Advanced
Monolithic
Systems
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
•
Overvoltage Protection
•
ON/OFF Pin
AMS500
LOW COST 500mA REGULATOR
RoHS compliant
APPLICATIONS
•
Cellular Telephones
•
Portable Consumer Equipment
•
Portable (Notebook) Computers
•
Battery Powered Systems
•
Portable Instrumentation
•
Radio Control Systems
•
CD/DVD drives
•
Automotive
GENERAL DESCRIPTION
The AMS500 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
low input-output differential required for proper regulation (0.2V for output currents of 100mA) make the AMS500 ideal to use
for standby power systems.
Internal circuitry of AMS500 is protected from input fault conditions caused by input voltages that exceed maximum rated input
voltage. During line transients, 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 AMS500 series also includes
internal current limiting, thermal shutdown.
The AMS500 is offered in 3 lead TO-92, SOT-89, SOT-223 and 5 leads SOT-23 packages.
ORDERING INFORMATION
OUTPUT
PACKAGE TYPE
SOT-23-5
AMS500M1-X
AMS500M1
SOT-223
AMS500-X (R)
TEMP.
RANGE
-40ºC to +85 ºC
-40ºC to +85 ºC
3L TO-92
SOT-89
VOLTAGE
FIXED
AMS500N-X
AMS500L-X
ADJ.
X = 2.0V, 2.5V, 3.0V, 3.3V, 3.5V, 4.0V, 5.0V.
www.advanced-monolithic.com
updated April 24, 2009
AMS500
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Voltage
Operating
Overvoltage Protection
Internal Power Dissipation (Note 4)
25V
26V 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
=6.3V, I
O
=5mA, T
J
=25°C, C2 = 22µF unless otherwise specified.
PARAMETER
Fixed Output Voltage Versions
Output Voltage Tolerance
6.3V
≤V
IN
≤25V,
I
O
=100 mA
Line Regulation
6V
≤V
IN
≤
15V
15V
≤V
IN
≤
25V
Load Regulation
5mA
≤I
O
≤
100 mA
5mA
≤10 ≤
200 mA
5mA
≤10 ≤
350 mA
5mA
≤10 ≤
500 mA
Dropout Voltage
I
O
= 100 mA
I
O
= 200 mA
I
O
= 350 mA
I
O
= 500 mA
Quiescent Current
I
O
≤
10 mA,
I
O
= 100 mA
I
O
≤
200 mA
I
O
= 350 mA
Output Noise Voltage
Output Bypass Capacitor
Ripple Rejection
Maximum Operational Input
Voltage
Maximum Line Transient
R
L
= 500Ω, V
O
≤
5.5V
T = 1ms,
τ ≤100ms
10Hz-100kHz, C
OUT
= 100µF
ESR=0.1 to 10Ω
f
O
=120Hz
25
35
-4.0
±
5.0
5
5
5
15
20
20
250
400
450
550
0.2
2
5
12
50
10
80
28
40
10
30
25
40
60
75
400
500
600
800
0.5
4
10
+4.0
%
%
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mA
mA
mA
mA
µV
rms
µF
dB
V
V
CONDITIONS
AMS500-X
Min.
Typ.
Max.
Units
www.advanced-monolithic.com
updated April 24, 2009
AMS500
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at V
IN
=6V, V
OUT
=3V I
O
=5mA, T
J
=25°C, R1 =27k, C2 = 2µF unless otherwise specified.
PARAMETER
Adjustable Version
Reference Voltage
I
O
≤
100 mA, -40°C
≤T
J
≤
125°C,
R1=27k, Measured from V
OUT
to Adj. Pin
Output Voltage Range
Line Regulation
Load Regulation
6V
≤V
IN
≤
25V
5mA
≤I
O
≤
100 mA
5mA
≤10 ≤
200 mA
5mA
≤10 ≤
350 mA
5mA
≤10 ≤
500 mA
Dropout Voltage
I
O
= 100 mA
I
O
= 200 mA
I
O
= 350 mA
I
O
= 500 mA
Quiescent Current
I
O
= 0 mA,
I
O
= 100 mA
I
O
= 200 mA
I
O
= 350 mA
Output Noise Voltage
Output Bypass Capacitor
Long Term Stability
Ripple Rejection
Maximum Operational Input
Voltage
Maximum Line 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
V
O
= 3V
1.8
2.0
35
60
1.5
V
V
µA
10Hz-100kHz
ESR=0.1 to 10Ω
T =1000hr
f
O
= 120Hz
21
35
1.20
1.180
2
.02
0.3
0.5
1.0
1.0
50
300
500
600
0.18
2.0
5.0
12
100
10
0.4
0.02
22
40
1.235
1.235
1.27
1.290
24
1.5
0.5
1
1.5
2.0
400
500
600
800
0.5
4
10
V
V
V
mV/V
%
%
%
%
mV
mV
mV
mV
mA
mA
mA
mA
µV
rms
/V
µF
%/1000hr
dB
V
V
CONDITIONS
(Note 2)
AMS500-X
Min.
