Datasheet

LT3988
5
3988f
Typical perForMance characTerisTics
Boost Diode Voltage vs Boost
Diode Current
Maximum V
IN
for Full Frequency
vs Load Current
Minimum Switch On-Time vs
Temperature
Minimum Switch Off-Time vs
Temperature
Undervoltage Lockout
vs Temperature
No-Load Supply Current vs
Input Voltage
Switch Voltage Drop vs Load
Current Boost Current vs Load Current
V
IN
(V)
0
I
Q
(mA)
3.5
3.3
3.0
2.8
2.6
3.4
3.2
2.9
2.7
3.1
2.5
20 4010 30 50
3988 G10
6015 355 25 45 55
0 20 40 60 80
BOOST DIODE VOLTAGE (V)
100
3988 G13
BOOST DIODE CURRENT (mA)
0.75
0
1.00
0.25
0.50
TEMPERATURE (°C)
–50
MINIMUM OFF-TIME (ns)
350
250
200
150
50
100
300
0
0 50–25 25 100
3988 G16
15075 125
0 0.2 0.4 0.6 0.8
VOLTAGE DROP (V)
1.0
3988 G11
LOAD CURRENT (A)
0.8
0
1.0
0.2
0.4
0.6
0 0.2 0.4 0.6 0.8
V
IN
(V)
1.0
3988 G14
LOAD CURRENT (A)
30
0
40
10
20
f = 1MHz
TEMPERATURE (°C)
–50
V
IN
UVLO (V)
4
3
1
2
0
0 50–25 25 100
3988 G17
15075 125
V
IN1
RISING
V
IN2
RISING
V
IN1
FALLING
V
IN2
FALLING
0 0.2 0.4 0.6 0.8
BOOST CURRENT (mA)
1.0
3988 G12
LOAD CURRENT (A)
15
0
20
5
10
TEMPERATURE (°C)
–50
MINIMUM ON-TIME (ns)
250
200
150
50
100
0
0 50–25 25 100
3988 G15
15075 125
T
A
= 25°C, unless otherwise noted.