LTC3408EDD Linear Technology, LTC3408EDD Datasheet - Page 3

• Manufacturer Part Number: LTC3408EDD
• Description: IC REG BUCK W/BYPASS TXRX 8-DFN
• Manufacturer: Linear Technology

Specifications of LTC3408EDD

• Applications: Converter, WCDMA Power Amplifier Applications
• Voltage - Input: 2.5 ~ 5 V
• Number Of Outputs: 1
• Voltage - Output: 0.3 ~ 3.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-DFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Note 4: When V
in parallel with the bypass PFET reducing the overall R
Note 5: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
ELECTRICAL CHARACTERISTICS
TYPICAL PERFOR A CE CHARACTERISTICS
110
100
100
90
80
70
60
50
90
80
70
60
50
40
30
20
10
0
0.1
Efficiency vs V
0
Efficiency vs Output Current
T
V
T
V
A
IN
A
OUT
= 25°C
= 3.6V
= 25°C
= 2.5V
V
REF
IN
1
1
OUTPUT CURRENT (mA)
= 3.6V
100mA
> 1.2V and V
V
OUT
OUT
V
10
2
IN
(V)
600mA
= 4.2V
REF
100
x3 > V
3
W
3408 G02
3408 G05
IN
U
, the P-channel FET will be on
1000
4
DS(ON)
1.70
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
100
90
80
70
60
50
40
30
20
10
0
–50
0.1
Efficiency vs Output Current
.
Oscillator Frequency
vs Temperature
T
V
V
A
OUT
IN
= 25°C
–25
= 3.6V
= 1.2V
1
OUTPUT CURRENT (mA)
V
0
TEMPERATURE (°C)
IN
= 3.6V
25
10
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
V
50
IN
= 4.2V
75
100
100
(From Figure 1)
3408 G03
3408 G06
1000
125
100
1.8
1.7
1.6
1.5
1.4
1.3
1.2
90
80
70
60
50
40
30
20
10
0
0.1
2
Oscillator Frequency
vs Supply Voltage
Efficiency vs Output Current
T
T
V
A
A
OUT
= 25°C
= 25°C
= 1.5V
1
OUTPUT CURRENT (mA)
3
V
SUPPLY VOLTAGE (V)
IN
= 3.6V
10
4
V
IN
LTC3408
= 4.2V
100
5
3408 G07
3408 G04
3
1000
3408f
6