MAX8792 查看數據表（PDF） - Maxim Integrated

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MAX8792

Single Quick-PWM Step-Down Controller with Dynamic REFIN

Maxim Integrated 

Single Quick-PWM Step-Down

Controller with Dynamic REFIN

Pin Description (continued)

PIN

NAME

FUNCTION

Open-Drain Power-Good Output. PGOOD is low when the output voltage is more than 200mV (typ)

14

PGOOD below or 300mV (typ) above the target voltage (VREFIN), during soft-start and soft-shutdown. After the

soft-start circuit has terminated, PGOOD becomes high impedance if the output is in regulation.

PGOOD is blanked—forced high-impedance state—when a dynamic REFIN transition is detected.

EP

GND

Ground/Exposed Pad. Internally connected to the controller’s ground plane and substrate.

(15)

Connect directly to ground.

5V BIAS

SUPPLY

AGND

ON OFF

GND/OPEN/REF/VDD

AGND

AGND

LO HI

R3

97.6kΩ

AGND

2 VDD

C1

1μF

C2 PWR

1μF

13 VCC

R10

100kΩ

14 PGOOD

TON 7

BST 6

DH 5

4

LX

3

DL

C3

1000pF

1 EN MAX8792

8

12 SKIP

FB

11 REF

R1

49.9kΩ

R2

54.9kΩ

10 REFIN

9

ILIM

GND (EP)

AGND PWR

RTON

200kΩ

CBST

0.1μF

PWR

NTC

100kΩ

B = 4250

R4

68kΩ

R5

82kΩ

AGND

Figure 1. MAX8792 Standard Application Circuit

INPUT

7V TO 24V

CIN

PWR

L1

OUTPUT

1.05V/1.50V

10A (MAX)

COUT

PWR

REF

SEE TABLE 1 FOR COMPONENT SELECTION.

Standard Application Circuits

The MAX8792 standard application circuit (Figure 1) gen-

erates a 1.5V or 1.05V output rail for general-purpose use

in a notebook computer. See Table 1 for component

selections. Table 2 lists the component manufacturers.

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