Datasheet
LTC2954
3
2954fb
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 2.7V to 26.4V, unless otherwise noted. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Supply Voltage Range Steady State Operation
l
2.7 26.4 V
I
IN
V
IN
Supply Current System Power-On, V
IN
= 2.7V to 24V
l
612 μA
V
UVL
V
IN
Undervoltage Lockout V
IN
Falling
l
2.2 2.3 2.5 V
V
UVL(HYST)
V
IN
Undervoltage Lockout
Hysteresis
50 400 700 mV
Pushbutton, Enable (PB, EN/EN))
V
PB(MIN, MAX)
PB Voltage Range Single-Ended
l
–1 26.4 V
I
PB
PB Input Current 2.5V < V
PB
< 26.4V
V
PB
= 1V
V
PB
= 0.6V
l
l
l
–1
–3
–6
–9
±1
–12
–15
μA
μA
μA
V
PB(VTH)
PB Input Threshold PB Falling
l
0.6 0.8 1 V
V
PB(VOC)
PB Open Circuit Voltage I
PB
= –1μA 1 1.6 2 V
t
EN,LOCKOUT
EN/EN Lockout Time (Note 5)
Enable Released → Enable Asserted
l
200 256 325 ms
I
EN(LKG)
EN/EN Leakage Current V
EN/
EN
= 1V, Sink Current Off
V
EN/
EN
= 26.4V, Sink Current Off
l
l
±0.1
±1
μA
μA
V
EN(VOL)
EN/EN Voltage Output Low I
EN/
EN
= 500μA
l
0.11 0.4 V
Power-On Timing Pin (ONT)
I
ONT(PU)
ONT Pull-Up Current V
ONT
= 0V
l
–2.4 –3 –3.6 μA
I
ONT(PD)
ONT Pull-Down Current V
ONT
= 1.3V
l
2.4 3 3.6 μA
t
DB, ON
Internal Turn-On Debounce Time
ONT Pin Float, PB Falling → Enable Asserted
l
26 32 41 ms
t
ONT
Additional Adjustable Turn-On Time C
ONT
= 1500pF
l
9 11.5 13.5 ms
Power-Down Timing Pin (PDT)
I
PDT(PU)
PDT Pull-Up Current V
PDT
= 0V
l
–2.4 –3 –3.6 μA
I
PDT(PD)
PDT Pull-Down Current V
PDT
= 1.3V
l
2.4 3 3.6 μA
t
DB,OFF
Turn-Off Interrupt Debounce Time
PB Falling → INT Falling
l
26 32 41 ms
t
PD,MIN
Internal
PB
Power-Down Debounce
Time (Note 4)
PDT Pin Float, PB Falling → Enable Released
l
52 64 82 ms
t
PDT
Additional Adjustable PB
Power-Down Debounce Time
C
PDT
= 1500pF
l
9 11.5 13.5 ms
t
INT,MIN
Minimum INT Pulse Width INT Asserted → INT Released
l
26 32 41 ms
t
INT,MAX
Maximum INT Pulse Width C
PDT
= 1500pF, INT Asserted → INT Released
l
35 43.5 54.5 ms
μP Handshake Pins (INT, KILL)
I
INT(LKG)
INT Leakage Current V
INT
= 3V
l
±1 μA
V
INT(VOL)
INT Output Voltage Low I
INT
= 3mA
l
0.11 0.4 V
V
KILL(TH)
KILL Input Threshold Voltage KILL Falling
l
0.57 0.6 0.63 V
V
KILL(HYST)
KILL Input Threshold Hysteresis
l
10 30 50 mV
I
KILL(LKG)
KILL Leakage Current V
KILL
= 0.6V
l
±0.1 μA
t
KILL(PW)
KILL Minimum Pulse Width
l
30 μs
t
KILL(PD)
KILL Propagation Delay
KILL Falling → Enable Released
l
30 μs
t
KILL,ON BLANK
KILL Turn-On Blanking (Note 3)
KILL = Low, Enable Asserted → Enable Released
l
400 512 650 ms
ELECTRICAL CHARACTERISTICS