TLF50241EL_15 Datasheet, PDF (25/30 Pages) Marl International Limited – 2.2 MHz Step-Down Regulator 500 mA, 5 V, low quiescent current

TLF50241EL
Application Information
9
Application Information
Note: The following information is given as a hint for the implementation of the device only and shall not be
regarded as a description or warranty of a certain functionality, condition or quality of the device.
D_IN
L_IN
V_S
CIN1
C_IN2
C_IN3
VS
TLF50241EL
N.C.
Over
Temperature
Shutdown
L_IN, C_IN1 and C_IN3 recommended for
suppression of EME,
D_IN depending on application
FREQ
SYNC
R5
N.C.
N.C.
Buck
Converter
Oscillator
Bandgap
Reference
Soft Start
Ramp
Generator
INT.
SUPPLY
Reset
Generator
SWO
D_CATCH
FB
RTADJ
RO
L_OUT
VCC
C_OUT
R1 R4
To µP
R2
N.C.
GND GND N.C.
Figure 9 Application Diagram
Note: This is a very simplified example of an application circuit. The function must be verified in the real application
Part-No.
C_IN2
C_IN3
C_OUT
D_CATCH
L_OUT
R1
R2
Value
Type
47µF/50V electrolytic
100nF/50V ceramic
10µF/25V ceramic
1A/100V 10BQ100 Schottky
10µH
MSS1278 T
330 kΩ 0.25 W
100 kΩ 0.25 W
Manufacturer
AVX
AVX
AVX
International Rectifier
Coilcraft
Panasonic
Panasonic
-
-
-
-
R4
100 kΩ 0.25 W
R5
43 kΩ
0.25 W
Panasonic
Panasonic
Figure 10 Bill of Material for Application Diagram
Remark
For improving EME
1 A current capability
4.7 µH also possible
V_RT set to 4.3 V
VRT set to 4.3 V
fOSC set to 2.2 MHz
Data Sheet
25
Rev. 1.0, 2013-06-19