ADVANCED Monolithic System AMS3102 Service Manual

Advanced AMS3102
Monolithic 300mA LOW DROPOUT VOLTAGE REGULATOR
Systems

FEATURES APPLICATIONS

•• Fixed and Adjustable Versions Available •• Cellular Telephones

•• Output Current in excess of 300mA •• Portable Consumer Equipment

•• Very Low Quiescent Current •• Portable (Notebook) Computers

•• Reverse Battery Protection •• Battery Powered Systems

•• Input-output Differential less than 0.6V •• Portable Instrumentation

•• Short Circuit Protection •• Radio Control Systems

•• Internal Thermal Overload Protection •• CD/DVD drives

•• Load Dump Protection

•• Overvoltage Protection

•• Mirror Image Insertion Protection

•• ON/OFF Pin

••External PNP Drive

GENERAL DESCRIPTION

The AMS3102 series consists of positive fixed and adjustable voltage regulators ideally suited for use in battery-powered
systems. These devices feature very low quiescent current of 0.3mA or less when supplying 10mA loads. This unique
characteristic and the extremely low input-output differential required for proper regulation (0.25V for output currents of
100mA) make the AMS3102 ideal to use for standby power systems.

Internal circuitry of AMS3102 is protected from input fault conditions caused by reverse battery installation or input voltages
that exceed maximum rated input voltage. During line transients, such as load dump (40V) when the input voltage to the
regulator can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to
protect both internal circuits and the load. The AMS3102 series also includes internal current limiting, thermal shutdown,
and is able to withstand temporary power-up with mirror-image insertion.

The AMS3102 is offered in the 3-pin TO-92 package, SOT-89, 3 lead SOT-23, 5 lead SOT-23 and 8 lead SOIC packages.
The device is provided with On/Off pin in SOT-23 5L and in 8 lead SOIC package.

ORDERING INFORMATION

OUTPUT PACKAGE TYPE TEMP.

VOLTAGE

FIXED AMS3102AN-X AMS3102AL-X (R) AMS3102AM-X AMS3102AM1-X AMS3102AS-X IND

ADJ. AMS3102CM1 AMS3102CS IND
X = 2.0V, 2.5V, 3.0V, 3.3V, 3.5V, 4.0V, 5.0V.
R = Reverse pin-out option

TO-92 SOT-89 3L SOT-23 5L SOT-23 SO-8

AMS3102N-X AMS3102L-X (R) AMS3102M-X AMS3102M1-X AMS3102S-X IND

RANGE

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

AMS3102

ABSOLUTE MAXIMUM RATINGS (Note 1)

Input Voltage Maximum Junction Temperature
Operating 21V Storage Temperature

-65°C to +150°C

Overvoltage Protection 24V to 40V Lead Temperature (Soldering 10 sec)
Internal Power Dissipation (Note 4) Internally Limited ESD 2000V

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at V

+1V, IO =10mA, TJ=25°C, C2 = 22µF unless otherwise specified.

IN =VO

+125°C

230°C

PARAMETER CONDITIONS

AMS3102A-X

Min. Typ. Max.

Fixed Output Voltage Versions

Output Voltage Tolerance -1.0 +1.0 -3.0 +3.0 %

(VIN+1V) ≤VIN ≤21V, IO=100 mA

-40°C ≤T

Line Regulation

Load Regulation

Dropout Voltage I

Quiescent Current

Output Noise Voltage
Output Impedance 100mADC and 10mA
Ripple Rejection fO =120Hz 55 80 80 dB
Maximum Operational Input

Voltage
Maximum Line Transient

Reverse Polarity Input Voltage,
D/C

Reverse Polarity Input Voltage,
Transient

(VIN+1V) ≤VIN ≤ 15V
9V ≤VIN ≤ 21V

5mA ≤I
5mA ≤10 ≤ 200 mA

O

I

O

I

O

I

O

I

O

10Hz-100kHz, C

RL = 500Ω, VO ≤ 5.5V
T = 1ms, τ ≤100ms

RL = 500Ω, T = 1ms, τ ≤100ms

≤125°C

J

≤ 100 mA

O

= 100 mA
= 200 mA

≤ 10 mA,
= 100 mA
≤ 200 mA (Note 5)

