Rainbow-electronics MAX1855 Manuale Utente Scaricare il pdf (Pagina 31)

MAX1716/MAX1854/MAX1855

High-Speed, Adjustable, Synchronous Step-Down

Controllers with Integrated Voltage Positioning

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OUT

(4) 220µF

0.68µH

1.0V OUTPUT

UP TO 12A

SHDN

VGATE

1µF

0.1µF

1µF

10Ω

(4) 10µF

BATTERY (V

BATT

)

7V TO 24V

REF

ILIM

+5V INPUT

BIAS SUPPLY

POWER-GOOD

INDICATOR

V+

BST

PGND

VPS

TON

MAX1716

MAX1854

MAX1855

SKIP

GND

100kΩ

TO V

100kΩ

300kΩ

47pF

0.22µF

ON OFF

2kΩ

REF (400kHz)

1kΩ

SENSE

3.5mΩ

Q1: IRF7811

INTERNATIONAL RECTIFIER

Q2: (2) IRF7811

INTERNATIONAL RECTIFIER

D1: CMPSH-3

CENTRAL SEMICONDUCTOR

D2: CMSH2-60

CENTRAL SEMICONDUCTOR

MAX1716 DAC CODE SHOWN

Figure 12. Low-Voltage Application (Circuit #3)

1 2 ... 26 27 28 29 30 31 32 33

MAX1716/MAX1854/MAX1855 1

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Rainbow-electronics MAX1855 Manuale Utente Pagina 31

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