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DESCRIPTION
Demonstration circuit 2341A is a high efficiency syn-
chronous buck DC/DC converter with 4.5V to 20V input
range. It can supply 20A maximum load current at 1.5V
output. The demo board features the
No external MOSFETs are required. It employs an LTC
proprietary current sensing, current mode architecture,
allowing the use of a very low DC resistance (DCR) power
inductor to maximize efficiency in high current applica-
tions. Differential output voltage sensing along with a
precision internal reference combine to offer accurate
output regulation. The LTC7130 is housed in a 6.25mm
× 7.5mm × 2.22mm 63-pin BGA package.
The light load operation mode of the converter is deter-
mined with the MODE/PLLIN pin. Use the JP2 jumper to
select pulse-skipping mode (P .S.), Burst Mode
PERFORMANCE SUMMARY
PARAMETER
Input Voltage Range
Output Voltage
Maximum Output Current
Typical Switching Frequency
Typical Efficiency
Typical Output Voltage Ripple
20V 20A Monolithic Buck Converter
with Ultra-Low DCR Sensing
or forced continuous mode (CCM) operation. The converter
can also be externally synchronized through the MODE/
PLLIN pin (MODE/PLLIN terminal on the board; JP2: no
LTC
7130
regulator.
jumper or BURST position). To shut down the converter,
®
one simple way is to force the RUN pin below 1.1V (JP1:
OFF). The power good output (PGOOD terminal) is low
when the output voltage is outside of the ±10% regula-
tion window.
The LTC7130 data sheet gives a complete description of
the operation and application information. The data sheet
must be read in conjunction with this demo manual.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2341A
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
(BURST)
®
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
Specifications are at T
CONDITIONS
V
= 4.5V to 20V, I
IN
V
= 4.5V to 20V, V
IN
V
= 12V, I
= 20A
IN
OUT
V
= 12V, I
= 20A
IN
OUT
DEMO MANUAL DC2341A
= 25°C
A
= 0A to 20A
OUT
= 1.5V
OUT
LTC7130EY
MIN
TYP
MAX
UNITS
4.5
20
1.5 ±2%
20
530
89.2
25
mV
dc2341af
V
V
A
kHz
%
P-P
1
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Related Manuals for Linear Technology DC2341A
Summary of Contents for Linear Technology DC2341A
- Page 1 The light load operation mode of the converter is deter- http://www.linear.com/demo/DC2341A mined with the MODE/PLLIN pin. Use the JP2 jumper to L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks select pulse-skipping mode (P .S.), Burst Mode (BURST) ®...
- Page 2 DEMO MANUAL DC2341A QUICK START PROCEDURE Demonstration circuit 2341A is easy to set up to evaluate 5. Once the proper output voltages are established, adjust the performance of the LTC7130. Refer to Figure 1 for the loads within the operating range and observe the...
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Page 3: Quick Start Procedure
DEMO MANUAL DC2341A QUICK START PROCEDURE – Figure 2. Measuring Output Voltage Ripple 4.5V LOAD CURRENT (A) dc2341a F03 Figure 3. Efficiency vs Load Current (V = 1.5V, Burst Mode) 50mV/DIV AC-COUPLED 10A LOAD STEP 5A/DIV TOTAL I : 10A TO/... -
Page 4: Parts List
DEMO MANUAL DC2341A PARTS LIST ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CIN1 CAP , ALUM ELEC180µF 20% 25V PANASONIC., 25SVPF180M CIN4, CIN5 CAP , 1210 22µF 20% 25V X5R AVX, 12103D226MAT2A CIN6 CAP , 1206 10µF 20% 25V X5R... -
Page 5: Schematic Diagram
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. - Page 6 Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods.
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