ADVANCED Monolithic System AMS1117 Service Manual

g

查询AMS1117_05供应商

Advanced AMS1117

Monolithic 1A LOW DROPOUT VOLTAGE REGULATOR

Systems

RoHS compliant

FEATURES APPLICATIONS

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

1.5V, 1.8V, 2.5V, 2.85V, 3.3V and 5.0V

• Post Re

• 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

• SOT-223, TO-252 and SO-8 package available • Battery Powered Instrumentation

GENERAL DESCRIPTION

The AMS1117 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 1.3V 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 AMS1117 devices are pin compatible with other three-terminal SCSI regulators and are offered in the low profile surface
mount SOT-223 package, in the 8L SOIC package and in the TO-252 (DPAK) plastic package.

ORDERING INFORMATION:

TO-252 SOT-223 8L SOIC

AMS1117CD AMS1117 AMS1117CS
AMS1117CD-1.5 AMS1117-1.5 AMS1117CS-1.5
AMS1117CD-1.8 AMS1117-1.8 AMS1117CS-1.8
AMS1117CD-2.5 AMS1117-2.5 AMS1117CS-2.5
AMS1117CD-2.85 AMS1117-2.85 AMS1117CS-2.85
AMS1117CD-3.3 AMS1117-3.3 AMS1117CS-3.3
AMS1117CD-5.0 AMS1117-5.0 AMS1117CS-5.0

PACKAGE TYPE OPERATING JUNCTION

TEMPERATURE RANGE

-40 to 125° C

-40 to 125° C

-40 to 125° C

-40 to 125° C

-40 to 125° C

-40 to 125° C

-40 to 125° C

*For additional available fixed voltages contact factory.

PIN CONNECTIONS

SOT-223 Top View

3 PIN FIXED/ADJUSTABLE
VERSION

1- Ground/Adjust
2- V

OUT

3- V

IN

1

2

3

ulators for Switching Supplies

8L SOIC Top View

GND/ADJ

V

OUT

V

OUT

V

IN

1
2
3
4

TO-252 FRONT VIEW

TAB IS

OUTPUT

3
2
1

8

N/C

7

V

OUT

6

V

OUT

5

N/C

Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone [phone] Fax [phone]

AMS1117

ABSOLUTE MAXIMUM RATINGS (Note 1)

Power Dissipation Internally limited Soldering information
Input Voltage 15V Lead Temperature (25 sec)
Operating Junction Temperature Thermal Resistance
Control Section
Power Transistor
Storage temperature

0°C to 125°C

0°C to 150°C

- 65°C to +150°C

SO-8 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

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

OUT

265°C

= 160°C/W

ϕ

JA

= 80°C/W

ϕ

JA

= 90°C/W*

ϕ

JA

can vary from

JA

Parameter

Device Conditions Min Typ Max Units

Reference Voltage
(Note 2)

Output Voltage
(Note 2)

Line Regulation AMS1117

AMS1117-1.5

AMS1117-1.8

AMS1117-2.5

AMS1117-2.85

AMS1117-3.3

AMS1117-5.0

Load Regulation
(Notes 2, 3)

