Datasheet

LTC2953
3
2953f
ELECTRICAL CHARACTERISTICS
The ● denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= 2.7V to 27V, unless otherwise noted (Note 2).
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
EN(LKG)
EN/
⎯
E
⎯
N Leakage Current V
EN/
⎯
E
⎯
N
= 1V, Sink Current Off
V
EN/
⎯
E
⎯
N
= 40V, Sink Current Off
●
●
±0.1
±1
μA
μA
V
EN(VOL)
EN/
⎯
E
⎯
N Voltage Output Low I
EN/
⎯
E
⎯
N
= 500μA
●
0.11 0.4 V
t
EN, Lock Out
EN/
⎯
E
⎯
N Lock Out Time (Note 3) Enable Released → Enable Asserted
●
52 64 82 ms
On/Off Timing Pins (
⎯
P
⎯
B, UVLO, PDT,
⎯
I
⎯
N
⎯
T)
t
DB, ON
Turn On Debounce Time
⎯
P
⎯
B Falling → Enable Asserted
●
26 32 41 ms
I
PDT(PU)
PDT Pull Up Current V
PDT
= 0V
●
–2.4 –3 –3.6 μA
I
PDT(PD)
PDT Pull Down Current V
PDT
= 1.3V
●
2.433.6 μA
t
DB, OFF
Turn Off Interrupt Debounce Time
⎯
P
⎯
B, UVLO Falling →
⎯
I
⎯
N
⎯
T Falling
●
26 32 41 ms
t
PD, Min
Internal
⎯
P
⎯
B Power Down Delay
Time (Note 4)
⎯
P
⎯
B, UVLO Falling → Enable Released
PDT Open
●
52 64 82 ms
t
PDT
Additional Adjustable
⎯
P
⎯
B Power
Down Delay Time
C
PDT
= 1500pF
●
9 11.5 13.5 ms
t
INT
,
Min
Minimum
⎯
I
⎯
N
⎯
T Pulse Width
⎯
I
⎯
N
⎯
T Asserted →
⎯
I
⎯
N
⎯
T Released
●
26 32 41 ms
t
INT, Max
Maximum
⎯
I
⎯
N
⎯
T Pulse Width C
PDT
= 1500pF,
⎯
I
⎯
N
⎯
T Asserted →
⎯
I
⎯
N
⎯
T Released
●
35 43.5 54.5 ms
μP Handshake Pins (
⎯
K
⎯
I
⎯
L
⎯
L,
⎯
I
⎯
N
⎯
T)
V
KILL(TH)
⎯
K
⎯
I
⎯
L
⎯
L Input Threshold Voltage
⎯
K
⎯
I
⎯
L
⎯
L Falling
●
0.57 0.6 0.63 V
V
KILL(HYST)
⎯
K
⎯
I
⎯
L
⎯
L Input Threshold Hysteresis
●
10 30 50 mV
t
KILL(PW)
⎯
K
⎯
I
⎯
L
⎯
L Minimum Pulse Width
●
30 μs
t
KILL(PD)
⎯
K
⎯
I
⎯
L
⎯
L Propagation Delay
⎯
K
⎯
I
⎯
L
⎯
L Falling → Enable Released
●
30 μs
t
KILL, ON BLANK
⎯
K
⎯
I
⎯
L
⎯
L Turn On Blanking (Note 5)
⎯
K
⎯
I
⎯
L
⎯
L = Low, Enable Asserted → Enable Released
●
400 512 650 ms
I
KILL(LKG)
⎯
K
⎯
I
⎯
L
⎯
L Leakage Current V
KILL
= 0.6V
●
±0.1 μA
I
INT(LKG)
⎯
I
⎯
N
⎯
T Leakage Current V
INT
= 3V
●
±0.1 μA
V
INT(VOL)
⎯
I
⎯
N
⎯
T Output Voltage Low I
INT
= 3mA
●
0.11 0.4 V
Power Fail and Voltage Monitor Pins (
⎯
P
⎯
F
⎯
I,
⎯
P
⎯
F
⎯
O, UVLO, VM,
⎯
R
⎯
S
⎯
T)
V
PFI(TH)
⎯
P
⎯
F
⎯
I Input Threshold Voltage Falling
●
492 500 508 mV
V
UVLO(TH)
UVLO Input Threshold Voltage Falling
●
492 500 508 mV
VM
(TH)
Adjustable Reset Threshold Falling/Rising
●
492 500 508 mV
ΔV
TH
⎯
P
⎯
F
⎯
I-UVLO Threshold Mismatch
●
–5 0 5 mV
V
PFI(HYST)
⎯
P
⎯
F
⎯
I Input Hysteresis
●
2 4 10 mV
V
UVLO(HYST)
UVLO Input Hysteresis
●
30 50 70 mV
V
PFO(VOL)
⎯
P
⎯
F
⎯
O Output Voltage Low I
PFO
= 500μA
●
0.11 0.4 V
V
RST(VOL)
⎯
R
⎯
S
⎯
T Output Voltage Low I = 3mA
●
0.11 0.4 V