LTC2934
TYPICAL PERFORMANCE CHARACTERISTICS ꢄA = 25°C, unless otherwise noted1
Supplꢃ Current vs Rꢄ
Input Voltage
Supplꢃ Current vs MR Input Voltage
250
200
150
100
50
5
4
3
2
1
0
V
CC
= 3.6V
V
CC
= 3.6V
0
1
1.5
2
2.5
3
4
0
0.5
3.5
1
1.5
2
2.5
3
4
0
0.5
3.5
RT INPUT VOLTAGE (V)
MR INPUT VOLTAGE (V)
2934 G07
2934 G08
PIN FUNCTIONS
ADJ: Reset Threshold Adjustment Input. Tie to resistive
divider between monitored voltage and GND to configure
desired reset threshold. See the Applications Information
PFO: Power-Fail Output. PFO pulls low when monitored
voltage falls below the power-fail (PFI) threshold. PFO
is released when the PFI voltage rises above the power-
fail threshold by 2.5%. PFO is available with open-drain
(LTC2934-1)oractivepull-up(LTC2934-2)outputs. Leave
open if unused.
section for details. Tie to V if unused.
CC
EꢂposedPadꢁDFNOnlꢃx:ExposedPadmaybeleftfloating
or connected to device ground.
RST: Reset Output. RST pulls low when monitored volt-
age falls below the reset threshold. RST is released after
monitored voltage exceeds the reset threshold plus 5%
hysteresisandafterresettimerhasexpired.RSTisavailable
withopen-drain(LTC2934-1)oractivepull-up(LTC2934-2)
outputs. Leave open if unused.
GND: Device Ground.
MR: Manual Reset Input. Attach a push-button switch
between this input and ground. A logic low on this input
pulls RST low. When the MR input returns to logic high,
RST returns high after the reset timer has expired. Tie to
V
if unused.
CC
Rꢄ: Reset Timeout Selection Input. Tie to GND or V for
CC
PFI: Power-Fail Threshold Adjustment Input. Tie to
resistive divider between monitored voltage and GND
to configure desired power-fail threshold. See the
Applications Information section for details. Tie to V or
GND if unused.
desired reset timeout. Tie low for 15ms delay or high for
200ms delay.
V : Power Supply Input. Bypass V with 0.1μF to
CC
CC
CC
GND.
2934f
5
Linear [ Linear ]
