Datasheet

LTC3618
6
3618fc
For more information www.linear.com/LTC3618
Switch On-Resistance
vs Input Voltage
Load Step Transient in Forced
Continuous Mode, Internal
Compensation
Load Step Transient in Forced
Continuous Mode, Internal
Compensation
Load Step Transient in
Forced Continuous Mode,
Internal Compensation
Reference Voltage
vs Temperature
Switching Frequency vs Input
VoltageFrequency vs R
T
Frequency vs Temperature
Typical perForMance characTerisTics
Switch On-Resistance
vs Temperature
T
A
= 25°C, V
IN
= 3.3V, f = 1MHz, Figure 3 Circuit,
unless otherwise noted.
TEMPERATURE (°C)
–50
0.594
REFERENCE VOLTAGE (V)
0.596
0.600
0.602
0.604
–10
30
50 130
3618 G13
0.598
–30 10
70
90
110
0.606
TEMPERATURE (°C)
–40
R
DS(ON)
(mΩ)
40
90
100
–10
20
50
20
70
30
80
10
0
60
50
–25
5
80
35
65
110 12595
3618 G15
SYNCHRONOUS SWITCH
MAIN SWITCH
TEMPERATURE (°C)
–50
–1.2
FREQUENCY VARIATION (%)
–1.0
–0.6
–0.4
–0.2
0.8
0.2
–10
30
50 130
3618 G17
–0.8
0.4
0.6
0
–30 10
70
90
100
R
T
= SV
IN
V
DDQ
500mV/DIV
I
L
2A/DIV
3618 G10
V
IN
= 5V
V
DDQ
= 1.8V
I
LOAD
= –3A TO 3A
10µs/DIV
V
TT
100mV/DIV
I
L
1A/DIV
3618 G11
V
IN
= 5V
V
TT
= 0.9V
I
LOAD
= 0A TO 2A
20µs/DIV
V
TT
100mV/DIV
I
L
1A/DIV
3618 G12
V
IN
= 5V
V
TT
= 0.9V
I
LOAD
= –1A TO 1A
20µs/DIV
RESISTOR ON RT/SYNC PIN (kΩ)
0
0
FREQUENCY (MHz)
0.5
1.5
2.0
2.5
800
4.5
3618 G16
1.0
400
200
1000 1200
600 1400
3.0
3.5
4.0
INPUT VOLTAGE (V)
2.25
0
R
DS(ON)
(Ω)
0.01
0.03
0.04
0.05
0.10
0.09
0.08
0.07
3618 G14
0.02
0.06
4.253.25 5.25
MAIN SWITCH
SYNCHRONOUS SWITCH
INPUT VOLTAGE (V)
2.25
0.5
f
OSC
(MHz)
2.3
0.9
1.1
1.3
2.5
1.7
3.25 5.25
3618 G18
0.7
1.9
2.1
1.5
2.75
4.253.75
4.75
R
T
= 402kΩ
R
T
= SV
IN