MIC2145BML Micrel Inc, MIC2145BML Datasheet - Page 10

• Manufacturer Part Number: MIC2145BML
• Description: IC BOOST CONV MICROPWR 10-MLF
• Manufacturer: Micrel Inc
• Type: Step-Up (Boost), Flyback, Sepicr

Specifications of MIC2145BML

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: Adj to 16V
• Current - Output: 500mA
• Frequency - Switching: 450kHz
• Voltage - Input: 2.4 ~ 16 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MLF®, QFN
• Power - Output: 2.5W
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

MIC2145
Inductor
The MIC2145 has a programmable peak current to allow the
usage of small surface mount inductors. A 10µH or 4.7µH
inductor is recommended for most portable applications such
as powering white LEDs and biasing LCD panels. The
M9999-042205
Table 3. Typical Application for 4.7
Table 1. Typical Application for 10
V
V
3
N I
(
2
3
3
5
N I
(
) V
) V
0 .
4 .
0 .
6 .
0 .
(
(
m
m
i
i
) n
) n
Basic Configuration
Basic Configuration
V
V
1
1
1
1
1
1
1
1
N I
N I
4
9
4
9
4
9
9
(
4
9
9
9
(
1
4
1
4
1
4
1
4
) V
) V
(
(
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
m
m
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
a
a
) x
) x
R
R
4
1
1
1
1
S
(
S
(
Ω
Ω
) Ω
0
) Ω
0
0
0
0
E
E
0
k
k
k
k
T
T
I
I
O
O
(
(
U
2
U
1
2
1
1
m
m
8
2
2
1
5
4
3
7
5
4
9
8
6
5
( T
( T
5
5
5
9
3
0
5
0
5
0
0
0
0
0
0
0
0
0
0
) A
) A
m
m
0
0
0
0
0
a
a
) x
) x
µ
µ
V
H Inductor in
V
H Inductor in
(
(
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
) V
O
) V
5
O
5
5
5
0
2
5
0
2
5
0
2
5
0
2
5
0
2
5
U
U
T
T
10
inductor should have a saturation current rating higher than
the peak current during circuit operation. A low ESR (Equiva-
lent Series Resistance) inductor is also desirable for high
efficiency. Below are tables that list the maximum output
current at minimum input voltage with efficiencies greater
than 80%.
Table 4. Typical Application for 4.7
Table 2. Typical Application for 10
V
V
3
N I
2
3
3
5
N I
(
(
) V
) V
4 .
0 .
6 .
0 .
(
0 .
(
m
m
i
i
) n
Bootstrap Configuration
) n
Bootstrap Configuration
V
V
1
1
1
1
1
1
1
1
N I
N I
4
9
4
9
4
9
9
(
4
4
4
4
(
1
4
1
4
1
4
1
4
) V
) V
(
(
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
m
m
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
a
a
) x
) x
R
R
2
(
1
1
1
1
S
(
S
Ω
Ω
Ω
) Ω
0
0
0
0
0
E
E
0
k
k
k
k
)
T
T
I
I
O
O
(
(
5
2
1
1
U
1
1
2
1
1
1
3
1
1
1
3
2
2
U
m
m
9
7
( T
( T
0
2
5
3
6
0
5
5
2
0
5
7
5
2
0
5
0
0
0
) A
) A
m
m
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
0
0
a
a
) x
) x
µ
µ
V
H Inductor in
V
H Inductor in
(
(
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
) V
O
) V
5
5
5
O
5
0
2
5
0
2
5
0
2
5
0
2
5
0
2
5
U
U
T
T
Micrel, Inc.
April 2005