LTC2912
4
2912fb
For more information www.linear.com/LTC2912
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.
Note 2: All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
SHUNT
V
CC
Shunt Regulator Voltage I
CC
= 5mA
I
CC
= 5mA (H‑Grade)
l
l
6.2
6.2
6.6
6.6
7.2
7.3
V
V
DV
SHUNT
V
CC
Shunt Regulator Load Regulation I
CC
= 2mA to 10mA
l
200 300 mV
V
CC
Supply Voltage (Note 3)
l
2.3 V
SHUNT
V
V
CCR(MIN)
Minimum V
CC
Output Valid DIS = 0V
l
1 V
V
CC(UVLO)
Supply Undervoltage Lockout DIS = 0V, V
CC
Rising
l
1.9 2 2.1 V
DV
CC(UVHYST)
Supply Undervoltage Lockout Hysteresis DIS = 0V
l
5 25 50 mV
I
CC
Supply Current V
CC
= 2.3V to 6V
l
29 70 µA
V
UOT
Undervoltage/Overvoltage Threshold
l
492 500 508 mV
t
UOD
Undervoltage/Overvoltage Threshold to
Output Delay
V
Hn
= V
UOT
– 5mV or V
Ln
= V
UOT
+ 5mV
l
50 125 500 µs
I
VHL
VH, VL Input Current
H
‑Grade
l
l
±15
±30
nA
nA
t
UOTO
UV/OV Time‑Out Period C
TMR
= 1nF
C
TMR
= 1nF (H‑Grade)
l
l
6
6
8.5
8.5
12.5
14
ms
ms
V
LATCH(VIH)
OV Latch Clear Input High
l
1.2 V
V
LATCH(VIL)
OV Latch Clear Input Low
l
0.8 V
I
LATCH
LATCH Input Current V
LATCH
> 0.5V
l
±1 µA
I
DIS
DIS Input Current V
DIS
> 0.5V
l
1 2 3.3 µA
V
DIS(VIH)
DIS Input High
l
1.2 V
V
DIS(VIL)
DIS Input Low
l
0.8 V
I
TMR(UP)
TMR Pull‑Up Current V
TMR
= 0V
V
TMR
= 0V (H‑Grade)
l
l
–1.3
–1.2
–2.1
–2.1
–2.8
–2.8
µA
µA
I
TMR(DOWN)
TMR Pull‑Down Current V
TMR
= 1.6V
V
TMR
= 1.6V (H‑Grade)
l
l
1.3
1.2
2.1
2.1
2.8
2.8
µA
µA
V
TMR(DIS)
Timer Disable Voltage Referenced to V
CC
l
–180 –270 mV
V
OH
Output Voltage High UV/OV/OV V
CC
= 2.3V, I
UV/OV
= –1µA
l
1 V
V
OL
Output Voltage Low UV/OV/OV V
CC
= 2.3V, I
UV/OV
= 2.5mA
V
CC
= 1V, I
UV
= 100µA
l
l
0.10
0.01
0.30
0.15
V
V
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V, VL = 0.45V, VH = 0.55V, LATCH = V
CC
unless otherwise
noted. (Note 2)
Note 3: V
CC
maximum pin voltage is limited by input current. Since the
V
CC
pin has an internal 6.5V shunt regulator, a low impedance supply that
exceeds 6V may exceed the rated terminal current. Operation from higher
voltage supplies requires a series dropping resistor. See Applications
Information.
