3
VH4
1k
VL4
GND
4.53k
TMR
C_TMR
2914 TA01a
22nF
TIMEOUT = 200ms
0.505
0.504
0.503
0.502
0.501
0.500
0.499
0.498
0.497
0.496
0.495
–50
Input Threshold Voltage
vs Temperature
–25 0 25 50
TEMPERATURE (°C)
75 100
2914 TA01b
For more information www.linear.com/LTC2914
2914fc
1