ltc3405a-1.375 Linear Technology Corporation, ltc3405a-1.375 Datasheet - Page 3

• Manufacturer Part Number: ltc3405a-1.375
• Description: 1.375v, 1.5mhz, 300ma Synchronous Step-down Regulators In Thinsot
• Manufacturer: Linear Technology Corporation

(From Figure1a)
TYPICAL PERFOR A CE CHARACTERISTICS
1.70
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
90
80
70
60
50
40
30
2.5
–50
Efficiency vs Input Voltage
Oscillator Frequency vs
Temperature
V
Burst Mode OPERATION
IN
–25
= 3.6V
3.0
LOAD CURRENT (mA)
0
TEMPERATURE (°C)
3.5
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
25
0
4.0
0
R
DS(ON
50
SYNCHRONOUS
1
4.5
I
I
I
I
I
) vs Input Voltage
OUT
OUT
OUT
OUT
OUT
75
W
2
INPUT VOLTAGE (V)
= 0.1mA
= 1mA
= 10mA
= 100mA
= 250mA
SWITCH
5.0
3405A1375 G01
100
3405A1375 G04
MAIN SWITCH
3
U
5.5
125
4
5
100
1.8
1.7
1.6
1.5
1.4
1.3
1.2
90
80
70
60
50
40
30
20
10
3405A1375 G07
0
0.1
6
2
Oscillator Frequency vs
Supply Voltage
Efficiency vs Output Current
Burst Mode OPERATION
7
OUTPUT CURRENT (mA)
3
1
SUPPLY VOLTAGE (V)
PULSE SKIPPING MODE
10
4
100
5
3405A1375 G02
3405A1375 G05
1.2
1.0
0.8
0.6
0.4
0.2
0
T
–50
3.6V
4.2V
3.6V
4.2V
A
R
V
= 25°C unless otherwise noted.
1000
IN
DS(ON)
6
–25
= 2.7V
vs Temperature
0
1.395
1.385
1.375
1.365
1.355
1.345
TEMPERATURE (°C)
100
V
90
80
70
60
50
40
30
IN
0.1
= 3.6V
25
0
Efficiency vs Output Current
Output Voltage vs Load Current
SYNCHRONOUS SWITCH
MAIN SWITCH
LTC3405A-1.375
Burst Mode
OPERATION
V
50
IN
100
= 4.2V
1
OUTPUT CURRENT (mA)
PULSE SKIPPING MODE
75
CURRENT LOAD (mA)
200
100
3405A1375 G08
10
125
300
100
V
V
V
V
400
IN
IN
IN
IN
3405A1375 G03
3405A1375 G06
3405a1375f
= 2.7V
= 3.6V
= 4.2V
= 5.5V
3
1000
500