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LM3242TMX/NOPB Datasheet(PDF) 16 Page - Texas Instruments

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Part # LM3242TMX/NOPB
Description  750mA Miniature Adjustable Step-Down DC-DC Converter
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM3242TMX/NOPB Datasheet(HTML) 16 Page - Texas Instruments

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FB
EN
VIN
VCON
SW
VIN
2.7V to 5.5V
0.4V to 3.6V
10 PF
4.7 PF
PGND
0.5 PH
LM3242
VOUT = 2.5 x VCON
BPEN
SGND
DAC
GPO1
LM3242
SNOSB48E – OCTOBER 2011 – REVISED AUGUST 2015
www.ti.com
8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
8.1.1 Setting The Output Voltage
The LM3242 features a pin-controlled adjustable output voltage to eliminate the need for external feedback
resistors. It can be programmed for an output voltage from 0.4 V to 3.6 V by setting the voltage on the VCON
pin, as in Equation 1:
VOUT = 2.5 × VCON
(1)
When VCON is between 0.16 V and 1.44 V, the output voltage will follow proportionally by 2.5 times of VCON.
If VCON is less than 0.16 V (VOUT = 0.4 V), the output voltage may not be well regulated. Refer to Figure 21 for
more detail. This curve exhibits the characteristics of a typical part, and the performance cannot be ensured as
there could be a part-to-part variation for output voltages less than 0.4 V. For VOUT lower than 0.4 V, the
converter might suffer from larger output ripple voltage and higher current limit operation.
8.1.2 FB
Typically the FB pin is connected to VOUT for regulating the output voltage maximum of 3.6 V.
8.2 Typical Application
Figure 23. LM3242 Typical Application
16
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Product Folder Links: LM3242


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