LTC3549EDCB#TRPBF Linear Technology, LTC3549EDCB#TRPBF Datasheet - Page 4

• Manufacturer Part Number: LTC3549EDCB#TRPBF
• Description: IC REG BUCK 250MA 6-DFN
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC3549EDCB#TRPBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.61 ~ 5.5 V
• Current - Output: 250mA
• Frequency - Switching: 2.25MHz
• Voltage - Input: 1.6 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 6-DFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

(From Typical Application on the front page, except for the resistive divider resistor values)
LTC3549
TYPICAL PERFOR A CE CHARACTERISTICS
4
100
100
100
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
0
0
0.1
1.5
0.1
I
OUT
Effi ciency/Power Loss vs Load
Current, V
EFFICIENCY
Effi ciency vs Input Voltage
V
Effi ciency vs Load Current
V
OUT
OUT
:
0.1mA
1mA
V
V
V
= 1.2V, Pulse Skip
= 1.2V, Burst Mode
V
V
V
IN
IN
IN
IN
IN
IN
2.5
= 1.8V
= 2.5V
= 3.1V
1
1
= 1.6V
= 2.5V
= 3.1V
LOAD CURRENT (mA)
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
OUT
= 1.5V, Burst Mode
10mA
100mA
3.5
10
10
POWER LOSS
V
V
V
IN
IN
IN
= 1.8V
= 2.5V
= 3.1V
4.5
100
100
W
300mA
3549 G03
3549 G05a
3549 G01a
1000
1000
5.5
U
1
0.1
0.01
0.001
0.0001
100
100
100
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
0
0
0.1
0.1
0.1
Effi ciency vs Load Current
V
Effi ciency vs Load Current
V
Effi ciency/Power Loss vs Load
Current, V
OUT
L = 4.7µH
OUT
= 1.2V, Pulse Skip
= 1.8V, Burst Mode
V
V
V
IN
IN
IN
1
EFFICIENCY
1
1
= 1.6V
= 2.5V
= 3.1V
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
OUT
V
V
V
IN
IN
IN
= 1.5V, Pulse Skip
= 1.8V
= 2.5V
= 3.1V
10
10
10
POWER LOSS
EFFICIENCY
POWER LOSS
100
100
100
V
V
V
V
IN
V
V
V
IN
IN
IN
IN
IN
IN
= 3.6V
= 2.5V
= 3.6V
= 4.2V
= 1.8V
= 2.5V
= 3.1V
3549 G05b
3549 G04a
3549 G01b
1000
1000
1000
1
0.1
0.01
0.001
0.0001
1
0.1
0.01
0.001
0.0001
0.6132
0.6111
0.6090
0.6069
100
100
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
0
–50
1.5
0.1
Effi ciency vs Load Current
V
Reference Voltage
vs Temperature
Effi ciency vs Input Voltage
V
L = 4.7µH
I
OUT
OUT
OUT
–25
:
= 1.8V, Pulse Skip
= 1.2V, Burst Mode Operation
V
V
V
0.1mA
1mA
10mA
100mA
300mA
IN
IN
IN
2.5
1
= 1.6V
= 2.2V
= 4.2V
LOAD CURRENT (mA)
0
TEMPERATURE (ºC)
INPUT VOLTAGE (V)
25
3.5
10
50
EFFICIENCY
75
4.5
100
V
V
V
IN
IN
IN
100
= 2.5V
= 3.6V
= 4.2V
3549 G06
3549 G04b
3549f
3549 G02
1000
125
5.5