ADMOS AMS2911CT-5.0, AMS2911CT-3.3, AMS2911CT-2.85, AMS2911CT-2.5, AMS2911CT-1.5 Datasheet

Advanced AMS2911
Monolithic 1A LOW DROPOUT VOLTAGE REGULATOR

Systems

FEATURES APPLICATIONS

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

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

•• Output Current of 1A •• 5V to 3.3V Linear Regulator

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

•• Line Regulation: 0.2% Max. •• Active SCSI Terminators

•• Load Regulation: 0.4% Max. •• Power Management for Notebook

•• Available in TO-220, TO-263, TO-252 and SOT-223

packages

GENERAL DESCRIPTION

The AMS2911 series of adjustable and fixed voltage regulators are designed to provide 1A 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 AMS2911 devices are pin compatible with other three-terminal regulators and are offered in the 3 lead TO-220 package,
in the 3Lead TO-263 (Plastic DD), in the TO-252 (DPAK) and in the low profile surface mount SOT-223 package.

•• Post Regulators for Switching Supplies

•• Battery Powered Instrumentation

ORDERING INFORMATION:

PACKAGE TYPE OPERATING JUNCTION

3 LEAD TO-220 3 LEAD TO-263 TO-252 SOT-223

AMS2911CT AMS2911CM AMS2911CD AMS2911
AMS2911CT-1.5 AMS2911CM-1.5 AMS2911CD-1.5 AMS2911-1.5
AMS2911CT-2.5 AMS2911CM-2.5 AMS2911CD-2.5 AMS2911-2.5
AMS2911CT-2.85 AMS2911CM-2.85 AMS2911CD-2.85 AMS2911-2.85
AMS2911CT-3.3 AMS2911CM-3.3 AMS2911CD-3.3 AMS2911-3.3
AMS2911CT-5.0 AMS2911CM-5.0 AMS2911CD-5.0 AMS2911-5.0

*For additional available fixed voltages contact factory.

SOT-223 Top View

PIN CONNECTIONS

1

2

FIXED VERSION ADJUSTABLE VERSION

1- V

IN

2- Ground
3- V

OUT

1- V

IN

2- Adjust
3- V

OUT

TO-252 FRONT VIEW

3

3
2
1

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

TO-220 FRONT VIEW

3
2

1

TO-263 FRONT VIEW

3
2
1

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

AMS2911

Junction Temperature Range

JA

ABSOLUTE MAXIMUM RATINGS (Note 1)

Power Dissipation Internally limited Thermal Resistance
Input Voltage 15V TO-220 package
Operating
Control Section
Power Transistor
Storage temperature
Soldering information
Lead Temperature (10 sec)

0°C to 125°C

0°C to 150°C

- 65°C to +150°C
300°C

TO-263 package
TO-252 package
SOT-223 package

* With package soldering to copper area over backside
ground plane or internal power plane ϕ
46°C/W to >90°C/W depending on mounting technique and
the size of the copper area.

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at I

Parameter Device Conditions Min Typ Max Units

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

OUT

ϕ JA= 50°C/W

ϕ JA= 30°C/W

ϕ JA= 80°C/W

ϕ JA= 90°C/W*

can vary from

Reference Voltage
(Note 2)

Output Voltage
(Note 2)

Line Regulation AMS2911

Load Regulation
(Notes 2, 3)