AMS1117-1.5

AMS1117-1.8

AMS1117-2.5

AMS1117 I

AMS1117-1.5

AMS1117-1.8

AMS1117-2.5

AMS1117-2.85

AMS1117-3.3

AMS1117-5.0

AMS1117

= 10 mA

OUT

10mA ≤ I

≤ 1A , 3.0V≤ VIN ≤ 12V

0 ≤ I

OUT

≤ 1A , 3.3V≤ VIN ≤ 12V

0 ≤ I

OUT

≤ 1A , 4.0V≤ VIN ≤ 12V

0 ≤ I

OUT

≤ 1A , 4.35V≤ VIN ≤ 12V

0 ≤ I

OUT

≤ 1A , 4.75V ≤ VIN ≤ 12V

0 ≤ I

OUT

≤ 1A , 6.5V ≤ VIN ≤ 12V

0 ≤ I

OUT

= 10 mA , 1.5V≤ (VIN - V

I

LOAD

3.0V≤ V

IN

3.3V≤ V

IN

4.0V≤ V

IN

4.35V≤ V

4.75V≤ V

6.5V≤ V

IN

- V

(V

IN

OUT

= 5V, 0 ≤ I

V

IN

= 5V, 0 ≤ I

V

IN

= 5V, 0 ≤ I

V

IN

≤ 1A, 1.5V≤ (VIN - V

OUT

≤ 12V

≤ 12V

≤ 12V

≤ 12V

IN

≤ 12V

IN

≤ 12V

) =3V, 10mA ≤ I

≤ 1A

OUT

≤ 1A

OUT

≤ 1A

OUT

OUT

OUT

) ≤ 12V

OUT

≤ 1A

) ≤ 12V

1.238

1.225

1.485

1.476

1.782

1.773

2.475

2.460

2.82

2.79

3.267

3.235

4.950

4.900

1.250

1.250

1.500

1.500

1.800

1.800

2.500

2.500

2.850

2.850

3.300

3.300

5.000

5.000

0.015

0.035

0.3

0.3

0.3

0.3

0.5

0.5

3 6 10

3 6 10

3 6 12

0.6

0.6

0.6

0.6

1.0

1.0

0.1

0.2

1.262

1.270

1.515

1.524

1.818

1.827

2.525

2.560

2.88

2.91

3.333

3.365

5.050

5.100

0.2

0.2

5
6

5
6

6
6

6
6

10
10

10
10

0.3

0.4

20

20

20

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

mV
mV

Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone [phone] Fax [phone]

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at I

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

OUT

AMS1117

Parameter

Device Conditions Min Typ Max Units

Load Regulation

AMS1117-2.85

= 5V, 0 ≤ I

V

IN

(Notes 2, 3)
AMS1117-3.3

= 5V, 0 ≤ I

V

IN

OUT

OUT

≤ 1A

≤ 1A

3 6 12

20

3 7 15

25

AMS1117-5.0

Dropout Voltage

- V

OUT

)

(V

IN

Current Limit

Minimum Load

AMS1117-1.5/-1.8/-2.5/-

2.85/-3.3/-5.0
AMS1117-1.5/-1.8/-2.5/-

2.85/-3.3/-5.0
AMS1117 (VIN - V

= 8V, 0 ≤ I

V

IN

∆V

OUT

(VIN - V

, ∆V

≤ 1A

OUT

= 1%, I

REF

) = 5V

OUT

) = 12V (Note 5)

OUT

= 1A (Note 4)

OUT

5

10

1.1 1.3

900 1,100 1,500

5 10

20
35

Current

≤ 12V

V

Quiescent Current AMS1117-1.5/-1.8/-2.5/-

IN

2.85/-3.3/-5.0

Ripple Rejection AMS1117

AMS1117-1.5/-1.8/-2.5/-

2.85

AMS1117-3.3

AMS1117-5.0

f =120Hz , C
(V

IN-VOUT

f =120Hz , C

= 6V

V

IN

f =120Hz , C

= 6.3V

V

IN

f =120Hz , C

= 8V

V

IN

= 22µF Tantalum, I

OUT

) = 3V, C

ADJ

= 22µF Tantalum, I

OUT

= 22µF Tantalum, I

OUT

= 22µF Tantalum, I

OUT

=10µF

OUT

OUT

OUT

OUT

= 1A,

= 1A,

= 1A

= 1A

5

60 75

60

72

60 72

60 68

dB

10

Thermal Regulation AMS1117 TA = 25°C, 30ms pulse 0.008 0.04 %W

mV
mV

mV
mV

mV
mV

V

mA

mA

mA

dB

dB

dB

Adjust Pin Current AMS1117

Adjust Pin Current

AMS1117

Change
Temperature Stability

10mA ≤ I

10mA ≤ I

≤ 1A , 1.5V≤ (VIN - V

OUT

≤ 1A , 1.5V≤ (VIN - V

OUT

OUT

OUT

) ≤ 12V

) ≤ 12V

55

0.2

0.5

120

5

µA
µA

µA

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

OUT

)

(% of V
Thermal Resistance

= 25°C , 10Hz ≤ f ≤ 10kHz

T

A

0.003 %

15 °C/W

Junction-to-Case

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 1.2 W. 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 1.5V ≤ (V

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

- V

) ≤ 12V the device is

IN

OUT

Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone [phone] Fax [phone]