AT1117资料

AT1117 Preliminary Product Information

1A Low Dropout Fast Response

Positive Adjustable Regulator

Features

• Guaranted Output Voltage Accuracy within 2%• Fast Transient Response

• Guaranteed Dropout Voltage at MultipleCurrrents

• Load Regulation : 0.1% Typ.• Line Regulation : 0.03% Typ.

• Low Dropout Voltage : 1.1V Typ. at I =1A• Trimmed Current Limit : 1A Typ. at Tj=125℃• On-Chip Thermal Limiting : 150℃ Typ.• Adjustable Output : 1.25~7.75V

• Standard 3-pin TO-252 , SOT-223 Power Pack-ages

General Description

The AT1117 is a low dropout three-terminaladjustable regulators with 1A output currentcapability. In order to obtain lower dropout voltageand faster transient response, which is critical forlow voltage applications, the AT1117 has beenoptimized. The device is available in an adjustableversion and fixed output voltages of 1.8V, 2.5V,2.85V, 3.3V and 5V, the output available voltagerange is from 1.25~7.75V with an input supplybelow 9V. Dropout voltage is guaranteed at amaximum of 1.2V at 1A.Current limit is trimmedto ensure specified output current and controlledshort-circuit current. On-chip thermal limitingprovides protection against any combination ofoverload that would create excessive junctiontemperatures. The AT1117 is available in theindustry standard 3-pin TO-252 the low profilesurface mount SOT-223 power packages whichcan be used in applications where space is limited.

Applications

• Active SCSI Terminators• Low Voltage Logic Supplies• Battery-Powered Circuitry

• Post Regulator for Switching Power Supply

Block Diagram

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.Tel: 886-3-563-0878 WWW: http://www.aimtron.com.twFax: 886-3-563-0879 Email: service@aimtron.com.tw1

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AT1117 Preliminary Product Information

1A Low Dropout Fast Response

Positive Adjustable Regulator

Pin Configuration

Front View for SOT-223 Front View for TO-252

AT1117

Ordering Information

Part numberAT1117-󰀀󰀀VAT1117-󰀀󰀀Y

PackageSOT-223TO-252

MarkingAT1117V××××××∆∆AT1117Y∆∆××××××

󰀀󰀀:Output Voltage 18:1.8V 25:2.5V 28:2.85V 33:3.3V 50:5.0V××××××:Date Code ∆∆: Output Voltage

Pin Description

Pin No.

Symbol

I/O

Description

123ADJ/GNDOUTIN--OIAdjust Pin / Ground pinRegulated voltage output pinSupply voltage input pin

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.Tel: 886-3-563-0878 WWW: http://www.aimtron.com.twFax: 886-3-563-0879 Email: service@aimtron.com.tw2

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AT1117 Preliminary Product Information

1A Low Dropout Fast Response

Positive Adjustable Regulator

Absolute Maximum Ratings

(TJ=+250C)

Parameter

Input voltage

Operating junction temperature rangeControl sectionPower transistorStorage temperatureLead Temperature（soldering, 10second）

SymbolVINTJ

Limits13.20 to 1250 to 150-65 to +150260UnitV℃℃℃℃

TSTGTL

Electrical Characteristics

(TJ=+250C)

Parameter

Reference Voltage

PartnumberAT1117AT1117-18AT1117-25

SymbolVREF

Condition

10mA≤IOUT≤1A,

1.5V≤ (VIN-VOUT) ≤10.75V0A ≤IOUT≤1A,3.3V≤VIN≤12V0A ≤IOUT≤1A,4.0V≤VIN≤12V0A ≤IOUT≤1A,4.35V≤VIN≤12V0A ≤IOUT≤1A,4.75V≤VIN≤12V0A≤IOUT≤1A,6.5V≤VIN≤12VIOUT=10mA,

1.5V≤ (VIN-VOUT) ≤10.75V(Note1)

IOUT=0A, 3.3V≤VIN≤12V(Note 1)

IOUT=0A, 4.0V≤VIN≤12V(Note 1)

IOUT=0A, 4.35V≤VIN≤12V(Note 1)

IOUT=0A, 4.75V≤VIN≤12V(Note 1)

IOUT=0A, 6.5V≤VIN≤12V(Note 1)

(VIN-VOUT)=3V,

10mA ≤IOUT≤1A (Note 1)VIN=3.3V, 0A ≤IOUT≤1A(Note 1)

Values

Unit

Min.Typ.Max.1.2251.2501.2751.7641.8001.8362.4502.5002.5502.7902.8502.9103.2353.3003.3655.1005.0004.900

0.03111110.11

0.26666100.410

VVVVVV%mVmVmVmVmV%mV

Output VoltageAT1117-28AT1117-33AT1117-50AT1117AT1117-18

VOUT

Line Regulation

AT1117-25AT1117-28AT1117-33AT1117-50

REGLINE

Load RegulationAT1117AT1117-18

REGLOAD

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.Tel: 886-3-563-0878 WWW: http://www.aimtron.com.twFax: 886-3-563-0879 Email: service@aimtron.com.tw3

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AT1117 Preliminary Product Information

