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EZ1085

3 Amp Positive Voltage Regulator

POWER MANAGEMENT

Revision: January 25, 2006

The EZ1085 series of high performance positive voltage

regulators are designed for use in applications requiring

low dropout performance at up to 3A. Additionally, the

EZ1085 series provides excellent regulation over

variations in line, load and temperature.

Outstanding features include low dropout performance

at rated current, fast transient response, internal

current limiting and thermal shutdown protection of the

output device.

A variety of options are available for maximum flexibility:

the EZ1085C has both fixed and adjustable voltage

options and is designed for use in commercial applica-

tions and the EZ1085I is adjustable only for industrial

applications.

All devices are available in the popular TO-220 and

TO-263 packages.

Low dropout voltage: 1.3V max. for EZ1085C,

1.4V max. for EZ1085I

Full current rating over line and temperature

Fast transient response

±2% total output regulation over line, load and

temperature

Adjust pin current max 90µA over temperature

Fixed/adjustable output voltage (EZ1085C)

Line regulation typically 0.015%

Load regulation typically 0.05%

Industrial temperature range (EZ1085I)

TO-220 and TO-263 packages. Available in RoHS

compliant package

Printer and plotter supplies

Instrumentation

Medical equipment

Microcontroller systems

Telecommunication systems

Motherboards

Switching supply post regulation

Description

Features

Applications

Fixed Voltage Regulator

Adjustable Voltage Regulator

Typical Application Circuit

VIN > 4.75V

VOUT = 3.45V

VOUT = 3.3V

VIN > 4.75V

U1

EZ1085

1

2

3

ADJ

OUT

IN

TAB

+

C2

10uF Tant. Min.

R1

133 Ohm, 1%

+

C1

10uF Tant.

U1

EZ1085C-3.3

1

2

3

GND

OUT

IN

TAB

R2

232 Ohm, 1%

+

C1

10uF Tant.

+

C2

10uF Tant. Min

Notes:

(1) C1 needed if device is far from filter capacitors

(2) C2 minimum value required for stability

2

R

I

1

R

2

R

1

V

V

ADJ

REF

OUT

•

+











 +

•

=