LTC3549EDCB#TRPBF Linear Technology, LTC3549EDCB#TRPBF Datasheet - Page 16

• 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: -

RELATED PARTS
LTC3549
TYPICAL APPLICATIO
PART NUMBER
LTC1878
LTC1879
LT3020
LTC3025
LTC3404
LTC3405/LTC3405A
LTC3406/LTC3406B
LTC3407/LTC3407-2
LTC3409
LTC3410/LTC3410B
LTC3411
VLDO and ThinSOT are trademarks of Linear Technology Corporation.
16
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
100
90
80
70
60
50
40
30
20
10
0
0.1
DESCRIPTION
600mA (I
Step-Down DC/DC Converter
1.20A (I
Step-Down DC/DC Converter
100mA, Low Voltage VLDO
100mA, Low Voltage VLDO
600mA (I
Step-Down DC/DC Converter
300mA (I
Step-Down DC/DC Converter
600mA (I
Step-Down DC/DC Converter
Dual, 800mA (I
Step-Down DC/DC Converter
600mA, 2.6MHz Low V
Step-Down DC/DC Converter
300mA, 2.25MHz, Synchronous Step-Down
DC/DC Converter
1.25A (I
Step-Down DC/DC Converter
V
OUT
●
Effi ciency vs Load Current
FAX: [phone]
= 1.8V
V
OUT
OUT
1
IN
OUT
OUT
OUT
OUT
LOAD CURRENT (mA)
= 2.5V
), 550kHz, Synchronous
), 4MHz, Synchronous
), 550kHz, Synchronous
), 1.4MHz, Synchronous
), 1.5MHz, Synchronous
), 1.5MHz, Synchronous
OUT
V
IN
10
2.5V TO
), 2.25MHz, Synchronous
= 3.6V
U
4.2V
V
IN
IN
V
, Synchronous
*TDK VLF3012AT-4R7MR74
IN
●
= 4.2V
100
™
www.linear.com
C
4.7µF
CERAMIC
IN
3549 TA03b
1000
RUN
V
MODE
IN
COMMENTS
96% Effi ciency, V
MS8 Package
95% Effi ciency, V
16-Lead TSSOP
V
I
V
I
96% Effi ciency, V
MS8 Package
95% Effi ciency, V
ThinSOT
96% Effi ciency, V
ThinSOT Package
95% Effi ciency, V
10-Lead MSE Package
95% Effi ciency, V
DFN Package
96% Effi ciency, V
SC70 Package
95% Effi ciency, V
10-Lead MS Package
SD
SD
LTC3549
IN
IN
GND
: 0.9V to 10V, V
: 0.9V to 5.5V, V
< 3µA, V
< 1µA, V
V
SW
FB
™
3549 TA03a
Package
OUT
OUT
= ADJ, DFN/MS8 Packages
= ADJ, DFN Package
R2
137k
L1, 4.7µH*
IN
IN
IN
IN
IN
IN
IN
IN
IN
CL, 22pF
R1, 267k
OUT(MIN)
: 2.7V to 6V, V
: 2.7V to 10V, V
: 2.7V to 6V, V
: 2.5V to 5.5V, V
: 2.5V to 5.5V, V
: 2.5V to 5.5V, V
: 1.6V to 5.5V, V
: 2.5V to 5.5V, V
: 2.5V to 5.5V, V
OUT(MIN)
AC COUPLED
100mV/DIV
200mA/DIV
200mA/DIV
I
V
LOAD
= 0.20V, Dropout Voltage = 0.15V, I
= 0.40V, Dropout Voltage = 0.05V, I
OUT
I
L
V
V
I
LOAD
IN
OUT
OUT(MIN)
OUT(MIN)
OUT(MIN)
= 3.6V
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
= 1.8V
= 100mA to 250mA
C
4.7µF
CERAMIC
OUT
Load Step Response
= 0.8V, I
= 0.8V, I
= 0.8V, I
V
1.8V
= 0.8V, I
= 0.6V, I
= 0.6V, I
= 0.6V, I
= 0.8V, I
= 0.8V, I
OUT
© LINEAR TECHNOLOGY CORPORATION 2005
20µs/DIV
Q
Q
Q
= 10µA, I
= 10µA, I
Q
Q
Q
Q
Q
Q
= 15µA, I
= 20µA, I
= 20µA, I
= 40µA, I
= 65µA, I
= 26µA/200µA, I
= 60µA, I
SD
SD
LT 0706 • PRINTED IN USA
Q
SD
Q
SD
SD
SD
SD
SD
< 1µA,
= 120µA,
< 1µA,
3549 TA03c
= 54µA,
< 1µA,
< 1µA,
< 1µA,
< 1µA,
< 1µA,
< 1µA,
SD
< 1µA,
3549f