LT1618 LINER [Linear Technology], LT1618 Datasheet - Page 3

• Manufacturer Part Number: LT1618
• Description: Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter
• Manufacturer: LINER [Linear Technology]

temperature range, otherwise specifications are at T
PARAMETER
Switch Leakage Current
SHDN Pin Current
Shutdown Threshold (SHDN Pin)
Start-Up Threshold (SHDN Pin)
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT1618 is guaranteed to meet performance specifications
from 0 C to 70 C. Specifications over the – 40 C to 85 C operating
ELECTRICAL CHARACTERISTICS
TYPICAL PERFOR A CE CHARACTERISTICS
500
400
300
200
100
52
51
50
49
48
0
– 50
Switch Saturation Voltage
(V
0
Current Sense Voltage
(I
ADJ
CE, SAT
– 25
Pin = 0V)
T
0.5
)
J
SWITCH CURRENT (A)
= 25 C
0
TEMPERATURE ( C)
25
T
J
1.0
T
= –50 C
J
= 125 C
50
75
1.5
W
100
1618 G01
1618 G04
U
2.0
125
1.270
1.265
1.260
1.255
1.250
– 50
60
50
40
30
20
10
FB Pin Voltage and Bias Current
0
0.0
Current Sense Voltage
(V
A
CONDITIONS
Switch Off, V
V
SHDN
= 25 C. V
– 25
ISP, ISN
0.2
The
= 1.6V
0
0.4
TEMPERATURE ( C)
)
I
ADJ
IN
SW
0.6
25
denotes specifications which apply over the full operating
PIN VOLTAGE (V)
= 1.6V, V
VOLTAGE
= 5V
0.8
temperature range are assured by design, characterization, and correlation
with statistical process controls.
Note 3: Bias currents flow into the ISP and ISN pins.
50
CURRENT
1.0
75
SHDN
1.2
100
= 1.6V, unless otherwise noted.
1618 G02
1.4
1618 G05
125
4
2
0
– 2
– 4
1.6
2.5
2.0
1.5
1.0
0.5
2.5
2.0
1.5
1.0
0.5
0
0
– 50
– 50
Switch Current Limit
Quiescent Current
MIN
– 25
– 25
1
V
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
IN
= 18V
0.01
TYP
5
25
25
V
IN
50
= 1.6V
50
LT1618
MAX
0.3
20
5
75
75
100
100
1618 G03
UNITS
1618 G06
3
125
125
A
A
V
V