Advanced Monolithic Systems AMS500 Service Manual

http://www.BDTIC.com/AMS

Advanced AMS500
Monolithic LOW COST 500mA 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

•••• 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

AMS500 series consists of positive fixed and adjustable voltage regulators ideally suited for use in battery-powered systems.

The
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, SOT-223 and 5 leads SOT-23 packages.

ORDERING INFORMATION

OUTPUT PAC

VOLTAGE

FIXED AMS500N-X AMS500L-X AMS500M1-X AMS500-X (R) -40ºC to +85 ºC

ADJ. AMS500M1 -40ºC to +85 ºC

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

3L TO-92 SOT-89 SOT-23-5 SOT-223

KAGE TYPE TEMP.

updated April 24, 2009

RANGE

http://www.BDTIC.com/AMS

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 25 sec)
Internal Power Dissipation (Note 4) Internally Limited ESD 2000V

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at V

PARAMETER

Fixed Output Voltage Versions

Output Voltage Tolerance -4.0 +4.0 %

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

N

I

CONDITIONS

6.3V ≤VIN ≤25V, IO=100 mA

AMS500-X

Min. Typ. Max.

±±±± 5.0

%

+125°C

265°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

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

10Hz-100kHz, C

ESR=0.1 to 10Ω

25 28 V

RL = 500Ω, VO ≤ 5.5V

T = 1ms, τ ≤100ms

≤ 100 mA

O

= 100 mA

= 200 mA

= 350 mA

= 500 mA

≤ 10 mA,

= 100 mA

≤ 200 mA

= 350 mA

= 100µF

OUT

5

5

5

15

20

20

0.2

50

10

35 40 V

250

400

450

550

2

5

12

10

30

25

40

60

75

400

500

600

800

0.5

4

10

mV

mV

mV

mV

mV

mV

mV

mV

mV

mV

mA

mA

mA

mA

µV rms

µF

updated April 24, 2009

http://www.BDTIC.com/AMS

AMS500

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at V

PARAMETER

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

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

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), 90°C/W for SOT-223 and
220°C/W for 5 lead SOT-23.

P(MAX)

=6V, V

IN

1.20 1.235 1.27 V

IO ≤ 100 mA, -40°C ≤T

R1=27k, Measured from V

6V ≤VIN ≤ 25V

5mA ≤I

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

OFF

=

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

OUT

CONDITIONS

(Note 2)

≤ 125°C,

J

to Adj. Pin

OUT

≤ 100 mA

O

= 2.4V 35 60

AJ

T-(MAX)T

A-J

θ

Min. Typ. Max.

1.180 1.235 1.290

.02 1.5 mV/V

0.3

0.18

10

21 22 V

35 40 V

2.5

AMS500-X

0.5

1.0

1.0

50

300

500

600

2.0

5.0

12

1.8

2.0

0.5

1

1.5

2.0

400

500

600

800

0.5

4

10

1.5

Units

µV

V

%

%

%

%

mV

mV

mV

mV

mA

mA

mA

mA

rms

µF

V

V

µA

/V

J-A

updated April 24, 2009