LT1619 Linear Technology, LT1619 Datasheet - Page 3

• Manufacturer Part Number: LT1619
• Description: Low Voltage Current Mode PWM Controller
• Manufacturer: Linear Technology

ELECTRICAL CHARACTERISTICS
The
V
PARAMETER
Current Sense Input Current
Current Limit Delay
Driver Output Rise Time
Driver Output Fall Time
Driver Output High Level
Driver Output Low Level
Shutdown Driver Output Level
Idle Mode Driver Output Level
S/S Pin Current
Operating Supply Current
Quiescent Supply Current
Shutdown Supply Current
Shutdown Threshold
Shutdown Delay
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: The LT1619E is guaranteed to meet performance specifications
from 0 C to 70 C. Specifications over the – 40 C to 85 C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
TYPICAL PERFOR A CE CHARACTERISTICS
IN
1.245
1.243
1.241
1.239
1.237
1.235
1.233
1.231
1.229
1.227
1.225
= V
–40
denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
DRV
Bandgap Voltage vs Temperature
V
IN
–20
= 2.5V, V
= 2.5V
0
TEMPERATURE ( C)
20
S/S
= V
40
IN
60
, COMP open, V
W
80
100
1619 G01
U
120
CONDITIONS
V
C
C
I
I
I
I
V
V
V
V
V
V
V
V
SENSE
OUT
OUT
OUT
OUT
SENSE
L
L
S/S
S/S
S/S
S/S
FB
S/S
S/S
S/S
= 3300pF
= 3300pF
= 1V
= – 20mA
= – 200mA
= 20mA
= 200mA
= 0V, I
= V
= V
= 0V
= V
= 0V
= 0V, V
= 0V unless otherwise noted.
= 0V
–1
–2
–3
IN
IN
IN
5
4
3
2
1
0
, V
, V
0
I
OUT
S/S
IN
FB
FB
0.5
= 18V, T
= 1.5V, I
= 1.5V
vs V
= 20mA
1.0
S/S
1.5
A
OUT
= 85 C
2.0
V
= 20mA
T
S/S
T
T
A
Note 3: T
dissipation P
the formula:
2.5
A
A
= –40 C
= 25 C
= 85 C
(V)
T
3.0
J
= T
3.5
J
A
is calculated from the ambient temperature T
+ P
4.0
D
and the thermal resistance
D
4.5
1619 G02
•
JA
5.0
V
V
DRV
DRV
MIN
0.45
– 90
12
– 0.6
– 1.6
–1
–2
–3
5
4
3
2
1
0
–40
S/S Pin Current vs Temperature
–20
V
V
DRV
DRV
– 120
TYP
150
100
100
100
140
0.5
30
35
15
40
17
JA
0
9
– 0.35
– 1.2
V
TEMPERATURE ( C)
of the package according to
S/S
V
20
S/S
= 0V
= 2.5V
40
A
A
– 150
MAX
= 25 C.
, the power
200
200
200
220
0.7
1.2
– 2
19
33
60
4
LT1619
80
100
1619 G03
UNITS
1619fa
3
mV
mV
mV
mA
120
ns
ns
ns
A
V
V
V
A
A
A
A
A
V
s