LTC3408 LINER [Linear Technology], LTC3408 Datasheet - Page 4

• Manufacturer Part Number: LTC3408
• Description: 1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor
• Manufacturer: LINER [Linear Technology]

LTC3408
TYPICAL PERFOR A CE CHARACTERISTICS
4
1600
1400
1200
1000
800
600
400
0.7
0.4
0.3
0.2
0.6
0.5
0.1
0
–50
Frequency vs V
0
R
SWITCH
T
V
DS(ON)
MAIN
A
IN
–25
= 25°C
= 3.6V
0.2
BYPASS
SWITCH
vs Temperature
V
0
IN
TEMPERATURE (°C)
0.4
= 4.2V
25
V
OUT
OUT
SYNCHRONOUS SWITCH
120
100
0.6
V
20
80
60
40
IN
0
V
(V)
50
V
IN
0
= 3.6V
IN
Switch Leakage vs Input Voltage
T
RUN = 0V
V
= 4.2V
A
IN
= 3V
0.8
= 25°C
= 2.7V
75
1
W
1.0
100
INPUT VOLTAGE (V)
SYNCHRONOUS
3408 G11
3408 G08
2
U
125
1.2
SWITCH
3
SWITCH
MAIN
4
1.844
1.834
1.824
1.814
1.804
1.794
1.784
1.774
4000
3500
3000
2500
2000
1500
1000
4500
500
0
0
2
Output Voltage vs Load Current
Dynamic Supply Current
vs Supply Voltage
5
T
V
T
V
I
LOAD
A
IN
A
OUT
100
3408 G14
= 25°C
= 25°C
= 3.6V
= 1.8V
200 300
= 0A
6
3
SUPPLY VOLTAGE (V)
LOAD CURRENT (mA)
FORCED CONTINUOUS
MODE
400
500
4
600
500mA/DIV
700
2V/DIV
1V/DIV
5
800
V
RUN
OUT
I
900 1000
L
3408 G12
(From Figure 1)
3408 G09
V
V
R
Start-Up from Shutdown
IN
REF
LOAD
6
= 3.6V
= 0.6V
= 3Ω
300
250
200
150
100
0.7
0.4
0.3
0.2
0.6
0.5
0.1
50
0
0
–50
40µs/DIV
0
Switch Leakage vs Temperature
R
T
V
RUN = 0V
SYNCHRONOUS
A
IN
DS(ON)
= 25°C
–25
= 5.5V
1
SYNCHRONOUS SWITCH
SWITCH
vs Input Voltage
2
0
INPUT VOTLAGE (V)
TEMPERATURE (°C)
MAIN
SWITCH
25
3
3408 G15
BYPASS
SWITCH
MAIN SWITCH
50
4
75
5
100
6
3408 G10
3408 G13
3408f
125
7