ADP3041 Analog Devices, ADP3041 Datasheet - Page 14

• Manufacturer Part Number: ADP3041
• Description: TFT LCD Panel Power Module
• Manufacturer: Analog Devices

ADP3041
the high frequency gain. Increasing C
tion zero frequency, which increases the stability but slows the
transient response.
Shutdown
The ADP3041 shuts down to reduce the supply current to a 10 µA
maximum when the shutdown pin is pulled low. In this mode,
the internal reference, error amplifier, comparator, biasing cir-
cuitry, and the internal MOSFET switch are turned off. Note
that the output is still connected to the input via the inductor
and Schottky diode when in shutdown.
Layout Procedure
To get high efficiency, good regulation, and stability, a good
printed circuit board layout is required. It is strongly recom-
mended that the evaluation board layout be followed as closely
C
decreases the compensa-
–14–
as possible. Use the following general guidelines when designing
printed circuit boards (see Figure 1):
1. Keep C
2. Keep the high current path from C
3. Similarly, keep the high current path from C
4. Keep high current traces as short and wide as possible.
5. Place the feedback resistors as close to the FB pin as possible
6. Place the compensation components as close to the COMP
7. Avoid routing noise sensitive traces near the high current
pin and PGND pin as short as possible.
D1, and C
to prevent noise pickup.
pin as possible.
traces and components.
IN
close to the IN pin of the ADP3041.
OUT
as short as possible.
IN
through L1 to the SW
IN
through L1,
REV. D