5V-to-3.3V, Synchronous, Step-Down

Power-Supply Controller

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7

Part

1.5A Circuit

3A Circuit

5A Circuit

7A Circuit

10A Circuit

L1

10µH

Sumida CDR74B-100

5µH

Sumida CDR125

DRG# 4722-JPS-001

3.3µH

CoilCraft

DO3316-332

2.1µH, 5m

Ω

Coiltronics

CTX03-12338-1

1.5µH, 3.5m

Ω

Coiltronics

CTX03-12357-1

R1

0.04

Ω

IRC LR2010-01-R040

or DD WSL-2512-R040

0.02

Ω

IRC LR2010-01-R020

or DD WSL-2512-R020

0.012

Ω

DD WSL-2512-R012

or 2 x 0.025

Ω

IRC LR2010-01-R025

(in parallel)

3 x 0.025

Ω

IRC LR2010-01-R025

or DD WSL-2512-R025

(in parallel)

3 x 0.020

Ω

IRC LR2010-01-R020

or 2 x 0.012

Ω

DD WSL-2512-R012

(in parallel)

N1,

N2

International

Rectifier IRF7101,

Siliconix Si9936DY

or Motorola

MMDF3N03HD

(dual N-channel)

Siliconix Si9410DY,

International

Rectifier IRF7101

or Motorola

MMDF3N03HD

(both FETs in parallel)

Motorola

MTD20N03HDL

Motorola

MTD75N03HDL

(N1)

MTD20N03HDL

(N2)

Motorola

MTD75N03HDL

C1

47µF, 20V

AVX TPSD476K020R

2 x 47µF, 20V

AVX TPSD476K020R

220µF, 10V

Sanyo

OS-CON 10SA220M

2 x 100µF, 10V

Sanyo

OS-CON 10SA100M

2 x 220µF, 10V

Sanyo

OS-CON 10SA220M

C2

220µF, 6.3V

Sprague

595D227X06R3D2B

2 x 150µF, 10V

Sprague

595D157X0010D7T

2 x 220µF, 10V

Sanyo

OS-CON 10SA220M

2 x 220µF, 10V

Sanyo

OS-CON 10SA220M

4 x 220µF, 10V

Sanyo

OS-CON 10SA220M

D2

1N5817

Nihon EC10QS02,

or Motorola

MBRS120T3

1N5817

Nihon EC10QS02,

or Motorola

MBRS120T3

1N5820

Nihon NSQ03A02,

or Motorola

MBRS340T3

1N5820

Nihon NSQ03A02,

or Motorola

MBRS340T3

1N5820

Nihon NSQ03A02,

or Motorola

MBRS340T3

Temp.

Range

to +85°C

to +85°C

to +85°C

to +85°C

to +85°C

Table 1. Component Values

Table 2. Component Suppliers

Company

Factory Fax [Country Code] USA Telephone

AVX

[1] (207) 283-1941

(800) 282-4975

CoilCraft

[1] (708) 639-1469

(708) 639-6400

Coiltronics

[1] (407) 241-9339

(407) 241-7876

DD

[1] (402) 563-6418

(402) 563-6582

IRC

[1] (512) 992-3377

(512) 992-7900

International

Rectifier

[1] (310) 322-3332

(310) 322-3331

Nihon

[81] 3-3494-7414

(805) 867-2555

Sanyo

[81] 7-2070-1174

(619) 661-6835

Siliconix

[1] (408) 970-3950

(408) 988-8000

Sprague

[1] (603) 224-1430

(603) 224-1961

Sumida

[81] 3-3607-5144

(708) 956-0666

Motorola

[1] (602) 244 4015

(602) 244- 3576