1A Low Dropout Fast Response

Positive Adjustable Regulator

AT1117-25AT1117-28AT1117-33AT1117-50

Dropout VoltageCurrent Limit

Adjust Pin CurrentAdjust Pin CurrentMinimun Load CurrentRipple RejectionThermal RejectionTemperature StabilityLong Term StabilityRMS Output NoiseThermal Resistance

AT1117-18AT1117-25AT1117-28AT1117-33AT1117-50

VDILIMITIADJ∆IADJIoPSRRTRTSLSVNθJCIIN

VIN=4.0V, 0A ≤IOUT≤1A

1

(Note 1)

VIN=4.35V, 0A ≤IOUT≤1A

1

(Note 1)

VIN=4.75V, 0A ≤IOUT≤1A

1

(Note 1)

VIN=6.5V, 0A ≤IOUT≤1A

1

(Note 1)

IOUT=100mA (Note 2)1IOUT=500mA (Note 2)1.05IOUT=1A (Note 2)1.1(VIN-VOUT)=5V1000(VIN-VOUT)=3V, IOUT=10mA600A≤IOUT≤1A,

0.2

1.5V≤ (VIN-VOUT) ≤12V(VIN-VOUT)=12V (Note 1)1.7FRIPPLE120HZ, VRIPPLE=1VP-P,6075

(VIN-VOUT)=3VTJ=250.01=℃, 30ms Pulse

0.5

TJ=125℃, 1000Hrs0.3TJ=25℃, 10Hz≤F≤10KHz,(% of VOUT)

(Junction-to-Case, at Tab)VIN≤12VVIN≤12VVIN≤12VVIN≤12VVIN≤12V

0.0031555555

1010101010101010151.11.21.31205

mVmVmVmVVVVmAµAµAmAdB0.1

%/W%%%℃/WmAmAmAmAmA

Quiescent Current

Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Load line regulations are mea-sured at a constant junction temperature by low duty cycle pulse testing.

Note 2: Dropout voltage is specified over the full output current range of the device. Dropout voltage is defined as the minimuminput/output differential measured at the specified output current. Test points and limits are also shown on the Dropout Voltagecurve.

Note 3: Minimum load current is defined as the minimum output current required to maintain regulation.

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.Tel: 886-3-563-0878 WWW: http://www.aimtron.com.twFax: 886-3-563-0879 Email: service@aimtron.com.tw4

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AT1117 Preliminary Product Information

1A Low Dropout Fast Response

Positive Adjustable Regulator

Typical Application Circuit

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.Tel: 886-3-563-0878 WWW: http://www.aimtron.com.twFax: 886-3-563-0879 Email: service@aimtron.com.tw5

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AT1117 Preliminary Product Information

1A Low Dropout Fast Response

Positive Adjustable Regulator

Timing Curve

Load Transient Responce

Dropout Voltage vs Output Current

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.Tel: 886-3-563-0878 WWW: http://www.aimtron.com.twFax: 886-3-563-0879 Email: service@aimtron.com.tw6

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AT1117 Preliminary Product Information

1A Low Dropout Fast Response

Positive Adjustable Regulator

Output Voltage vs Input Voltage

Input Current vs Input Voltage

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.Tel: 886-3-563-0878 WWW: http://www.aimtron.com.twFax: 886-3-563-0879 Email: service@aimtron.com.tw7

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AT1117 Preliminary Product Information

1A Low Dropout Fast Response

Positive Adjustable Regulator

Input Current vs Temperature

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.Tel: 886-3-563-0878 WWW: http://www.aimtron.com.twFax: 886-3-563-0879 Email: service@aimtron.com.tw8

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AT1117 Preliminary Product Information

1A Low Dropout Fast Response

Positive Adjustable Regulator

Small Outline 3-pin Plastic SOT-223

SYMBOLAA1BB1cDEee1HLKαβINCHESMIN0.060.020.110.010.250.130.09BSC0.18BSC0.260.040.060○

13○

0.290.040.0810○MAX0.070.030.120.010.260.15MILLIMETERSMINMAX1.501.800.020.080.600.802.903.100.280.326.306.703.303.702.3BSC4.6BSC6.707.300.911.101.502.00○010○

13○

NOTES--------------2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.Tel: 886-3-563-0878 WWW: http://www.aimtron.com.twFax: 886-3-563-0879 Email: service@aimtron.com.tw9

元器件交易网www.cecb2b.com

AT1117 Preliminary Product Information

1A Low Dropout Fast Response

Positive Adjustable Regulator

Small Outline 3-pin Plastic TO-252

SYMBOLA

A1bb2CC1DEe1HLL1L2INCHESMIN0.0860.0350.0200.2050.0180.0180.2100.2500.1560.3700.0200.0250.035MAX0.0940.0500.0350.2150.0230.0230.2450.2650.2040.4100.0400.080MILLIMETERSMINMAX2.182.390.891.270.5080.895.2075.4610.460.580.460.585.3346.226.356.733.965.189.39810.410.510.641.020.892.032NOTES-------------2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878 WWW: http://www.aimtron.com.twFax: 886-3-563-0879 Email: service@aimtron.com.tw10