DC506A - Schematic

5
4
3
2
1
D
D
GND
VIN
3
CIN2
1uF 10V
0603
JP1
2
GND
JP2
2
R3
10M
1
GND
CIN1
10uF,6.3V
0805
E3
MD0
GND
R4
10M
U1
C
MD0
MD0
1
VIN
2
C1+
3
C1-
4
C1
1uF 10V
0603
5
MD0
VIN
C1+
C1GND
VIN
1
E2
VIN
3
VIN
3.2V-5.5V
E1
R1
536K
1%
FB
FB 10
MD1
MD1 9
C2+
C2+ 8
VOUT
VOUT 7
C2C2- 6
R2
475K
1%
C
C3
4.7pF
MD1
VOUT
C2
1uF 10V
0603
LTC3251EMSE
COUT1
10uF 6.3V
1206
COUT2
1uF 6.3V
0603
GND
E5
MD1
E6
VOUT=1.5V
IOUT=500mA
*
E7
GND
B
B
DERATES LINEARLY TO 200mA
* IOUT
FOR VIN LESS THAN 3.5V
NOTES: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE INOHMS, 0402.
ALL CAPACITORS ARE IN MICROFARADS, 0402.
2. INSTALL SHUNTS ON JP1 AND JP2 PIN 2AND 3.
3. THE MODES OF OPERATION:
A
CONTRACT NO.
APPROVALS
JP1
JP2
MODE
GND
VIN
GND
VIN
GND
GND
VIN
VIN
SHUTDOWN
BURST
CONTINUOUS
SUPER BURST
DRAWN:
TECHNOLOGY
KIM T.
CHECKED:
TITLE:
SCHEMATIC
SIZE
DWG NO.
APPROVED:
ENGINEER:
RAYMOND Z.
DESIGNER:
4
3
A
500mA SPREAD-SPECTRUM, LOW NOISE,
INDUCTORLESS STEP DOWN DC/DC CONVERTER
A
DATE:
5
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
Friday, August 23, 2002
2
REV
DC506A - LTC3251EMSE
SHEET 1
1
A
OF
1
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