Advertisement
Quick Links
Description
Demonstration circuit 2105A is a 500mA output DC/DC
power supply. There are two versions: DC2105A-A is a
board featuring
LTC
3630A, with 4V to 76V input range;
®
DC2105A-B is a board featuring LTC3630, with 4V to 65V
input range. The LTC3630A/LTC3630 operates in a high
efficiency Burst Mode
operation and includes internal
®
high and low side switches. The board provides jumper
selected output voltages of 1.8V, 3.3V, 5V and an option
for additional voltages. LTC3630A/LTC3630 has internal
soft-start and a provision for increasing soft-start time.
Included on the board is an ON/OFF jumper that can also
be configured as a precision undervoltage lockout. Ad-
ditional PC pads are included for programming current
limit to optimize efficiency and for reducing output voltage
performance summary
PARAMETER
Input Voltage Range for DC2105A-A
Input Voltage Range for DC2105A-B
1.8V Output
3.3V Output
5V Output
Maximum Output Current
Typical Output Voltage Ripple
DEMO MANUAL DC2105A
LTC3630AEMSE/LTC3630EMSE
High Efficiency High Voltage 500mA
Synchronous Step-Down Converter
ripple and reducing component size. A terminal (FBO)
is available to allow multiple boards to be paralleled for
increasing output current.
Output voltage between 800mV and V
grammed using optional resistors, although higher voltage
output capacitors will be required.
The LTC3630A/LTC3630 data sheet gives a complete de-
scription 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/DC2105A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Specifications are at T
CONDITION
LTC3630A
LTC3630
V
= 20V, V
Load = 100mA
IN
OUT
V
= 20V, V
Load = 100mA
IN
OUT
V
= 20V, V
Load = 100mA
IN
OUT
V
= 20V, V
= 5V
IN
OUT
V
= 20V, V
= 5V
IN
OUT
= 25°C
A
can be pro-
IN
VALUE
4V to 76V
4V to 65V
1.8V ±2%
3.3 V ±2%
5V ±2%
500mA
75mV
P-P
dc2105af
1
Advertisement
Related Manuals for Linear Technology DC2105A-A
Summary of Contents for Linear Technology DC2105A-A
- Page 1 PC pads are included for programming current limit to optimize efficiency and for reducing output voltage L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
-
Page 2: Quick Start Procedure
DEMO MANUAL DC2105A Quick start proceDure This DC2105A can be evaluated using the setup shown 5. Once the proper output voltages are established, adjust in Figure 1. the load and input voltage within the operating range and observe the output voltage regulation, ripple volt- 1. - Page 3 DEMO MANUAL DC2105A Quick start proceDure Circuit Options LTC3630A/LTC3630 data sheet, leave open for maximum load current. R3 and R4 can be used to set input current Detailed information is contained in the data sheet. limit. C3 is used to reduce output voltage ripple and op- Optional Output Voltage: Additional output voltages can timize efficiency.
-
Page 4: Parts List
DEMO MANUAL DC2105A parts List DC2105A-A ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CAP, 0805 220nF 10% 100V X7R MURATA GRM21AR72A224KAC5L CAP, 2220 4.7µF 20% 100V X7R TDK C5750X7R2A475M CAP, 0603 220pF 10% 50V X7R AVX 06035C221KAT2A CAP, 0603 47nF 10% 25V X7R... - Page 5 DEMO MANUAL DC2105A parts List DC2105A-B ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CAP, 0805 220nF 10% 100V X7R MURATA GRM21AR72A224KAC5L CAP, 2220 4.7µF 20% 100V X7R TDK C5750X7R2A475M CAP, 0603 220pF 10% 50V X7R AVX 06035C221KAT2A CAP, 0603 47nF 10% 25V X7R AVX 06033C473KAT C6, C7 CAP, 1210 100µF 20% 10V X5R...
- Page 6 DEMO MANUAL DC2105A schematic Diagram dc2105af...
-
Page 7: 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 8 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.
Need help?
Do you have a question about the DC2105A-A and is the answer not in the manual?
Questions and answers