1A, 76V, High-Efficiency MAXPower

Step-Down DC-DC Converter

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9

Pin Description

PIN

NAME

FUNCTION

1

BST

Boost Capacitor Connection. Connect a 0.1µF ceramic capacitor from BST to LX.

2

VD

Internal Regulator Output. Bypass VD to GND with a 0.1µF ceramic capacitor.

3

SGND

Internal Connection. SGND must be connected to GND.

4FB

Output Sense Feedback Connection. For fixed output voltage (MAX5035A, MAX5035B, MAX5035C),

5

ON/OFF

Shutdown Control Input. Pull ON/OFF low to put the device in shutdown mode. Drive ON/OFF high for

normal operation.

6

GND

Ground

8

LX

Source Connection of Internal High-Side Switch

ENABLE

LX

BST

ON/OFF

REGULATOR

(FOR DRIVER)

REGULATOR

(FOR ANALOG)

OSC

RAMP

HIGH-SIDE

CURRENT

SENSE

CPFM

1.69V

CILIM

FB

x1

EAMP

CONTROL

LOGIC

CPWM

VD

GND

CLK

SGND

MAX5035

TYPE 3

COMPENSATION

THERMAL

SHUTDOWN

RAMP

Block Diagram