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Advanced AMS222 Monolithic COMPLIMENTARY OUTPUT OSCILLATOR/CLOCK GENERATOR Systems

RoHS compliant FEATURES APPLICATIONS • Low-Cost, Oscillator/Clock Generator • Switch-Mode Power Supplies • Simple User Programming • Servers • Output frequency programmable from 10 kHz to 6MHz • Printers • 2.7 to 15V Single-Supply Operation • Embedded Microcontrollers • Output frequency tolerance <1% • Industrial Controls • Complementary output signal • Automotive Applications • Break before make output signal • Toys GENERAL DESCRIPTION The AMS222 is a low-cost, oscillator intended to be used as an external clock for low-frequency applications. The device consists of a resistor-programmed oscillator with complementary output stage. An external resistor allows for output frequency range to be adjusted from 10kHz to 6MHz. The complimentary output stage is very useful in paralleling, switching regulators for doubling the output current. AMS222 is offered in SOT-23 5-leads package. ORDERING INFORMATION: PIN CONNECTIONS

MAX. PACKAGE TYPE OPERATING OFFSET 5 LEAD SOT-23 TEMP. RANGE

15mV AMS222AM1 -40 to +125°C TYPICAL APPLICATION

AMS222 used to SYNC. AMS4155 to >400KHz

5L SOT-23 (M1)

Top View

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AMS222

ABSOLUTE MAXIMUM RATINGS (Note 1) Voltage Range on VCC -0.5V to +16V Operating Temperature Range -40ºC to +125ºC Storage Temperature Range -55ºC to +125ºC Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS Electrical Characteristics at TA = -40ºC to +125ºC and VCC = +3.0C to 5.5V unless otherwise noted.

PARAMETER

CONDITIONS

AMS222 Min. Typ. Max.

Units

Supply Current CL = 15pF, VCC = 3.3V, RSET = 12.5 KΩ CL = 15pF, VCC = 5.5V, RSET = 12.5 KΩ

1.0 1.0

1.2 1.5

mA

High-Level Output Voltage (OUT)

IOH = -1.5mA

VCC = 3.3V 2.5V

V

Low-Level Output Voltage (OUT) IOH = -1.5mA 0.4 V

AC ELECTRICAL CHARACTERISTICS Electrical Characteristics at TA = -40ºC to +125ºC and VCC = +3.0C to 5.5V unless otherwise noted.

PARAMETER

CONDITIONS

AMS222 Min. Typ. Max.

Units

Output Frequency Tolerance VCC = 3.3V, TA = +25ºC -1.0 +1.0 %

Voltage Frequency Variation

TA = +25ºC, RSET = 12.5 KΩ VCC = 3.3V to 5.0 V (Note 2) TA = +25ºc, RSET = 12.5 KΩ VCC = 5.0V to 10V (Notes 2)

-0.25

-0.5

+0.25

+0.5 %

Temperature Frequency Variation VCC = 3.3V (Note 3) -2.0 +2.0 % Load Capacitance (Note 4) 30 pF Output Duty Cycle 10kHz to 1MHz, TA = +25ºC (Note 3)

1MHz to 2 MHz (Note 4) 48 46

49.5 48

%

Output Rise/Fall Time CL = 15pF, VCC = 3.3V 20 30 ns Note 1: All voltage referenced to ground. Note 2: This is the change observed in output frequency due to changes in voltage. Note 3: Parameter is guaranteed by design and is not production tested. Note 4: Output voltage swings can be impaired at high frequencies combined with high output loading.

