Lo w -Vo lt a g e , P re c is io n S t e p -Do w n
Co n t ro lle r fo r P o rt a b le CP U P o w e r
MAX136
Table 1. Component Selection for Standard Applications
LOAD CURRENT
7A (EV KIT)
COMPONENT
1A
7V to 22V
4A
7V to 22V
3A
3A
6V to 30V
Input Voltage
Range
7V to 22V
4.75V to 30V
Output Voltage
Range
1.8V
1.8V
1.25V to 2V
3.3V
5V
Application
Frequency
CPU I/O
300kHz
CPU Core
300kHz
CPU Core
300kHz
300kHz
300kHz
International Rectifier
IRF7413,
Fairchild NDS8410A,
or Siliconix Si4410DY
International Rectifier International Rectifier
IRF7413, IRF7413,
Fairchild NDS8410A, Fairchild NDS8410A,
or Siliconix Si4410DY or Siliconix Si4410DY
International Rectifier
IRF7403 or
Siliconix Si9804DY
Q1 High-Side
MOSFET
1/2 Si4902DY or
1/2 MMDF3NO3HD
International Rectifier
IRF7413,
Fairchild NDS8410A, Siliconix Si4420DY
or Siliconix Si4410DY
International Rectifier International Rectifier
Q2 Low-Side
MOSFET
1/2 Si4902DY or
1/2 MMDF3NO3HD
Fairchild FDS6680 or IRF7413,
IRF7413,
Fairchild NDS8410A, Fairchild NDS8410A,
or Siliconix Si4410DY or Siliconix Si4410DY
2 x 22µF, 35V
AVX
TPSE226M035R0300 TPSE226M035R0300
2 x 22µF, 35V
AVX
4.7µF, 25V ceramic
Tokin C34Y5U1E475Z Tokin C34Y5U1E106Z Tokin C34Y5U1E106Z
or Marcon/United
Chemicon
THCR40E1E475Z
2 x 10µF, 25V ceramic 4 x 10µF, 25V ceramic
C1 Input
Capacitor
or Marcon/United
Chemicon
or Marcon/United
Chemicon
or
or
Sprague
Sprague
THCR50E1E106ZT
THCR50E1E106ZT
593D226X0035E2W 593D226X0035E2W
4 x 390µF, 6.3V low-
ESR, Sprague
594D397X06R3R2T,
or 4 x 470µF, 4V
Sprague
2 x 470µF,
4V low-ESR
Sprague
220µF, 6.3V tantalum
Sprague
595D227X96R3C2
2x 220µF
C2 Output
Capacitor
2x 220µF
Sprague 594D
Sprague 594D
594D227X0010D2T
594D227X0010D2T
594D477X0004R2T
594D477X0004R2T
0.070Ω, 1% (1206)
Dale
0.015Ω, 1% (2512)
Dale
0.010Ω, 1% (2512)
Dale
0.020Ω, 1% (2010)
Dale
0.020Ω, 1% (2010)
Dale
R1 Resistor
WSL-1206-R070F
WSL-2512-R015F
WSL-2512-R010F
WSL-2010-R020F
WSL-2010-R020F
4.6µH
2.2µH
Panasonic P1F2R0HL,
Sumida
CDRH127-2R4,
Coiltronics
UP4-2R2, or
Coilcraft
Panasonic
ETQP1F4R6H,
Sumida
CDRH127-4R7,
Coiltronics
UP2-4R7, or
Coilcraft
10µH
10µH
Sumida
Sumida
CDRH125-100,
Coiltronics
UP2-100, or
Coilcraft
CDRH125-100,
Coiltronics
UP2-100, or
Coilcraft
15µH
Sumida CD54-150
L1 Inductor
DO3316-103
DO3316-103
DO5022P-222HC
DO3316P-472
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9
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
