AMS500L-30 - Advanced Monolithic Systems

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

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) SOT-89

(L) 5 Lead SOT-23

(M1)

OUTPUT INPUT

GND 123

OUTPUTGNDINPUT

INPUT OUTPUT

ON/OFF ADJ / N/C

GROUND

Bottom View Top View Top View

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS500

ABSOLUTE MAXIMUM RATINGS (Note 1)

Input Voltage Maximum Junction Temperature +125°C

Operating 25V Storage Temperature -65°C to +150°C

Overvoltage Protection 26V to 40V Lead Temperature (Soldering 10 sec) 230°C

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

ELECTRICAL CHARACTERISTICS

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

AMS500-X

PARAMETER CONDITIONS Min. Typ. Max. Units

Fixed Output Voltage Versions

Output Voltage Tolerance -4.0 +4.0 %

6.3V ≤VIN ≤25V, IO=100 mA ±± 5.0 %

Line Regulation 6V ≤VIN ≤ 15V

15V ≤VIN ≤ 25V

Load Regulation 5mA ≤IO ≤ 100 mA

5mA ≤10 ≤ 200 mA

5mA ≤10 ≤ 350 mA

5mA ≤10 ≤ 500 mA

Dropout Voltage IO = 100 mA

IO = 200 mA

IO = 350 mA

IO = 500 mA

0.25

0.40

0.45

0.55

0.40

0.50

0.60

0.80

Quiescent Current IO ≤ 10 mA,

IO = 100 mA

IO ≤ 200 mA

IO = 350 mA

0.2

0.5

Output Noise Voltage 10Hz-100kHz, COUT = 100µF50 µV rms

Output Bypass Capacitor ESR=0.1 to 10Ω10 µF

Ripple Rejection fO =120Hz 80 dB

Maximum Operational Input

Voltage 25 28 V

Maximum Line Transient RL = 500Ω, VO ≤ 5.5V

T = 1ms, τ ≤100ms 35 40 V

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.

AMS500-X

PARAMETER CONDITIONS

(Note 2) Min. Typ. Max. Units

Adjustable Version

Reference Voltage 1.20 1.235 1.27 V

IO ≤ 100 mA, -40°C ≤TJ ≤ 125°C,

R1=27k, Measured from VOUT to Adj. Pin 1.180 1.235 1.290 V

Output Voltage Range 2 24 V

Line Regulation 6V ≤VIN ≤ 25V .02 1.5 mV/V

Load Regulation 5mA ≤IO ≤ 100 mA

5mA ≤10 ≤ 200 mA

5mA ≤10 ≤ 350 mA

5mA ≤10 ≤ 500 mA

0.3

0.5

1.0

0.5

1.5

2.0

Dropout Voltage IO = 100 mA

IO = 200 mA

IO = 350 mA

IO = 500 mA

0.05

0.3

0.5

0.6

0.40

0.50

0.60

0.80

Quiescent Current IO = 0 mA,

IO = 100 mA

IO = 200 mA

IO = 350 mA

0.18

2.0

5.0

0.5

Output Noise Voltage 10Hz-100kHz 100 µVrms/V

Output Bypass Capacitor ESR=0.1 to 10Ω10 µF

Long Term Stability T =1000hr 0.4 %/1000hr

Ripple Rejection fO = 120Hz 0.02 dB

Maximum Operational Input

Voltage 21 22 V

Maximum Line Transient IO = 10mA, Reference Voltage ≤ 1.5V

T = 1ms, τ ≤100ms

35 40 V

On/Off Threshold Voltage

Off

VO = 3V

2.5

1.8

2.0

1.5 V

On/Off Threshold Current VOFF = 2.4V 35 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:

A-J

AJT-(MAX)T

P(MAX) θ

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

6.0

Low Voltage Behavior

2.0

3.0

4.0

5.0

INPUT VOLTAGE (V)

AMS500-3.3

2.0 3.0 4.0 5.0 6.0

IO = 500mA

0 40 80

0.6

0.4

0.2

Dropout Voltage

120

JUNCTION TEMPERATURE (° C)

INPUT OUTPUT DIFFERENTIAL (V)

0.1

0.5

0.3

IO = 100mA

0 300

0.6

0.4

0.2

Dropout Voltage

600

OUTPUT CURRENT (mA)

INPUT OUTPUT DIFFERENTIAL (V)

0.1

0.5

0.3

OUTPUT VOLTAGE (V)

