Advanced Monolithic Systems AMS1505V Service Manual

http://www.BDTIC.com/AMS

Advanced AMS1505V

Monolithic 5A ULTRA LOW DROPOUT VOLTAGE REGULATORS

Systems

RoHS compliant

FEATURES APPLICATIONS

• Adjustable or Fixed Output • High Speed Video/Graphic Cards

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

• Post Re

• Output Current of 5A • Microprocessor Supply

• Low Dropout, 350mV max. at 5A Output Current • Adjustable Power Supply

• Fast Transient Response • Notebook/Personal Computer Supplies

• Remote Sense • High Current Regulators

GENERAL DESCRIPTION

Designed specially for video applications where a very low dropout is critical, the AMS1505V series of adjustable and fixed low dropout voltage regulators provide 5A output current to power the new generation of high speed video cards. The dropout voltage of the device is 200mV max. at 3A loads and rising to 350mV at maximum output current. A second low current input voltage 1V or greater then the output voltage is required to achieve this dropout. New features have been added to the AMS1505V: a remote Sense pin is brought out virtually eliminating output voltage variations due to load changes. The typical load regulation, measured at the Sense pin, for a load current step of 100mA to 5A is less than 1mV. The AMS1505V series has fast transient response. To further improve the transient response the addition of a small capacitor on the Adjust pin is recommended. The AMS1505V series are ideal for generating supplies of 2V to 3V on boards where both 5V and 3.3V supplies are available.

The AMS1505V devices are offered in 5 lead TO-220 and TO-263 (plastic DD) packages.

ORDERING INFORMATION:

PIN CONNECTIONS

5 LEAD TO-263 5 LEAD TO-220

AMS1505CMV AMS1505CTV AMS1505CMV-1.5 AMS1505CTV-1.5 AMS1505CMV-2.5 AMS1505CTV-2.5 AMS1505CMV-2.85 AMS1505CTV-2.85 AMS1505CMV-3.0 AMS1505CTV-3.0 AMS1505CMV-3.3 AMS1505CTV-3.3 AMS1505CMV-3.5 AMS1505CTV-3.5 AMS1505CMV-5.0 AMS1505CTV-5.0

PACKAGE TYPE OPERATING

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

ulators for Switching Supplies

5 LEAD TO-220

V 4 3 2 1

FRONT VIEW

POWER

CONTROL

OUTPUT

ADJUST/GND

SENSE

5 LEAD TO-263

Vpower

Vcontrol

OUTPUT ADJUST/GND

SENSE

FRONT VIEW

AMS1505V

http://www.BDTIC.com/AMS

ABSOLUTE MAXIMUM RATINGS (Note 1)

Input Voltage 7V Soldering information

POWER

CONTROL

Operating Junction Temperature Therma Control Section Power Transistor Storage temperature

Input Voltage 13V Lead Temperature (25 sec)

