lt1373hv Linear Technology Corporation, lt1373hv Datasheet - Page 3

• Manufacturer Part Number: lt1373hv
• Description: 250khz Low Supply Current High Efficiency 1.5a Switching Regulator
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
The
V
TYPICAL PERFOR A CE CHARACTERISTICS
SYMBOL
BV
V
I
I
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
LIM
Q
SAT
IN
I
I
SW
IN
1.0
0.9
0.8
0.7
0.4
0.3
0.2
0.1
0.6
0.5
= 5V, V
0
Switch Saturation Voltage
vs Switch Current
0
denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
0.2
C
PARAMETER
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 Pin Input Current
Synchronization Frequency Range
0.4
= 0.6V, V
SWITCH CURRENT (A)
0.6
0.8
FB
1.0
100 C
= V
1.2
–55 C
REF
150 C
1.4
, V
W
1.6
SW
LT1373 • G01
25 C
1.8
, S/S and NFB pins open, unless otherwise noted.
U
2.0
3.0
2.5
2.0
1.5
1.0
0.5
0
0
Switch Current Limit
vs Duty Cycle
10
CONDITIONS
LT1373
LT1373HV
I
Duty Cycle = 50%
Duty Cycle = 80% (Note 2)
2.7V V
2.7V V
2.7V V
0V V
SW
20
0 C T
– 40 C T
0 C T
– 40 C T
= 1A
30
DUTY CYCLE (%)
S/S
IN
IN
IN
40
J
J
5V
J
J
50
125 C
25V
25V, V
125 C
25V
Note 2: For duty cycles (DC) between 50% and 90%, minimum
guaranteed switch current is given by I
0 C (I Grade)
0 C (I Grade)
60
–55 C
S/S
70
25 C AND
125 C
80
0.6V
LT1373 • G02
90
100
3.0
2.6
2.4
2.0
1.8
2.8
2.2
–50
MIN
– 10
300
1.5
1.3
0.6
Minimum Input Voltage
vs Temperature
35
42
40
5
–25
LIM
= 0.667 (2.75 – DC).
0
TEMPERATURE ( C)
TYP
0.5
1.9
1.7
2.4
1.3
47
47
10
12
12
2
1
25
50
A
= 25 C.
75
MAX
0.85
LT1373
100
340
2.7
2.5
2.7
1.5
20
30
50
15
2
100
LT1373 • G03
125
UNITS
mA/A
3
A/V
kHz
mA
150
V
V
V
A
A
V
A
A
V
A
s