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Advanced
Monolithic
Systems
AMS78LXX
100mA VOLTAGE REGULATOR
FEATURES
5.0V, 6.2V and 8.0V Output Voltage Available*
Output Voltage Tolerance of ±5% Over Temperature
Output Current in excess of 100mA
Internal Thermal Overload Protection
Overvoltage Protection
Short Circuit protection
TO-92, SO-8 and SOT-89 Packages Available
APPLICATIONS
Battery Powered Systems
Portable Consumer Equipment
Cordless Telephones
Portable (Notebook) Computers
Portable Instrumentation
Radio Control Systems
Logic Systems
GENERAL DESCRIPTION
The AMS78LXX series consists of positive fixed voltage regulators ideally suited for use in battery-powered systems. These
devices feature very low quiescent current of 1mA or less when supplying 10mA loads. This unique characteristic and the low
input -output differential of less than 1V required for proper regulation, make the AMS78LXX ideal to use for standby power
systems and portable equipment.
The AMS78LXX series also includes internal current limiting, over voltage protection, thermal shutdown, and is able to
withstand temporary power-up with mirror-image insertion.
The AMS78LXX series is offered in the 3-pin TO-92 package, 8-pin plastic SOIC and SOT-89 packages.
ORDERING INFORMATION
OUTPUT
PACKAGE TYPE
VOLTAGE*
TO-92
8 LEAD SOIC
5.0V AMS78L05N AMS78L05S
6.2V AMS78L62N AMS78L62S
8.0V AMS78L08N AMS78L08S
* For other fixed voltages consult factory.
SOT-89
AMS78L05L
AMS78L62L
AMS78L08L
OPER. TEMP
RANGE
IND
IND
IND
PIN CONNECTION
TO-92
Plastic Package (N)
OUTPUT
INPUT
GND
Bottom View
8L SOIC
SO-Package (S)
OUTPUT 1
GROUND 2
GROUND 3
N/C 4
8 INPUT
7 GROUND
6 GROUND
5 N/C
Top View
SOT-89 Package
(L)
123
INPUT GND OUTPUT
Front View
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
24V
Power Dissipation (Note 4)
Internally Limited
Operating Junction Temperature
0°C to +125°C
AMS78LXX
Storage Temperature
-65°C to +150°C
Lead Temperature (Soldering 10 sec)
230°C
ESD 1000V
ELECTRICAL CHARACTERISTICS
AMS78L05
Electrical Characteristics at VIN =10V, IO =10mA, TJ=25°C, C1=0.33µF, CO = 10µF unless otherwise specified.
PARAMETER
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Output Noise Voltage
Peak Output Current
Average Output Voltage Tempco
Ripple Rejection
Minimum Value of Input Voltage
Required to Maintain Line Regulation
CONDITIONS
(Note 2)
7V
V
IN
20V,
IO=100
mA
-40°C T 125°C
J
7V V 20V
IN
8V V 20V
IN
1mA I 100 mA
O
1mA I 40 mA
O
10Hz-100kHz
I = 5 mA
O
fO = 120Hz
8V V 16V
IN
Min.
4.80
4.75
47
Typ.
5.0
18
10
20
5
0.6
40
200
-0.65
62
5.6
Max.
5.2
5.25
75
54
60
30
1.0
6.0
Units
V
V
mV
mV
mA
µV
mA
mV/°C
dB
V
AMS78L62
Electrical Characteristics at VIN =12V, IO =10mA, TJ=25°C, C1=0.33µF, CO = 10µF unless otherwise specified.
PARAMETER
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Output Noise Voltage
Peak Output Current
Average Output Voltage Tempco
CONDITIONS
(Note 2)
8.5V
V
IN
20V,
IO=100
mA
-40°C T 125°C
J
8.5V V 20V
IN
9V V 20V
IN
1mA I 100 mA
O
1mA I 40 mA
O
10Hz-100kHz
I = 5 mA
O
Min.
5.95
5.9
Typ.
6.2
65
55
13
6
0.6
50
200
-0.75
Max.
6.45
6.5
175
125
80
40
1.0
Units
V
V
mV
mV
mA
µV
mA
mV/°C
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

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AMS78LXX
ELECTRICAL CHARACTERISTICS (Continued)
AMS78L62
Electrical Characteristics at VIN =12V, IO =10mA, TJ=25°C, C1=0.33µF, CO = 10µF unless otherwise specified.