IO = 150mA

IO = 200mA

400 500200100

IO = 350mA

-1

-20 -10 0 10 20 30 40 50 60

INPUT VOLTAGE (V)

Output at Voltage Extremes

OUTPUT VOLTAGE (V)

AMS500-5.0

RL=500m

Ω

-1

-20 -10 0 10 20 30 40 50 60

INPUT VOLTAGE (V)

Output at Voltage Extremes

OUTPUT VOLTAGE (V)

AMS500-3.3

RL=500m

Ω

6.0

Low Voltage Behavior

2.0

3.0

4.0

5.0

INPUT VOLTAGE (V)

AMS500-5.0

2.0 3.0 4.0 5.0 6.0

IO = 500mA

OUTPUT VOLTAGE (V)

0 10 20

1200

800

400

Peak Output Current

INPUT VOLTAGE (V)

OUTPUT CURRENT (mA)

200

1000

600

TJ= 25°C

1 10 100 1k 10k 100k 1M

FREQUENCY (Hz)

Ripple Rejection

RIPPLE REJECTION (dB)

75 C2 = 100

ALUM

IO= 10mA

C2 = 22

TANTALUM

1.20

1.30 Reference Voltage

1.12

1.14

1.16

1.18

1.22

1.24

1.26

1.28

OUTPUT VOLTAGE (V)

REFERENCE VOLTAGE (V)

3 6 9 12 15 18 21 240

1.10

AMS500 ADJUSTABLE

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS500

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

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 V

: 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

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)

ADJ +

AMS500

ADJUSTABLE

GND

10µ

OUT

OFF

ON/OFF R1

28k

VOUT

VIN

100k

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 V

OUT

The output voltage can be set by the two resistors R1 and R2

using the following equation:











+

=R1R2R1

VV REFO

The value of R1 is recommended to be between 25kΩ to 30 kΩ,

and the value of R2 will set the output voltage.

-40 40 80 120

QUIESCENT CURRENT (mA)

Quiescent Current

TEMPERATURE (° C)

0 100 200

Quiescent Current

300

OUTPUT CURRENT (mA)

QUIESCENT CURRENT (mA)

VIN = 6V 20

IO = 50mA

IO = 0mA

50 150 250 350

IO = 100mA

IO = 200mA

-2.5

2.5

5.0

17.5

0 1 2 4 5 6 7 8 10

INPUT VOLTAGE (V)

Quiescent Current

QUIESCENT CURRENT (µA)

7.5

12.5

IO= 10mA

3 9

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.

3L TO-92 PLASTIC PACKAGE (N)

SOT-89 PLASTIC PACKAGE (L)

0.140±0.010

(3.556±0.127)

0.060±0.010

(1.524±0.254)

0.015±0.002

(0.381±0.051)

0.016±0.003

(0.406±0.076)

0.050±0.005

(1.270±0.127)

0.060±0.005

(1.524±0.127)

DIA

0.180±0.005

(4.572±0.127)

0.180±0.005

(4.572±0.127)

0.050

(1.270)

MAX

0.500

(12.70)

MIN UNCONTROLLED

LEAD DIMENSIONS

10°

NOM

5° NOM

N (TO-92 ) AMS DRW# 042391

0.90

(2.286)

NOM

0.090-0.102

(2.29-2.60)

0.173-0.181

(4.40-4.60)

0.064-0.072

(1.62-1.83)

0.155-0.167

(3.94-4.25)

0.059

(1.50)

BSC

0.035-0.047

(0.89-1.20)

L (SOT-89 ) AMS DRW# 042392

0.118

(3.00)

BSC

0.014-0.019

(0.36-0.48)

0.017-0.022

(0.44-0.56)

0.084-0.090

(2.13-2.29)

0.055-0.063

(1.40-1.60) 0.014-0.017

(0.35-0.44)

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)

0.059-0.070

(1.50-1.75)

0.014-0.020

(0.350-0.50)

0.110-0.120

(2.794-3.048)

0.102-0.118

(2.60-3.00)

0.037

(0.95)

TYP

0.075

(1.90)

TYP

0.018-0.024

(0.457-0.610)

10°

NOM

0.0035-0.0080

(0.090-0.20)

(SOT-23-5 ) AMS DRW# 051001

0.036-0.051

(0.090-1.30)

0.003

(0.150)

MAX

0.018-0.024

(0.457-0.610)

10°

NOM