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Advanced
Monolithic
Systems
AMS3107
500mA LOW DROPOUT VOLTAGE REGULATOR
FEATURES
Fixed and Adjustable Versions Available
Output Current up to 500mA
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
APPLICATIONS
Cellular Telephones
Portable Consumer Equipment
Portable (Notebook) Computers
Battery Powered Systems
Portable Instrumentation
Radio Control Systems
CD/DVD drives
Automotive
GENERAL DESCRIPTION
The AMS3107 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 0.8mA or less when supplying 50mA loads. This unique
characteristic and the extremely low input-output differential required for proper regulation (0.2V for output currents of
100mA) make the AMS3107 ideal to use for standby power systems.
Internal circuitry of AMS3107 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 AMS3107 series also includes internal current limiting, thermal shutdown, and
is able to withstand temporary power-up with mirror-image insertion.
The AMS3107 is offered in 3 lead TO-92, 8 lead SOIC, SOT-89, SOT-223 and TO-252 packages.
ORDERING INFORMATION
OUTPUT
VOLTAGE
3L TO-92
SOT-89
FIXED AMS3107CN-X AMS3107CL-X
AMS3107N-X AMS3107L-X
ADJ.
X = 2.0V, 2.5V, 3.0V, 3.3V, 3.5V, 4.0V, 5.0V.
PACKAGE TYPE
TO-252
SOT-223
AMS3107CD-X AMS3107C-X
AMS3107D-X AMS3107-X
SO-8
AMS3107CS-X
AMS3107S-X
AMS3107S
TEMP.
RANGE
IND
IND
IND
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

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ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Voltage
Operating
25V
Overvoltage Protection
26V to 40V
Internal Power Dissipation (Note 4) Internally Limited
AMS3107
Maximum Junction Temperature
+125°C
Storage Temperature
-65°C to +150°C
Lead Temperature (Soldering 10 sec)
230°C
ESD 2000V
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at VIN =6.3V, IO =5mA, TJ=25°C, C2 = 22µF unless otherwise specified.
PARAMETER
Fixed Output Voltage Versions
Output Voltage Tolerance
CONDITIONS
AMS3107C-X
AMS3107-X
Min. Typ. Max. Min. Typ. Max.
-1.0
+1.0 -3.0
+3.0
6.3V
V
IN
25V,
IO=100
mA
- 3.0
+ 3.0
± 5.0
Line Regulation
Load Regulation
Dropout Voltage
Quiescent Current
Output Noise Voltage
Output Bypass Capacitor
6V V 15V
IN
15V V 25V
IN
5mA I 100 mA
O
5mA 10 200 mA
5mA 10 350 mA
5mA 10 500 mA
I = 100 mA
O
I = 200 mA
O
I = 350 mA
O
I = 500 mA
O
I 10 mA,
O
I = 100 mA
O
I 200 mA
O
I = 350 mA
O
10Hz-100kHz, COUT = 100µF
ESR=0.1 to 10
3 10
5 10
5 10
10 15
15 20
20 30
0.15 0.20
0.30 0.40
0.40 0.45
0.55 0.70
0.18 0.25
2 2.5
58
12
50
10
5 10
5 15
5 15
15 20
20 25
20 30
0.25 0.30
0.40 0.50
0.45 0.55
0.55 0.70
0.2 0.3
23
58
12
50
10
Ripple Rejection
Maximum Operational Input
Voltage
Maximum Line Transient
Reverse Polarity Input Voltage, D/C
Reverse Polarity Input Voltage,
Transient
fO =120Hz
RL = 500, VO 5.5V
T = 1ms, τ ≤100ms
RL = 500, T = 1ms, τ ≤100ms
55 80
25 28
35 40
-35 -40
-35 -40
80
25 28
35 40
-35 -40
-35 -40
Units
%
%
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mA
mA
mA
mA
µV rms
µF
dB
V
V
V
V
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

