Advanced Monolithic Systems AMS2906 Service Manual

http://www.BDTIC.com/AMS

Advanced AMS2906
Monolithic 600mA 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

• Output Current of 600mA •••• 5V to 3.3V Linear Regulator

•

•

•

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

•••• Line Regulation: 0.2% Max. •••• Sound Cards

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

•••• TO-252, SOT-223 and SOT-89 packages •••• Battery Powered Instrumentation

GENERAL DESCRIPTION

The AMS2906 series of adjustable and fixed voltage regulators are designed to provide 600mA output current and to operate

own to 1V input-to-output differential. The dropout voltage of the device is guaranteed maximum 1.3V at maximum output

d
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 AMS2906 devices are pin compatible with other three-terminal regulators and are offered in the low profile surface mount
TO-252(DPAK), SOT-223 and SOT-89 packages.

ORDERING INFORMATION:

AMS2906CL AMS2906CD AMS2906
AMS2906CL-1.5 AMS2906CD-1.5 AMS2906-1.5
AMS2906CL-1.8 AMS2906CD-1.8 AMS2906-1.8
AMS2906CL-2.5 AMS2906CD-2.5 AMS2906-2.5
AMS2906CL-2.85 AMS2906CD-2.85 AMS2906-2.85
AMS2906CL-3.3 AMS2906CD-3.3 AMS2906-3.3
AMS2906CL-5.0 AMS2906CD-5.0 AMS2906-5.0
*For additional available fixed voltages contact factory.

SOT-89 TO-252 SOT-223

PACKAGE TYPE O

PIN CONNECTIONS

FIXED VERSION

1- Ground
2- V
3-

OUT

VIN

ADJUSTABLE VERSION

1- Adjust
2- V
3- VIN

OUT

•••• Post Regulators for Switching Supplies

PERATING 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

SOT-223 Top View

TO-252 Front View

1

2

3

3

2

1

SOT-89 Top View

321

updated April 24, 2009

http://www.BDTIC.com/AMS

AMS2906

ABSOLUTE MAXIMUM RATINGS (Note 1)

Power Dissipation Internally limited

OPERATING CONDITIONS (Note 1)

Maximum Input Voltage 15V Input Voltage Range 2.6V to 12V
Thermal Resistance Junction Temperature
SOT-89 package
TO-252 package
SOT-223 package
Storage temperature

ϕ JA= 110°C/W

ϕ JA= 80°C/W

ϕ JA= 90°C/W*

65°C to +150°C

-

Control Section -40ºC to 125 ºC
Power Transistor -40ºC to 150 ºC
Lead Temperature (Sold. 25 sec) 265 ºC

* 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

can vary from

JA

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at I

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

OUT

Parameter

Device Conditions Min Typ Max Units

Reference Voltage
(Note 2)

Output Voltage
(Note 2)

Line Regulation AMS2906

AMS2906-1.5

AMS2906-1.8

AMS2906-2.5

AMS2906-2.85

AMS2906-3.3

AMS2906-5.0

Load Regulation

(Notes 2, 3)

AMS2906-1.5

AMS2906-1.8

AMS2906-2.5

AMS2906 I

AMS2906-1.5

AMS2906-1.8

AMS2906-2.5

AMS2906-2.85

AMS2906-3.3

AMS2906-5.0

AMS2906

= 10 mA

OUT

10mA ≤ I

0 ≤ I

0 ≤ I

0 ≤ I

0 ≤ I

0 ≤ I

0 ≤ I

I

LOAD

3.0V≤ VIN ≤ 12V

3.0V≤ VIN ≤ 12V

4.0V≤ 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

≤ 600mA, 1.5V≤ (VIN - V

OUT

≤ 600mA , 4.35V≤ VIN ≤ 12V

OUT

≤ 600mA , 4.35V≤ VIN ≤ 12V

OUT

≤ 600mA , 4.35V≤ VIN ≤ 12V

OUT

≤ 600mA , 4.35V≤ VIN ≤ 12V

OUT

≤ 600mA , 4.75V ≤ VIN ≤ 12V

OUT

≤ 600mA , 6.5V ≤ VIN ≤ 12V

OUT

= 10 mA , 1.5V≤ (VIN - V

) =3V, 10mA ≤ I

OUT

≤ 600mA

OUT

≤ 600mA

OUT

≤ 600mA

OUT

OUT

≤ 600mA

OUT

OUT

) ≤ 12V

) ≤ 12V

updated April 24, 2009

1.238

1.225

1.485

1.476

1.782

1.772

2.475

2.460

2.82

2.79

3.267

3.235

4.950

4.900

0.015

0.3

0.3

0.3

0.3

0.5

0.5

3

3

3

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

0.035

0.6

0.6

0.6

0.6

1.0

1.0

0.1

0.2

6

6

6

1.262

1.270

1.515

1.524

1.818

1.828

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

10
20

10
20

12
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

http://www.BDTIC.com/AMS

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at I

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

OUT

AMS2906

Parameter

Device Conditions Min Typ Max Units

Load Regulation

(Notes 2, 3)

Dropout Voltage

(V

- V

OUT

)

IN

Current Limit

Minimum Load
Current

Quiescent Current AMS2906-1.5/-1.8/-2.5/-

Ripple Rejection AMS2906

AMS2906-1.5/-1.8/-2.5/-

AMS2906-3.3

AMS2906-5.0

Thermal Regulation AMS2906 TA = 25°C, 30ms pulse 0.008 0.04 %W

AMS2906-2.85

AMS2906-3.3

AMS2906-5.0

AMS2906-1.5/-1.8/-2.5/-

2.85/-3.3/-5.0

AMS2906-1.5/-1.8/-2.5/-

2.85/-3.3/-5.0

VIN = 5V, 0 ≤ I

VIN = 5V, 0 ≤ I

VIN = 8V, 0 ≤ I

∆V

OUT

(VIN - V

AMS2906 (VIN - V

VIN ≤ 12V

2.85/-3.3/-5.0

f =120Hz , C
(VIN-V

f =120Hz , C

2.85

VIN = 6V

f =120Hz , C
VIN = 6.3V

f =120Hz , C
VIN = 8V

≤ 600mA

OUT

≤ 600mA

OUT

≤ 600mA

OUT

, ∆V

= 1%, I

REF

) = 5V

OUT

) = 12V (Note 5)

OUT

= 25µF Tantalum, I

OUT

) = 3V, C

OUT

= 25µF Tantalum, I

OUT

= 25µF Tantalum, I

OUT

= 25µF Tantalum, I

OUT

= 600mA (Note 4)

OUT

=25µF

ADJ

= 600mA,

OUT

= 600mA,

OUT

= 600mA

OUT

= 600mA

OUT

3

3

5

10

1.1 1.3

6

7

12
20

15
25

20

35

800 1,000 1,200

5 10

60 75

60

60 72

60 68

5

72

dB

10

mV
mV

mV
mV

mV
mV

V

mA

mA

mA

dB

dB

dB

Adjust Pin Current AMS2906

Adjust Pin Current

AMS2906

Change

Temperature Stability

10mA ≤ I

10mA ≤ I

≤ 600mA , 1.5V≤ (VIN - V

OUT

≤ 600mA , 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

(% of V

OUT

)

Thermal Resistance
Junction-to-Case

TA = 25°C , 10Hz ≤ f ≤ 10kHz

0.003

15 °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 for SOT-223 package and 0.9W for SOT-89 package. 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

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

maintain regulation. When 1.5V ≤ (VIN - V

) ≤ 12V the device is

OUT

updated April 24, 2009