AMS2911 I

AMS2911-1.5

AMS2911-2.5

AMS2911-2.85

AMS2911-3.3

AMS2911-5.0

AMS2911-1.5

AMS2911-2.5

AMS2911-2.85

AMS2911-3.3

AMS2911-5.0

AMS2911

AMS2911-1.5

AMS2911-2.5

AMS2911-2.85

AMS2911-3.3

AMS2911-5.0

= 10 mA

OUT

10mA ≤ I
0 ≤ I

0 ≤ I

0 ≤ I

0 ≤ I

0 ≤ I

I

LOAD

4.35V≤ VIN ≤ 12V

4.35V≤ VIN ≤ 12V

4.35V≤ VIN ≤ 12V

4.75V≤ VIN ≤ 12V

6.5V≤ VIN ≤ 12V

(VIN - V

VIN = 5V, 0 ≤ I

VIN = 5V, 0 ≤ I

VIN = 5V, 0 ≤ I

VIN = 5V, 0 ≤ I

VIN = 8V, 0 ≤ I

≤ 1A, 1.5V≤ (VIN - V

OUT

≤ 1A , 4.35V≤ VIN ≤ 12V

OUT

≤ 1A , 4.35V≤ VIN ≤ 12V

OUT

≤ 1A , 4.35V≤ VIN ≤ 12V

OUT

≤ 1A , 4.75V ≤ VIN ≤ 12V

OUT

≤ 1A , 6.5V ≤ VIN ≤ 12V

OUT

= 10 mA , 1.5V≤ (VIN - V

) =3V, 10mA ≤ I

OUT

OUT

OUT

OUT

OUT

OUT

≤ 1A

≤ 1A

≤ 1A

≤ 1A

≤ 1A

OUT

OUT

≤ 1A

) ≤ 12V

OUT

) ≤ 12V

1.238

1.225

1.485

1.476

2.475

2.460

2.82

2.79

3.267

3.235

4.950

4.900

1.250

1.250

1.500

1.500

2.500

2.500

2.850

2.850

3.300

3.300

5.000

5.000

0.015

0.035

0.3

0.6

0.3

0.6

0.3

0.6

0.5

1.0

0.5

1.0

0.1

0.2

3

6

3

6

3

6

3

7

5

10

1.262

1.270

1.515

1.524

2.525

2.540

2.88

2.91

3.333

3.365

5.050

5.100

.02

.02

5

6

6

6

6

6

10

10

10

10

0.3

0.4

10

20

12

20

12

20

15

25

20

35

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

mV
mV

mV
mV

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

AMS2911

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at I

Parameter Device Conditions Min Typ Max Units

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

OUT

Dropout Voltage
(V

- V

OUT

)

IN

Current Limit AMS2911/-1.5/-2.5/2.85/

AMS2911/-1.5/-2.5/-2.85/

-3.3/-5.0

∆V

OUT

(VIN - V

, ∆V

OUT

= 1%, I

REF

) = 5V

= 1A (Note 4)

OUT

1.3 1.5

.9 1.1 1.5

V

A

-3.3/-5.0

Minimum Load

AMS2911 (VIN - V

) = 12V (Note 5)

OUT

5 10

mA

Current
Quiescent Current AMS2911/-1.5/-2.5/-2.85/

VIN ≤ 12V

5 10

mA

-3.3/-5.0

Ripple Rejection AMS2911

AMS2911-1.5

f =120Hz , C
(VIN-V

) = 3V, C

OUT

f =120Hz , C

= 25µF Tantalum, I

OUT

=25µF

ADJ

= 25µF Tantalum, I

OUT

OUT

OUT

= 1A,

= 1A,

60 75

60 72

dB

dB

VIN = 6V

AMS2911-2.5

f =120Hz , C

= 25µF Tantalum, I

OUT

OUT

= 1A,

60 72

dB

VIN = 6V

AMS2911-2.85

f =120Hz , C

= 25µF Tantalum, I

OUT

OUT

= 1A,

60 72

dB

VIN = 6V

AMS2911-3.3

f =120Hz , C

= 25µF Tantalum, I

OUT

OUT

= 1A

60 72

dB

VIN = 6.3V

AMS2911-5

f =120Hz , C

= 25µF Tantalum, I

OUT

OUT

= 1A

60 68

dB

VIN = 8V

Thermal Regulation AMS2911 TA = 25°C, 30ms pulse 0.008 0.04 %W
Adjust Pin Current AMS2911

Adjust Pin Current

AMS2911

Change
Temperature Stability

10mA ≤ I

10mA ≤ I

≤ 1A , 1.5V≤ (VIN - V

OUT

≤ 1A , 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 1.2W. 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 1.5 ≤ (V

to regulate if the output current is greater than 10mA.

- V

) ≤12V the device is guaranteed

IN

OUT

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