Advanced Monolithic Systems AMS5105 Service Manual
http://www.BDTIC.com/AMS
Advanced AMS5105
Monolithic 500mA CMOS LOW DROPOUT VOLTAGE REGULATOR
Systems
RoHS compliant
FEATURES APPLICATIONS
• Fixed and Adjustable Versions Available • Cellular Telephones
• Output Current up to 500mA • Portable Consumer Equipment
• Very Low Quiescent Current • Portable (Notebook) Computers
• Input-output Differential less than 0.5V • Battery Powered Systems
• Short Circuit Protection • Portable Instrumentation
• Internal Thermal Overload Protection • Radio Control Systems
• ENABLE Pin available in selected packages • CD/DVD drives
GENERAL DESCRIPTION
The AMS5105 series consists of positive fixed and adjustable voltage regulators ideally suited for use in battery-powered
systems. These devices feature very low quiescent current (500uA or less) when supplying loads up to 500mA, and a standby
current less than 500nA when disabled using the ENABLE pin (available in selected packages). These unique characteristics
and the low input-output differential required for proper regulation (0.5V for output currents of 500mA) make the AMS5105
ideal for use in standby power systems. Internal current limiting and thermal shutdown features provide protection for all
AMS5105 series devices regardless of package type. The AMS5105 is offered as fixed voltage regulators in the 5 lead SOT-23,
SOT-89, SOT-223, and 8 lead SOIC packages, and as adjustable voltage regulators in the 5 lead SOT-23 and 8 lead SOIC
packages. All devices in the 5 lead SOT-23 and 8 lead SOIC packages are provided with ENABLE pin.
ORDERING INFORMATION
OUTPUT PACKAGE TYPE TEMP.
VOLTAGE
5L SOT-23 SOT-89 SOT-223 SO-8
FIXED AMS5105M1-X AMS5105L-X AMS5105-X AMS5105S-X -25C to 125C
ADJUSTABLE AMS5105M1 AMS5105S -25C to 125C
X = 1.5V, 1.8V, 2.5V, 2.8V, 3.3V.
PIN CONNECTIONS
5 Lead SOT-23
(M1)
V
GROUND
ENABLE
1
IN
2
3
5
V
OUT
FB
4
N/C
Top View Top View Top View Top View
V
OUT
SOT-89
(L)
123
GND
V
IN
V
OUT
SOT-223
123
GND
V
RANGE
8 Lead SOIC
(S)
V
1
OUT
2
GROUND
3
IN
GROUND
FB
N/C
4
V
8
7
GROUND
GROUND
6
ENABLE
5
IN
N/C
Advanced Monolithic Systems, Inc.
http://www.BDTIC.com/AMS
AMS5105
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage -0.3 to +6.5V Maximum Junction Temperature
Internal Power Dissipation (Note 4) Internally Limited Storage Temperature
ESD 2000V Lead Temperature (Soldering 25 sec)
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at V
PARAMETER
Fixed Output Voltage Versions
Output Voltage Tolerance -1.5 +1.5 %
Line Regulation
Load Regulation
Dropout Voltage
Quiescent Current
Maximum Operational Input
Voltage
ENABLE Threshold Voltage
Enabled
Disabled
ENABLE Threshold Current V
Wake-Up Response Time
(from disabled state)
IN =VOUT
(V
+1V) ≤ VIN ≤6V, I
OUT
-25°C ≤T
(V
+1V) ≤VIN ≤ 6V
IN
1mA ≤I
5mA ≤ I
= 10 mA
I
OUT
I
= 100 mA
OUT
= 500 mA
I
OUT
= 10 mA
I
OUT
= 100 mA
I
OUT
I
= 500 mA
OUT
R
= 500Ω, In disabled state, V
L
6 V
VIN = 3V to 6V (Note 6)
ENABLE
(Note 7) - 20 30
(Note 1)
+125°C
-65°C to +150°C
+1V, I
CONDITIONS
≤125°C
J
≤ 100 mA
OUT
≤ 500 mA
OUT
= 0.6 x VIN, VIN = 3V to 6V 0.01 1 nA
=1mA, TJ=25°C, C
OUT
=100 mA
OUT
ENABLE
= 0
= 2.2µF unless otherwise specified.
OUT
AMS5105-X
Min. Typ. Max.
- 3.0
30
60
5
8
50
20
100
400
450
450
450
100
-
-
+ 3.0
10
30
50
70
25
125
500
550
550
550
500
15
Units
%
mV/V
mV/V
mV
mV
mV
mV
mV
µA
µA
µA
nA
% V
% V
µs
265°C
IN
IN
Advanced Monolithic Systems, Inc.
http://www.BDTIC.com/AMS
AMS5105
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at V
PARAMETER
Adjustable Version
Reference Voltage
Output Voltage Range 1.25 - 5 V
Line Regulation
Load Regulation
Dropout Voltage
Quiescent Current
Maximum Operational Input
Voltage
ENABLE Threshold Voltage
Enabled
Disabled
ENABLE Threshold Current V
Wake-Up Response Time
(from disabled state)
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
= TJ = 25°C.
A
Note 4: The maximum allowable power dissipation is a function of the maximum junction temperature T
and the ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is calculated using:
P(MAX)
Where the values of the junction-to-ambient thermal resistances are as follows: 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.
Note 6:
ENABLE Threshold Voltage levels are specified as a percentage of input voltage V
equal to V
Note 7: Time required for V
.
IN
OUT
IN
=6V, V
OUT
=3V, I
=1mA, TJ=25°C, C
OUT
CONDITIONS
(Note 2)
= 2.2µF unless otherwise specified.
OUT
Min.
AMS5105
Typ.
Max.
Units
1.231 1.250 1.269 V
≤ 100 mA, -25°C ≤T
I
OUT
Measured from FB pin to
+ 1V ≤VIN ≤ 6V
V
OUT
1mA ≤I
5mA ≤I
I
I
I
I
I
I
R
≤ 100 mA
O
≤ 500 mA
O
≤ 10 mA
OUT
= 100 mA
OUT
= 500 mA (Note 5)
OUT
= 10 mA
OUT
= 100 mA
OUT
= 500 mA
OUT
= 500Ω, In disabled state, V
L
V
= 3V to 6V (Note 6)
IN
= 0.6 x VIN, VIN = 3V to 6V 0.01 1 nA
ENABLE
(Note 7) - 20 30
≤ 125°C
J
GROUND
ENABLE
= 0
1.218 1.250 1.282
V
- 1.5 %
0.3 1 1
20
100
400
350
350
350
100
25
125
500
450
450
450
500
2
%
%
mV
mV
mV
µA
µA
µA
nA
6 V
60
-
-
-
-
15
% V
% V
IN
IN
µs
(MAX), the junction-to ambient thermal resistance θ
J
AJ
=
θ
to reach 95% of output voltage setting after V
T-(MAX)T
Aθ-J
. Quiescent current can be minimized by choosing V
IN
is switched from 0V to V
ENABLE
.
IN
ENABLE
HIGH
J-A
Advanced Monolithic Systems, Inc.
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