Datasheet

LT3460/LT3460-1
3
3460fb
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C, V
IN
= 3V, V
SHDN
= 3V, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Minimum Operating
Voltage
2.5 2.5 V
Maximum Operating
Voltage
16 16 V
Feedback Voltage
l
1.235
1.225
1.255 1.275
1.280
1.235
1.225
1.255 1.275
1.280
V
V
Feedback Line Regulation 2.5V < V
IN
< 16V 0.015 0.015 %/V
FB Pin Bias Current
l
5 25 80 0 25 80 nA
Supply Current
SHDN = 0V
2.0
0.1
3.0
0.5
1.0
0.1
1.5
0.5
mA
μA
Switching Frequency 1.0 1.3 1.7 0.35 0.65 1.0 MHz
Maximum Duty Cycle 85 90 80 90 %
Switch Current Limit 300 420 600 180 260 380 mA
Switch V
CESAT
I
SW
= 250mA (LT3460), I
SW
= 100mA (LT3460-1) 320 450 220 350 mV
Switch Leakage Current V
SW
= 5V 0.01 1 0.01 1 μA
SHDN Voltage High 1.5 1.5 V
SHDN Voltage Low 0.4 0.4 V
SHDN Pin Bias Current 40 15 μA
Note 2: The LT3460E/LT3460-1E is guaranteed to meet specifi cations from
0°C to 70°C. Specifi cations over the –40°C to 85°C operating temperature
range are assured by design, characterization and correlation with
statistical process controls.
LT3460 LT3460-1
TYPICAL PERFORMANCE CHARACTERISTICS
Quiescent Current Switching Frequency SHDN Pin Bias Current
V
IN
(V)
0
2.0
10
3460 G01
1.5
0.5
1.0
5
15
0
I
Q
(mA)
2.5
100°C
25°C
–50°C
LT3460
LT3460-1
TEMPERATURE (°C)
–50
0.8
1.0
1.2
25 75
3460 G02
0.6
0.4
–25 0
50 100
0.2
0
SWITCHING FREQUENCY (MHz)
1.4
LT3460
LT3460-1
TEMPERATURE (°C)
–50
250
300
350
25 75
3460 G03
200
150
100
–25 0
50 100
50
0
SHDN PIN BIAS CURRENT (μA)
400
SHDN = 3V (LT3460)
SHDN = 16V (LT3460)
SHDN = 16V (LT3460-1)
SHDN = 3V (LT3460-1)