LT1371CSW Linear Technology, LT1371CSW Datasheet - Page 3

• Manufacturer Part Number: LT1371CSW
• Description: IC SWTCHNG REG 3A HI-EFF 20-SOIC
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost), Inverting, Cuk, Flyback, Forward Converterr

Specifications of LT1371CSW

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 35 V
• Current - Output: 3A
• Frequency - Switching: 500kHz
• Voltage - Input: 2.7 ~ 25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (0.300", 7.50mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

V
SYMBOL
V
I
g
A
f
BV
V
I
I
The
temperature range.
ELECTRICAL C
NFB
LIM
Q
m
NFB
V
SAT
IN
I
I
SW
IN
= 5V, V
denotes specifications which apply over the full operating
PARAMETER
Negative Feedback Reference Voltage
Negative Feedback Input Current
Negative Feedback Reference Voltage
Line Regulation
Error Amplifier Transconductance
Error Amplifier Source Current
Error Amplifier Sink Current
Error Amplifier Clamp Voltage
Error Amplifier Voltage Gain
V
Switching Frequency
Maximum Switch Duty Cycle
Switch Current Limit Blanking Time
Output Switch Breakdown Voltage
Output Switch ON Resistance
Switch Current Limit
Supply Current Increase During Switch ON Time
Control Voltage to Switch Current
Transconductance
Minimum Input Voltage
Supply Current
Shutdown Supply Current
Shutdown Threshold
Shutdown Delay
S/S or SHDN Pin Input Current
Synchronization Frequency Range
C
C
= 0.6V, V
Pin Threshold
FB
= V
HARA TERISTICS
REF
, V
SW
C
, S/S, SHDN, SYNC and NFB pins open, unless otherwise noted.
CONDITIONS
Measured at Negative Feedback Pin
Feedback Pin Open, V
V
2.7V V
V
V
High Clamp, V
Low Clamp, V
Duty Cycle = 0%
2.7V V
LT1371
LT1371HV
I
Duty Cycle = 50%
Duty Cycle = 80% (Note 1)
2.7V V
2.7V V
2.7V V
0V V
SW
NFB
FB
FB
I
0 C T
0 C T
0 C T
– 40 C T
– 40 C T
C
– 40 C T
= 25 A
= V
= V
= 2A
= V
S/S
REF
REF
NFR
IN
IN
IN
IN
IN
J
or V
J
J
+ 150mV, V
– 150mV, V
J
J
25V, V
25V
125 C
J
25V
25V, V
25V
Note 1: For duty cycles (DC) between 50% and 90%, minimum
guaranteed switch current is given by I
125 C
125 C
FB
FB
SHDN
0 C (I Grade)
0 C (I Grade)
= 1.5V
0 C (I Grade)
= 1V
C
S/S
= 0.8V
C
5V
C
C
= 0.8V
= 1.5V
= 1.5V
0.6V
– 2.540
– 2.570
1100
1.70
0.25
MIN
– 45
– 10
700
120
450
430
400
600
0.8
3.0
2.6
0.6
85
35
42
40
5
LIM
= 1.33 (2.75 – DC).
– 2.490
– 2.490
1500
1400
0.01
1.95
0.40
0.25
TYP
– 30
500
130
200
500
500
3.8
3.4
2.4
1.3
95
47
47
15
12
12
1
4
4
– 2.440
– 2.410
1900
2300
2400
MAX
1.25
0.05
2.30
0.52
0.45
– 15
350
550
580
580
260
800
5.4
5.0
2.7
5.5
LT1371
25
30
50
25
15
2
UNITS
mA/A
3
mho
mho
%/V
V/ V
kHz
kHz
kHz
A/V
kHz
mA
ns
%
V
V
A
A
A
V
V
V
V
V
V
A
A
V
A
A
V
A
s