MP1542DK-Z(2006) データシートの表示（PDF） - Monolithic Power Systems
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MP1542DK-Z Datasheet PDF : 10 Pages
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MP1542 – 700KHz/1.3MHz BOOST CONVERTER WITH A 2A SWITCH
AMLCD Application
Figure 3 shows a power supply for active matrix
(TFT-LCD) flat-panel displays. The positive and
negative charge pump outputs are configured
with discrete components. Adjust the output
capacitance and compensation component
values as necessary to meet transient
performance.
Layout Consideration
High frequency switching regulators require very
careful layout for stable operation and low
noise. All components must be placed as close to
the IC as possible. Keep the path between the
SW pin, output diode, output capacitor and GND
pin extremely short for minimal noise and ringing.
The input capacitor must be placed close to the
IN pin for best decoupling. All feedback
components must be kept close to the FB pin to
prevent noise injection on the FB pin trace. The
ground return of the input and output capacitors
should be tied close to the GND pin. See the
MP1542 demo board layout for reference.
TYPICAL APPLICATION
VIN
5V
OFF ON
D1
6
5
7
IN
FSEL
SW
2
FB
3
EN
MP1542
8
SS
1
COMP
GND
C4
10nF
4
C3
2.2nF
VOUT
12V
Figure 2—Typical Application Circuit
VOUT3
26V
5mA
D2
D3
D4
VOUT2
-9V
10mA
VIN
3.0V to 3.6V
OFF ON
D1
6
5
7
IN
FSEL
SW
2
FB
3
EN
MP1542
8 SS
1
COMP
GND
C4
22nF
4
C3
2.2nF
VOUT1
9V
150mA
Figure 3—Multiple-Output, Low-Profile (1.2mm max) TFT LCD Power Supply
MP1542 Rev. 1.3
www.MonolithicPower.com
9
9/7/2006
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© 2006 MPS. All Rights Reserved.
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