ADMOS AMS500N-4.0, AMS500N-3.5, AMS500N-3.3, AMS500N-3.0, AMS500N-2.5 Datasheet

Advanced AMS500
Monolithic LOW COST 500mA REGULATOR
Systems

FEATURES APPLICATIONS

•• Fixed and Adjustable Versions Available •• Cellular Telephones

•• Output Current up to 500mA •• Portable Consumer Equipment

•• Very Low Quiescent Current •• Portable (Notebook) Computers

•• Reverse Battery Protection •• Battery Powered Systems

•• Input-output Differential less than 0.6V •• Portable Instrumentation

•• Short Circuit Protection •• Radio Control Systems

•• Internal Thermal Overload Protection •• CD/DVD drives

•• Overvoltage Protection •• Automotive

•• ON/OFF Pin

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 TEMP.

VOLTAGE

3L TO-92 SOT-89 SOT-23-5

RANGE

FIXED AMS500N-X AMS500L-X AMS500M1-X IND

ADJ. AMS500M1 IND

X = 2.0V, 2.5V, 3.0V, 3.3V, 3.5V, 4.0V, 5.0V.

PIN CONNECTIONS

TO-92

Plastic Package (N)

OUTPUT

GND

INPUT

Bottom View Top View Top View

SOT-89

(L)

GROUND12

1 2 3

OUTPUTGNDINPUT

5 Lead SOT-23

(M1)

INPUT OUTPUT

ON/OFF ADJ / N/C

3

5

4

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone [phone] Fax [phone]

AMS500

ABSOLUTE MAXIMUM RATINGS (Note 1)

Input Voltage Maximum Junction Temperature
Operating 25V Storage Temperature

-65°C to +150°C

Overvoltage Protection 26V to 40V Lead Temperature (Soldering 10 sec)
Internal Power Dissipation (Note 4) Internally Limited ESD 2000V

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at V

PARAMETER CONDITIONS

Fixed Output Voltage Versions

Output Voltage Tolerance -4.0 +4.0 %

=6.3V, IO =5mA, TJ=25°C, C2 = 22µF unless otherwise specified.

IN

AMS500-X

Min. Typ. Max.

6.3V ≤VIN ≤25V, IO=100 mA ±± 5.0

+125°C

230°C

Units

%

Line Regulation

Load Regulation

Dropout Voltage

Quiescent Current

Output Noise Voltage
Output Bypass Capacitor
Ripple Rejection fO =120Hz 80 dB
Maximum Operational Input

Voltage
Maximum Line Transient

6V ≤VIN ≤ 15V
15V ≤VIN ≤ 25V
5mA ≤I
5mA ≤10 ≤ 200 mA

5mA ≤10 ≤ 350 mA
5mA ≤10 ≤ 500 mA
I

I
I
I

I
I
I
I

10Hz-100kHz, C
ESR=0.1 to 10Ω

RL = 500Ω, VO ≤ 5.5V
T = 1ms, τ ≤100ms

= 100 mA

O

= 200 mA

O

= 350 mA

O

= 500 mA

O

≤ 10 mA,

O

= 100 mA

O

≤ 200 mA

O

= 350 mA

O

≤ 100 mA

O

OUT

= 100µF

5
5

5
15
20
20

0.25

0.40

0.45

0.55

0.2
2
5

12
50

10

25 28 V

35 40 V

10
30

25
40
60
75

0.40

0.50

0.60

0.80

0.5
4

10

mV
mV

mV
mV
mV
mV

mV
mV

mV
mV

mA
mA
mA
mA

µV rms

µF

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone [phone] Fax [phone]

AMS500

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at V

PARAMETER CONDITIONS

Adjustable Version

Reference Voltage

Output Voltage Range 2 24 V
Line Regulation
Load Regulation

Dropout Voltage

Quiescent Current

Output Noise Voltage 10Hz-100kHz 100
Output Bypass Capacitor
Long Term Stability T =1000hr 0.4 %/1000hr
Ripple Rejection fO = 120Hz 0.02 dB
Maximum Operational Input

Voltage
Maximum Line Transient

On/Off Threshold Voltage
On
Off

On/Off Threshold Current V

=6V, V

IN

=3V IO =5mA, TJ=25°C, R1 =27k, C2 = 2µF unless otherwise specified.

OUT

AMS500-X

(Note 2)

IO ≤ 100 mA, -40°C ≤T
R1=27k, Measured from V

≤ 125°C,

J

OUT

to Adj. Pin

6V ≤VIN ≤ 25V
5mA ≤I

≤ 100 mA

O

5mA ≤10 ≤ 200 mA
5mA ≤10 ≤ 350 mA
5mA ≤10 ≤ 500 mA
I

= 100 mA

O

I

= 200 mA

O

I

= 350 mA

O

I

= 500 mA

O

I

= 0 mA,

O

I

= 100 mA

O

I

= 200 mA

O

I

= 350 mA

O

ESR=0.1 to 10Ω

IO = 10mA, Reference Voltage ≤ 1.5V
T = 1ms, τ ≤100ms
VO = 3V

= 2.4V 35 60

OFF

Min. Typ. Max.

1.20 1.235 1.27 V

1.180 1.235 1.290

.02 1.5 mV/V

0.3

0.5

1.0

1.0

0.05

0.3

0.5

0.6

0.18

2.0

5.0
12

10

21 22 V

35 40 V

1.8

2.5

2.0

Units

0.5
1

1.5

2.0

0.40

0.50

0.60

0.80

0.5
4

10

µV

1.5 V

V

%
%
%
%

V
V
V

V
mA
mA
mA
mA

rms

µF

V

µA

/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: 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 θ

J-A

and the

ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is calculated using:

P(MAX)θ=

AJ T-(MAX)T

A-J

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 [phone] Fax [phone]