MAX8529 datasheet(9/21 Pages) MAXIM

Part #	MAX8529

Description	1.5MHz Dual 180 Out-of-Phase PWM Step-Down Controller with POR

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Manufacturer	MAXIM [Maxim Integrated Products]

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The internal VL linear regulator can source over 50mA to

supply the IC, power the low-side gate driver, charge the

external boost capacitor, and supply small external

loads. When driving large FETs, little or no regulator cur-

rent may be available for external loads.

For example, when switched at 600kHz, a single large

FET with 18nC total gate charge requires 18nC ✕ 600kHz

= 11mA. To drive larger MOSFETs, or deliver larger

loads, connect VL to an external power supply from

4.75V to 5.5V.

1.5MHz Dual 180° Out-of-Phase

PWM Step-Down Controller with POR

_______________________________________________________________________________________

9

CONVERTER 1

R

S

Q

ILIM1

DL1

PGND

LX1

DH1

BST1

VL - 0.5V

FB1

COMP1

SOFT-START

DAC

OSCILLATOR

OSC

SYNC

CK0

V+

5V LINEAR

REGULATOR

VL

GND

REF

DL2

LX2

DH2

BST2

ILIM2

FB2

COMP2

CONVERTER 2

RESET

EN

UVLO

AND

SHUTDOWN

VREF

2.0V

MAX8529

RST

VREF

VL

Q

5

µA

gm

Figure 2. Functional Diagram

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Maxim Integrated Produc...	MAX8529	368Kb / 20P	1.5MHz Dual 180째 Out-of-Phase PWM Step-Down Controller with POR Rev 1; 4/07
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Similar Description - MAX8529

Manufacturer	Part #	Datasheet	Description
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