Advanced
Monolithic
Systems
FEATURES
•
Fixed and Adjustable Versions Available
•
Output Current in excess of 300mA
•
Very Low Quiescent Current
•
Reverse Battery Protection
•
Input-output Differential less than 0.6V
•
Short Circuit Protection
•
Internal Thermal Overload Protection
•
Load Dump Protection
•
Overvoltage Protection
•
Mirror Image Insertion Protection
•
ON/OFF Pin
•External
PNP Drive
AMS3102
300mA LOW DROPOUT VOLTAGE REGULATOR
RoHS compliant
APPLICATIONS
•
Cellular Telephones
•
Portable Consumer Equipment
•
Portable (Notebook) Computers
•
Battery Powered Systems
•
Portable Instrumentation
•
Radio Control Systems
•
CD/DVD drives
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
VOLTAGE
FIXED
TO-92
AMS3102AN-X
AMS3102N-X
SOT-89
AMS3102AL-X
AMS3102L-X
AMS3102ALR-X
AMS3102LR-X
PACKAGE TYPE
3L SOT-23
AMS3102AM-X
AMS3102M-X
5L SOT-23
AMS3102AM1-X
AMS3102M1-X
SO-8
AMS3102AS-X
AMS3102S-X
TEMP.
RANGE
IND
IND
ADJ.
X = 2.0V, 2.5V, 3.0V, 3.3V, 3.5V, 4.0V, 5.0V.
R = Reverse pin-out option
AMS3102CM1
AMS3102CS
IND
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS3102
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Voltage
Operating
Overvoltage Protection
Internal Power Dissipation (Note 4)
21V
24V to 40V
Internally Limited
Maximum Junction Temperature
+125°C
Storage Temperature
-65°C to +150°C
Lead Temperature (Soldering 25 sec)
265°C
ESD
2000V
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at V
IN
=V
O
+1V, I
O
=10mA, T
J
=25°C, C2 = 22µF unless otherwise specified.
PARAMETER
Fixed Output Voltage Versions
Output Voltage Tolerance
(V
IN
+1V)
≤V ≤21V,
I
O
=100 mA
-40°C
≤T ≤125°C
J
IN
CONDITIONS
AMS3102A-X
Min.
Typ.
Max.
-1.0
- 3.0
5
8
30
50
0.25
0.5
0.3
3
9
500
200
55
21
80
22
40
-40
-40
+1.0
+ 3.0
10
30
50
70
0.3
0.6
0.5
4
12
AMS3102-X
Min.
Typ.
Max.
-3.0
±
5.0
5
8
30
50
0.3
0.5
0.3
3
9
500
200
80
21
35
-35
-35
22
40
-40
-40
10
30
50
70
0.4
0.6
0.5
4
12
+3.0
Units
%
%
mV
mV
mV
mV
mV
mV
mA
mA
mA
µV
rms
mΩ
dB
V
V
V
V
Line Regulation
(V
IN
+1V)
≤V ≤
15V
9V
≤V ≤
21V
IN
O
IN
Load Regulation
Dropout Voltage
5mA
≤I ≤
100 mA
5mA
≤10 ≤
200 mA
I = 100 mA
O
O
O
O
O
I = 200 mA
Quiescent Current
I
≤
10 mA,
I = 100 mA
I
≤
200 mA (Note 5)
Output Noise Voltage
Output Impedance
Ripple Rejection
Maximum Operational Input
Voltage
Maximum Line Transient
Reverse Polarity Input Voltage,
D/C
Reverse Polarity Input Voltage,
Transient
R
L
= 500Ω, T = 1ms,
τ ≤100ms
R
L
= 500Ω, V
O
≤
5.5V
T = 1ms,
τ ≤100ms
-35
-35
10Hz-100kHz, C
OUT
= 100µF
100mA
DC
and 10mA
rms
,100Hz=10kHz
f
O
=120Hz
35
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS3102
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at V
IN
=6V, V
OUT
=3V I
O
=10mA, T
J
=25°C, R1 =27k, C2 = 2µF unless otherwise specified.
PARAMETER
Adjustable Version
Reference Voltage
I
O
≤
100 mA, -40°C
≤T ≤
125°C, R1=27k,
J
CONDITIONS
(Note 2)
Min.
1.210
AMS3102C
Typ.
1.235
1.235
Units
Max.
