Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
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
TO-92
SOT-89
3L SOT-23
5L SOT-23
SO-8
RANGE
FIXED
AMS3102AN-X
AMS3102AL-X (R)
AMS3102AM-X
AMS3102AM1-X
AMS3102AS-X
IND
AMS3102N-X
AMS3102L-X (R)
AMS3102M-X
AMS3102M1-X
AMS3102S-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
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS3102
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Voltage
Maximum Junction Temperature
+125
C
Operating
21V
Storage Temperature
-65
C to +150
C
Overvoltage Protection
24V to 40V
Lead Temperature (Soldering 10 sec)
230
C
Internal Power Dissipation (Note 4)
Internally Limited
ESD
2000V
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at V
IN
=V
O
+1V, I
O
=10mA, T
J
=25C, C2 = 22
F unless otherwise specified.
PARAMETER
CONDITIONS
AMS3102A-X
Min. Typ. Max.
AMS3102-X
Min. Typ. Max.
Units
Fixed Output Voltage Versions
Output Voltage Tolerance
-1.0
+1.0
-3.0
+3.0
%
(V
IN
+1V)
V
IN
21V, I
O
=100 mA
-40
C
T
J
125
C
- 3.0
+ 3.0
5.0
%
Line Regulation
(V
IN
+1V)
V
IN
15V
9V
V
IN
21V
5
8
10
30
5
8
10
30
mV
mV
Load Regulation
5mA
I
O
100 mA
5mA
10
200 mA
30
50
50
70
30
50
50
70
mV
mV
Dropout Voltage
I
O
= 100 mA
I
O
= 200 mA
0.25
0.5
0.3
0.6
0.3
0.5
0.4
0.6
mV
mV
Quiescent Current
I
O
10 mA,
I
O
= 100 mA
I
O
200 mA (Note 5)
0.3
3
9
0.5
4
12
0.3
3
9
0.5
4
12
mA
mA
mA
Output Noise Voltage
10Hz-100kHz, C
OUT
= 100
F
500
500
V rms
Output Impedance
100mA
DC
and 10mA
rms
,100Hz=10kHz
200
200
m
Ripple Rejection
f
O
=120Hz
55
80
80
dB
Maximum Operational Input
Voltage
21
22
21
22
V
Maximum Line Transient
R
L
= 500
, V
O
5.5V
T = 1ms,
100ms
35
40
35
40
V
Reverse Polarity Input Voltage,
D/C
-35
-40
-35
-40
V
Reverse Polarity Input Voltage,
Transient
R
L
= 500
, T = 1ms,
100ms
-35
-40
-35
-40
V
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS3102
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at V
IN
=6V, V
OUT
=3V I
O
=10mA, T
J
=25C, R1 =27k, C2 = 2
F unless otherwise specified.
PARAMETER
CONDITIONS
(Note 2)
Min.
AMS3102C
Typ.
Max.
Units
Adjustable Version
Reference Voltage
1.210
1.235
1.26
V
I
O
100 mA, -40
C
T
J
125
C, R1=27k,
Measured from V
OUT
to Adjust Pin
1.20
1.235
1.270
V
Output Voltage Range
2
20
V
Line Regulation
V
OUT
+ 1V
V
IN
21V
.02
1.5
mV/V
Load Regulation
5mA
I
O
100 mA
5mA
I
O
200 mA
0.3
1
1
2
%
%
Dropout Voltage
I
O
10 mA
I
O
= 100 mA
I
O
= 200 mA (Note 5)
0.05
0.3
0.5
0.2
0.4
0.6
V
V
V
Quiescent Current
I
O
= 10 mA
I
O
= 100 mA
During Shutdown R
L
= 500
0.3
3
0.3
0.5
4
0.5
mA
mA
mA
Output Noise Voltage
10Hz-100kHz
100
V
rms
/V
Output Impedance
100mA
DC
and 10mA
rms
,100Hz=10kHz
40
200
m
Long Term Stability
T =1000hr
0.4
%/1000hr
Ripple Rejection
f
O
= 120Hz
0.02
dB
Maximum Operational Input
Voltage
21
22
V
Maximum Line Transient
I
O
= 10mA, Reference Voltage
1.5V
T = 1ms,
100ms
35
40
V
Reverse Polarity Input Voltage,
D/C
R
L
= 500
, V
O
-0.3V
-35
-40
V
Reverse Polarity Input Voltage,
Transient
R
L
= 500
, T = 1ms,
100ms
-35
-40
V
On/Off Threshold Voltage
On
Off
V
O
= 3V
2.5
1.8
2.0
1.5
V
V
On/Off Threshold Current
V
OFF
= 2.4V
35
60
A
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
T
A
= T
J
= 25
C.