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AMS222

TYPICAL CHARACTERISTICS

Channel 2 Rise and Channel 1 Fall Time @ VCC = 3.3V, C1 = 15pF Channel 1 Rise and Channel 2 Fall Time @ VCC= 3.3V, C1= 15pF

Break before make Approximate 520mV @ VCC= 3.3V, C1= 15pF Channel 1 and 2 Waveform @ 500 KHz, VCC= 3.3V, C1= 15pF Channel 1 Duty Cycle @ VCC= 3.3V, C1= 15pF Channel 2 Duty Cycle @ VCC= 3.3V, C1= 15pF

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AMS222 TYPICAL CHARACTERISTICS (continued) Channel 1 and Channel 2 Waveform @ VCC = 5V, C1= 15pF VCC= 5.0V, C1 = 15pF Channel 1 Fall Time Channel 2 Rise Time VCC = 5.0V, C1= 15pF Waveform @ 4MHz and VCC= 3.3V (vertical scale 500mV/div) Channel 2 Fall Time Channel 1 Rise Time

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AMS222 TYPICAL CHARACTERISTICS (continued)

2.9

2.8

2.7

2.6

2.52.5 2.0 1.5 1.0 0.5 0

VCC = 3.3V

OUTPUT VOLTAGE HIGH vs. OUTPUT CURRENT

OUTPUT CURRENT (mA)

50.0

49.5

49.0

48.5

48.0-40 -15 10 50 100 125

DUTY CYCLE vs.TEMPERATURE

TEMPERATURE (ºC)

R= 12.5KW, VCC= 3.3V

1.0

0.5

0

-0.5

-1.0

2 4 6 8 10 12SUPPLY VOLTAGE (V)

FREQUENCY ERRORvs. SUPPLY VOLTAGE (FROM 3.3V)

TA= +25ºC

12.5KW

1.70

1.45

1.20

0.95

0.702.0 4.0 6.0 8.0 10.0 12.0

12.5KW

CL=15pF, TA=+25ºC

SUPPLY CURRENT vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

0.4

0.3

0.2

0.1

00 0.5 1.0 1.5 2.0 2.5

VCC = 3.3V

OUTPUT VOLTAGE LOW vs. OUTPUT CURRENT

OUTPUT CURRENT (mA)

1.50

1.30

1.10

0.90

0.70

0.50-40 -15 10 50 100 125

CL=15pF, VCC=3.3V

12.5KW

TEMPERATURE (ºC)

SUPPLY CURRENT vs. TEMPERATURE2.0

1.5

1.25

1.0

05 10 15 20 25 30 35 40

TA= +25ºC, RSET = 40W

10V

5V

3.3V

2.7V

SUPPLY CURRENT vs. OUTPUT LOADING

LOAD CAPACITANCE (pF)

0.9

0.8

0.7

0.6

0.5

0.4

0.33.0 5.0 7.0 9.0 11.0 13.0

OUTPUT FREQUENCYvs. SUPPLY VOLTAGE

TA= +25ºC

SUPPLY VOLTAGE (V)

0.7

0.6

0.5

0.4

0.3

0.2

0.1-40 -15 -10 50 100 125

VCC = 3.3V

TEMPERATURE (ºC)

OUTPUT FREQUENCYvs. TEMPERATURE

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AMS222 TYPICAL CHARACTERISTICS (continued)

1.0

0.5

0

-0.5

-1.0

-40 -15 -10 50 100 125

VCC = 3.3V

TEMPERATURE (ºC)

12.5KW

FREQUENCY ERRORvs. TEMPERATURE (FROM +25ºC)

1 10 100 1000

1

2

3

4

5

6

FSET Resistor

OUTPUT FREQUENCY vs. R-FSET

TYPICAL APPLICATION CIRCUIT

AMS222 used as Clock Signal to Synchronize two Switching Regulators

PRODUCT DESCRIPTION AMS222 is a silicon clock generator with complementary output, programmable frequency using a single resistor from 10KHz to 6MHz. The Output B is 180º phase from Output A, and the signals do not overlap does allow to drive critical circuits where break-before-make is very important. It operates from as low as 2.7V to high 15V consuming just 1.2mA of power. The output drive is capable to drive capacitive loads up to 50pF and resistive loads up to 3mA. The high stability of the output frequency and it’s immunity to supply variation is due to internal temperature compensated voltage reference. Having a good power supply rejection ratio, the device works very well in electrically noisy environments. The only critical element is the Fset resistor that should be placed as close as possible to the package to avoid parasitic capacitance and PCB traces cross-talk.

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AMS222

PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.

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