LTC1174
LTC1174-3.3/LTC1174-5
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
Output Voltage Load Regulation
The
●
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 9V, V
SHUTDOWN
= V
IN
, I
PGM
= 0V, unless otherwise noted.
CONDITIONS
LTC1174-3.3 (Note 3)
20mA < I
LOAD
< 175mA, I
PGM
= 0V
20mA < I
LOAD
< 400mA, I
PGM
= V
IN
LTC1174-5 (Note 3)
20mA < I
LOAD
< 175mA, I
PGM
= 0V
20mA < I
LOAD
< 400mA, I
PGM
= V
IN
Active Mode
LTC1174: 4V < V
IN
< 12V, I
PGM
= 0V
LTC1174HV: 4V < V
IN
< 16V, I
PGM
= 0V
Sleep Mode
LTC1174: 4V < V
IN
< 12V
LTC1174HV: 4V < V
IN
< 16V
SHUTDOWN (Note 4)
LTC1174: V
SHUTDOWN
= 0V, 4V < V
IN
< 12V
LTC1174HV: V
SHUTDOWN
= 0V, 4V < V
IN
< 16V
MIN
TYP
–5
–45
–5
–50
450
450
130
130
1
2
1.25
1.0
0.6
7.5
0.54
0.27
1.2
0.8
15
0.60
0.34
0.75
0.90
4
MAX
–70
–70
–70
–70
600
600
180
180
10
25
1.4
0.5
1.5
1.5
30
0.83
0.53
1.30
1.55
5
0.75
0.5
2.0
0.5
UNITS
mV
mV
mV
mV
µA
µA
µA
µA
µA
µA
V
µA
mA
mA
mV
A
A
Ω
Ω
µs
V
V
µA
µA
µA
I
Q
Input DC Supply Current (Note 4)
V
LBTRIP
I
LBIN
I
LBOUT
V
HYST
I
PEAK
R
ON
t
OFF
V
IH
V
IL
I
IH
I
IL
Low-Battery Trip Point
Current into Pin 3
Current Sunk by Pin 2
Comparator Hysteresis
Current Limit
ON Resistance of Switch
Switch Off-Time (Note 6)
SHUTDOWN Pin High
SHUTDOWN Pin Low
SHUTDOWN Pin Input Current
SHUTDOWN Pin Input Current
LTC1174: V
LBOUT
= 0.4V
LTC1174HV: V
LBOUT
= 0.4V
LTC1174/LTC1174HV
I
PGM
= V
IN
, V
OUT
= 0V
I
PGM
= 0V, V
OUT
= 0V
LTC1174
LTC1174HV
V
OUT
at Regulated Value
Minimum Voltage at Pin 8 for Device to Be Active
Maximum Voltage at Pin 8 for Device to Be in Shutdown
LTC1174: V
SHUTDOWN
= 12V
LTC1174HV: V
SHUTDOWN
= 16V
0
≤
V
SHUTDOWN
≤
0.8V
●
●
●
●
3
1.2
The
●
denotes specifications which apply over the full operating temperature range,
otherwise specifications are at – 40°C
≤
T
A
≤
85°C. LTC1174I and LTC1174HVI Only.
SYMBOL PARAMETER
V
FB
Feedback Voltage
I
LBOUT
Current Sunk by Pin 2
I
PEAK
Current Limit
CONDITIONS
LTC1174I/LTC1174HVI
V
LBOUT
= 0.4V (LTC1174I)
V
LBOUT
= 0.4V (LTC1174HVI)
I
PGM
= V
IN
, V
OUT
= 0V (LTC1174I)
I
PGM
= 0V, V
OUT
= 0V (LTC1174I)
I
PGM
= V
IN
, V
OUT
= 0V (LTC1174HVI)
I
PGM
= 0V, V
OUT
= 0V (LTC1174HVI)
V
OUT
at Regulated Value (LTC1174I)
V
OUT
at Regulated Value (LTC1174HVI)
LTC1174I/LTC1174HVI
●
●
●
●
●
●
●
●
MIN
1.18
0.75
0.50
0.54
0.5
2.0
1.8
t
OFF
R
ON
Switch Off-Time (Note 6)
Switch On Resistance
TYP
1.25
1.2
0.8
0.60
0.34
0.60
0.34
4
4
0.9
MAX
1.31
2.0
1.6
0.84
0.86
6.0
6.2
1.7
UNITS
V
mA
mA
A
A
A
A
µs
µs
Ω
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:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formulas:
LTC1174CN8, LTC1174CN8-3.3, LTC1174CN8-5:
T
J
= T
A
+ (P
D
×
110°C/W)
LTC1174CS8, LTC1174CS8-3.3, LTC1174CS8-5:
T
J
= T
A
+ (P
D
×
150°C/W)
1174fe
3
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
