MIC2182 Micrel Semiconductor, MIC2182 Datasheet - Page 21

• Manufacturer Part Number: MIC2182
• Description: High-Efficiency Synchronous Buck Controller Final Information
• Manufacturer: Micrel Semiconductor

Predesigned Circuits
A single schematic diagram, shown in Figure 14, can be used
to build power supplies ranging from 3A to 10A at the common
output voltages of 1.8V, 2.5V, 3.3V, and 5V. Components that
vary, depending upon output current and voltage, are listed
in the accompanying Tables 3 through 6.
June 2000
MIC2182
GND
V
IN
(inductors and resistors)
Central Semiconductor
R7
100k
C3
0.1 F
2.2nF
Vishay/Siliconix
Vishay/Lite On
Manufacturer
C2
(MOSFETs)
Vishay/Dale
Coiltronics
Figure 14. Basic Circuit Diagram for Use with Tables 3 through 6
(diodes)
Sumida
Micrel
AVX
IRC
C5
0.1 F
R1
2k
Table 1. Specifications for Figure 14 and Tables 3 through 6
IR
C4
1nF
VIN
EN/UVLO
PWM
SS
COMP
SYNC
M
a
S
MIC2182
i x
SGND
w
S
m
c t i
S
h
u
w
o
PGND
h
m
VOUT
VREF
S
- t r
c t i
VSW
n i
VDD
HSD
CSH
BST
LSD
p
a
i c
g
h
e
Table 2. Component Suppliers
m
n i
c r
c
f
e r
b
g
f i
u
SD103BWS
e i
c i
q
t i
f
Telephone Number (USA)
t n
e r
u
t a
c
e
D2
a
q
C6
0.1 F
C13, 1nF
C1
0.1 F
50V
n
e t
o i
p
u
y c
a
m
e
n
l i b
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
n
p
r
y c
p i
e
y t i
a r
p
C9
4.7 F
16V
e l
u t
21
e r
Power supplies larger than 10A can also be constructed
using the MIC2182 using larger power-handling compo-
nents.
The “Power Supply Operating Characteristics” graphs follow-
ing the component and vendor tables provide useful informa-
tion about the actual performance of some of these circuits.
Q2
(table)
Q1
(table)
C11
(table)
1
%
f o
D1
(table)
C
(table)
o
o
3
L1
t n
i L
u
8 C
0
p t
5
0
n i
m
k
t u
u
H
t i
www.japanlink.com/sumida
o
z
v
u
www.vishaytechno.com
www.vishay-liteon.com
www.centralsemi.com
l o
(table)
s
www.coiltronics.com
R2
a t
www.avxcorp.com
www.siliconix.com
www.micrel.com
g
Web Address
e
www.irf.com
C7
(table)
C12
0.1 F
50V
GND
V
OUT
MIC2182
Micrel