MAX1964 データシートの表示（PDF） - Maxim Integrated

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MAX1964

Tracking/Sequencing Triple/Quintuple Power-Supply Controllers

Maxim Integrated 

Tracking/Sequencing Triple/Quintuple

Power-Supply Controllers

D1

CENTRAL CMPSH-3

C1

1µF

C2

1µF

RPOK

100kΩ

TO LOGIC

IN

BST

DH

VL

LX

ILIM

DL

MAX1964

OUT

FB

POK

GND

RGATE(NH)

10Ω

CBST

0.1µF

RGATE(NL)

10Ω

CIN

470µF

INPUT

9V TO 18V

INTERNATIONAL

NH

RECTIFIER

IRF7101

L1

33µH

NL

COUT

1000µF

R1

30kΩ

VOUT1

5V AT 1A

R2

10kΩ

CCOMP1

470pF

RCOMP

5MΩ

CCOMP2

47pF

COMP

CBE2

2200pF

C3

1µF

RBE2

B2

220Ω

Q1

R3

TIP30 VOUT2

4.64kΩ

1.8V AT 300mA

FB2

R4

10kΩ

C4

10µF

COUT : 1000µF, 10V SANYO (CZ SERIES)

CBE3

1000pF

C5

1µF

RBE3

B3

220Ω

R5

Q2

TIP32

VOUT3

4.99kΩ

3.3V AT 750mA

FB3

R4

3.0kΩ

C6

10µF

POWER GROUND

ANALOG GROUND

Figure 1. MAX1964 Standard Application Circuit

Detailed Description

The MAX1964/MAX1965 power-supply controllers pro-

vide system power for cable and xDSL modems. The

main step-down DC-DC controller operates in a cur-

rent-mode pulse-width-modulation (PWM) control

scheme to ease compensation requirements and pro-

vide excellent load and line transient response.

The MAX1964 includes two analog gain blocks to regu-

late two additional positive auxiliary output voltages,

and the MAX1965 includes four analog gain blocks to

regulate three additional positive and one negative aux-

iliary output voltages. The positive regulator gain blocks

can be used to generate low voltage rails directly from

the main step-down converter or higher voltages using

coupled windings from the step-down converter. The

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