DC1379A Linear Technology, DC1379A Datasheet

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DC1379A

Manufacturer Part Number
DC1379A
Description
BOARD EVAL LTM8025
Manufacturer
Linear Technology
Series
µModuler
Datasheets

Specifications of DC1379A

Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Voltage - Output
3.3V
Current - Output
3A
Voltage - Input
5.5 V ~ 36 V
Regulator Topology
Buck
Frequency - Switching
250kHz ~ 2MHz
Board Type
Fully Populated
Utilized Ic / Part
LTM8025
Lead Free Status / RoHS Status
Not applicable / Not applicable
Power - Output
-
DESCRIPTION
Demonstration circuit 1379A is a step-down DC/DC switch-
ing regulator featuring the LTM
The demo board is designed to deliver a 3.3V output from
a 5.5V to 36V input. The wide input range of the LTM8025
allows a variety of input sources such as automotive bat-
teries, wall adaptors and industrial supplies. The modes
of operation (Burst Mode
are jumper-selectable. Burst Mode operation improves ef-
ficiency at light loads. The LTM8025 can be synchronized
over a 250kHz to 2MHz range.
The current mode control scheme creates fast transient
response and good loop stability. The RUN/SS pin can
be used to set the part in micropower shutdown mode,
PERFORMANCE SUMMARY
PARAMETER
Input Voltage Range
Output Voltage V
Maximum Output Current
Typical Switching Frequency
BOARD PHOTO
OUT
®
operation or synchronization)
VALUE
5.5V to 36V
3.3V ±5%
3A
750kHz
®
8025 µModule
®
regulator.
(T
A
= 25°C)
reducing the supply current to less than 1µA. The RUN/SS
pin can also be used to program soft-start. In this mode,
the RUN/SS pin is driven through an external RC filter to
create a voltage ramp on this pin reducing the input cur-
rent surge during start-up.
The LTM8025 data sheet gives a complete description
of the part, operation and applications information. The
data sheet must be read in conjunction with this manual
prior to working on or modifying demo circuit 1379A.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Linear Technology, Burst Mode, µModule and the Linear logo are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
DEMO MANUAL DC1379A
µModule Regulator
36V, 3A Step-Down
LTM8025EV
dc1379af
1

Related parts for DC1379A

DC1379A Summary of contents

Page 1

... OUT Maximum Output Current 3A Typical Switching Frequency 750kHz BOARD PHOTO DEMO MANUAL DC1379A 36V, 3A Step-Down µModule Regulator reducing the supply current to less than 1µA. The RUN/SS regulator. pin can also be used to program soft-start. In this mode, ® the RUN/SS pin is driven through an external RC filter to create a voltage ramp on this pin reducing the input cur- rent surge during start-up ...

Page 2

... GND terminals. See Figure 2 for the proper OUT scope probe technique. 1. Place JP1 on the ON position. 2. Preset the power supply within the input voltage range of DC1379A. With power off, connect the input power supply to V and GND Turn on the power at the input. ...

Page 3

... QUICK START PROCEDURE + – – – DEMO MANUAL DC1379A Figure 1. Proper Measurement Equipment Set-Up V GND OUT DC1379 F02 Figure 2. Measuring Input or Output Ripple + – LOAD – – DC1379 F01 dc1379af 3 ...

Page 4

... DEMO MANUAL DC1379A PARTS LIST ITEM QUANTITY REFERENCE-DESCRIPTION Required Circuit Components R2 Additional Demo Board Circuit Components IN1 2 0 C5, C6 FB1 Hardware for Demo Board Only 1 8 E1, E2, E7 E12 JP1, JP2 4 2 JP1, JP2 Notes: 1. Required Circuit Components are those parts that are required to implement the circuit function. ...

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. DEMO MANUAL DC1379A dc1379af 5 ...

Page 6

... DEMO MANUAL DC1379A 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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