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LTC1143LCS Datasheet(PDF) 3 Page - Linear Technology

Part # LTC1143LCS
Description  Dual High Efficiency SO-16 Step-Down Switching Regulator Controllers
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1143LCS Datasheet(HTML) 3 Page - Linear Technology

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LTC1143/LTC1143L
LTC1143L-ADJ
ELECTRICAL CHARACTERISTICS TA = 25°C, VIN = 10V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V1 to V16, Current Sense Threshold Voltage
V8 to V9
LTC1143/LTC1143L
V2 = V10 = 0V
VSENSE
= VOUT + 100mV (Forced)
25
mV
VSENSE
= VOUT – 100mV (Forced)
q
130
150
170
mV
LTC1143L-ADJ
VSENSE
= 5V, VFB = VOUT/4 + 25mV (Forced)
25
mV
VSENSE– = 5V, VFB = VOUT/4 – 25mV (Forced)
q
130
150
170
mV
V2, V10
Shutdown Pin Threshold
0.5
0.8
2
V
LTC1143/LTC1143L
I2, I10
Shutdown Pin Input Current
0V < VSHUTDOWN = < 8V, VIN3, VIN5 = 16V
1.2
5
µA
LTC1143/LTC1143L
I6, I14
CT Pin Discharge Current
VOUT in Regulation, VSENSE- = VOUT
50
70
90
µA
VOUT = 0V
2
10
µA
tOFF
Off-Time (Note 3)
CT = 390pF, ILOAD = 700mA
4
5
6
µs
tr, tf
Driver Output Transition Times
CL = 3000pF (Pins 4, 12), VIN = 6V
100
200
ns
–40
°C ≤ TA ≤ 85°C (Note 4), VIN = 10V unless otherwise noted.
V2, V10
Feedback Voltage (LTC1143L-ADJ)
VIN = 9V
1.20
1.25
1.30
V
VOUT
Regulated Output Voltage
VIN3, VIN5 = 9V
LTC1143/LTC1143L
3.3V Output
ILOAD = 700mA
3.17
3.33
3.43
V
5V Output
ILOAD = 700mA
4.85
5.05
5.20
V
I5, I13
Input DC Supply Current (Note 2)
LTC1143:
Normal Mode
V2 = V10 = 0V, 4V < VIN < 12V
1.6
2.4
mA
Sleep Mode
V2 = V10 = 0V, 4V < VIN3 < 12V, 6V < VIN5 < 12V
160
260
µA
Shutdown
V2 = V10 = 2.1V, 4V < VIN < 12V
10
22
µA
LTC1143L:
Normal Mode
V2 = V10 = 0V, 3.5V < VIN < 12V
1.6
2.4
mA
Sleep Mode
V2 = V10 = 0V, 3.5V < VIN3 < 12V, 6V < VIN5 < 12V
160
260
µA
Shutdown
V2 = V10 = 2.1V, 3.5V < VIN < 12V
10
22
µA
LTC1143L-ADJ: Normal Mode
3.5V < VIN < 12V
1.6
2.4
mA
Sleep Mode
3.5V < VIN < 12V, VOUT ≤ 3.3V
160
260
µA
V1 to V16, Current Sense Threshold Voltage
V8 to V9
LTC1143/LTC1143L
V2 = V10 = 0V
VSENSE
= VOUT + 100mV (Forced)
25
mV
VSENSE
= VOUT – 100mV (Forced)
125
150
185
mV
LTC1143L-ADJ
VSENSE
= 5V, VFB = VOUT/4 + 25mV (Forced)
25
mV
VSENSE– = 5V, VFB = VOUT/4 – 25mV (Forced)
125
150
185
mV
V2, V10
Shutdown Pin Threshold
0.55
0.8
2
V
LTC1143/LTC1143L
The q denotes specifications which apply over the specified temperature
range.
Note 1: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formula:
LTC1143 series: TJ = TA + (PD • 125°C/W)
Note 2: This supply current is for one regulator block. Total supply
current is the sum of Pin 5 and Pin 13 currents. Dynamic supply current
is higher due to the gate charge being delivered at the switching
frequency. See Applications Information.
Note 3: In applications where RSENSE is placed at ground potential, the
off-time increases approximately 40%.
Note 4: The LTC1143 series is guaranteed to meet specified performance
from 0
°C to 70°C and is designed, characterized and expected to meet
these extended temperature limits, but is not tested at –40
°C to 85°C.


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