MAX5080 Datasheet | Maxim Integrated

Description The MAX5080/MAX5081 are 250k Hz PWM step-down DC-DC converters with an on-chip, 0.3 Ω high-side switch. The input voltage range is 4.5V to 40V for the MAX5080 and 7.5V to 40V for the MAX5081. The output is adjustable from 1.23V to 32V and can deliver up to 1A of load current. Both devices utilize a voltage-mode control scheme for good noise immunity in the high-voltage switching environment and offer external pensation allowing for maximum flexibility with a wide selection of inductor values and capacitor types. The switching frequency is internally fixed at 250k Hz and can be synchronized to an external clock signal through the SYNC input. Light load efficiency is improved by automatically switching to a pulse-skip mode. All devices include programmable undervoltage lockout and soft-start. Protection features include cycle-bycycle current limit, hiccup-mode output short-circuit protection, and thermal shutdown. Both devices are available in a space-saving, high-power (2.7W), 16-pin TQFN package and are rated for operation over the -40°C to +125°C temperature range. Features - 4.5V to 40V (MAX5080) or 7.5V to 40V (MAX5081) Input Voltage Range - 1A Output Current - VOUT Range From 1.23V to 32V - Internal High-Side Switch - Fixed 250k Hz Internal Oscillator - Automatic Switchover to Pulse-Skip Mode at Light Loads - External Frequency Synchronization - Thermal Shutdown and Short-Circuit Protection - Operates Over the -40°C to +125°C Temperature Range - Space-Saving (5mm x 5mm) High-Power 16-Pin TQFN Package MAX5080/MAX5081 Ordering Information PART MAX5080ATE MAX5081ATE TEMP RANGE -40°C to +125°C -40°C to +125°C PINPACKAGE 16 TQFN-EP- 16 TQFN-EP- PKG CODE T1655-2 T1655-2 Applications Fire Wire® Power Supplies Distributed Power Automotive Industrial - EP = Exposed pad. Pin Configurations appear at end of data sheet. Fire Wire is a registered trademark of Apple puter, Inc. Typical Operating Circuits VIN 4.5V TO 40V CF D1 IN R1 DVREG C- C+ BST LX CBST...