Rainbow Electronics MAX1717 User Manual

Page 13

MAX1717

Dynamically Adjustable, Synchronous

Step-Down Controller for Notebook CPUs

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Table 1. Component Selection for Standard Applications

GND

REF

GND

Float

TON Level

(2) International
Rectifier IRF7805,
IRF7811, or
IRF7811A

Low-Side MOSFET
Q2

7V to 24V

Input Range
(V

BATT

)

4.5V to 5.5V

1000kHz, VOLTAGE

POSITIONED,

CIRCUIT 5

0.3µH
Sumida
CEP12D38 4713-
T001

Ω ±1%, 1W

Dale
WSL-2512-R005F

International
Rectifier IRF7811

(4) 10µF, 25V
ceramic
Taiyo Yuden
TMK432BJ106KM

(5) 47µF, 6.3V
ceramic
Taiyo Yuden
JMK432BJ476MM

1000kHz

14A

550kHz, VOLTAGE

POSITIONED,

CIRCUIT 3

0.47µH
Sumida
CEP125-4712-T006

Ω ±1%, 1W

Dale
WSL-2512-R005F

International
Rectifier IRF7811

(4) 10µF, 25V
ceramic
Taiyo Yuden
TMK432BJ106KM

(4) 220µF, 2.5V,
25m

Ω specialty

polymer
Panasonic
EEFUE0E221R

550kHz

14A

300kHz, VOLTAGE

POSITIONED,

CIRCUIT 2

1000kHz, +5V,

CIRCUIT 4

0.19µH
Coilcraft
X8357-A

Ω ±1%, 1W

Dale
WSL-2512-R005F

International
Rectifier IRF7811

(5) 22µF, 10V
ceramic
Taiyo Yuden
LMK432BJ226KM

(5) 47µF, 6.3V
ceramic
Taiyo Yuden
JMK432BJ476MM

1000kHz

14A

24mV

1µH
Sumida
CEP125-1R0MC or
Panasonic
ETQP6F1R1BFA

Inductor
L1

Ω ±1%, 1W

Dale
WSL-2512-R005F

—

Voltage-
Positioning
Resistor R6

24mV

—

Voltage-
Positioning Offset

International
Rectifier IRF7811

High-Side MOSFET
Q1

(4) 10µF, 25V
ceramic
Taiyo Yuden
TMK432BJ106KM

Input Capacitor
C1

(5) 220µF, 2.5V,
25m

Ω specialty

polymer
Panasonic
EEFUE0E221R

(6) 470µF, 6.3V
tantalum
Kemet
T510X477M006AS

Output Capacitor
C2

300kHz

Frequency

COMPONENT

14A

Output Current

Figure Number

300kHz, STANDARD

APPLICATION,

CIRCUIT 1