ADMOS AMS500N-20 Low cost 500ma regulator Datasheet

Advanced
Monolithic
Systems
AMS500
LOW COST 500mA REGULATOR
FEATURES
APPLICATIONS
• 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
• 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 and 5 leads SOT-23 packages.
ORDERING INFORMATION
OUTPUT
PACKAGE TYPE
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.
TEMP.
SOT-23-5
AMS500M1-X
AMS500M1
RANGE
IND
IND
PIN CONNECTIONS
TO-92
Plastic Package (N)
OUTPUT
SOT-89
(L)
INPUT
5 Lead SOT-23
(M1)
INPUT 1
5 OUTPUT
GROUND 2
ON/OFF 3
GND
1
INPUT
Bottom View
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2
GND
4 ADJ / N/C
3
OUTPUT
Top View
Top View
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
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 10 sec)
230°C
ESD
2000V
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at VIN =6.3V, IO =5mA, TJ=25°C, C2 = 22µF unless otherwise specified.
PARAMETER
CONDITIONS
AMS500-X
Min.
Typ.
Max.
Units
Fixed Output Voltage Versions
Output Voltage Tolerance
-4.0
6.3V ≤V ≤25V, IO=100 mA
± 5.0
IN
Line Regulation
+4.0
%
%
6V ≤V ≤ 15V
5
10
mV
15V ≤V ≤ 25V
5
30
mV
IN
IN
Load Regulation
5mA ≤I ≤ 100 mA
5
25
mV
15
40
mV
20
60
mV
20
75
mV
Dropout Voltage
5mA ≤10 ≤ 200 mA
5mA ≤10 ≤ 350 mA
5mA ≤10 ≤ 500 mA
I = 100 mA
0.25
0.40
mV
I = 200 mA
0.40
0.50
mV
I = 350 mA
0.45
0.60
mV
I = 500 mA
0.55
0.80
mV
I ≤ 10 mA,
0.2
0.5
mA
I = 100 mA
2
4
mA
I ≤ 200 mA
5
10
mA
I = 350 mA
12
Output Noise Voltage
10Hz-100kHz, COUT = 100µF
50
µV rms
Output Bypass Capacitor
ESR=0.1 to 10Ω
10
µF
Ripple Rejection
fO =120Hz
O
O
O
O
O
Quiescent Current
O
O
O
mA
O
Maximum Operational Input
Voltage
Maximum Line Transient
RL = 500Ω, VO ≤ 5.5V
80
dB
25
28
V
35
40
V
T = 1ms, τ ≤100ms
Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS500
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at VIN =6V, VOUT =3V IO =5mA, TJ=25°C, R1 =27k, C2 = 2µF unless otherwise specified.
PARAMETER
CONDITIONS
(Note 2)
AMS500-X
Units
Min.
Typ.
Max.
1.20
1.235
1.27
V
1.180
1.235
1.290
V
Adjustable Version
Reference Voltage
IO ≤ 100 mA, -40°C ≤T ≤ 125°C,
J
R1=27k, Measured from VOUT to Adj. Pin
Output Voltage Range
24
V
Line Regulation
6V ≤V ≤ 25V
2
.02
1.5
mV/V
Load Regulation
5mA ≤I ≤ 100 mA
0.3
0.5
%
1
%
1.0
1.5
%
Dropout Voltage
5mA ≤10 ≤ 200 mA
5mA ≤10 ≤ 350 mA
5mA ≤10 ≤ 500 mA
I = 100 mA
0.5
IN
O
1.0
2.0
%
0.05
0.40
V
I = 200 mA
0.3
0.50
V
I = 350 mA
0.5
0.60
V
I = 500 mA
0.6
0.80
V
I = 0 mA,
0.18
0.5
mA
I = 100 mA
2.0
4
mA
I = 200 mA
5.0
10
mA
I = 350 mA
12
mA
Output Noise Voltage
10Hz-100kHz
100
µVrms/V
Output Bypass Capacitor
ESR=0.1 to 10Ω
10
µF
Long Term Stability
T =1000hr
0.4
%/1000hr
Ripple Rejection
fO = 120Hz
0.02
dB
21
22
V
35
40
V
O
O
O
O
Quiescent Current
O
O
O
O
Maximum Operational Input
Voltage
IO = 10mA, Reference Voltage ≤ 1.5V
Maximum Line Transient
T = 1ms, τ ≤100ms
On/Off Threshold Voltage
VO = 3V
1.8
On
2.5
Off
On/Off Threshold Current
VOFF = 2.4V
1.5
2.0
35
V
V
60
µA
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 TA = TJ = 25°C.