Note 4: The maximum allowable power dissipation is a function of the maximum junction temperature T
J
(MAX), the junction-to ambient thermal resistance
J-A
and
the ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is calculated using:
A
-
J
A
J
T
-
(MAX)
T
P(MAX)
=
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 (925) 556-9090 Fax (925) 556-9140
AMS3102
PIN CONNECTIONS
TO-92
Plastic Package (N)
SOT-89
(L)
SOT-89
(L)
R = Reverse pin-out
OUTPUT
INPUT
GND
1
2
3
OUTPUT
GND
INPUT
1
2
3
INPUT
GND
OUTPUT
Bottom View
Top View
Top View
3 Lead SOT-23
(M)
5 Lead SOT-23
(M1)
8L SOIC
SO-Package (S)
INPUT
OUTPUT
GND
INPUT
OUTPUT
ON/OFF
ADJ / N/C
GROUND
1
2
5
3
4
ON/OFF
N/C
OUTPUT
ADJ
N/C
INPUT
GROUND
GROUND
GROUND
GROUND
1
2
8
4
3
7
5
6
Top View
Top View
Top View
TYPICAL PERFORMANCE CHARACTERISTICS
6.0
Low Voltage Behavior
2.0
3.0
4.0
5.0
INPUT VOLTAGE (V)
AMS3102-3.3
2.0
3.0
4.0
5.0
6.0
0
I
O
= 100mA
0
40
80
0
0.6
0.4
0.2
Dropout Voltage
120
JUNCTION TEMPERATURE ( C)
INPUT OUTPUT DIFFERENTIAL (V)
0.1
0.5
0.3
I
O
= 100mA
0
150
0
0.6
0.4
0.2
Dropout Voltage
300
OUTPUT CURRENT (mA)
INPUT OUTPUT DIFFERENTIAL (V)
0.1
0.5
0.3
OUTPUT VOLTAGE (V)
I
O
= 150mA
I
O
= 200mA
200
250
100
50
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS3102
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
0
10
20
0
600
400
200
Peak Output Current
30
INPUT VOLTAGE (V)
OUTPUT CURRENT (
m
A)
100
500
300
T
J
= 25C
-40
40
80
120
25
10
QUIESCENT CURRENT (mA)
Quiescent Current
TEMPERATURE ( C)
15
2
0
0
0
100
200
0
8
4
Quiescent Current
300
OUTPUT CURRENT (mA)
QUIESCENT CURRENT (mA)
2
10
6
-1
1
3
6
-20 -10
0
10
20
30
40
50
60
INPUT VOLTAGE (V)
Output at Voltage Extremes
OUTPUT VOLTAGE (V)
0
2
5
4
~
~
~
~
V
IN
= 6V
20
3
1
I
O
= 50mA
I
O
= 0mA
AMS3102-3.3
R
L
=500m
50
150
250
350
-2.5
2.5
10
5.0
17.5
0
1
2
4
5
6
7
8
10
INPUT VOLTAGE (V)
Quiescent Current
QUIESCENT CURRENT (
A)
0
7.5
15
12.5
I
O
= 100 mA
45
55
70
60
85
1
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
Ripple Rejection
RIPPLE REJECTION (dB)
50
65
80
75
C2 = 100
F
ALUM
I
O
= 10mA
C2 = 100
F
TANTALUM
3
9
3.3V OUTPUT
I
O
= 100mA
I
O
= 200mA
FREQUENCY (Hz)
OUTPUT IMPEDANCE (
)
0.01
10
Output Impedance
10k
1M
1
100
0.1
1
Operation During Load Dump
TIME (ms)
OUTPUT
VOLTAGE (V)
=150
ms
-100
0
100
200
300
400
500
0
1
4
0
10
50
70
C
O
= 100
F
1.20
1.30
Reference Voltage
1.12
1.14
1.16
1.18
1.22
1.24
1.26
1.28
OUTPUT VOLTAGE (V)
REFERENCE VOLTAGE (V)
3
6
9
12
15
18
21
24
0
1.10
~
~
AMS3102C
ADJUSTABLE
INPUT
VOLTAGE (V)
1k
10
100k
2
3
~
~
40
30
20
60
R
L
= 500
I
O
= 10mA
5
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS3102
APPLICATION NOTES
Definition of Terms
Dropout Voltage
: The input-output voltage differential at which
the circuit stops to regulate against further reduction in input
voltage. Measured when the output voltage has dropped 100mV
from the nominal voltage obtained at 1V input, dropout voltage is
dependent upon load current and junction temperature.
Input Voltage
: The DC voltage applied to the input terminal
with respect to ground.
Input-Output Differential
: The voltage difference between the
unregulated input voltage and the regulated output voltage for
which the regulator will regulate.
