ABSOLUTE MAXIMUM RATINGS

SYMBOL

PARAMETER

VALUE

UNIT

Power Dissipation

Internally Limited

W

Input Voltage

15

V

Operation Junction Temperature Range

Control Section

0 to 125

Power Transistor

0 to 150

Storage Temperature Range

-65 to +150

Lead Temperature (Soldering 10 sec)

300

ELECTRICAL CHARACTERISTICS

PARAMETER

DEVICE

TEST CONDITIONS

MIN.

TYP.

MAX.

UNIT

1.238

1.250

1.262

Reference Voltage Note 1

AMS1085M

*

1.225

1.250

1.275

V

-1

-

+1

Output Voltage Note 1

All fixed

versions

*

-2

-

+2

%

Line Regulation Note 1

All

*

-

0.04

0.20

Load Regulation Note 1

All

*

-

0.2

0.40

%

Minimum Load Current

AMS1085M

*

-

3

7

mA

Ground Pin Current

All fixed

versions

*

-

7

10

mA

Adjust Pin Current

AMS1085M

*

-

40

90

µA

Current Limit

All

*

3

4.5

-

A

Ripple Rejection Note 2

All

*

60

65

-

dB

Dropout Voltage Note 1,3

All

*

-

1.3

1.5

V

Temperature Coefficient

All

*

-

0.005

-

%/

NOTES:

1: Low duty pulse testing with Kelvin connections required.

APPLICATION INFORMATION

The AMS1085M series of adjustable and fixed regulators are easy to use and have all the protection features expected in

high performance voltage regulators: short circuit protection and thermal shut-down.

Pin compatible with older three terminal adjustable regulators, these devices offer the advantage of a lower dropout voltage,

more precise reference tolerance and improved reference stability with temperature.

STABILITY

The circuit design used in the AMS1085M series requires the use of an output capacitor as part of the device frequency

compensation.

The addition of 150µF aluminum electrolytic or a 22µF solid tantalum on the output will ensure stability

for all operating conditions.

When the adjustment terminal is bypassed with a capacitor to improve the ripple rejection, the requirement

for an output capacitor increases. The value of 22µF tantalum or 150µF aluminum covers all cases of bypassing the

adjustment terminal. Without bypassing the adjustment terminal smaller capacitors can be used with equally good results.

LOW DROPOUT POSITIVE VOLTAGE REGULATOR

August 2005

Inv № 428

BEIJING ESTEK ELECTRONICS CO.,LTD

Page 2 of 3

ET- AMS1085M-XX