Typ.
Max.
Units
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 TO-92 (N), 110°C/W for SOT-89 (L), 90°C/W for SOT-223 and
220°C/W for 5 lead SOT-23.
www.advanced-monolithic.com
updated April 24, 2009
AMS500
PIN CONNECTIONS
TO-92
Plastic Package (N)
OUTPUT
INPUT
SOT-89
(L)
5 Lead SOT-23
(M1)
INPUT 1
GROUND 2
ON/OFF 3
4 ADJ / N/C
5 OUTPUT
GND
INPUT
1
2
GND
3
OUTPUT
Bottom View
Top View
Top View
SOT-223
SOT-223
R=
1
INPUT
2
GND
3
OUTPUT
1
2
3
INPUT
OUTPUT GND
Top View
Top View
TYPICAL PERFORMANCE CHARACTERISTICS
Dropout Voltage
0.6
INPUT OUTPUT DIFFERENTIAL
(V)
INPUT OUTPUT DIFFERENTIAL
(V)
0.5
0.4
0.3
0.2
0.1
0
0
80
40
120
JUNCTION TEMPERATURE (° C)
I
O
=
350mA
I
O
=
200mA
I
O
= 150mA
I
O
= 100mA
Dropout Voltage
0.6
OUTPUT VOLTAGE (V)
0.5
0.4
0.3
0.2
0.1
0
0
100 200 300 400 500
OUTPUT CURRENT (mA)
600
6.0
5.0
4.0
3.0
2.0
0
Low Voltage Behavior
AMS500-3.3
I
O
= 500mA
2.0
3.0
4.0
5.0
6.0
INPUT VOLTAGE (V)
www.advanced-monolithic.com
updated April 24, 2009
AMS500
TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
Low Voltage Behavior
6.0
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
5.0
4.0
3.0
2.0
0
2.0
3.0
4.0
5.0
6.0
INPUT VOLTAGE (V)
AMS500-5.0
I
O
= 500mA
Output at Voltage Extremes
6
5
4
3
2
1
0
-1
-20 -10
0 10 20 30 40 50 60
INPUT VOLTAGE (V)
AMS500-3.3
R
L
=500mΩ
Output at Voltage Extremes
6
AMS500-5.0
5
OUTPUT VOLTAGE (V)
4
3
2
1
0
R
L
=500mΩ
-1
-20 -10
0 10 20 30 40 50 60
INPUT VOLTAGE (V)
Reference Voltage
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
3
6 9 12 15 18 21 24
OUTPUT VOLTAGE (V)
AMS500 ADJUSTABLE
Peak Output Current
1200
OUTPUT CURRENT (mA)
RIPPLE REJECTION (dB)
1000
800
T
J
= 25°C
Ripple Rejection
85
80
75
70
65
60
55
50
45
30
1
I
O
= 10mA
C2 = 100µF
ALUM
C2 = 22µF
TANTALUM
600
400
200
0
0
20
10
INPUT VOLTAGE (V)
10
100 1k 10k 100k 1M
FREQUENCY (Hz)
Quiescent Current
17.5
QUIESCENT CURRENT (µA)
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
I
O
= 10mA
Quiescent Current
25
QUIESCENT CURRENT (mA)
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
20
15
I
O
= 200mA
10
3
2
1
I
O
= 0mA
~
~
I
O
= 100mA
I
O
= 50mA
~
~
0
-40
0
40
80
120
TEMPERATURE (° C)
www.advanced-monolithic.com
updated April 24, 2009
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