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Description
DC1724A is a µModule
step-down converter, featuring the
®
LTM8029, which consumes only 5µA of quiescent current.
The demo circuit is designed for a 5V, 600mA output at an
operating frequency of 600kHz. The input voltage range
is from 5.6V to 36V. Equipped with an off-time skipping
capability, the LTM8029 can operate at input voltages lower
than other step-down regulators.
The wide input range of the LTM8029 allows a variety of
input sources such as automotive batteries and industrial
supplies. Its current mode control scheme creates fast
transient response and good loop stability. At light loads,
the LTM8029 operates in Burst Mode
high efficiency and low output ripple over a broad current
BoarD photo
operation to maintain
®
DEMO MANUAL DC1724A
36V
, 600mA Step-Down
IN
µModule Converter with
5µA Quiescent Current
range. To provide a programmable undervoltage lockout,
users can remove jumper JP1 and populate R1 and R3
on the RUN pin.
The LTM8029 data sheet gives a complete description of
the part, operation and application information. The data
sheet must be read in conjunction with this demo manual
prior to working on or modifying demo circuit DC1724A.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, µModule, 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.
LTM8029
dc1724af
1
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Summary of Contents for Linear Technology DC1724A
- Page 1 Its current mode control scheme creates fast L, LT, LTC, LTM, µModule, Linear Technology, the Linear logo and Burst Mode are registered transient response and good loop stability. At light loads, trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
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Page 2: Performance Summary
= 5V, I = 600mA) Quick start proceDure DC1724A provides an easy way to evaluate the performance 3. Turn on the power at the input. of the LTM8029. Refer to Figure 2 for proper measurement NOTE: Make sure that the input voltage does not exceed equipment setup and follow the procedure below: 36V. - Page 3 DEMO MANUAL DC1724A Quick start proceDure Figure 2. Proper Measurement Equipment Setup Figure 3. Measuring Input or Output Ripple dc1724af...
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Page 4: Parts List
DEMO MANUAL DC1724A parts List ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CAP ., X7R, 1.0µF , 50V, 10%, 0805 MURATA, GRM21BR71H105KA12L CAP ., X5R, 22µF , 6.3V, 20%, 1206 TDK, C3216X5R0J226M RES., CHIP , 0Ω, 1/16W, 0603 NIC, NRC06ZOTRF RES., CHIP , 316k, 1/10W, 1%, 0603... -
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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