tb7107fn TOSHIBA Semiconductor CORPORATION, tb7107fn Datasheet - Page 5

• Manufacturer Part Number: tb7107fn
• Description: Buck Dc-dc Converter Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Application Circuit Example
Figure 1 shows a typical application circuit using a low-ESR electrolytic or ceramic capacitor for C
Component values (reference value@ V
C
Examples of Component Values (For Reference Only)
Component values need to be adjusted, depending on the TB7107FN’s I/O conditions and the board layout.
SS
Output Voltage
C
C
R
R
C
R
L: Inductor = 10 μH (SLF10165T-100M3R83PF or SLF7055T-100M2R5-3PF manufactured by
SBD: Schottky barrier diode CMS02 or CRS15 (manufactured by Toshiba Corporation)
C
is a capacitor for adjusting the soft-start time.
Setting
1.51 V
V
1.2 V
1.8 V
2.5 V
3.3 V
5.0V
IN
OUT
FB1
FB2
P
P
BOOT
V
EN
OUT
GND
: Phase compensation capacitance
: Phase compensation resistance
TDK-EPC Corporation)
IN
: Input filter capacitor = 10 μF
=4.5 V to 20 V
: Output voltage setting resistor = 7.5 kΩ
: Output voltage setting resistor = 2.4 kΩ
(ceramic capacitor: GRM31CR71E106K manufactured by Murata Manufacturing Co., Ltd.)
: Output filter capacitor = 10 μF
C
: Bootstrap capacitor = 0.1 μF (GRM188R71H104J manufactured by Murata Manufacturing Co., Ltd.)
(ceramic capacitor: GRM31CR71E106K manufactured by Murata Manufacturing Co., Ltd.)
IN
Inductance
10 μH
10 μH
10 μH
10 μH
10 μH
10 μH
L
R
C
P
P
COMP
Figure 1 TB7107FN Application Circuit Example
Capacitance
SS
EN
10 μF
10 μF
10 μF
10 μF
10 μF
10 μF
Input
C
IN
C
SS
IN
Capacitance
TB7107FN
= 12 V, V
Output
C
20 μF
20 μF
20 μF
20 μF
20 μF
20 μF
OUT
V
IN
GND
OUT
BOOT
Feedback
5
Resistor
= 3.3 V, Ta = 25°C)
7.5 kΩ
5.1 kΩ
7.5 kΩ
16 kΩ
15 kΩ
27 kΩ
R
C
FB1
BOOT
V
L
FB
SBD
X
Feedback
Resistor
2.4 kΩ
2.4 kΩ
5.1 kΩ
15 kΩ
18 kΩ
12 kΩ
R
FB2
L
R
R
FB1
FB2
Compensation
Capacitance
4700 pF
4700 pF
2200 pF
2200 pF
2200 pF
2200 pF
Phase
C
P
TB7107FN
OUT
2010-03-23
Compensation
Resistance
C
.
Phase
10 kΩ
10 kΩ
15 kΩ
22 kΩ
22 kΩ
33 kΩ
OUT
R
P
V
GND
OUT