Advanced Monolithic Systems AMS3101 Service Manual

http://www.BDTIC.com/AMS

Advanced AMS3101

Monolithic 150mA LOW DROPOUT VOLTAGE REGULATOR
Systems

RoHS compliant

FEATURES APPLICATIONS

• 0.6V to 6V in 100mV increments Voltages Available • Battery Powered Systems

• Active High On/Off Control • Cellular Phones

• Output Current of 150mA • Cordless Telephones

• Quiescent Current of <1µA when in Shutdown • Portable (Notebook) Computers

• Low Dropout Voltage of 250mV at 150mA • Portable Instrumentation

• Wide Supply Voltage Range 1.5V to 15V • Portable Consumer Equipment

• Short Circuit and Thermal Protection • Personal Communication Equipment

• Power Good function option • Radio Control Systems

• Ceramic Output Capacitor OK • Low Voltage Systems

• Reference bypass for lower noise • MP3 Player

GENERAL DESCRIPTION

The AMS3101 is a 150mA low dropout fixed voltage regulator, featuring an internal electronic switch controlled by TTL or
CMOS logic levels. When the Enable pin is pulled to a logic high level, the device is in the ON state. Designed specifically for
battery powered applications where low quiescent current, low dropout and low standby current are required, the AMS3101 is
ideal to use in standby power systems. Like other regulators the AMS3101 series also includes internal current limiting and
thermal shutdown. A high precision 0.6V voltage reference enables the device to provide very low output voltages. A key
feature includes a reference bypass pin to improve its low-noise performance for fixed output versions.
Ideal for space critical applications, the AMS3101 is available in the 5-pin SOT-23 surface mount package and requires only a
10µF capacitor on the output for a minimum amount of external components. The Power Good option is used when the Output
Voltage drop must be detected. If the Output Voltage drops by approximately 15% of its nominal value, the open collector on
PG pin will pull down to Low state.

ORDERING INFORMATION

PIN CONNECTIONS

PACKAGE TYPE OPERATING TEMP.

5L SOT-23

AMS3101AM1-XXBP IND
AMS3101M1-XXBP IND
AMS3101AM1-XXPG IND
AMS3101M1-XXPG IND
AMS3101AM1-ADJ IND
AMS3101M1-ADJ IND

RANGE

XX =specify the output voltage required
PG=Power Good Open Collector pin
BP=Reference bypass pin for lower noise

Advanced Monolithic Systems, Inc.

5 Lead SOT-23

(M1)

FIXED VOLTAGE

Top View

5 Lead SOT-23

(M1)

FIXED VOLTAGE

Top View

5 Lead SOT-23

(M1)

ADJ VOLTAGE

Top View

http://www.BDTIC.com/AMS

AMS3101

ABSOLUTE MAXIMUM RATINGS (Note 1)

Input Voltage 16V Maximum Junction Temperature
Power Dissipation Internally limited Storage Temperature
Thermal Resistance
Operating Temperature Range

410°C/W

-40°C to +125°C

Lead Temperature (Soldering 25 sec)
ESD Rating 2kV

-65°C to +150°C

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at V

PARAMETER

Reference Voltage Adjustable device option 0.594 0.600 0.606 0.488 0.600 0.612 V

Output Voltage

(Fixed Output Version)

Line Regulation

=V

IN

OUT

CONDITIONS

1mA ≤I

V

≤ 150 mA

O

+1V ≤ VIN ≤ 15V

OUT

+1V, IO=1mA, CIN =10µF, C

AMS3101A-X AMS3101-X

Min. Typ. Max. Min. Typ. Max.

-1

-2

0.6 1 2 0.6 1 2 mV/V

= 22µF, V

OUT

1 2 -2

ON/OFF

= 2V unless otherwise specified.

2

-3.5

3.5

+150°C

265°C

Units

%

%

Load Regulation IL = 0.1mA to 150mA 0.1 0.4

0.8

Ground Pin Current I

Dropout Voltage I

Quiescent Current VEN ≤ 0.9V (shutdown)

Ripple Rejection

Output Noise Voltage

Short Circuit Current
Control Terminal Specifications (note 2)

On/Off Input Current

On/Off Input Voltage

Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. For guaranteed performance limits and associated test
conditions, see the Electrical Characteristics tables..
Note 2: The ON/OFF inputs must be properly driven to prevent possible misoperation.

= 0 mA

O

= 150 mA

I

O

= 150 mA 200 250 200 250 mV

O

V

≤ 0.8V (shutdown)

EN

= 0V

= 5V

OUT

=10µF

=10µF,

O

f = 1kHz, C

300Hz< f <50kHz, C

=0Ω

R

L

V

ON/OFF

V

ON/OFF

High = Output On

Low = Output Off

70

1.2

5 0.01 1 5 µA

75 75 dB

60 60

140 140 mA

0

5

1.3 1.25

0.9

100

1.5

-1

15

0.1 0.4

0.8

70

1.2

0

5

1.3 1.25

0.9

100

1.5

-1

15

mV/mA

µA

mA

µA

µV

µA

µA

V

V

Note 3: Limits appearing in boldface type apply over the entire junction temperature range for operation. Limits appearing in

normal type apply for T

= TJ = 25°C.

A

TYPICAL APPLICATION CIRCUIT

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