Datasheet

LTC2934
3
2934f
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
V
CC
Input Supply Voltage
l
1.6 5.5 V
I
CC
V
CC
Input Supply Current
l
225 500 1000 nA
Threshold Adjustment Inputs: ADJ, PFI
V
TH
Input Threshold (Monitored Voltage Falling)
l
394 400 406 mV
V
THM
ADJ to PFI Threshold Matching
l
±2 ±8 mV
V
ADJ(HYST)
Reset Threshold Hysteresis
(Monitored Voltage Rising)
l
18 20 25 mV
V
PFI(HYST)
Power-Fail Threshold Hysteresis
(Monitored Voltage Rising)
l
81015 mV
t
UV
Undervoltage Detect to RST or PFO Falling V
ADJ
or V
PFI
= V
TH
– 4mV (Note 3) 1 ms
I
TH(LKG)
Threshold Adjustment Input Leakage Current V
ADJ
or V
PFI
= 420mV
l
0.1 ±1 nA
Control Inputs: MR, RT
V
IN(TH)
Control Input Threshold RT
MR
l
l
0.3 • V
CC
0.4
0.7 • V
CC
1.4
V
V
t
PW
Input Pulse Width MR
l
20 μs
t
PD
Propagation Delay to RST Falling Manual Reset Falling
l
2520 μs
R
PU
Internal Pull-Up Resistance MR
l
600 900 1200 kΩ
I
LK
Input Leakage Current (RT Input) RT = V
CC
or GND
l
±1 ±10 nA
Reset and Power Fail Outputs: RST, PFO
V
OL
Voltage Output Low V
CC
= 1V, 200μA Pull-Up Current
V
CC
= 3V, 3mA Pull-Up Current
l
l
25
50
100
150
mV
mV
V
OH
Voltage Output High (LTC2934-2) –200μA Pull-Down Current
l
0.7 • V
CC
V
I
OH
Leakage Current, Output High (LTC2934-1) V
RST
, V
PFO
= 3.6V
l
±1 ±10 nA
t
RST
Reset Timeout Period RT Input High
RT Input Low
l
l
140
10
200
15
260
25
ms
ms
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C, V
CC
= 3.6V, unless otherwise noted. (Note 2)
Note 2. All currents into pins are positive, all voltages are referenced to
GND unless otherwise noted.
Note 3. Guaranteed by design. Characterized, but not production tested.