MAX1964TEEE datasheet(11/30 Pages) MAXIM

Part #	MAX1964TEEE

Description	Tracking/Sequencing Triple/Quintuple Power-Supply Controllers

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Manufacturer	MAXIM [Maxim Integrated Products]

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Tracking/Sequencing Triple/Quintuple

Power-Supply Controllers

______________________________________________________________________________________

11

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

Figure 1. MAX1964 Standard Application Circuit

BST

C1

1

µF

D1

CENTRAL CMPSH-3

C2

1

µF

NH

NL

CBST

0.1

µF

RPOK

100k

Ω

CCOMP1

470pF

CCOMP2

47pF

COUT

1000

µF

CIN

470

µF

DH

LX

VOUT1

5V AT 1A

INPUT

9V TO 18V

DL

OUT

GND

TO LOGIC

IN

VL

ILIM

POK

COMP

MAX1964

FB

RCOMP

5M

Ω

RGATE(NH)

10

Ω

L1

33

µH

RGATE(NL)

10

Ω

RBE2

220

Ω

C3

1

µF

Q1

TIP30

R3

4.64k

Ω

R1

30k

Ω

R2

10k

Ω

VOUT2

1.8V AT 300mA

C4

10

µF

R4

10k

Ω

B2

FB2

B3

FB3

CBE2

2200pF

INTERNATIONAL

RECTIFIER

IRF7101

RBE3

220

Ω

C5

1

µF

Q2

TIP32

POWER GROUND

ANALOG GROUND

COUT : 1000

µF, 10V SANYO (CZ SERIES)

R5

4.99k

Ω

VOUT3

3.3V AT 750mA

C6

10

µF

R4

3.0k

Ω

CBE3

1000pF

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