MIC2145(2003) Просмотр технического описания (PDF) - Micrel
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MIC2145 Datasheet PDF : 15 Pages
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MIC2145
Bootstrap
A bootstrapped configuration is recommended for applica-
tions that require high efficiency at heavy loads (>70mA).
This is achieved by connecting the VDD pin to VOUT (see
Micrel
Figure 7). For applications that require high efficiency at light
loads (<70mA), the VDD pin is connected to the input voltage
(VIN); this is referred to as the basic configuration (see Figure
6).
VIN
3.6V
C1
10µF/6.3V
Murata
GRM42-6 X5R 106K 6.3
R1 R2
100k 10k
L1
10µH
Sumida
CR43-100
VDD
SW
EN
PGND
MIC2145
RSET
FB
SS
C2
0.01µF
SGND
D1
On Semiconductor
MBR0530T1
R4
1M
C3
100pF
R3
274k
Figure 6. Basic Configuration
VOUT
5V/250mA
C4
10µF/6.3V
Murata
GRM42-6 X5R 106K 6.3
VIN
3.6V
C1
10µF/6.3V
Murata
GRM42-6 X5R 106K 6.3
R2
10k
L1
10µH
Sumida
CR43-100
PGND
SW
D1
On Semiconductor
MBR0530T1
SGND
VDD
MIC2145
RSET
SS
EN
R1
FB 100k
C2
0.01µF
C3
100pF
R4
1M
R3
274k
Figure 7. Bootstrap Configuration
VOUT
5V/350mA
C4
10µF/6.3V
Murata
GRM42-6 X5R 106K 6.3
May 2003
9
MIC2145
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