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MCP1601 Datasheet(PDF) 14 Page - Microchip Technology

Part # MCP1601
Description  500 mA Synchronous BUCK Regulator
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP1601 Datasheet(HTML) 14 Page - Microchip Technology

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MCP1601
DS21762B-page 14
 2003-2013 Microchip Technology Inc.
DC resistance is another common inductor specifica-
tion. The MCP1601 will work properly with inductor DC
resistance down to 0
. The trade-off in selecting an
inductor with low DC resistance is size and cost. To
lower the resistance, larger wire is used to wind the
inductor. The switch resistance in the MCP1601 is
approximately 0.5
. Inductors with DC resistance
lower than 0.1
 will not have a significant impact on the
efficiency of the converter.
5.3
L and COUT Combinations
When selecting the L-COUT output filter components,
the inductor value range is limited from 10 µH to 22 µH.
However, when using the larger inductor values, larger
capacitor values should be used. The following table
lists the recommended combinations of L and COUT.
TABLE 5-1:
L-COUT COMBINATIONS
5.4
Passive Component Suppliers
TABLE 5-2:
CERAMIC CAPACITOR
SUPPLIERS
TABLE 5-3:
ELECTROLYTIC CAPACITOR
SUPPLIERS
LCOUT
10 µH
10 µF to 47 µF
15 µH
15 µF to 47 µF
22 µH
22µF to 47 µF
Note:
For proper PFM mode operation, the value
of the external inductor and the external
capacitor should be the same. For exam-
ple, when using a 10 µH inductor, a 10 µF
capacitor should be used. When using a
22 µH inductor, a 22 µF capacitor should
be used.
Supplier
Type
Description
Murata®
Ceramic 10 µF 0805 X5R 6.3V
#GRM21BR60J106K
Murata®
Ceramic 10 µF 1206 X5R 6.3V
#GRM319R60J106K
Taiyo
Yuden™
Ceramic 10 µF 1210 X5R 6.3V
JMK325BJ106MD
AVX™
Ceramic 10 µF 0805 X5R 6.3V
#08056D106MAT4A
AVX™
Ceramic 10 µF 1206 X5R 6.3V
#12066D106MAT4A
Kemet®
Ceramic 10 µf 1210 6.3V
#C1210C106M9PAC
Murata®
Ceramic 22 µF 1206 X5R 6.3V
GRM31CR60J226ME20B
Taiyo
Yuden™
Ceramic 22 µF 1210 X5R 6.3V
JMK325BJ226MY
Note:
Taiyo Yuden 1210 is a low profile case
(1.15 mm)
Supplier
Type
Description
Kemet®
Tantalum 47 µF D Case 200 M
10V
#T495D476M010AS
AVX™
Tantalum 47 µF C Case 300 M
 6.3V
#TPSC476M006S300
Sprague®
Tantalum 47 µF C Case 110 M
 16V
594D47X0016C2T
Sprague®
Tantalum 22 µF B Case 380 M
 6.3V
594D226X06R3B2T
Sprague®
Tantalum 15 µF B Case 500 M
 10V
594D156X0010B2T


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