ADMOS AMS1085CT-5.0, AMS1085CT-3.5, AMS1085CT-3.3, AMS1085CT-3.0, AMS1085CT-2.85 Datasheet

Advanced AMS1085
Monolithic 3A LOW DROPOUT VOLTAGE REGULATOR

Systems

FEATURES APPLICATIONS

•• Three Terminal Adjustable or Fixed Voltages •• High Efficiency Linear Regulators

1.5V, 2.5V, 2.85V, 3.0V, 3.3V, 3.5V and 5.0V

•• Output Current of 3A •• Microprocessor Supply

•• Operates Down to 1V Dropout •• Battery Chargers

•• Load Regulation: 0.1% •• Constant Current Regulators

•• Line Regulation: 0.015% •• Notebook/Personal Computer Supplies

•• TO-220, TO-263 and TO-252 packages available •• Portable Instrumentation

GENERAL DESCRIPTION

The AMS1085 series of adjustable and fixed voltage regulators are designed to provide 3A output current and to operate
down to 1V input-to-output differential. The dropout voltage of the device is guaranteed maximum 1.5V at maximum output
current, decreasing at lower load currents.
On-chip trimming adjusts the reference voltage to 1%. Current limit is also trimmed, minimizing the stress under overload
conditions on both the regulator and power source circuitry.
The AMS1085 devices are pin compatible with older three-terminal regulators and are offered in 3 lead TO-220 package, 3
and 2 lead TO-263 (Plastic DD) and TO-252 (D PAK) package.

•• Post Regulators for Switching Supplies

ORDERING INFORMATION:

PACKAGE TYPE OPERATING JUNCTION

3 LEAD TO-220 2&3 LEAD TO-263 TO-252

AMS1085CT AMS1085CM AMS1085CD
AMS1085CT-1.5 AMS1085CM-1.5 AMS1085CD-1.5
AMS1085CT-2.5 AMS1085CM-2.5 AMS1085CD-2.5
AMS1085CT-2.85 AMS1085CM-2.85 AMS1085CD-2.85
AMS1085CT-3.0 AMS1085CM-3.0 AMS1085CD-3.0
AMS1085CT-3.3 AMS1085CM-3.3 AMS1085CD-3.3
AMS1085CT-3.5 AMS1085CM-3.5 AMS1085CD-3.5
AMS1085CT-5.0 AMS1085CM-5.0 AMS1085CD-5.0

PIN CONNECTIONS

FIXED VERSION

1- Ground
2- V

OUT

3- V

IN

ADJUSTABLE VERSION

1- Adjust
2- V

OUT

3- V

IN

TEMPERATURE RANGE

0 to 125° C
0 to 125° C
0 to 125° C
0 to 125° C
0 to 125° C
0 to 125° C
0 to 125° C
0 to 125° C

TO-252 FRONT VIEW

TAB IS

OUTPUT

2L TO-263 FRONT VIEW

TAB IS

OUTPUT

3
2
1

3
2
1

TAB IS

OUTPUT

3L TO-263 FRONT VIEW

TAB IS

OUTPUT

TO-220 FRONT VIEW

3
2

1

3
2

1

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone [phone] Fax [phone]

AMS1085

Junction Temperature Range

JA

ABSOLUTE MAXIMUM RATINGS (Note 1)

Power Dissipation Internally limited Soldering information
Input Voltage 15V Lead Temperature (10 sec)
Operating
Control Section
Power Transistor
Storage temperature

0°C to 125°C

0°C to 150°C

- 65°C to +150°C

Thermal Resistance
TO-220 package
TO-263 package
TO-252 package

* With package soldering to 0.5in2 copper area over
backside ground plane or internal power plane ϕ
from 20°C/W to >40°C/W depending on mounting
technique.

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at I

Parameter Device Conditions Min Typ Max Units

= 0 mA, and TJ = +25°C unless otherwise specified.

OUT

300°C

ϕ JA= 50°C/W

ϕ JA= 30°C/W *

ϕ JA= 100°C/W

can vary

Reference Voltage
(Note 2)

Output Voltage
(Note 2)

Line Regulation AMS1085/-1.5/-2.5/-2.85/

Load Regulation
(Notes 2, 3)

Dropout Voltage
(V

- V

OUT

)

