TLE4275-Q1_15 Datasheet, PDF (15/28 Pages) Texas Instruments – TLE4275-Q1 5-V Low-Dropout Voltage Regulator

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TLE4275-Q1
SLVS647I – AUGUST 2006 – REVISED NOVEMBER 2014
11 Power Supply Recommendations
The device is designed to operate from an input voltage supply range between 4 V and 40 V. This input supply
must be well regulated. If the input supply is located more than a few inches from the TLE4275-Q1 device, an
electrolytic capacitor with a value of 47 µF and a ceramic bypass capacitor are recommended to add at the input.
12 Layout
12.1 Layout Guidelines
• Do not place any of the capacitors on the opposite side of the PCB from where the regulator is installed. The
use of vias and long traces is strongly discouraged because of the negative impact on system performance.
Vias and long traces can also cause instability.
• Equivalent series inductance (ESL) and ESR must be minimized in order to maximize performance and
ensure stability. Every capacitor must be placed as close to the device as possible and on the same side of
the PCB as the regulator.
12.2 Layout Example
Connect through bottom
layer
Power Ground
Output filter
capacitor, place
close to chip Vout
RESET
NC
DELAY
OUT
NC
NC
NC
GND
NC
NC
NC
IN
Vin
NC
NC
NC
NC
Input bypass
capacitor
NC
NC
Power Ground
NC
NC
Figure 22. TLE4275-Q1 HTSSOP Layout Design Example
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