1.26
1.270
20
V
V
V
mV/V
%
%
V
V
V
mA
mA
mA
µV
rms
/V
200
mΩ
%/1000hr
dB
V
V
V
V
Measured from V
OUT
to Adjust Pin
Output Voltage Range
Line Regulation
Load Regulation
V
OUT
+ 1V
≤V ≤
21V
IN
1.20
2
.02
0.3
1
0.05
0.3
0.5
0.3
3
0.3
100
40
0.4
0.02
21
22
40
-40
-40
1.5
1
2
0.2
0.4
0.6
0.5
4
0.5
5mA
≤I ≤
100 mA
5mA
≤I ≤
200 mA
O
O
Dropout Voltage
I
≤
10 mA
O
O
O
O
O
I = 100 mA
I = 200 mA (Note 5)
Quiescent Current
I = 10 mA
I = 100 mA
During Shutdown R
L
= 500Ω
Output Noise Voltage
Output Impedance
Long Term Stability
Ripple Rejection
Maximum Operational Input
Voltage
Maximum Line Transient
Reverse Polarity Input Voltage,
D/C
Reverse Polarity Input Voltage,
Transient
On/Off Threshold Voltage
On
Off
On/Off Threshold Current
V
OFF
= 2.4V
2.5
I
O
= 10mA, Reference Voltage
≤
1.5V
T = 1ms,
τ ≤100ms
R
L
= 500Ω, V
O
≥
-0.3V
R
L
= 500Ω, T = 1ms,
τ ≤100ms
V
O
= 3V
-35
-35
10Hz-100kHz
100mA
DC
and 10mA
rms
,100Hz=10kHz
T =1000hr
f
O
= 120Hz
35
1.8
2.0
35
1.5
60
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
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
θ
J-A
and the ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is calculated using:
P(MAX)
=
T
J
(MAX) - T
A
θ
J - A
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.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS3102
PIN CONNECTIONS
TO-92
Plastic Package (N)
OUTPUT
SOT-89
(L)
SOT-89
(L)
R =
Reverse pin-out
INPUT
GND
1
INPUT
2
GND
3
OUTPUT
1
2
3
INPUT
OUTPUT GND
Bottom View
Top View
Top View
3 Lead SOT-23
(M)
GND
5 Lead SOT-23
(M1)
8L SOIC
SO-Package (S)
INPUT
1
GROUND
2
ON/OFF
3
5
OUTPUT
OUTPUT
1
GROUND
2
8
INPUT
7
GROUND
6
GROUND
5
ON/OFF
N/C
4
ADJ / N/C
INPUT
OUTPUT
GROUND
3
ADJ
4
N/C
Top View
Top View
Top View
TYPICAL PERFORMANCE CHARACTERISTICS
Dropout Voltage
Dropout Voltage
Low Voltage Behavior
6.0
AMS3102-3.3
I
O
= 100mA
INPUT OUTPUT DIFFERENTIAL (V)
OUTPUT VOLTAGE (V)
0
50 100 150 200 250
OUTPUT CURRENT (mA)
300
0.5
0.4
0.3
0.2
0.1
0
0
80
120
40
JUNCTION TEMPERATURE (° C)
I
O
= 150mA
I
O
= 100mA
I
O
= 200mA
INPUT OUTPUT DIFFERENTIAL (V)
0.6
0.6
0.5
0.4
0.3
0.2
0.1
0
5.0
4.0
3.0
2.0
0
2.0
3.0
4.0
5.0
6.0
INPUT VOLTAGE (V)
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS3102
TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
Output at Voltage Extremes
6
OUTPUT CURRENT (mA)
5
OUTPUT VOLTAGE (V)
4
3
2
1
0
-1
-20 -10
0 10 20 30 40 50 60
INPUT VOLTAGE (V)
AMS3102-3.3
R
L
=500mΩ
Peak Output Current
600
RIPPLE REJECTION (dB)
500
T
J
= 25°C
Ripple Rejection
85
80
75
70
65
60
55
50
45
1
I
O
= 10mA
C2 = 100µF
ALUM
C2 = 100µF
TANTALUM
400
300
200
100
0
0
20
10
INPUT VOLTAGE (V)
30
10
100 1k 10k 100k 1M
FREQUENCY (Hz)
Quiescent Current
17.5
QUIESCENT CURRENT (mA)
15
12.5
10
7.5
5.0
2.5
0
-2.5
0
1
2 3 4 5 6 7 8
INPUT VOLTAGE (V)
9 10
3.3V OUTPUT
I
O
= 100mA
Quiescent Current
25
QUIESCENT CURRENT (mA)
10
8
6
4
2
0
0
50 100 150 200 250 300 350
OUTPUT CURRENT (mA)
V
IN
= 6V
Quiescent Current
QUIESCENT CURRENT (µA)
20
15
I
O
= 200mA
10
3
2
1
~
~
I
O
= 100mA
I
O
= 50mA
I
O
= 0mA
~
~
0
-40
0
40
80
120
TEMPERATURE (° C)
Output Impedance
10
INPUT
VOLTAGE (V)
OUTPUT IMPEDANCE (Ω)
I
O
= 10mA
Operation During Load Dump
70
60
50
40
30
20
10
0
~
5
~
4
3
2
1
0
-100
1.30
REFERENCE VOLTAGE (V)
1.28
1.26
1.24
1.22
1.20
1.18
1.16
1.14
1.12
1.10
0
Reference Voltage
AMS3102C
ADJUSTABLE
1
τ =150
ms
OUTPUT
VOLTAGE (V)
0.1
C
O
= 100µF
R
L
= 500Ω
~
~
0.01
1
10
100
1k 10k 100k
FREQUENCY (Hz)
1M
0
100 200 300
TIME (ms)
400
500
3
6 9 12 15 18 21 24
OUTPUT VOLTAGE (V)
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
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