ADMOS AMS1505CTV-5.0, AMS1505CTV-3.5, AMS1505CTV-3.3, AMS1505CTV-3.0, AMS1505CTV-2.85 Datasheet

Advanced AMS1505V
Monolithic 5A ULTRA LOW DROPOUT VOLTAGE REGULATORS

Systems

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

•• 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.

•• Post Regulators for Switching Supplies

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

ORDERING INFORMATION:

PACKAGE TYPE OPERATING

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

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

PIN CONNECTIONS

5 LEAD TO-220

5
4
3
2
1

FRONT VIEW

5 LEAD TO-263

5
4
3
2
1

FRONT VIEW

Vpower
Vcontrol
OUTPUT
ADJUST/GND
SENSE

V

POWER

V

CONTROL

OUTPUT

ADJUST/GND

SENSE

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

AMS1505V

Junction Temperature Range

ABSOLUTE MAXIMUM RATINGS (Note 1)

V

Input Voltage 7V Soldering information

POWER

V
Operating
Control Section
Power Transistor
Storage temperature

CONTROL

Input Voltage 13V Lead Temperature (10 sec)

Thermal 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

can vary from 20°C/W to >40°C/W

JA

300°C

ϕ JA= 50°C/W

ϕ JA= 30°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.

LOAD

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 AMS1505V/-1.5/-2.5/

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

Minimum Load

AMS1505V V

= 2.75V, V

CONTROL

V

= 2.7V to 12V, V

CONTROL

I

= 10mA to 5A

LOAD

= 4V, V

CONTROL

V

= 3V, V

CONTROL

= 5V, V

CONTROL

V

= 4V, V

CONTROL

= 5.35V, V

CONTROL

V

= 4.4V, V

CONTROL

= 5.5V, V

CONTROL

V

= 4.5V, V

CONTROL

= 5.8V, V

CONTROL

V

= 4.8V, V

CONTROL

= 6V, V

CONTROL

V

= 5V, V

CONTROL

= 7.5V, V

CONTROL

V

= 6.5V, V

CONTROL

I

= 10 mA , 1.5V≤ (V

LOAD

0.8V≤ (V

POWER

V

= V

CONTROL

I

= 10mA to 5A

LOAD

= 5V, V

CONTROL

POWER
POWER

POWER
POWER

POWER
POWER

- V
+ 2.5V, V

OUT

POWER

POWER

POWER

POWER

POWER
POWER

POWER
POWER

POWER
POWER

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
=4.3V, I

=5.5V, I
=5.8V, I

CONTROL

) ≤ 5.5V

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

LOAD

= 0mA to 5A

LOAD

= 0mA

LOAD

= 0mA to 5A

LOAD

- V

) ≤ 12V

OUT

=V

+ 0.8V,

OUT

= 0V (Note 3)

ADJ

1.238 1.250 1.262 V

1.485 1.500 1.515 V

2.475 2.500 2.525 V

2.833 2.850 2.867 V

2.970 3.000 3.030 V

3.235 3.300 3.333 V

3.430 3.500 3.535 V

4.950 5.000 5.030 V

1 3

1 5

5 10

mV

mV

mA

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

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

V

CONTROL

I

= 10mA to 5A

LOAD

V

CONTROL

I

= 10mA to 5A

LOAD

CONTROL

V

CONTROL

I

= 2A

LOAD

= V

+ 2.5V, V

OUT

= V

+ 2.5V, V

OUT

= 2.75V, V
= V

POWER

= V

POWER

OUT

=V

POWER

=V

POWER

= 2.05V, I
+ 2.5V, V

OUT

OUT

LOAD

RIPPLE

+ 0.8V,

+ 0.8V,

= 10mA
= 1V

50 85

6 10

50 120

P-P

60 80 dB

mA

mA

µA

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

Junction-to-Case

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

0.65/2.70

0.65/2.70

°C/W
°C/W

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

AMS1505V

CONTROL

POWER

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

Control Dropout
(V

Power Dropout
(V

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

CONTROL

POWER

- V

- V

OUT

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

V

POWER

V

POWER

V

CONTROL

V

CONTROL

=V
=V

=V
=V

OUT

OUT

OUT

OUT

+ 0.8V, I
+ 0.8V, I

+ 2.5V, I
+ 2.5V, I

LOAD

LOAD

LOAD

LOAD

= 10mA
= 5A

= 3A
= 5A

1.00

1.15
175

300

1.20

1.30
200

350

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: Unless otherwise specified V

OUT

= V

. 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.

Adjust/Ground (Pin 2): This pin is the negative side of
the reference voltage for the device. Adding a small
bypass capacitor from the Adjust pin to ground improves
the transient response.

Output (Pin 3): This is the power output of the device.

V

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

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.

V

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

V
V

mV
mV

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