ETA2821 ETA | Alldatasheet

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Technical content

www.ETAsolution.com Outperform with Efficiency Proprietary Information DO NOT Distribute 1 42V Input Standoff Voltage, 1.5A Step-Down Converter in SOT23-6

DESCRIPTION

The ETA2821 is a wide input range, high-efficiency, and high frequency DC-to-DC step-down switching regulator, capable of delivering up to 1.5A of output current. With a fixed switching frequency of 650KHz, this current mode PWM controlled converter allows the use of small external components, such as ceramic input and output caps, as well as small inductors.ETA2821 also employs a proprietary control scheme that switches the device into a power save mode during light load, thereby extending the range of high efficiency operation. An OVP function protects the IC itself and its downstream system against input voltage surges. With this OVP function, the IC can stand off input voltage as high as 42V, making it an ideal solution for industrial applications such as smart meters as well as automotive applications. In automotive systems, power comes from the battery, with its voltage typically between 9V and 24V. Including cold crank and double battery jump-starts, the minimum input voltage may be as low as 4V and the maximum up to 36V, with even higher transient voltages. With these high input voltages, linear regulators cannot be used for high supply currents without overheating the regulator. Instead, high efficiency switching regulators such as ETA2821 must be used to minimize thermal dissipation. ETA2821 is available SOT23-6 Packages.

FEATURES

 Wide Input Operating Range from 4V to 38V  Standoff Input Voltage: 42V  High Efficiency at 12V In 5V Out: Up to 91%:  High Efficiency PFM mode at light load  Capable of Delivering 1.5A  No External Compensation Needed  Current Mode control  Logic Control Shutdown  Thermal shutdown and UVLO  Available in SOT23-6 Package

APPLICATIONS

 Smart Meters  Industrial Applications  Automotive Applications

ORDERING INFORMATION

PART # PACKAGE PIN TOP MARK ETA2821S2G-T SOT23-6 EGYW Date Code Product Number TYPICAL APPLICATION GND FB IN SW VOUT 5.0V/1.5A10μH 84K 16K EN 50V 10μF 6.3V 22μF BST 10nF1 VIN Standoff up to 42V 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 0.01 0.1 1 ŋ IOUT (A) Efficiency Vs IOUT VIN=6V VIN=12V VIN=24V VIN=36VVOUT=5V