15
dc2048af
DEMO MANUAL DC2048A
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
schematic Diagram
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
OVERVOLTAGE TOLERANT BUFFERS
TRANSLATES THE HIGH PULL-UP
VOLTAGES FROM THE LTC3330 TO THE
VOUT VOLTAGE DRIVING THE
PROCESSOR I/O BUS, WHICH IS VOUT.
LDO_EN LOGIC IS POWERED BY VOUT
(NO BUFFER IS NEEDED)
U2, U3, U4 FUNCTION TABLE
II
I
Y
LL
L
HH
LL
L
0
2
12
21
0
Y= ( I ) ( I ) + ( I ) ( I )
.
.
VOUT
BAT
VOUT
VOUT
VOUT
EH_ON
PGLDO
LDO_EN
PGVOUT
PGVOUT
EH_ON
LDO_EN
PGLDO
VOUT
BAT
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
3
DEMO CIRCUIT 2048A
22
NANOPOWER BUCK - BOOST DC / DC
N/A
LTC3330EUH
NC
JD
5 - 17 - 13
WITH ENERGY HARVESTING BATTERY LIFE EXTENDER
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
3
DEMO CIRCUIT 2048A
22
NANOPOWER BUCK - BOOST DC / DC
N/A
LTC3330EUH
NC
JD
5 - 17 - 13
WITH ENERGY HARVESTING BATTERY LIFE EXTENDER
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
3
DEMO CIRCUIT 2048A
22
NANOPOWER BUCK - BOOST DC / DC
N/A
LTC3330EUH
NC
JD
5 - 17 - 13
WITH ENERGY HARVESTING BATTERY LIFE EXTENDER
U4
NC7SZ58P6X
U4
NC7SZ58P6X
I1
GND
I0
Y
VCC
I2
U3
NC7SZ58P6X
U3
NC7SZ58P6X
I1
GND
I0
Y
VCC
I2
J1
DUST HEADER 2X6
SMH-106-02-L-D-05
J1
DUST HEADER 2X6
SMH-106-02-L-D-05
VSUPPLY
NC
GND
PGOOD
KEY
VBAT
RSVD
EHORBAT
I/O 2
I/O 1
+5V
V+
U2
NC7SZ58P6X
U2
NC7SZ58P6X
I1
GND
I0
Y
VCC
I2
Figure 18. DC2048A Demo Circuit Schematic