Note 4: The maximum allowable power dissipation is a function of the maximum junction temperature TJ(MAX), the junction-to ambient thermal resistance θJ-A and the
ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is calculated using:
P(MAX) =
TJ(MAX) - TA
θJ - 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) and 220°C/W for 5 lead SOT-23.
Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS500
TYPICAL PERFORMANCE CHARACTERISTICS
IO = 350mA
IO = 200mA
0.3
IO = 150mA
0.2
IO = 100mA
0.1
0
0
0.6
6.0
0.5
5.0
OUTPUT VOLTAGE (V)
0.5
0.4
0.4
0.3
0.2
0.1
0
80
120
40
JUNCTION TEMPERATURE (° C)
AMS500-5.0
IO = 500mA
3.0
2.0
2.0
3.0
4.0
5.0
6.0
INPUT VOLTAGE (V)
AMS500-5.0
5
4
3
2
1
0
Reference Voltage
3
2
1
0
0 10 20 30 40 50 60
INPUT VOLTAGE (V)
Ripple Rejection
85
AMS500 ADJUSTABLE
C2 = 22 µF
TANTALUM
1.24
1.22
1.20
1.18
1.16
1.14
1.12
1.10
1000
800
RIPPLE REJECTION (dB)
OUTPUT CURRENT (mA)
80
1.26
TJ= 25°C
600
400
200
0
6 9 12 15 18 21 24
OUTPUT VOLTAGE (V)
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4
-1
-20 -10
0 10 20 30 40 50 60
INPUT VOLTAGE (V)
1200
3
RL=500mΩ
Peak Output Current
1.30
3.0
4.0
5.0
6.0
INPUT VOLTAGE (V)
Output at Voltage Extremes
AMS500-3.3
RL=500mΩ
-1
-20 -10
0
0
2.0
600
OUTPUT VOLTAGE (V)
4.0
1.28
3.0
6
5
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
100 200 300 400 500
OUTPUT CURRENT (mA)
6
2.0
4.0
Output at Voltage Extremes
Low Voltage Behavior
5.0
AMS500-3.3
IO = 500mA
0
0
6.0
REFERENCE VOLTAGE (V)
Low Voltage Behavior
Dropout Voltage
INPUT OUTPUT DIFFERENTIAL (V)
INPUT OUTPUT DIFFERENTIAL (V)
Dropout Voltage
0.6
0
20
10
INPUT VOLTAGE (V)
75
65
60
55
IO= 10mA
50
45
30
C2 = 100 µF
ALUM
70
1
10
100 1k 10k 100k 1M
FREQUENCY (Hz)
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS500
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Quiescent Current
12.5
10
7.5
5.0
2.5
0
VIN = 6V
10
QUIESCENT CURRENT (mA)
QUIESCENT CURRENT (mA)
QUIESCENT CURRENT (µA)
IO= 10mA
15
-2.5
Quiescent Current
Quiescent Current
25
17.5
8
6
4
2
0
0
1
2 3 4 5 6 7 8
INPUT VOLTAGE (V)
9 10
0
20
15
IO = 200mA
10
~
~
IO = 100mA
2
IO = 50mA
1
IO = 0mA
0
-40
50 100 150 200 250 300 350
OUTPUT CURRENT (mA)
~
~
3
0
40
80
120
TEMPERATURE (° C)
APPLICATION NOTES
Definition of Terms
Dropout Voltage: The input-output voltage differential at which
the circuit stops to regulate against further reduction in input
voltage. Measured when the output voltage has dropped 100mV
from the nominal voltage obtained at 1V input, dropout voltage is
dependent upon load current and junction temperature.
