AMS AMS3101

AMS3101
FEATURES
APPLICATIONS
• 0.6V to 6V in 100mV increments Voltages Available
• Active High On/Off Control
• Output Current of 150mA
• Quiescent Current of <1µA when in Shutdown
• Low Dropout Voltage of 250mV at 150mA
• Wide Supply Voltage Range 1.5V to 15V
• Short Circuit and Thermal Protection
• Power Good function option
• Ceramic Output Capacitor OK
• Reference bypass for lower noise
• Battery Powered Systems
• Cellular Phones
• Cordless Telephones
• Portable (Notebook) Computers
• Portable Instrumentation
• Portable Consumer Equipment
• Personal Communication Equipment
• Radio Control Systems
• Low Voltage Systems
• 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
PACKAGE TYPE
OPERATING TEMP.
5L SOT-23
AMS3101AM1-XXBP
AMS3101M1-XXBP
AMS3101AM1-XXPG
AMS3101M1-XXPG
AMS3101AM1-ADJ
AMS3101M1-ADJ
RANGE
IND
IND
IND
IND
IND
IND
PIN CONNECTIONS
5 Lead SOT-23
(M1)
5 Lead SOT-23
(M1)
5 Lead SOT-23
(M1)
FIXED VOLTAGE
FIXED VOLTAGE
ADJ VOLTAGE
Top View
Top View
Top View
XX =specify the output voltage required
PG=Power Good Open Collector pin
BP=Reference bypass pin for lower noise
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AMS3101
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Voltage
Power Dissipation
Thermal Resistance
Operating Temperature Range
16V
Internally limited
410°C/W
-40°C to +125°C
Maximum Junction Temperature
Storage Temperature
Lead Temperature (Soldering 25 sec)
ESD Rating
+150°C
-65°C to +150°C
265°C
2kV
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at VIN =VOUT +1V, IO=1mA, CIN =10µF, COUT = 22µF, VON/OFF = 2V unless otherwise specified.
PARAMETER
Reference Voltage
AMS3101A-X
CONDITIONS
Adjustable device option
Output Voltage
AMS3101-X
Typ.
Max.
Min.
Typ.
Max.
0.594
0.600
0.606
0.488
0.600
0.612
V
-1
1
-2
2
%
-2
2
-3.5
3.5
%
0.6
1
mV/V
0.1
0.4
(Fixed Output Version)
1mA ≤I ≤ 150 mA
Line Regulation
VOUT+1V ≤ V ≤ 15V
0.6
1
Load Regulation
IL = 0.1mA to 150mA
0.1
0.4
O
Units
Min.
IN
2
2
0.8
mV/mA
0.8
I = 0 mA
70
100
70
100
µA
I = 150 mA
1.2
1.5
1.2
1.5
mA
Dropout Voltage
I = 150 mA
200
250
200
250
mV
Quiescent Current
VEN ≤ 0.9V (shutdown)
0.01
1
µA
5
µA
Ground Pin Current
O
O
O
VEN ≤ 0.8V (shutdown)
5
Ripple Rejection
f = 1kHz, COUT =10µF
75
75
dB
Output Noise Voltage
300Hz< f <50kHz, CO=10µF,
60
60
µV
Short Circuit Current
RL =0Ω
140
140
mA
Control Terminal Specifications (note 2)
On/Off Input Current
VON/OFF = 0V
VON/OFF = 5V
On/Off Input Voltage
High = Output On
1.3
0
-1
5
15
1.25
1.3
0.9
Low = Output Off
0
-1
µA
5
15
µA
1.25
V
0.9
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: The ON/OFF inputs must be properly driven to prevent possible misoperation.
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.
TYPICAL APPLICATION CIRCUIT
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AMS3101
TYPICAL PERFORMANCE
25 Ω Load Start up from enable with
VIN = 4.5V output C = 2.2u, Ref C=0pf.
500 Ω Load Start up from Enable with
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
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AMS3101
TYPICAL PERFORMANCE
Ground Current
2.55
5.00E-03
2.54
4.50E-03
2.53
4.00E-03
2.52
3.50E-03
2.51
3.00E-03
Ignd
Vout
Load Regulation
2.5
2.50E-03
2.49
2.00E-03
2.48
1.50E-03
2.47
1.00E-03
2.46
5.00E-04
2.45
0
0.05
0.1
0.15
0.00E+00
0.2
0
0.05
0.1
Load Current
0.15
0.2
Load
Load Regulation for 4.5v input 2.5v set point
Ground current VS load for VIN = 4.5V and output = 2.5V
Undervoltage Zone
Drop out Voltage
2.55
0.3
2.5
0.25
0.2
2.4
Vout
Drop voltage
2.45
0.15
2.35
2.3
0.1
2.25
0.05
2.2
0
2.15
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
2.3
0.16
2.4
2.5
2.6
2.7
2.8
2.9
3
Vin
Load
Dropout Vs Load for VIN = 2.3V
2.5V regulator with 10mA load showing under-voltage dropout
Line Regulation
2.503
Output Voltage
2.5025
2.502
2.5015
2.501
2.5005
2.5
2.4995
0
5
10
15
20
25
Vin
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AMS3101
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)
0.014-0.020
(0.350-0.50)
0.037
(0.95)
TYP
0.018-0.024
(0.457-0.610)
10°
NOM
0.036-0.051
(0.090-1.30)
0.0035-0.0080
(0.090-0.20)
0.003
(0.150)
MAX
10°
NOM
0.075
(1.90)
TYP
0.018-0.024
(0.457-0.610)
(SOT-23-5 ) AMS DRW# 051001
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