IN

AMS1085 I

AMS1085-1.5

AMS1085-2.5

AMS1085-2.85

AMS1085-3.0

AMS1085-3.3

AMS1085-3.5

AMS1085-5.0

-3.0/-3.3/-3.5/-5.0
AMS1085

AMS1085-1.5

AMS1085-2.5

AMS1085-2.85

AMS1085-3.0

AMS1085-3.3

AMS1085-3.5

AMS1085-5.0

AMS1085/-1.5/-2.5/-2.85/

-3.0/-3.3/-3.5/-5.0

= 10 mA

OUT

10mA ≤ I
0 ≤ I

0 ≤ I

0 ≤ I

0 ≤ I

0 ≤ I

0 ≤ I

0 ≤ I

I

LOAD

(VIN - V

VIN = 5V, 0 ≤ I

VIN = 5V, 0 ≤ I

VIN = 5V, 0 ≤ I

VIN = 5V, 0 ≤ I

VIN = 5V, 0 ≤ I

VIN = 5.25V, 0 ≤ I

VIN = 8V, 0 ≤ I

∆V

≤ 3A, 1.5V≤ (VIN - V

OUT

≤ 3A , 3V≤ VIN ≤ 12V

OUT

≤ 3A , 4V≤ VIN ≤ 12V

OUT

≤ 3A , 4.35V≤ VIN ≤ 12V

OUT

≤ 3A , 4.5V ≤ VIN ≤ 12V

OUT

≤ 3A , 4.75V ≤ VIN ≤ 12V

OUT

≤ 3A , 5V ≤ VIN ≤ 12V

OUT

≤ 3A , 6.5V ≤ VIN ≤ 12V

OUT

= 10 mA , 1.5V≤ (VIN - V

) =3V, 10mA ≤ I

OUT

OUT

OUT

OUT

OUT

OUT

OUT

, ∆V

OUT

= 1%, I

REF

≤ 3A

≤ 3A

≤ 3A

≤ 3A

≤ 3A

OUT

≤ 3A

≤ 3A

≤ 3A

OUT

= 3 A (Note 4)

OUT

OUT

) ≤ 12V

OUT

) ≤ 12V

1.238

1.225

1.485

1.470

2.475

2.450

2.82

2.79

2.970

2.940

3.267

3.235

3.465

3.430

4.950

4.900

1.250

1.250

1.500

1.500

2.500

2.500

2.850

2.850

3.000

3.000

3.300

3.300

3.500

3.500

5.000

5.000

0.3

0.6

0.1

0.2

3

6

3

6

3

6

3

6

3

7

3

6

5

10

1.3 1.5

1.262

1.270

1.515

1.530

2.525

2.550

2.88

2.91

3.300

3.360

3.333

3.365

3.535

3.570

5.050

5.100

10

10

.03

.04

12

20

12

20

12

20

12

20

15

25

15

25

20

35

V
V

V
V

V
V

V

V
V

V
V

V
V

V
V

mV
mV

%
%

mV
mV

mV
mV

mV
mV

mV
mV

mV
mV

mV
mV

mV
mV

V

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone [phone] Fax [phone]

AMS1085

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at I

Parameter Device Conditions Min Typ Max Units

= 0 mA, and TJ = +25°C unless otherwise specified.

OUT

Current Limit AMS1085/-1.5/-2.5/-2.85/

(VIN - V

OUT

) = 5V

3.00 3.50 4.00

A

-3.0/-3.3/-3.5/-5.0

Minimum Load

AMS1085 (VIN - V

) = 12V (Note 5)

OUT

5 10

mA

Current
Quiescent Current AMS1085/-1.5/-2.5/-2.85/

VIN ≤ 12V

5 10

mA

-3.0/-3.3/-3.5/-5.0

Ripple Rejection AMS1085

AMS1085-1.5

f =120Hz , C
(VIN-V

) = 3V, C

OUT

f =120Hz , C

= 25µF Tantalum, I

OUT

=25µF

ADJ

= 25µF Tantalum, I

OUT

OUT

OUT

= 3A,

= 3A,

60 75

60 72

dB

dB

VIN = 4.5V

AMS1085-2.5

f =120Hz , C

= 25µF Tantalum, I

OUT

OUT

= 3A,

60 72

dB

VIN = 5.5V

AMS1085-2.85

f =120Hz , C

= 25µF Tantalum, I

OUT

OUT

= 3A,

60 72

dB

VIN = 6V

AMS1085-3.0

f =120Hz , C

= 25µF Tantalum, I

OUT

OUT

= 3A

60 72

dB

VIN = 6V

AMS1085-3.3

f =120Hz , C

= 25µF Tantalum, I

OUT

OUT

= 3A

60 72

dB

VIN = 6.3V

AMS1085-3.5

f =120Hz , C

= 25µF Tantalum, I

OUT

OUT

= 3A

60 72

dB

VIN = 6.5V

AMS1085-5.0

f =120Hz , C

= 25µF Tantalum, I

OUT

OUT

= 3A

60 68

dB

VIN = 8V

Thermal Regulation AMS1085 TA = 25°C, 30ms pulse 0.008 0.04 %W
Adjust Pin Current AMS1085

Adjust Pin Current

AMS1085

Change
Temperature Stability

10mA ≤ I

10mA ≤ I

≤ 3A , 1.5V≤ (VIN - V

OUT

≤ 3A , 1.5V≤ (VIN - V

OUT

OUT

OUT

) ≤ 12V

) ≤12V

55

120

0.2 5

0.5

µA
µA

µA

%
Long Term Stability TA =125°C, 1000Hrs 0.3 1 %
RMS Output Noise

(% of V

OUT

)

Thermal Resistance
Junction-to-Case

TA = 25°C , 10Hz ≤ f ≤ 10kHz

M Package: Control Circuitry/ Power Transistor
T Package: Control Circuitry/ Power Transistor

0.003 %

1.5/4.0

1.5/4.0

°C/W
°C/W

Parameters identified with boldface type apply over the full operating temperature range.

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. For guaranteed specifications and test conditions, see the

Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed.

Note 2: Line and Load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the input/output differential

and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range.

Note 3: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction

temperature by low duty cycle pulse testing. Load regulation is measured at the output lead ~1/8” from the package.

Note 4: Dropout voltage is specified over the full output current range of the device.
Note 5: Minimum load current is defined as the minimum output current required to maintain regulation. When (V

regulate if the output current is greater than 10mA.

- V

) = 12V the device is guaranteed to

IN

OUT

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone [phone] Fax [phone]