PARAMETER
Ripple Rejection
Minimum Value of Input Voltage
Required to Maintain Line Regulation
CONDITIONS
(Note 2)
fO = 120Hz
10V V 20V
IN
Min.
40
Typ.
46
6.8
Max.
7.0
Units
dB
V
AMS78L08
Electrical Characteristics at VIN =14V, IO =10mA, TJ=25°C, C1=0.33µF, CO = 10µF unless otherwise specified.
PARAMETER
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Output Noise Voltage
Peak Output Current
Average Output Voltage Tempco
Ripple Rejection
Minimum Value of Input Voltage
Required to Maintain Line Regulation
CONDITIONS
(Note 2)
11V
V
IN
23V,
IO=100
mA
-40°C T 125°C
J
11V V 23V
IN
12V V 23V
IN
1mA I 100 mA
O
1mA I 40 mA
O
10Hz-100kHz
I = 5 mA
O
fO = 120Hz
12V V 22V
IN
Min.
7.60
7.60
39
Typ.
8.0
80
70
15
8
0.6
60
200
-0.78
45
9.0
Max.
8.40
8.40
175
125
80
40
1.0
9.5
Units
V
V
mV
mV
mA
µV
mA
mV/°C
dB
V
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: See Circuit in Typical Applications. 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 junction-to-ambient thermal resistance are as follows: 195°C/W for the TO-92 (N) package, 160°C/W for the molded plastic SO-8 (S), 150°C/W for
the SOT-89 package.
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
Dropout Voltage
0.6
0.5
0.4 IO = 100mA
0.3
0.2
0.1
0
0 40 80 120
JUNCTION TEMPERATURE (° C)
Peak Output Current
600
500
400
300
200
100
0
0
TJ= 25°C
TJ = 85°C
TJ = -40°C
10 20
INPUT VOLTAGE (V)
30
AMS78LXX
Low Voltage Behavior
6.0
AMS78L05
5.0 IO = 100mA
4.0
3.0
2.0
0
2.0 3.0 4.0 5.0 6.0
INPUT VOLTAGE (V)
Output at Voltage Extremes
12
AMS78L05
10 RL=500
8
6
4
2
0
-2
-20 -10 0 10 20 30 40 50 60
INPUT VOLTAGE (V)
Line Transient Response
3
2
1
0
-1
-2
-3 ~~
VIN =
C2=
1V0O0UµT F=
9V
~~
3
0
0
15 30
TIME (µs)
45
Load Transient Response
40 C2= 100µF
0
-40
~~
150
~~
0
0
15 30
TIME (µs)
45
Quiescent Current
35
30 5V OUTPUT
25
20
15
10 IO= 100mA
5 IO= 50mA
0
-5
-20 -10 0 10 20 30 40 50 60
INPUT VOLTAGE (V)
Quiescent Current
30
VIN = 14V
25
20
15
10
5
0
0 30 60 90
OUTPUT CURRENT (mA)
Quiescent Current
25
20
15
10
~~
3
2
1
0
-40
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

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TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
AMS78LXX
Maximum Power Dissipation (SO-8)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0 10 20 30 40 50 60 70 80 90
AMBIENT TEMPERATURE (° C)
Maximum Power Dissipation (SOT-89)
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0 10 20 30 40 50 60 70 80 90 100
AMBIENT TEMPERATURE (° C)
Maximum Power Dissipation (TO-92)
1.0
0.9
0.8
0.7
0.6
0.125" Lead Lenght
from PC Board
0.5 0.4" Lead
0.4 Lenght from
PC Board
0.3
0.2
0.1
0
0 10 20 30 40 50 60 70 80
AMBIENT TEMPERATURE (° C)
TYPICAL APPLICATIONS
Fixed Output Regulator
VIN
UNREGULATED
INPUT
C1*
0.33µF
AMS78LXX
GND
IQ
VOUT
REGULATED
OUTPUT
C2**
10µF
*Required if regulator is located far from power supply filter.
**C2 must be at least 10µF to maintain stability; it can be increased without bound to maintain regulation during transients and it should be
located as close as possible to the regulator. This capacitor must be rated over the same operating temperature range like the regulator.
Current Regulator
INPUT
C1
0.33µF
IOUT = (VOUT/R1)+IQ
>IQ = 1.5mA over line and load changes
AMS78LXX
R1
OUTPUT
IOUT
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140