•• Short Circuit protection•• Radio Control Systems
•• TO-92, SO-8 and SOT-89 Packages Available•• 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
OUTPUTPACKAGE TYPEOPER. TEMP
VOLTAGE*
TO-928 LEAD SOICSOT-89
RANGE
5.0VAMS78L05NAMS78L05SAMS78L05LIND
6.2VAMS78L62NAMS78L62SAMS78L62LIND
8.0VAMS78L08NAMS78L08SAMS78L08LIND
* For other fixed voltages consult factory.
PIN CONNECTION
TO-92
Plastic Package (N)
OUTPUT
GND
INPUT
GROUND
GROUNDGROUND
8L SOIC
SO-Package (S)
1
OUTPUT
2
3
N/C
4
8
INPUT
GROUND
7
6
N/C
5
SOT-89 Package
(L)
1 2 3
OUTPUTGNDINPUT
Bottom ViewTop ViewFront View
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
Page 2
AMS78LXX
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Voltage24VStorage Temperature
Power Dissipation (Note 4)Internally LimitedLead Temperature (Soldering 10 sec)
Operating Junction Temperature
-40°C ≤T
11V ≤VIN ≤ 23V
12V ≤VIN ≤ 23V
1mA ≤IO ≤ 100 mA
1mA ≤IO ≤ 40 mA
O
12V ≤VIN ≤ 22V
≤125°C
J
= 5 mA-0.78
7.608.40
80175Line Regulation
70125
1580Load Regulation
840
3945dB
9.09.5V
V
mV
mV
µV
mV/°C
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
Page 4
TYPICAL PERFORMANCE CHARACTERISTICS
AMS78LXX
Dropout Voltage
0.6
0.5
0.4
IO = 100mA
0.3
0.2
0.1
0
INPUT OUTPUT DIFFERENTIAL (V)
040
80
JUNCTION TEMPERATURE (° C)
Output at Voltage Extremes
12
AMS78L05
RL=500
10
Ω
8
6
4
2
OUTPUT VOLTAGE (V)
0
-2
-20 -10 0 10 20 30 40 50 60
INPUT VOLTAGE (V)
120
Peak Output Current
600
500
TJ= 25°C
400
300
200
100
OUTPUT CURRENT (mA)
0
01020
INPUT VOLTAGE (V)
Line Transient Response
3
2
1
0
-1
DEVIATION (mV)
OUTPUT VOLTAGE
-2
~
~
-3
3
CHANGE (V)
0
INPUT VOLTAGE
0
TJ = 85°C
V
IN
C2= 100 µF
15
TIME (µs)
= V
= 9V
OUT
3045
TJ = -40°C
30
OUTPUT VOLTAGE
~
~
Low Voltage Behavior
6.0
AMS78L05
5.0
IO = 100mA
4.0
3.0
2.0
OUTPUT VOLTAGE (V)
0
2.03.04.05.06.0
INPUT VOLTAGE (V)
Load Transient Response
C2= 100µF
40
0
DEVIATION (mV)
-40
~
~
150
0
LOAD CURRENT(mA)
15
0
TIME (µs)
3045
~
~
Quiescent Current
35
5V OUTPUT
30
25
20
15
10
QUIESCENT CURRENT (mA)
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
QUIESCENT CURRENT (mA)
0
030
60
OUTPUT CURRENT (mA)
90
Quiescent Current
25
20
15
10
~
~
3
IO = 50mA
2
1
QUIESCENT CURRENT (mA)
IO = 0mA
0
-404080120
0
TEMPERATURE (° C)
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
~
~
Page 5
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
POWER DISSIPATION (W)
0.1
0
10 20 30 40 50 60 70 80 900
AMBIENT TEMPERATURE (° C)
TYPICAL APPLICATIONS
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
POWER DISSIPATION (W)
0.2
0
0 10406080
AMBIENT TEMPERATURE (° C)
Fixed Output Regulator
V
INPUT
IN
C1*
0.33µF
UNREGULATED
20 30507090 100
AMS78LXX
GND
I
Q
C2**
10µF
Maximum Power Dissipation (TO-92)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
POWER DISSIPATION (W)
0.1
0
V
OUT
REGULATED
OUTPUT
0.125" Lead Lenght
from PC Board
0.4" Lead
Lenght from
PC Board
10 20 30 40 50 60 70 800
AMBIENT TEMPERATURE (° C)
*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
AMS78LXX
R1
OUTPUT
I
OUT
I
OUT
= (V
OUT
/R1)+I
INPUT
C1
0.33µF
Q
>IQ = 1.5mA over line and load changes
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140