TPS61086_15 Datasheet, PDF (16/30 Pages) Texas Instruments – TPS61086 18.5-V PFM – PWM Step-Up DC – DC Converter With 2.0-A Switch

TPS61086
SLVSA05B – AUGUST 2009 – REVISED AUGUST 2015
8.2.2 3.3-V to 12-V Boost Converter With Forced PWM Mode at Light Load
L
3.3 µH
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V_IN
3.3 V ± 20%
Cin
10 µF
16 V
Cby
1 µF
16 V
8
IN
3
EN
SW ⁶
7
SW
9 _MODE
4 _AGND
5 _PGND
2
FB
COMP ¹
SS ¹⁰
TPS61086
D
PMEG2010AEH
V_S
12 V/500 mA max.
R1
156 kΩ
Css
100 nF
R2
18 kΩ
Rcomp
68kΩ
Ccomp
1.2 nF
Cout
10 µF
25 V
Figure 15. Typical Application, 3.3 V to 12 V (Force PWM Mode)
8.2.2.1 Design Requirements
For this example, the design parameters are listed in Table 7.
Table 7. Design Parameters
DESIGN PARAMETERS
Input Voltage
Output Voltage
Output Current
Operation Mode at Light Load
EXAMPLE VALUES
3.3 V ± 20%
12 V
500 mA
Forced PWM
16
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