TYPICAL APPLICATIONS
APPLICATION INFORMATION
TYPICAL APPLICATIONS
APPLICATION INFORMATION
Depending on the load transient current, a larger capacitance
may be required.
INPUT CAPACITOR
The input capacitor is used to minimize the input voltage
transient that may cause instability when the load transient
current is high. Typically a 4.7µF X5R ceramic capacitor is
sufficient for most applications.
INDUCTOR SELECTION
A 4.7µH low DC resistance inductor is typically used for
the 34727 to guarantee the system stable operation.
OUTPUT CAPACITOR
For stable operation and low output voltage ripple, an X5R
ceramic capacitor of 4.7µF minimum value is needed.
TYPICAL APPLICATIONS
connects to the output directly for monitoring the output
voltage. Normally, the EN pin connects to the input supply
directly to enable the regulator.
1.8V OUTPUT DC/DC CONVERTOR
Figure 16 shows a typical application using 34727B. CIN
and COUT are typically 4.7µF/X5R ceramic capacitors. L1 is
typically a 4.7µH low DC resistance inductor. The FB
34727B
L1
2.7V ~ 5.5V
1.8V
600mA
VIN
EN
SW
4.7µH
CIN
4.7µF
FB
COUT
4.7µF
ON
OFF
GND
Figure 16. 1.8V/600mA DC/DC convertor
MC34727
Analog Integrated Circuit Device Data
Freescale Semiconductor
14
FREESCALE [ Freescale ]
