Datasheet

LTC2919
3
2919f
The ● denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
CC
= 2.5V (LTC2919-2.5), V
CC
= 3.3V (LTC2919-3.3), V
CC
= 5V
(LTC2919-5), ADJ1 = ADJ2 = 0.55V, SEL = fl oating, unless otherwise noted. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC(MIN)
Operating Supply Voltage RST, OUT1, OUT2 in Correct State
●
0.5 V
V
CC(SHUNT)
V
CC
Shunt Regulation Voltage I
CC
= 1mA, I
REF
= 0
●
6.0 6.5 7.1 V
I
CC
V
CC
Input Current 2.175V < V
CC
< 6V (C-Grade, I-Grade)
2.175V < V
CC
< 6V (H-Grade)
●
●
50
50
220
280
µA
µA
V
RT
ADJ Input Threshold
●
495.0
492.5
500
500
505.0
507.5
mV
mV
ΔV
RT
ADJ Hysteresis (Note 4) TMR = V
CC
1.5 3.5 10.0 mV
I
ADJ
ADJ Input Current V
ADJ
= 0.55V (C-Grade, I-Grade)
V
ADJ
= 0.55V (H-Grade)
●
●
0
0
±15
±40
nA
nA
V
CC(UVLO)
V
CC
–10% UVLO Threshold LTC2919-2.5
LTC2919-3.3
LTC2919-5
●
●
●
2.175
2.871
4.350
2.213
2.921
4.425
2.250
2.970
4.500
V
V
V
ΔV
CC(UVLO)
UVLO Hysteresis (Note 4) TMR = V
CC
0.3 0.7 2.0 %
V
REF
Buffered Reference Voltage V
CC
> 2.175V, I
REF
= ±1mA
●
0.990
0.985
1.000
1.000
1.010
1.015
V
V
I
TMR(UP)
TMR Pull-Up Current V
TMR
= 1V
●
–1.5 –2.2 –2.9 µA
I
TMR(DOWN)
TMR Pull-Down Current V
TMR
= 1V
●
1.5 2.2 2.9 µA
t
RST(EXT)
Reset Timeout Period, External C
TMR
= 2.2nF
●
15 20 27 ms
t
RST(INT)
Reset Timeout Period, Internal V
TMR
= 0V
●
140 200 280 ms
V
TMR(DIS)
Timer Disable Voltage V
TMR
Rising
●
V
CC
– 0.40
V
CC
– 0.20
V
CC
– 0.10
V
ΔV
TMR(DIS)
Timer Disable Hysteresis V
TMR
Falling
●
40 100 160 mV
V
TMR(INT)
Timer Internal Mode Voltage V
TMR
Falling
●
0.10 0.20 0.40 V
ΔV
TMR(INT)
Timer Internal Mode Hysteresis V
TMR
Rising
●
40 100 160 mV
t
PROP
ADJx Comparator Propagation Delay to
OUT
X
ADJx Driven Beyond Threshold (V
RTX
) by
5mV
●
50 150 800 µs
t
UV
V
CC
Undervoltage Detect to RST V
CC
Less Than UVLO Threshold
(V
CC(UVLO)
) by 1%
●
50 150 800 µs
V
OL
Output Voltage Low V
CC
= 0.5V, I = 5µA
V
CC
= 1V, I = 100µA
V
CC
= 3V, I = 2500µA
●
●
●
0
0
0
0.01
0.01
0.10
0.15
0.15
0.30
V
V
V
I
OH
Output Voltage High Leakage Output = V
CC
(C-Grade, I-Grade)
Output = V
CC
(H-Grade)
●
●
0
0
±1
±5
µA
µA
Three-State Input SEL
V
IL
Low Level Input Voltage
●
0 0.4 V
V
IH
High Level Input Voltage
●
1.4 V
CC
V
V
Z
Pin Voltage when Left in Open State I
SEL
= 0µA 0.8 0.9 1.0 V
ELECTRICAL CHARACTERISTICS