Conclusion

The MAX8561 successfully meets the quality and reliability standards required of all Maxim products. In addition,

Maxim’s continuous reliability monitoring program ensures that all outgoing product will continue to meet Maxim’s quality

and reliability standards.

Table of Contents

I. ........Device Description

V. ........Quality Assurance Information

II. ........Manufacturing Information

VI. .......Reliability Evaluation

III. .......Packaging Information

IV. .......Die Information

.....Attachments

I. Device Description

A. General

The MAX8561 step-down dc-dc converter is optimized for applications that prioritize small size and high efficiency. It

utilizes a proprietary hysteretic-PWM control scheme that switches with fixed frequency and is adjustable up to

4MHz, allowing customers to trade efficiency for smaller external components. Output current is guaranteed up to

500mA, while quiescent current is only 40µA (typ).

Internal synchronous rectification greatly improves efficiency and eliminates the external Schottky diode required in

conventional step-down converters. Built-in soft-start eliminates inrush current to reduce input capacitor

requirements. The MAX8561 features logic-controlled output voltage.

The MAX8561 is available in space-saving 8-pin 3mm x 3mm Thin DFN packages.

B. Absolute Maximum Ratings

Item

Rating

IN, FB, SHDN, ODI, ODO to GND

-0.3V to +6V

LX to GND (Note 1)

-0.3V to (VIN + 0.3V)

PGND to GND

-0.3V to +0.3V

LX Current

1.27A

Output Short Circuit to GND (typical operating circuit)

10s

Operating Temperature Range

-40°C to +85°C

Junction Temperature

+150°C

Storage Temperature Range

-65°C to +150°C

Lead Temperature (soldering, 10s)

+300°C

Continuous Power Dissipation (TA = +70°C)

8-Pin Thin DFN (3 x 3)

1951mW

Derates above +70°C

8-Pin Thin DFN (3 x 3)

24.4mW/°C

Note 1: LX has internal clamp diodes to PGND and IN. Applications that forward bias these diodes should take care

not to exceed the IC’s package power-dissipation limits.