OUT

= 100µF

,100Hz=10kHz 200 200

rms

- 3.0 + 3.0

5
8

30
50

0.25

0.5

0.3
3
9

500 500

21 22 21 22 V

35 40 35 40 V

-35 -40 -35 -40 V

-35 -40 -35 -40 V

10
30

50
70

0.3

0.6

0.5
4

12

AMS3102-X

Min. Typ. Max.

±± 5.0

5
8

30
50

0.3

0.5

0.3
3
9

10
30

50
70

0.4

0.6

0.5
4

12

Units

%

mV
mV

mV
mV

mV
mV

mA
mA
mA

µV rms

mΩ

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

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at V

=6V, V

IN

=3V IO =10mA, TJ=25°C, R1 =27k, C2 = 2µF unless otherwise specified.

OUT

AMS3102

PARAMETER CONDITIONS

(Note 2)

Min.

AMS3102C

Typ.

Max.

Units

Adjustable Version

Reference Voltage

IO ≤ 100 mA, -40°C ≤T
Measured from V

to Adjust Pin

OUT

≤ 125°C, R1=27k,

J

1.210 1.235 1.26 V

1.20 1.235 1.270

V

Output Voltage Range 2 20 V
Line Regulation
Load Regulation

V

+ 1V ≤VIN ≤ 21V

OUT

5mA ≤IO ≤ 100 mA
5mA ≤IO ≤ 200 mA

Dropout Voltage

Quiescent Current I

I

≤ 10 mA

O

I

= 100 mA

O

I

= 200 mA (Note 5)

O

= 10 mA

O

I

= 100 mA

O

During Shutdown RL = 500Ω
Output Noise Voltage 10Hz-100kHz 100
Output Impedance 100mADC and 10mA

,100Hz=10kHz 40 200

rms

.02 1.5 mV/V

0.3
1

0.05

0.3

0.5

0.3
3

0.3

0.2

0.4

0.6

0.5

0.5

1
2

%
%

V
V
V

mA

4

mA
mA

µV

rms

mΩ

/V

Long Term Stability T =1000hr 0.4 %/1000hr
Ripple Rejection fO = 120Hz 0.02 dB
Maximum Operational Input

21 22 V

Voltage
Maximum Line Transient

IO = 10mA, Reference Voltage ≤ 1.5V

35 40 V

T = 1ms, τ ≤100ms

Reverse Polarity Input Voltage,

RL = 500Ω, VO ≥ -0.3V

-35 -40 V

D/C
Reverse Polarity Input Voltage,

RL = 500Ω, T = 1ms, τ ≤100ms

-35 -40 V

Transient
On/Off Threshold Voltage
On
Off
On/Off Threshold Current V

VO = 3V

1.8

2.5

= 2.4V 35 60

OFF

2.0

1.5 V
V

µA

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: To ensure constant junction temperature, low duty cycle pulse testing is used.
Note 3: Limits appearing in boldface type apply over the entire junction temperature range for operation. Limits appearing in normal type apply for

TA = TJ = 25°C.
Note 4: The maximum allowable power dissipation is a function of the maximum junction temperature TJ(MAX), the junction-to ambient thermal resistance θ

J-A

the ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is calculated using:

P(MAX)θ=

AJ T-(MAX)T

A-J

Where the value of the junction-to-ambient thermal resistance are as follows: 195°C/W for the TO-92 (N) package, 110°C/W for SOT-89 (L), 220°C/W for 5 lead
SOT-23 (M1) and 160°C/W for the molded plastic SO-8 (S).

Note 5: Dropout Voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V differential.

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

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