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LTC1142_00 Datasheet(数据表) 2 Page - Linear Technology

部件型号  LTC1142
说明  Dual High Efficiency Synchronous Step-Down Switching Regulators
下载  20 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
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LTC1142 Datasheet(HTML) 2 Page - Linear Technology

 
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LTC1142/LTC1142L/LTC1142HV
Input Supply Voltage (Pins 10, 24)
LTC1142, LTC1142L-ADJ ..................... 16V to – 0.3V
LTC1142HV, LTC1142HV-ADJ ............. 20V to – 0.3V
Continuous Output Current (Pins 6, 9, 20, 23) .... 50mA
Sense Voltages (Pins 1, 14, 15, 28)
VIN > 13V.............................................. 13V to –0.3V
VIN < 13V.................................. (VIN + 0.3V) to –0.3V
Operating Ambient Temperature Range ...... 0
°C to 70°C
Extended Commercial
Temperature Range ........................... – 40
°C to 85°C
Junction Temperature (Note 2) ............................ 125
°C
Storage Temperature Range ................ – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300
°C
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
ELECTRICAL CHARACTERISTICS
ORDER PART
NUMBER
Consult factory for Industrial and Military grade parts.
ORDER PART
NUMBER
LTC1142CG
LTC1142HVCG
LTC1142HVCG-ADJ
LTC1142LCG-ADJ
TJMAX = 125°C, θJA = 95°C/W
TJMAX = 125°C, θJA = 95°C/W
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
G PACKAGE
28-LEAD PLASTIC SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SENSE +3
SHDN3
SGND3
PGND3
NC
NDRIVE 3
NC
NC
PDRIVE 5
VIN5
CT5
INTVCC5
ITH5
SENSE 5
SENSE 3
ITH3
INTVCC3
CT3
VIN3
PDRIVE 3
NC
NC
NDRIVE 5
NC
PGND5
SGND5
SHDN5
SENSE +5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
G PACKAGE
28-LEAD PLASTIC SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SENSE+1
VFB1
SHDN1
SGND1
PGND1
NDRIVE 1
NC
NC
PDRIVE 2
VIN2
CT2
INTVCC2
ITH2
SENSE 2
SENSE 1
ITH1
INTVCC1
CT1
VIN1
PDRIVE 1
NC
NC
NDRIVE 2
PGND2
SGND2
SHDN2
VFB2
SENSE +2
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V2, V16
Feedback Voltage
LTC1142HV-ADJ, LTC1142L-ADJ : V10, V24 = 9V
q
1.21
1.25
1.29
V
I2, I16
Feedback Current
LTC1142HV-ADJ, LTC1142L-ADJ
q
0.2
1
µA
VOUT
Regulated Output Voltage
LTC1142, LTC1142HV
3.3V Output
ILOAD = 700mA, V24 = 9V
q
3.23
3.33
3.43
V
5V Output
ILOAD = 700mA, V10 = 9V
q
4.90
5.05
5.20
V
∆VOUT
Output Voltage Line Regulation
V10, V24 = 7V to 12V, ILOAD = 50mA
– 40
0
40
mV
Output Voltage Load Regulation
Figure 1 Circuit
3.3V Output
5mA < ILOAD < 2A
q
40
65
mV
5V Output
5mA < ILOAD < 2A
q
60
100
mV
Output Ripple (Burst Mode)
ILOAD = 0A
50
mVP-P
I10, I24
Input DC Supply Current (Note 3)
LTC1142
Normal Mode
4V < V10, V24 < 12V
1.6
2.1
mA
Sleep Mode
4V < V24 < 12V, 6V < V10 < 12V
160
230
µA
Shutdown
VSD1 = VSD2 = 2.1V, 4V < V10, V24 < 12V
10
20
µA
The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. V10 = V24 = 10V, VSHDN = 0V unless otherwise noted.
(Note 1)




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