Advertisement
Quick Links
DESCRIPTION
Demonstration circuit 1999A is a fixed frequency syn-
chronous buck-boost converter with an extended input
and output range. The unique 4-switch, single inductor
architecture provides low noise and seamless operation
from input voltages above, below, or equal to the output
voltage.
The
LTC
3111
features selectable PWM or Burst Mode
®
operation, and an easily synchronizable oscillator. Jumper
JP1 is provided to enable the converter. The demo board
is configured for 800kHz. A jumper, JP2, is provided to
select PWM, or Burst Mode operation. A clock signal can
also be applied to JP2 if synchronization is desired.
The LTC3111 operates with a 2.5V to 15V input voltage
range and a V
range from 2.5V to 15V. The demon-
OUT
stration board has been designed to operate with V
from 2.5V to 15V and an output current up to 1.5A. For
V
< 5V, I
capability is reduced. V
IN
OUT
PERFORMANCE SUMMARY
Specifications are at T
= 25°C
A
INPUT VOLTAGE RANGE
V
OUT
I
OUT
Buck-Boost DC/DC Converter
Typical demo board efficiency is shown in Figure 2 for
several loads. The demo board has the provision to set an
accurate run threshold. Consult the LTC3111data sheet for
more information. The transient response of the converter
to a 100mA to 600mA transient at input voltages of 3.5V
and 12V are presented in Figures 3 and 4.
The LTC3111 data sheet has detailed information about
®
the operation, specifications, and applications of the part.
The data sheet should be read in conjunction with this
Quick Start Guide.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
IN
is set to 5.0V.
OUT
2.5V to 15V
5V
1.5A for V
> 5V
IN
DEMO MANUAL DC1999A
15V, 1.5A Synchronous
LTC3111EDHD
dc1999af
1
Advertisement
Subscribe to Our Youtube Channel
Related Manuals for Linear Technology DC1999A
Summary of Contents for Linear Technology DC1999A
- Page 1 JP2 if synchronization is desired. http://www.linear.com/demo The LTC3111 operates with a 2.5V to 15V input voltage L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks range and a V range from 2.5V to 15V. The demon- of Linear Technology Corporation.
- Page 2 DEMO MANUAL DC1999A QUICK START PROCEDURE Using short twisted-pair leads for any power connections 3. Connect the load to VOUT as shown in Figure 1. Again, and with all loads and power supplies off, refer to Figure 1 connect an ammeter if accurate current measurement for the proper measurement and equipment setup.
-
Page 3: Quick Start Procedure
DEMO MANUAL DC1999A QUICK START PROCEDURE Figure 2. Typical Efficiency as a Function of Input Voltage and Load Current Figure 3. Typical Transient Load Response for a Figure 4. Typical Transient Load Response for a 100mA to 600mA Transient Load V = 3.5V... -
Page 4: Parts List
DEMO MANUAL DC1999A PARTS LIST ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CAP CER 47µF 16V 20% X5R 1210 MURATA, GRM32ER61C476ME15L C3, C10, C12 CAP CER 1µF 16V 10% X5R 0603 MURATA, GRM188R61C105KA93D C4, C5 CAP CER 0.1µF 16V 10% X7R 0402... -
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.
- Page 7 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc. DC1999A...
Need help?
Do you have a question about the DC1999A and is the answer not in the manual?
Questions and answers