Datasheet

LT3469
3
3469f
PARAMETER CONDITIONS MIN TYP MAX UNITS
Switch Leakage Current V
SW
= 5V 0.01 1 µA
Diode V
F
I
D
= 100mA 740 1100 mV
Diode Reverse Leakage Current V
R
= 5V 0.1 1 µA
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2) V
IN
= 5V, V
CC
= 35V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT3469E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Current limit is guaranteed by design and/or correlation to static
test. Slope compensation reduces current limit at higher duty cycles.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Schottky Forward Voltage
Schottky Reverse Leakage
FORWARD VOLTAGE (mV)
200
SCHOTTKY CURRENT (mA)
150
200
250
500 700 1000
3469 G07
100
50
0
300 400
600
800 900
100°C
–50°C
25°C
TEMPERATURE (°C)
–50
0
LEAKAGE CURRENT (µA)
5
10
15
20
25
–25
02550
3469 G09
75 100
V
R
= 5V
Switching Frequency FB Pin Voltage and Bias Current
TEMPERATURE (°C)
–50
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
25 75
3469 G10
–25 0
50 100
SWITCHING FREQUENCY (MHz)
TEMPERATURE (°C)
–50
1.175
FB VOLTAGE (V)
FB BIAS CURRENT (nA)
1.195
1.215
1.235
1.255
1.275
0
10
20
30
40
50
–25
02550
3469 G11
75 100
CURRENT
VOLTAGE
(Switching Regulator)
V
IN
(V)
0
I
Q
(mA)
1.2
1.8
2.0
16
3469 G05
1.0
0.8
0
4
8
12
14
2
6
10
0.4
2.4
2.2
1.6
1.4
0.6
0.2
–50°C
100°C
25°C
DUTY CYCLE (%)
0
CURRENT LIMIT (mA)
150
200
250
80
3469 G06
100
50
0
20
40
60
100
T
A
= 25°C
V
IN
Quiescent Current Current Limit vs Duty Cycle