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AMS3107
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at VIN =6V, VOUT =3V IO =5mA, TJ=25°C, R1 =27k, C2 = 2µF unless otherwise specified.
PARAMETER
Adjustable Version
Reference Voltage
CONDITIONS
(Note 2)
IO
100
mA,
-40°C
T
J
125°C,
R1=27k, Measured from VOUT to Adj. Pin
Min.
1.210
1.20
AMS3107
Typ.
1.235
1.235
Max.
1.26
1.270
Output Voltage Range
Line Regulation
Load Regulation
Dropout Voltage
Quiescent Current
Output Noise Voltage
6V V 25V
IN
5mA I 100 mA
O
5mA 10 200 mA
5mA 10 350 mA
5mA 10 500 mA
I = 100 mA
O
I = 200 mA
O
I = 350 mA
O
I = 500 mA
O
I = 0 mA,
O
I = 100 mA
O
I = 200 mA
O
I = 350 mA
O
10Hz-100kHz
2 24
.02 1.5
0.3 0.5
0.5 1
1.0 1.5
1.0 2.0
0.05 0.2
0.3 0.4
0.5 0.6
0.5 0.7
0.18 0.3
2.0 2.5
5.0 8.0
12
100
Output Bypass Capacitor
ESR=0.1 to 10
10
Long Term Stability
T =1000hr
0.4
Ripple Rejection
fO = 120Hz
0.02
Maximum Operational Input
Voltage
21 22
Maximum Line Transient
IO = 10mA, Reference Voltage 1.5V
T = 1ms, τ ≤100ms
35
40
Reverse Polarity Input Voltage, D/C RL = 500, VO -0.3V
-35 -40
Reverse Polarity Input Voltage,
Transient
RL = 500, T = 1ms, τ ≤100ms
-35 -40
On/Off Threshold Voltage
On
Off
VO = 3V
1.8 1.5
2.5 2.0
On/Off Threshold Current
VOFF = 2.4V
35 60
Units
V
V
V
mV/V
%
%
%
%
V
V
V
V
mA
mA
mA
mA
µVrms/V
µF
%/1000hr
dB
V
V
V
V
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 θJ-A and the
ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is calculated using:
P(MAX) = TJ(MAX) - TA
θJ - A
Where the value of the junction-to-ambient thermal resistance are as follows: 195°C/W for TO-92 (N), 160°C/W for the SO-8 (S), 110°C/W for SOT-89 (L), 90°C/W
for SOT-223 and 80°C/W for TO-252.
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

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PIN CONNECTIONS
TO-92
Plastic Package (N)
OUTPUT
INPUT
GND
Bottom View
SOT-89
(L)
123
INPUT GND OUTPUT
Top View
AMS3107
SOT-223
123
INPUT GND OUTPUT
Top View
TAB IS
GND
TO-252
(D)
3
2
1
OUTPUT
INPUT
Top View
8L SOIC
SO-Package (S)
OUTPUT 1
GROUND 2
GROUND 3
ADJ/ N/C 4
8 INPUT
7 GROUND
6 GROUND
5 ON/OFF
Top View
TYPICAL PERFORMANCE CHARACTERISTICS
Dropout Voltage
0.6
0.5
IO = 350mA
0.4
0.3 IO = 200mA
IO = 150mA
0.2
IO = 100mA
0.1
0
0 40 80 120
JUNCTION TEMPERATURE (° C)
Dropout Voltage
0.6
0.5
0.4
0.3
0.2
0.1
0
0 100 200 300 400 500 600
OUTPUT CURRENT (mA)
Low Voltage Behavior
6.0
AMS3107-3.3
5.0 IO = 500mA
4.0
3.0
2.0
0
2.0 3.0 4.0 5.0 6.0
INPUT VOLTAGE (V)
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

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TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
AMS3107
Low Voltage Behavior
6.0
AMS3107-5.0
5.0 IO = 500mA
4.0
3.0
2.0
0
2.0 3.0 4.0 5.0 6.0
INPUT VOLTAGE (V)
Output at Voltage Extremes
6
AMS3107-3.3
5 RL=500m
4
3
2
1
0
-1
-20 -10 0 10 20 30 40 50 60
INPUT VOLTAGE (V)
Output at Voltage Extremes
6
AMS3107-5.0
5 RL=500m
4
3
2
1
0
-1
-20 -10 0 10 20 30 40 50 60
INPUT VOLTAGE (V)
Output Impedance
10
IO = 10mA
1
0.1
0.01
1
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
Peak Output Current
1200
1000
800
TJ= 25°C
600
400
200
0
0
10 20
INPUT VOLTAGE (V)
30
Ripple Rejection
85
80
C2 = 22µF
TANTALUM
75
C2 = 100 µF
70 ALUM
65
60
55
50 IO= 10mA
45
1 10 100 1k 10k 100k 1M
FREQUENCY (Hz)
Quiescent Current
17.5
15
IO= 10mA
12.5
10
7.5
5.0
2.5
0
-2.5
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
Quiescent Current
VIN = 6V
10
8
6
4
2
0
0 50 100 150 200 250 300 350
OUTPUT CURRENT (mA)
Quiescent Current
25
20
15
10
~~
3
2
1
0
-40
IO = 200mA
IO = 100mA
~~
IO = 50mA
IO = 0mA
0 40 80 120
TEMPERATURE (° C)
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140