LTC1143LCS-ADJ#PBF Linear Technology, LTC1143LCS-ADJ#PBF Datasheet - Page 3

• Manufacturer Part Number: LTC1143LCS-ADJ#PBF
• Description: IC SW REG STEP-DOWN DUAL 16-SOIC
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1143LCS-ADJ#PBF

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 2
• Voltage - Output: Adjustable
• Current - Output: 50mA
• Frequency - Switching: 400kHz
• Voltage - Input: 3.5 ~ 16 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

ELECTRICAL CHARACTERISTICS
The
range.
Note 1: T
dissipation P
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
SYMBOL
V
V
V
I
I
t
t
–40 C T
V
V
I
V
V
V
2
6
OFF
r
5
1
8
2
, t
2
OUT
1
8
2
, I
, I
, I
, V
, V
, V
to V
to V
to V
to V
f
LTC1143 series: T
10
14
13
10
10
10
denotes specifications which apply over the specified temperature
16
9
16
9
, Current Sense Threshold Voltage
, Current Sense Threshold Voltage
J
is calculated from the ambient temperature T
A
PARAMETER
Shutdown Pin Threshold
LTC1143/LTC1143L
Shutdown Pin Input Current
LTC1143/LTC1143L
C
Off-Time (Note 3)
Driver Output Transition Times
Feedback Voltage (LTC1143L-ADJ)
Regulated Output Voltage
LTC1143/LTC1143L
Input DC Supply Current (Note 2)
Shutdown Pin Threshold
LTC1143/LTC1143L
D
T
according to the following formula:
LTC1143/LTC1143L
LTC1143L-ADJ
Pin Discharge Current
3.3V Output
5V Output
LTC1143:
LTC1143L:
LTC1143L-ADJ: Normal Mode
LTC1143/LTC1143L
LTC1143L-ADJ
85 C (Note 4), V
J
= T
A
+ (P
D
Normal Mode
Sleep Mode
Shutdown
Normal Mode
Sleep Mode
Shutdown
Sleep Mode
IN
• 125 C/W)
= 10V unless otherwise noted.
CONDITIONS
V
V
V
V
V
0V < V
V
V
C
C
V
V
I
I
V
V
V
V
V
V
3.5V < V
3.5V < V
V
V
V
V
V
LOAD
LOAD
2
SENSE
SENSE
SENSE
SENSE
OUT
OUT
T
L
IN
IN3,
2
2
2
2
2
2
2
SENSE
SENSE
SENSE
SENSE
= 3000pF (Pins 4, 12), V
= V
= 390pF, I
= V
= V
= V
= V
= V
= V
= V
= 9V
A
V
in Regulation, V
= 0V
10
10
10
10
10
10
10
10
= 700mA
= 700mA
SHUTDOWN
IN5
–
–
–
–
and power
–
–
–
–
= 5V, V
= 5V, V
IN
IN
= 5V, V
= 5V, V
= V
= V
= V
= V
= 0V
= 0V
= 0V, 4V < V
= 0V, 4V < V
= 2.1V, 4V < V
= 0V, 3.5V < V
= 0V, 3.5V < V
= 2.1V, 3.5V < V
= 9V
< 12V
< 12V, V
OUT
OUT
OUT
OUT
LOAD
FB
FB
FB
FB
+ 100mV (Forced)
– 100mV (Forced)
+ 100mV (Forced)
– 100mV (Forced)
= < 8V, V
T
= V
= V
= V
= V
= 700mA
A
OUT
= 25 C, V
SENSE-
IN
IN3
OUT
OUT
OUT
OUT
IN
IN
IN3
< 12V
< 12V, 6V < V
IN
/4 + 25mV (Forced)
/4 – 25mV (Forced)
/4 + 25mV (Forced)
/4 – 25mV (Forced)
3.3V
< 12V
< 12V
IN3,
< 12V, 6V < V
< 12V
IN
= V
is higher due to the gate charge being delivered at the switching
frequency. See Applications Information.
Note 3: In applications where R
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.
V
= 6V
OUT
IN5
IN
= 10V unless otherwise noted.
= 16V
IN5
IN5
< 12V
< 12V
LTC1143/LTC1143L
SENSE
1.20
3.17
4.85
0.55
MIN
130
130
125
125
0.5
50
4
is placed at ground potential, the
LTC1143L-ADJ
TYP
1.25
3.33
5.05
150
150
100
160
160
160
150
150
0.8
1.2
1.6
1.6
1.6
0.8
25
25
70
10
10
25
25
2
5
MAX
1.30
3.43
5.20
170
170
200
260
260
260
185
185
2.4
2.4
2.4
90
10
22
22
2
5
6
2
UNITS
3
mV
mV
mV
mV
mA
mA
mA
mV
mV
mV
mV
ns
V
A
A
A
V
V
V
A
A
A
A
A
V
s