l Resistance

0°C to 125°C

0°C to 150°C

- 65°C to +150°C

TO-220 package TO-263 package

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

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at I

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

LOAD

265°C

= 50°C/W

= 30°C/W*

can vary from 20°C/W to

Parameter

Device Conditions Min Typ Max Units

Reference Voltage AMS1505V V

Output Voltage

AMS1505V-1.5 V

AMS1505V-2.5 V

AMS1505V-2.85 V

AMS1505V-3.0 V

AMS1505V-3.3 V

AMS1505V-3.5 V

AMS1505V-5.0 V

Line Regulation AMS1505V/-1.5/-2.5/

-2.85/-3.0/-3.3/-3.5/-5.0

Load Regulation

Minimum Load

AMS1505V/-1.5/-2.5/

-2.85/-3.0/-3.3/-3.5/-5.0 AMS1505V V

= 2.75V, V

CONTROL

= 2.7V to 12V, V

CONTROL

= 10mA to 5A

LOAD

= 4V, V

CONTROL

= 3V, V

CONTROL

= 5V, V

CONTROL

= 4V, V

CONTROL

= 5.35V, V

CONTROL

= 4.4V, V

CONTROL

= 5.5V, V

CONTROL

= 4.5V, V

CONTROL

= 5.8V, V

CONTROL

= 4.8V, V

CONTROL

= 6V, V

CONTROL

= 5V, V

CONTROL

= 7.5V, V

CONTROL

= 6.5V, V

CONTROL

= 10 mA , 1.5V≤ (V

LOAD

0.8V≤ (V V

POWER

= V

CONTROL

= 10mA to 5A

LOAD

= 5V, V

CONTROL

POWER POWER

- V + 2.5V, V

OUT

POWER

POWER POWER

) ≤ 5.5V

OUT

=2V, I

POWER

=2.V, I =2.3V, I

=3.3V, I =3.3V, I

=3.35V, I

=3.7V, I =3.5V, I

=3.8V, I =3.8V, I

=4.1V, I

=4V, I

LOAD

=4.3V, I

=5.5V, I =5.8V, I

CONTROL

POWER

=3.3V, V

= 10mA

LOAD

=3.3V to 5.5V,

= 0mA

LOAD

= 0mA to 5A

LOAD

= 0mA

LOAD

= 0mA to 5A

LOAD

= 0mA

LOAD

= 0mA to 5A

LOAD

= 0mA

LOAD

= 0mA to 5A

LOAD

= 0mA

LOAD

= 0mA to 5A

LOAD

= 0mA

= 0mA to 5A

LOAD

= 0mA

LOAD

= 0mA to 5A

LOAD

- V

) ≤ 12V

OUT

+ 0.8V,

OUT

= 0V (Note 3)

ADJ

Current Control Pin Current

(Note 4)

Ground Pin Current (Note 4)

Adjust Pin Current AMS1505V V Ripple Rejection AMS1505V/-1.5/-2.5/

AMS1505V/-1.5/-2.5/

-2.85/-3.0/-3.3/-3.5/-5.0 AMS1505V/-1.5/-2.5/

-2.85/-3.0/-3.3/-3.5/-5.0

CONTROL

= 10mA to 5A

LOAD

CONTROL

= 10mA to 5A

LOAD

CONTROL

= 2A

LOAD

= V

+ 2.5V, V

OUT

= V

+ 2.5V, V

OUT

= 2.75V, V = V

POWER

= V

POWER

OUT

POWER

= 2.05V, I

+ 2.5V, V

+ 0.8V,

OUT

+ 0.8V,

OUT

= 10mA

LOAD

= 1V

RIPPLE

P-P

Thermal Regulation AMS1505V TA = 25°C, 30ms pulse 0.002 0.020 %W

1.238 1.250 1.262 V

1.485 1.500 1.515 V

2.475 2.500

2.833 2.850

2.970 3.000

3.235 3.300

3.430 3.500

2.525

2.867

3.030

3.333

3.535

4.950 5.000 5.030 V

1 3

5 10

50 85

6 10

50 120

µA

60 80 dB

Thermal Resistance

T Package: Control Circuitry/ Power Transistor

Junction-to-Case

M Package: Control Circuitry/ Power Transistor

0.65/2.70

°C/W °C/W

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ELECTRICAL CHARACTERISTICS

Electrical Characteristics at I

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

OUT

AMS1505V

Parameter

Device Conditions Min Typ Max Units

Dropout Voltage

Control Dropout (V

Power Dropout (V

CONTROL

POWER

- V

OUT

)

AMS1505V/-1.5/-2.5/

)

-2.85/-3.0/-3.3/-3.5/-5.0 AMS1505V/-1.5/-2.5/

-2.85/-3.0/-3.3/-3.5/-5.0

Note 2

POWER

CONTROL

=V =V

OUT

+ 0.8V, I + 0.8V, I

+ 2.5V, I + 2.5V, I

LOAD

= 10mA = 5A

= 3A = 5A

1.00

1.15 175

300

1.20

1.30 200

350

V V

mV mV

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

Note 2: Unless otherwise specified V

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

= V

OUT

. For the adjustable device V

SENSE

ADJ

= 0V.

Note 3: The dropout voltage for the AMS1505V is caused by either minimum control voltage or minimum power voltage. The specifications represent the

minimum input/output voltage required to maintain within 1% regulation.

Note 4: For the adjustable device the minimum load current is the minimum current required to maintain regulation. Normally the current in the resistor

divider used to set the output voltage is selected to meet the minimum load current requirement.

Note 5: The control pin current is the drive current required for the output transistor. This current will track output current with a ratio of about 1:100. The

minimum value is equal to the quiescent current of the device.

PIN FUNCTIONS

Sense (Pin 1): This pin is the positive side of the reference

voltage

for the device. With this pin it is possible to Kelvin

sense the output voltage at the load.

s the negative side of

Adjust/Ground (Pin 2): Thi

s pin i the reference voltage for the device. Adding a small bypass capacitor from the Adjust pin to ground improves the transient response.

s is

Output (Pin 3): Thi

the power output of the device.

CONTROL

control circuitry of the device. The current flow into this pin will be about 1% of the output current. The voltage at this pin must be 1.3V or greater than the output voltage for the device to regulate.

POWER

device of the AMS1505V. The output load current is supplied through this pin. The voltage at this pin must be between 0.1V and 0.35V greater than the output voltage for the device to regulate.

(Pin 4): This pin is the supply pin for the

(Pin 5): This pin is the collector to the power

+ 5 hidden pages

Advanced Monolithic Systems AMS1505V Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

ORDERING INFORMATION:

PIN CONNECTIONS