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LTC1142_00 Datasheet(数据表) 3 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) 3 Page - Linear Technology

 
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3
LTC1142/LTC1142L/LTC1142HV
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
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.
V2, V16
Feedback Voltage
LTC1142HV-ADJ Only: V10, V24 = 9V
1.21
1.25
1.29
V
I2, I16
Feedback Current
LTC1142HV-ADJ Only
0.2
1
µA
VOUT
Regulated Output Voltage
LTC1142, LTC1142HV
3.3V Output
ILOAD = 700mA, V24 = 9V
3.17
3.33
3.43
V
5V Output
ILOAD = 700mA, V10 = 9V
4.85
5.05
5.20
V
I10, I24
Input DC Supply Current (Note 3)
LTC1142
Normal Mode
4V < V10, V24 < 12V
1.6
2.4
mA
Sleep Mode
4V < V24 < 12V, 6V < V10 < 12V
160
260
µA
Shutdown
VSHDN = 2.1V, 4V < V10, V24 < 12V
10
22
µA
Input DC Supply Current (Note 3)
LTC1142HV-ADJ, LTC1142HV
Normal Mode
4V < V10, V24 < 18V
1.6
2.6
mA
Sleep Mode
4V < V24 < 18V, 6V < V10 < 18V
160
280
µA
Shutdown
VSHDN = 2.1V, 4V < V10, V24 < 12V
10
24
µA
Input DC Supply Current (Note 3)
LTC1142L-ADJ (Note 6)
Normal Mode
3.5V < V10, V24 < 12V
1.6
2.4
mA
Sleep Mode
3.5V < V10, V24 < 12V
160
260
µA
Shutdown
VSD1 = VSD2 = 2.1V, 3.5V < V10, V24 < 12V
10
22
µA
V1 – V28
Current Sense Threshold Voltage
LTC1142HV-ADJ, LTC1142L-ADJ
V15 – V14
V14 = V28 = VOUT + 100mV, V2 = V16 = VREF + 25mV
25
mV
V14 = V28 = VOUT – 100mV, V2 = V16 = VREF – 25mV
125
150
175
mV
LTC1142, LTC1142HV
V28 = VOUT + 100mV (Forced)
25
mV
V28 = VOUT – 100mV (Forced)
125
150
175
mV
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input DC Supply Current (Note 3)
LTC1142HV, LTC1142HV-ADJ
Normal Mode
4V < V10, V24 < 18V
1.6
2.3
mA
Sleep Mode
4V < V24 < 18V, 6V < V10 < 18V
160
250
µA
Shutdown
VSD1 = VSD2 = 2.1V, 4V < V10, V24 < 18V
10
22
µA
Input DC Supply Current (Note 3)
LTC1142L-ADJ (Note 6)
Normal Mode
3.5V < V10, V24 < 12V
1.6
2.1
mA
Sleep Mode
3.5V < V10, V24 < 12V
160
230
µA
Shutdown
VSD1 = VSD2 = 2.1V, 3.5V < V10, V24 < 12V
10
20
µA
V1 – V28
Current Sense Threshold Voltage
LTC1142HV-ADJ, LTC1142L-ADJ
V15 – V14
V14 = V28 = VOUT + 100mV, V2 = V16 = VREF + 25mV
25
mV
V14 = V28 = VOUT – 100mV, V2 = V16 = VREF – 25mV
q
130
150
170
mV
LTC1142, LTC1142HV
V28 = VOUT + 100mV (Forced)
25
mV
V28 = VOUT – 100mV (Forced)
q
130
150
170
mV
LTC1142, LTC1142HV
V14 = VOUT + 100mV (Forced)
25
mV
V14 = VOUT – 100mV (Forced)
q
130
150
170
mV
VSHDN
Shutdown Pin Threshold
0.5
0.8
2
V
ISHDN
Shutdown Pin Input Current
0V < VSHDN < 8V, V10, V24 = 16V
1.2
5
µA
I11, I24
CT Pin Discharge Current
VOUT in Regulation, VSENSE– = VOUT
50
70
90
µA
VOUT = 0V
2
10
µA
tOFF
Off-Time (Note 4)
CT = 390pF, ILOAD = 700mA
4
5
6
µs
tr, tf
Driver Output Transition Times
CL = 3000pF (Pins 6, 9, 20, 23), V10, V24 = 6V
100
200
ns
–40
°C ≤ TA ≤ 85°C (Note 5), V10 = V24 = 10V, unless otherwise noted.




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