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dc1923af

DEMO MANUAL DC1923A

Description

LTC3129-1

15V, 200mA Synchronous Buck-Boost DC/DC 

Converter with 1.3µA Quiescent Current

Demonstration circuit 1923A features the 

LTC3129-1

, a 

high efficiency 200mA buck-boost DC/DC converter with 

a wide V

IN

 and V

OUT

 range.

The DC1923A demo board has two user selectable operat-

ing modes: Burst Mode

®

 operation and fixed frequency 

PWM (JP3). There is also an accurate programmable RUN 

pin which is used to ENABLE the converter (JP1). The 

LTC3129-1  also  incorporates  a  maximum  power  point 

control function which can be enabled (JP2) for applications 

where the input source is a solar cell or is high imped-

ance, such as intrinsically safe applications or high Z

OUT

 

thermal electric generators (TEGs). The LTC3129-1 also 

features fixed output voltages with eight user-selectable 

settings (JP4, JP5, JP6). This allows the user to eliminate 

the output voltage divider and the associated bias current.
The DC1923A operates with a 2.42V to 15V input voltage 

range, and has been designed with the output voltage set 

to 5V. The demo board can be programmed to any of the 

eight voltage settings by using jumpers JP4, JP5, and JP6.

L

, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, Dust Networks and Dust are 

registered trademarks of Linear Technology Corporation. All other trademarks are the property 

of their respective owners.

Once the converter is started the LTC3129-1 can operate 

with V

IN

 as low as 1.92V provided V

CC

 is back-fed. Consult 

the data sheet for more information on these options.
The DC1923A demo board also incorporates a connector 

(J1) which can be used to connect to a Dust Networks

®

 

mote demo board.
Figure 1 shows typical demo board efficiency and Figure 2 

shows typical step response.
The LTC3129-1 data sheet has detailed information about 

the operation, specification, 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

performance summary

Specifications are at T

A

 = 25°C

PARAMETER

TYPICAL

Input Voltage Range

2.42V to 15V

VOUT

5V; 8 User Selectable Voltages

IOUT (see Note 1)

200mA, for VIN > V

OUT

Efficiency

See Figure 1

Note 1: The demo board output current is a function of VIN. Please refer to the data sheet for more information.

Downloaded from

Arrow.com.

Summary of Contents for DC1923A

Page 1: ...ogrammed to any of the eightvoltagesettingsbyusingjumpersJP4 JP5 andJP6 L LT LTC LTM Linear Technology the Linear logo Burst Mode Dust Networks and Dust are registered trademarks of Linear Technology...

Page 2: ...be Measure the input or output voltage ripple by touching the probe tip directly across the VIN or VOUT and GND terminals see Figure 4 or by using an oscil loscope probe tip jack 1 Jumper PS1 and LOAD...

Page 3: ...the desired voltage See the data sheet section ProgrammingtheMPPCVoltageformoreinformation 13 With no load and the MPPC voltage set increase the sourcevoltageabovetheMPPCsetpoint VOUTshould be in reg...

Page 4: ...igure 3 Proper Measurement Equipment Setup Figure 4 Measuring Input or Output Ripple Figure 5 DC1923A Connected to DC9003A Dust Mote Top View GND VIN Downloaded from Arrow com Downloaded from Arrow co...

Page 5: ...N2F30FHTA 9 3 R1 R2 R4 RES CHIP 2M 1 16W 1 0402 VISHAY CRCW04022M00FKED 10 1 U1 15V 200mA SYNCHRONOUS BUCK BOOST DC DC CONVERTER WITH 1 3 A QUIESCENT CURRENT LINEAR TECHNOLOGY LTC3129EUD 1 Additional...

Page 6: ...ONS ENGINEERING FOR ASSISTANCE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS SCALE NONE www linear com 2 DEMO CIRCUIT 1923A 1 1 CONVERTER...

Page 7: ...PPLIED SPECIFICATIONS HOWEVER IT REMAINS THE CUSTOMER S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIG...

Page 8: ...INDEMNITY NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES The user assumes all responsibility and liability for proper and safe handling of the...

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