http://www.BDTIC.com/AMS
Advanced AMS3101
Monolithic 150mA LOW DROPOUT VOLTAGE REGULATOR
Systems
RoHS compliant
FEATURES APPLICATIONS
• 0.6V to 6V in 100mV increments Voltages Available • Battery Powered Systems
• Active High On/Off Control • Cellular Phones
• Output Current of 150mA • Cordless Telephones
• Quiescent Current of <1µA when in Shutdown • Portable (Notebook) Computers
• Low Dropout Voltage of 250mV at 150mA • Portable Instrumentation
• Wide Supply Voltage Range 1.5V to 15V • Portable Consumer Equipment
• Short Circuit and Thermal Protection • Personal Communication Equipment
• Power Good function option • Radio Control Systems
• Ceramic Output Capacitor OK • Low Voltage Systems
• Reference bypass for lower noise • MP3 Player
GENERAL DESCRIPTION
The AMS3101 is a 150mA low dropout fixed voltage regulator, featuring an internal electronic switch controlled by TTL or
CMOS logic levels. When the Enable pin is pulled to a logic high level, the device is in the ON state. Designed specifically for
battery powered applications where low quiescent current, low dropout and low standby current are required, the AMS3101 is
ideal to use in standby power systems. Like other regulators the AMS3101 series also includes internal current limiting and
thermal shutdown. A high precision 0.6V voltage reference enables the device to provide very low output voltages. A key
feature includes a reference bypass pin to improve its low-noise performance for fixed output versions.
Ideal for space critical applications, the AMS3101 is available in the 5-pin SOT-23 surface mount package and requires only a
10µF capacitor on the output for a minimum amount of external components. The Power Good option is used when the Output
Voltage drop must be detected. If the Output Voltage drops by approximately 15% of its nominal value, the open collector on
PG pin will pull down to Low state.
ORDERING INFORMATION
PIN CONNECTIONS
PACKAGE TYPE OPERATING TEMP.
5L SOT-23
AMS3101AM1-XXBP IND
AMS3101M1-XXBP IND
AMS3101AM1-XXPG IND
AMS3101M1-XXPG IND
AMS3101AM1-ADJ IND
AMS3101M1-ADJ IND
RANGE
XX =specify the output voltage required
PG=Power Good Open Collector pin
BP=Reference bypass pin for lower noise
Advanced Monolithic Systems, Inc.
5 Lead SOT-23
(M1)
FIXED VOLTAGE
Top View
5 Lead SOT-23
(M1)
FIXED VOLTAGE
Top View
5 Lead SOT-23
(M1)
ADJ VOLTAGE
Top View
http://www.BDTIC.com/AMS
AMS3101
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Voltage 16V Maximum Junction Temperature
Power Dissipation Internally limited Storage Temperature
Thermal Resistance
Operating Temperature Range
410°C/W
-40°C to +125°C
Lead Temperature (Soldering 25 sec)
ESD Rating 2kV
-65°C to +150°C
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at V
PARAMETER
Reference Voltage Adjustable device option 0.594 0.600 0.606 0.488 0.600 0.612 V
Output Voltage
(Fixed Output Version)
Line Regulation
=V
IN
OUT
CONDITIONS
1mA ≤I
V
≤ 150 mA
O
+1V ≤ VIN ≤ 15V
OUT
+1V, IO=1mA, CIN =10µF, C
AMS3101A-X AMS3101-X
Min. Typ. Max. Min. Typ. Max.
-1
-2
0.6 1 2 0.6 1 2 mV/V
= 22µF, V
OUT
1 2 -2
ON/OFF
= 2V unless otherwise specified.
2
-3.5
3.5
+150°C
265°C
Units
%
%
Load Regulation IL = 0.1mA to 150mA 0.1 0.4
0.8
Ground Pin Current I
Dropout Voltage I
Quiescent Current VEN ≤ 0.9V (shutdown)
Ripple Rejection
Output Noise Voltage
Short Circuit Current
Control Terminal Specifications (note 2)
On/Off Input Current
On/Off Input Voltage
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: The ON/OFF inputs must be properly driven to prevent possible misoperation.
= 0 mA
O
= 150 mA
I
O
= 150 mA 200 250 200 250 mV
O
V
≤ 0.8V (shutdown)
EN
= 0V
= 5V
OUT
=10µF
=10µF,
O
f = 1kHz, C
300Hz< f <50kHz, C
=0Ω
R
L
V
ON/OFF
V
ON/OFF
High = Output On
Low = Output Off
70
1.2
5 0.01 1 5 µA
75 75 dB
60 60
140 140 mA
0
5
1.3 1.25
0.9
100
1.5
-1
15
0.1 0.4
0.8
70
1.2
0
5
1.3 1.25
0.9
100
1.5
-1
15
mV/mA
µA
mA
µA
µV
µA
µA
V
V
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
TYPICAL APPLICATION CIRCUIT
Advanced Monolithic Systems, Inc.
http://www.BDTIC.com/AMS
AMS3101
TYPICAL PERFORMANCE
25 Ω Load Start up from enable with 500 Ω Load Start up from Enable with
VIN = 4.5V output C = 2.2u, Ref C=0pf. VIN= 4.5V, output C = 2.2u, Ref C=0pf.
Stop with 25Ω load using enable Output C =2.2Uf 10mA/150mA load transient VIN = 4.5V, VOUT = 2.5V
Soft Start with enable, 100nF on Ref pin, output C = 2.2uF, VIN = 4.5, Load = 1mA
Advanced Monolithic Systems, Inc.
http://www.BDTIC.com/AMS
AMS3101
TYPICAL PERFORMANCE
2.55
2.54
2.53
2.52
2.51
2.5
Vout
2.49
2.48
2.47
2.46
2.45
0 0.05 0.1 0.15 0.2
Load Regulation
Load Current
5.00E-03
4.50E-03
4.00E-03
3.50E-03
3.00E-03
2.50E-03
Ignd
2.00E-03
1.50E-03
1.00E-03
5.00E-04
0.00E+00
0 0.05 0.1 0.15 0.2
Load Regulation for 4.5v input 2.5v set point Ground current VS load for VIN = 4.5V and output = 2.5V
0.3
0.25
0.2
0.15
Drop voltage
0.1
0.05
0
0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16
Drop out Voltage
Load
2.55
2.5
2.45
2.4
2.35
Vout
2.3
2.25
2.2
2.15
2.3 2.4 2.5 2.6 2.7 2.8 2.9 3
Dropout Vs Load for VIN = 2.3V 2.5V regulator with 10mA load showing under-voltage dropout
2.503
2.5025
2.502
2.5015
2.501
Output Voltage
2.5005
2.5
2.4995
0 5 10 15 20 25
Line Regulation
Vin
Ground Current
Load
Undervoltage Zone
Vin
Advanced Monolithic Systems, Inc.
http://www.BDTIC.com/AMS
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.
5 LEAD SOT-23 PLASTIC PACKAGE (M1)
0.110-0.120
(2.794-3.048)
0.102-0.118
(2.60-3.00)
0.059-0.070
(1.50-1.75)
AMS3101
0.018-0.024
(0.457-0.610)
0.036-0.051
(0.090-1.30)
0.003
(0.150)
MAX
0.037
(0.95)
TYP
0.075
(1.90)
TYP
0.014-0.020
(0.350-0.50)
10°
NOM
10°
NOM
0.018-0.024
(0.457-0.610)
0.0035-0.0080
(0.090-0.20)
(SOT-23-5 ) AMS DRW# 051001
Advanced Monolithic Systems, Inc.
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