DC500A - Schematic

5
3
2
U1*
Vin
2.7V-5.5V
4 Vin
E1
Cin
4.7uF
6.3V
GND
1
E3
D
* Vout
600mA
E2
(max)
2.2uH
Vfb** 5
JP1
2
ON
OFF
1
L1
SW 3
3
D
4
1 RUN
Cout
10uF
6.3V
GND 2
R1
4.7M
Rfb1 *
Cffw *
***
***
GND
C
C
E5
Rfb2 *
***
GND
E4
GND
* VERSION TABLE
Assembly Type
B
E6
U1
DC500A-A
LTC3406ES5
DC500A-B
DC500A-C
LTC3406ES5-1.5
LTC3406ES5-1.8
DC500A-D
LTC3406BES5
DC500A-E
LTC3406BES5-1.5
LTC3406BES5-1.8
DC500A-F
**
Vout
Rfb1
Rfb2
Cffw
ADJ(1.2V)
301K
1.5V
0
301K
___
22pF
___
1.8V
___
___
ADJ(1.2V)
0
301K
1.5V
0
301K
___
22pF
___
1.8V
0
___
___
B
Pin 5 is Vout for the fixed voltage versions of the LTC3406.
CONTRACT NO.
*** For the fixed voltage versions of the DC500A, Rfb1 is a zero ohm
resistor (jumper), and Rfb2 and Cffw are unstuffed.
APPROVALS
DRAWN
June Wu
DATE
2/1/02
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
TITLE
CHECKED
A
A
APPROVED
ENGINEER
LTC3406, High Efficiency, ThinSOT
Tom Gross
DESIGNER
Friday, May 03, 2002
5
4
3
2/1/02
SIZE CAGE CODE
TM
Synchronous Buck Regulator
DWG NO
REV
DC500A
SCALE:
FILENAME:
2
A
SHEET
1
1
OF
1
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