LTC2913 Linear Technology, LTC2913 Datasheet - Page 6

• Manufacturer Part Number: LTC2913
• Description: Dual UV/OV Voltage Monitor
• Manufacturer: Linear Technology

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LTC2913
TMR (Pin 9): Reset Delay Timer. Attach an external capaci-
tor (C
of 9ms/nF. A 1nF capacitor will generate an 8.5ms reset
delay time. Tie TMR to V
UV (Pin 7): Undervoltage Logic Output. Asserts low when
either VH input voltage is below threshold. Held low for a
programmed delay time after both VH inputs are valid. UV
has a weak pull-up to V
using an external pull-up. Leave UV open if unused.
V
a 0.1µF (or greater) capacitor. Operates as a direct supply
PIN FUNCTIONS
6
BLOCK DIAGRAM
CC
(Pin 10): Supply Voltage. Bypass this pin to GND with
TMR
) of at least 10pF to GND to set a reset delay time
5
1
2
3
4
V
V
V
V
GND
H1
L1
H2
L2
0.5V
–
+
–
+
–
+
–
+
CC
CC
and may be pulled above V
to bypass timer.
UVLO
UVLO
10
V
CC
+
–
2V
V
CC
CC
LTC2913-1
LTC2913-2
input for voltages up to 6V. Operates as a shunt regulator for
supply voltages greater than 6V and must have a resistance
between the pin and the supply to limit input current to no
greater than 10mA. When used without a current-limiting
resistance, V
VH1/VH2 (Pin 1/Pin 3): Voltage High Inputs 1 and 2. When
the voltage on this pin is below 0.5V, an undervoltage
condition is triggered. Tie pin to V
VL1/VL2 (Pin 2/Pin 4): Voltage Low Inputs 1 and 2. When
the voltage on this pin is above 0.5V, an overvoltage condi-
tion is triggered. Tie pin to GND if unused.
DISABLE
DISABLE
CLEAR/BYPASS
OSCILLATOR
GENERATOR
GENERATOR
CC
UV PULSE
OV PULSE
OV LATCH
voltage must not exceed 6V.
9
TMR
+
–
–
+
1V
1V
V
V
CC
CC
400k
400k
CC
2µA
LATCH
if unused.
DIS
UV
OV
2913 BD
7
6
8
8
2913fa