Line Regulation
: The change in output voltage for a change in
the input voltage. The line regulation is measured under
conditions of low dissipation or by using low duty cycle pulse
testing such that the average chip temperature is not significantly
affected.
Load Regulation
: The change in output voltage for a change in
load current at constant chip temperature.
Long term stability
: Output voltage stability under accelerated
life-test conditions after 1000 hours with maximum rated voltage
and junction temperature.
Output Noise Voltage
: The rms AC voltage at the output, with
constant load and no input ripple, measured over a specified
frequency range.
Quiescent Current
: That part of the positive input current that
does not contribute to the positive load current. The regulator
ground lead current.
Ripple Rejection
: The ratio of the peak-to peak input ripple
voltage to the peak-to-peak output ripple voltage at specified
frequency.
Temperature Stability of V
O
: The percentage change in output
voltage for a thermal variation from room temperature to either
temperature extreme.
External capacitor
The AMS3102 series require an output capacitor of 2.2
F or
greater to ensure device stability. Without the capacitor the
device may oscillate.
Most type of tantalum or electrolytic capacitor can be used in the
applications. A critical characteristic of the capacitors is an ESR
value of 5
or less and a resonant frequency above 500kHz. The
value of this capacitor can be increased without limits.
For higher loads, the value of the capacitor should be increased,
specially when the output voltage is set for 2.5V or less. The
AMS3102 lowest fixed output voltage value is 2.0V.
Typical application circuit (adjustable output)
R
2
ADJ
+
AMS3102
ADJUSTABLE
GND
C1
22
F
10
F
OUT
OFF
ON
ON/OFF
R
1
28k
V
OUT
V
IN
100k
Minimum Load
In circuits using the fixed output voltage versions, minimum load
is not required. For circuits using the adjustable device, the value
of R1 and R2 should be chosen such, that a current of
approximately 40
A flows through the network. The reference
voltage (1.235V) is measured between the adjust pin and V
OUT
.
The output voltage can be set by the two resistors R1 and R2
using the following equation:
+
=
R1
R2
R1
V
V
REF
O
The value of R1 is recommended to be between 25k
to 30 k
,
and the value of R2 will set the output voltage.
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS3102
PACKAGE DIMENSIONS
inches (millimeters) unless otherwise noted.
3L TO-92 PLASTIC PACKAGE (N)
5 LEAD SOT-23 PLASTIC PACKAGE (M1)
0.1400.010
(3.5560.127)
0.0600.010
(1.5240.254)
0.0150.002
(0.3810.051)
0.0160.003
(0.4060.076)
0.0500.005
(1.2700.127)
0.0600.005
(1.5240.127)
DIA
0.1800.005
(4.5720.127)
0.1800.005
(4.5720.127)
0.050
(1.270)
MAX
0.500
(12.70)
MIN
UNCONTROLLED
LEAD DIMENSIONS
10
NOM
5 NOM
N (TO-92 ) AMS DRW# 042391
0.90
(2.286)
NOM
0.059-0.070
(1.50-1.75)
0.014-0.020
(0.350-0.50)
0.110-0.120
(2.794-3.048)
0.102-0.118
(2.60-3.00)
0.037
(0.95)
TYP
0.075
(1.90)
TYP
0.018-0.024
(0.457-0.610)
10
NOM
0.0035-0.0080
(0.090-0.20)
(SOT-23-5 ) AMS DRW# 051001
0.036-0.051
(0.090-1.30)
0.003
(0.150)
MAX
0.018-0.024
(0.457-0.610)
10
NOM
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS3102
PACKAGE DIMENSIONS
inches (millimeters) unless otherwise noted (Continued).
SOT-89 PLASTIC PACKAGE (L)
8 LEAD SOIC PLASTIC PACKAGE (S)
0.090-0.102
(2.29-2.60)
0.173-0.181
(4.40-4.60)
0.064-0.072
(1.62-1.83)
0.155-0.167
(3.94-4.25)
0.059
(1.50)
BSC
0.035-0.047
(0.89-1.20)
L (SOT-89 ) AMS DRW# 042392
0.118
(3.00)
BSC
0.014-0.019
(0.36-0.48)
0.017-0.022
(0.44-0.56)
0.084-0.090
(2.13-2.29)
0.055-0.063
(1.40-1.60)
0.014-0.017
(0.35-0.44)
0-8 TYP
0.010-0.020
(0.254-0.508)
S (SO-8 ) AMS DRW# 042293
x 45
0.016-0.050
(0.406-1.270)
0.008-0.010
(0.203-0.254)
0.004-0.010
(0.101-0.254)
0.014-0.019
(0.355-0.483)
0.053-0.069
(1.346-1.752)
0.050
(1.270)
TYP
0.150-0.157**
(3.810-3.988)
0.228-0.244
(5.791-6.197)
0.189-0.197*
(4.801-5.004)
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
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