LTC1142-ADJ Linear Technology, LTC1142-ADJ Datasheet - Page 2

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

LTC1142/LTC1142L/LTC1142HV
A
Input Supply Voltage (Pins 10, 24)
Continuous Output Current (Pins 6, 9, 20, 23) .... 50mA
Sense Voltages (Pins 1, 14, 15, 28).......... 13V to – 0.3V
Operating Ambient Temperature Range ...... 0 C to 70 C
PACKAGE/ORDER I FOR ATIO
2
ELECTRICAL C
SYMBOL
V
I
V
I
Consult factory for Industrial and Military grade parts.
2
10
2
OUT
V
, I
SHUTDOWN 3
, V
BSOLUTE
, I
OUT
LTC1142, LTC1142L-ADJ ..................... 16V to – 0.3V
LTC1142HV, LTC1142HV-ADJ ............. 20V to – 0.3V
16
24
16
NDRIVE 3
PDRIVE 5
SENSE
SENSE
INT V
SGND 3
PGND 3
V
I
C
CC5
TH5
NC
NC
NC
IN5
–
+
T5
3
5
T
G PACKAGE, 28-LEAD SSOP
JMAX
10
11
12
13
14
PARAMETER
Feedback Voltage
Feedback Current
Regulated Output Voltage
Output Voltage Line Regulation
Output Voltage Load Regulation
Output Ripple (Burst Mode)
Input DC Supply Current (Note 2)
Input DC Supply Current (Note 2)
1
2
3
4
5
6
7
8
9
= 125 C,
3.3V Output
5V Output
3.3V Output
5V Output
Normal Mode
Sleep Mode
Shutdown
Normal Mode
Sleep Mode
Shutdown
TOP VIEW
LTC1142
W
JA
A
HARA TERISTICS
= 95 C/W
XI
28
27
26
25
24
23
22
21
20
19
18
17
16
15
W
SENSE
I
INT V
C
V
PDRIVE 3
NC
NC
NDRIVE 5
NC
PGND5
SGND5
SHUTDOWN 5
SENSE
TH3
T3
IN3
U
C
U
CC3
W
–
+
3
5
R
A
LTC1142CG
LTC1142HVCG
ORDER PART
W
CONDITIONS
LTC1142HV-ADJ, LTC1142L-ADJ : V
LTC1142HV-ADJ, LTC1142L-ADJ
LTC1142, LTC1142HV
V
Figure 1 Circuit
I
LTC1142
LTC1142HV, LTC1142HV-ADJ
TI
LOAD
NUMBER
10,
I
I
5mA < I
5mA < I
4V < V
4V < V
V
4V < V
4V < V
V
U
LOAD
LOAD
V
SD1
SD1
24
= 0A
G
= 7V to 12V, I
= V
= V
= 700mA, V
= 700mA, V
10
24
10
24
S
LOAD
LOAD
, V
SD2
, V
SD2
T
< 12V, 6V < V
< 18V, 6V < V
A
U
24
24
= 25 C, V
= 2.1V, 4V < V
= 2.1V, 4V < V
< 2A
< 2A
< 12V
< 18V
24
10
SHUTDOWN 1
LOAD
= 9V
= 9V
Extended Commercial
Junction Temperature (Note 1) ............................ 125 C
Storage Temperature Range ................ – 65 C to 150 C
Lead Temperature (Soldering, 10 sec)................. 300 C
NDRIVE 1
PDRIVE 2
SENSE
SENSE
INT V
10
10
10
SGND1
PGND1
= 50mA
Temperature Range ........................... – 40 C to 85 C
< 12V
< 18V
V
= V
V
I
C
CC2
TH2
FB1
10
10
IN2
NC
NC
–
+
T2
1
2
T
, V
, V
24
G PACKAGE, 28-LEAD SSOP
JMAX
10
11
12
13
14
1
2
3
4
5
6
7
8
9
24
24
= 10V, V
10
< 12V
< 18V
= 125 C,
, V
LTC1142-ADJ
TOP VIEW
24
= 9V
SHUTDOWN
JA
= 95 C/W
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SENSE
I
INT V
C
V
PDRIVE 1
NC
NC
NDRIVE 2
PGND2
SGND2
SHUTDOWN 2
V
SENSE
TH1
T1
IN1
FB2
= 0V, unless otherwise noted.
MIN
1.21
3.23
4.90
– 40
CC1
–
+
1
2
1.25
3.33
5.05
TYP
160
160
0.2
1.6
1.6
LTC1142HVCG-ADJ
LTC1142LCG-ADJ
40
60
50
10
10
0
ORDER PART
NUMBER
MAX
1.29
3.43
5.20
100
230
250
2.1
2.3
40
65
20
22
1
UNITS
mV
mV
mV
mV
mA
mA
P-P
V
A
V
V
A
A
A
A