ltc1142 Linear Technology Corporation, ltc1142 Datasheet - Page 3

• Manufacturer Part Number: ltc1142
• Description: Dual High Efficiency Synchronous Step-down Switching Regulators
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
V
V
V
I
I
t
t
– 40 C T
SYMBOL
V
I
V
I
V
V
SHDN
11
OFF
r
2
10
1
15
SHDN
, t
2
OUT
1
15
, I
, V
, I
, I
– V
– V
f
16
– V
– V
24
24
16
28
28
14
14
A
PARAMETER
Input DC Supply Current (Note 3)
Input DC Supply Current (Note 3)
Current Sense Threshold Voltage
Shutdown Pin Threshold
Shutdown Pin Input Current
C
Off-Time (Note 4)
Driver Output Transition Times
PARAMETER
Feedback Voltage
Feedback Current
Regulated Output Voltage
Input DC Supply Current (Note 3)
Input DC Supply Current (Note 3)
Input DC Supply Current (Note 3)
Current Sense Threshold Voltage
T
85 C (Note 5), V
Pin Discharge Current
Normal Mode
Sleep Mode
Shutdown
Normal Mode
Sleep Mode
Shutdown
3.3V Output
5V Output
Normal Mode
Sleep Mode
Shutdown
Normal Mode
Sleep Mode
Shutdown
Normal Mode
Sleep Mode
Shutdown
10
= V
24
= 10V, unless otherwise noted.
CONDITIONS
LTC1142HV, LTC1142HV-ADJ
LTC1142L-ADJ (Note 6)
LTC1142HV-ADJ, LTC1142L-ADJ
LTC1142, LTC1142HV
LTC1142, LTC1142HV
0V < V
V
V
C
C
CONDITIONS
LTC1142HV-ADJ Only: V
LTC1142HV-ADJ Only
LTC1142, LTC1142HV
LTC1142
LTC1142HV-ADJ, LTC1142HV
LTC1142L-ADJ (Note 6)
LTC1142HV-ADJ, LTC1142L-ADJ
LTC1142, LTC1142HV
OUT
OUT
T
L
= 390pF, I
= 3000pF (Pins 6, 9, 20, 23), V
4V < V
4V < V
V
3.5V < V
3.5V < V
V
V
V
V
V
V
V
I
I
4V < V
4V < V
V
4V < V
4V < V
V
3.5V < V
3.5V < V
V
V
V
V
V
LOAD
LOAD
SD1
SD1
14
14
28
28
14
14
SHDN
SHDN
SD1
14
14
28
28
in Regulation, V
= 0V
SHDN
A
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
= 25 C. V
= V
= V
= V
= 700mA, V
= 700mA, V
10
24
10
24
10
24
= 2.1V, 4V < V
= 2.1V, 4V < V
28
28
OUT
OUT
28
28
OUT
OUT
OUT
OUT
10
10
< 8V, V
10
10
, V
SD2
SD2
, V
, V
SD2
< 18V, 6V < V
< 12V, 6V < V
< 18V, 6V < V
LOAD
= V
= V
= V
= V
, V
, V
, V
, V
24
+ 100mV (Forced)
– 100mV (Forced)
24
24
The
+ 100mV (Forced)
– 100mV (Forced)
+ 100mV (Forced)
– 100mV (Forced)
= 2.1V, 4V < V
= 2.1V, 3.5V < V
= 2.1V, 3.5V < V
24
24
OUT
OUT
24
24
OUT
OUT
< 18V
< 12V
< 18V
= 700mA
< 12V
< 12V
10
< 12V
< 12V
10
+ 100mV, V
– 100mV, V
+ 100mV, V
– 100mV, V
24
10
, V
SENSE
denotes the specifications which apply over the full operating
= V
= 9V
= 9V
24
10
10
10
24
10
10
10
= 16V
, V
, V
, V
–
LTC1142/LTC1142L/LTC1142HV
= V
= 10V, V
< 18V
< 12V
< 18V
24
24
24
10
OUT
= 9V
< 12V
< 12V
10
2
2
10
2
2
, V
10
= V
= V
= V
= V
, V
, V
24
, V
24
24
16
16
16
16
< 18V
24
SHDN
< 12V
< 12V
= V
= V
= V
= V
= 6V
REF
REF
REF
REF
= 0V unless otherwise noted.
+ 25mV
– 25mV
+ 25mV
– 25mV
1.21
3.17
4.85
MIN
MIN
130
130
130
125
125
0.5
50
4
160
1.6
10
1.25
3.33
5.05
TYP
TYP
160
150
150
150
100
160
160
160
150
150
1.6
0.8
1.2
0.2
1.6
1.6
1.6
10
25
25
25
70
10
10
10
25
25
2
5
250
2.3
22
MAX
MAX
1.29
3.43
5.20
230
170
170
170
200
260
280
260
175
175
2.4
2.6
2.4
2.1
20
90
10
22
24
22
2
5
6
1
UNITS
UNITS
3
mA
mA
mV
mV
mV
mV
mV
mV
mA
mA
mA
mV
mV
mV
mV
ns
A
A
A
A
V
A
A
A
V
A
V
V
A
A
A
A
A
A
s