LTC1142-ADJ Linear Technology, LTC1142-ADJ Datasheet - Page 3

• Manufacturer Part Number: LTC1142-ADJ
• Description: Dual High Efficiency Synchronous Step-Down Switching Regulators
• Manufacturer: Linear Technology

– 40 C T
ELECTRICAL C
SYMBOL
V
V
V
I
I
t
t
V
I
V
I
V
V
V
t
SHUTDOWN
11
OFF
r
2
10
OFF
1
15
SHUTDOWN
, t
2
OUT
1
15
SHUTDOWN
, I
, V
, I
– V
, I
– V
f
16
– V
– V
24
24
16
28
28
14
14
A
PARAMETER
Input DC Supply Current (Note 2)
Current Sense Threshold Voltage
Shutdown Pin Threshold
Shutdown Pin Input Current
C
Off-Time (Note 3)
Driver Output Transition Times
Feedback Voltage
Feedback Current
Regulated Output Voltage
Input DC Supply Current (Note 2)
Input DC Supply Current (Note 2)
Input DC Supply Current (Note 2)
Current Sense Threshold Voltage
Shutdown Pin Threshold
Off-Time (Note 3)
T
85 C (Note 4), V
Pin Discharge Current
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
HARA TERISTICS
10
= V
24
C
= 10V, unless otherwise noted.
CONDITIONS
V
LTC1142L-ADJ (Note 5)
LTC1142HV-ADJ, LTC1142L-ADJ
LTC1142, LTC1142HV
LTC1142, LTC1142HV
0V < V
V
C
C
LTC1142HV-ADJ Only: V
LTC1142HV-ADJ Only
LTC1142, LTC1142HV
LTC1142
LTC1142HV-ADJ, LTC1142HV
LTC1142L-ADJ (Note 5)
LTC1142HV-ADJ, LTC1142L-ADJ
LTC1142, LTC1142HV
LTC1142, LTC1142HV
C
OUT
OUT
T
L
T
= 390pF, I
= 3000pF (Pins 6, 9, 20, 23), V
= 390pF, I
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
V
V
LOAD
LOAD
SD1
14
14
28
28
14
14
SHUTDOWN
SHUTDOWN
SD1
14
14
28
28
14
14
in Regulation, V
= 0V
SHUTDOWN
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
= 700mA, V
= 700mA, V
10
24
10
24
28
28
OUT
OUT
OUT
OUT
28
28
OUT
OUT
OUT
OUT
10
10
SD2
10
10
, V
, V
SD2
< 12V, 6V < V
< 18V, 6V < V
LOAD
LOAD
= V
= V
= V
= V
, V
, V
T
, V
, V
+ 100mV (Forced)
– 100mV (Forced)
+ 100mV (Forced)
– 100mV (Forced)
24
24
+ 100mV (Forced)
– 100mV (Forced)
+ 100mV (Forced)
– 100mV (Forced)
A
= 2.1V, 4V < V
= 2.1V, 4V < V
= 2.1V, 3.5V < V
= 2.1V, 3.5V < V
24
24
OUT
OUT
24
24
OUT
OUT
< 8V, V
< 12V
< 18V
= 25 C, V
= 700mA
= 700mA
< 12V
< 12V
< 12V
< 12V
+ 100mV, V
– 100mV, V
+ 100mV, V
– 100mV, V
SENSE
24
10
= 9V
= 9V
10
10
, V
10
10
, V
–
LTC1142/LTC1142L/LTC1142HV
10
= V
24
< 12V
< 18V
24
10
10
= V
= 16V
OUT
= 9V
, V
, V
10
2
2
10
2
2
10
= V
= V
= V
= V
, V
24
24
, V
24
, V
24
16
16
< 12V
< 12V
24
= 10V, V
16
16
24
< 12V
< 12V
= V
= V
= V
= V
= 6V
REF
REF
REF
REF
+ 25mV
– 25mV
SHUTDOWN
+ 25mV
– 25mV
= 0V, unless otherwise noted.
MIN
1.21
3.17
4.85
0.55
130
130
130
130
125
125
0.5
3.8
50
4
TYP
1.25
3.33
5.05
160
150
150
150
100
1.6
0.8
1.2
160
160
160
150
150
150
0.2
1.6
1.6
1.6
0.8
10
25
25
25
70
10
10
10
25
25
25
2
5
5
MAX
1.29
3.40
5.20
230
170
170
170
200
260
280
260
170
175
175
2.4
2.6
2.4
2.1
20
90
10
22
24
22
2
5
6
1
2
6
UNITS
3
mA
mV
mV
mV
mV
mV
mV
mA
mA
mA
mV
mV
mV
mV
mV
mV
ns
A
A
V
A
A
A
s
V
A
V
V
A
A
A
A
A
A
V
s