Input Voltage: The DC voltage applied to the input terminal
with respect to ground. Input-Output Differential: The voltage
difference between the unregulated input voltage and the
regulated output voltage for which the regulator will regulate.
Line Regulation: The change in output voltage for a change in
the input voltage. The line regulation is measured under
conditions of low dissipation or by using low duty cycle pulse
testing such that the average chip temperature is not significantly
affected.
Load Regulation: The change in output voltage for a change in
load current at constant chip temperature.
Long term stability: Output voltage stability under accelerated
life-test conditions after 1000 hours with maximum rated voltage
and junction temperature.
Output Noise Voltage: The rms AC voltage at the output, with
constant load and no input ripple, measured over a specified
frequency range.
Quiescent Current: That part of the positive input current that
does not contribute to the positive load current. The regulator
ground lead current.
Ripple Rejection: The ratio of the peak-to –peak input ripple
voltage to the peak-to-peak output ripple voltage at specified
frequency.
Temperature Stability of VO: The percentage change in output
voltage for a thermal variation from room temperature to either
temperature extreme.
External capacitor
The AMS500 series require an output capacitor of 10µF or
greater to ensure device stability. Without the capacitor the
device may oscillate
Advanced Monolithic Systems, Inc.
Most type of tantalum or electrolytic capacitor can be used in the
applications. A critical characteristic of the capacitors is an ESR
value of 5Ω or less and a resonant frequency above 500kHz. The
value of this capacitor can be increased without limits.
For higher loads, the value of the capacitor should be increased,
specialy when the output voltage is set for 2.5V or less. The
AMS500 lowest fixed output voltage value is 2.0V
Typical application circuit (adjustable output)
V IN
100k
OUT
VOUT
OFF
ON/OFF
10µF
AMS500
ADJUSTABLE
R1
28k
+
ADJ
ON
GND
C1
22µF
R2
Minimum Load
In circuits using the fixed output voltage versions, minimum load
is not required. For circuits using the adjustable device, the value
of R1 and R2 should be chosen such, that a current of
approximately 40µA flows through the network. The reference
voltage (1.235V) is measured between the adjust pin and VOUT.
The output voltage can be set by the two resistors R1 and R2
using the following equation:
 R1 + R2 
VO = VREF 

 R1 
The value of R1 is recommended to be between 25kΩ to 30 kΩ,
and the value of R2 will set the output voltage.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS500
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.
3L TO-92 PLASTIC PACKAGE (N)
0.180±0.005
(4.572±0.127)
0.060±0.005
(1.524±0.127)
DIA
0.060±0.010
(1.524±0.254)
0.90
(2.286)
NOM
0.180±0.005
(4.572±0.127)
0.140±0.010
(3.556±0.127)
10°
NOM
5° NOM
0.500
(12.70)
MIN
0.050
(1.270)
MAX
UNCONTROLLED
LEAD DIMENSIONS
0.015±0.002
(0.381±0.051)
0.016±0.003
(0.406±0.076)
0.050±0.005
(1.270±0.127)
N (TO-92 ) AMS DRW# 042391
SOT-89 PLASTIC PACKAGE (L)
0.173-0.181
(4.40-4.60)
0.055-0.063
(1.40-1.60)
0.014-0.017
(0.35-0.44)
0.064-0.072
(1.62-1.83)
0.155-0.167
(3.94-4.25)
0.084-0.090
(2.13-2.29)
0.090-0.102
(2.29-2.60)
0.035-0.047
(0.89-1.20)
0.059
(1.50)
BSC
0.014-0.019
(0.36-0.48)
0.017-0.022
(0.44-0.56)
L (SOT-89 ) AMS DRW# 042392
0.118
(3.00)
BSC
Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS500
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted (Continued).
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
Advanced Monolithic Systems, Inc.
0.075
(1.90)
TYP
10°
NOM
0.018-0.024
(0.457-0.610)
(SOT-23-5 ) AMS DRW# 051001
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
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