AT1117 AIMTRON | Alldatasheet

Document overview

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Technical content

Features

  • Guaranted Output Voltage Accuracy within 2%
  • Fast Transient Response
  • Guaranteed Dropout Voltage at Multiple Currrents
  • 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

Applications

  • Active SCSI Terminators
  • Low Voltage Logic Supplies
  • Battery-Powered Circuitry
  • Post Regulator for Switching Power Supply General Description The AT1117 is a low dropout three-terminal adjustable regulators with 1A output current capability. In order to obtain lower dropout voltage and faster transient respon se, which is critical for low voltage applications, the AT1117 has been optimized. The device is available in an adjustable version and fixed output voltages of 1.8V, 2.5V, 2.85V, 3.3V and 5V, the output available voltage range is from 1.25~7.75V with an input supply below 9V. Dropout voltage is guaranteed at a maximum of 1.2V at 1A.Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload that would create excessive junction temperatures. The AT1117 is available in the industry standard 3-pin TO-252 the low profile surface mount SOT-223 pow er packages which can be used in applications where space is limited. Block Diagram

Preliminary Product Information 1A Low Dropout Fast Response Positive Adjustable Regulator Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Pin Configuration Front View for SOT-223 Front View for TO-252 AT1117

Ordering Information

Part number Package Marking AT1117-V SOT-223 AT1117V AT1117-Y TO-252 AT1117Y Pin Description Pin No. Symbol I/O Description

1 ADJ/GND -- Adjust Pin / Ground pin

2 OUT O Regulated voltage output pin

3 IN I Supply voltage input pin

Preliminary Product Information 1A Low Dropout Fast Response Positive Adjustable Regulator Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Absolute Maximum Ratings (T J=+250C) Parameter Symbol Limits Unit Input voltage V IN 13.2 V Operating junction temperature range Control section Power transistor TJ 0 to 125 0 to 150 Storage temperature T STG -65 to +150 ℃ Lead Temperature （ soldering, 10 second） TL 260 ℃

Electrical Characteristics

(TJ=+250C) ValuesParameter Part number Symbol Condition Min. Typ. Max. Unit Reference V oltage AT1117 V REF 10mA≤IOUT≤1A, AT1117-18 0A ≤IOUT≤1A, 3.3V≤VIN≤12V 1.764 1.800 1.836 V AT1117-25 0A ≤IOUT≤1A, 4.0V≤VIN≤12V 2.450 2.500 2.550 V AT1117-28 0A ≤IOUT≤1A, 4.35V≤VIN≤12V 2.790 2.850 2.910 V AT1117-33 0A ≤IOUT≤1A, 4.75V≤VIN≤12V 3.235 3.300 3.365 V Output V oltage AT1117-50 VOUT 0A≤IOUT≤1A, 6.5V≤VIN≤12V 5.100 5.000 4.900 V AT1117 IOUT=10mA, 1.5V≤ (VIN-VOUT) ≤10.75V (Note1) 0.03 0.2 % AT1117-18 IOUT=0A, 3.3V≤VIN≤12V (Note 1) 16 m V AT1117-25 IOUT=0A, 4.0V≤VIN≤12V (Note 1) 16 m V AT1117-28 IOUT=0A, 4.35V≤VIN≤12V (Note 1) 16 m V AT1117-33 IOUT=0A, 4.75V≤VIN≤12V (Note 1) 16 m V Line Regulation AT1117-50 REGLINE IOUT=0A, 6.5V≤VIN≤12V (Note 1) 11 0 m V AT1117 (VIN-VOUT)=3V , 10mA ≤IOUT≤1A (Note 1) 0.1 0.4 %Load Regulation AT1117-18 REGLOAD VIN=3.3V, 0A ≤IOUT≤1A (Note 1) 11 0 m V

Preliminary Product Information 1A Low Dropout Fast Response Positive Adjustable Regulator Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw AT1117-25 VIN=4.0V, 0A ≤IOUT≤1A (Note 1) 11 0 m V AT1117-28 VIN=4.35V, 0A ≤IOUT≤1A (Note 1) 11 0 m V AT1117-33 VIN=4.75V, 0A ≤IOUT≤1A (Note 1) 11 0 m V AT1117-50 VIN=6.5V, 0A ≤IOUT≤1A (Note 1) 11 5 m V IOUT=100mA (Note 2) 1 1.1 V IOUT=500mA (Note 2) 1.05 1.2 VDropout V oltage V D IOUT=1A (Note 2) 1.1 1.3 V Current Limit ILIMIT (VIN-VOUT)=5V 1000 mA Adjust Pin Current I ADJ (VIN-VOUT)=3V , IOUT=10mA 60 120 µA Adjust Pin Current ∆IADJ 0A≤IOUT≤1A, 1.5V≤ (VIN-VOUT) ≤12V 0.2 5 µA Minimun Load Current Io (V IN-VOUT)=12V (Note 1) 1.7 mA Ripple Rejection PSRR FRIPPLE=120HZ, V RIPPLE=1VP-P, (VIN-VOUT)=3V 60 75 dB Thermal Rejection T R TJ=25℃, 30ms Pulse 0.01 0.1 %/W Temperature Stability T S 0.5 % Long Term Stability L S TJ=125℃, 1000Hrs 0.3 % RMS Output Noise V N TJ=25℃, 10Hz≤F≤10KHz, (% of VOUT) 0.003 % Thermal Resistance θJC (Junction-to-Case, at Tab) 15 ℃/W AT1117-18 V IN≤12V 5 10 mA AT1117-25 V IN≤12V 5 10 mA AT1117-28 V IN≤12V 5 10 mA AT1117-33 V IN≤12V 5 10 mA Quiescent Current AT1117-50 IIN VIN≤12V 5 10 mA 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 minimum input/output differential measured at the specified output current. Test points and limits are also shown on the Dropout Voltage curve. Note 3: Minimum load current is defined as the minimum output current required to maintain regulation.

Preliminary Product Information 1A Low Dropout Fast Response Positive Adjustable Regulator Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Typical Application Circuit

Preliminary Product Information 1A Low Dropout Fast Response Positive Adjustable Regulator Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Timing Curve Load Transient Responce Dropout V oltage vs Output Current

Preliminary Product Information 1A Low Dropout Fast Response Positive Adjustable Regulator Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Output V oltage vs Input V oltage Input Current vs Input V oltage

Preliminary Product Information 1A Low Dropout Fast Response Positive Adjustable Regulator Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Input Current vs Temperature

Preliminary Product Information 1A Low Dropout Fast Response Positive Adjustable Regulator Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Small Outline 3-pin Plastic SOT-223 INCHES MILLIMETERSSYMBOL MIN MAX MIN MAX NOTES A 0.06 0.07 1.50 1.80 - A1 0.02 0.08 - B 0.02 0.03 0.60 0.80 - B1 0.11 0.12 2.90 3.10 - c 0.01 0.01 0.28 0.32 - D 0.25 0.26 6.30 6.70 - E 0.13 0.15 3.30 3.70 - e 0.09BSC 2.3BSC - e1 0.18BSC 4.6BSC - H 0.26 0.29 6.70 7.30 - L 0.04 0.04 0.91 1.10 - K 0.06 0.08 1.50 2.00 - α 0○ 10○ 0○ 10○ - β 13○ 13○ -

Preliminary Product Information 1A Low Dropout Fast Response Positive Adjustable Regulator Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Small Outline 3-pin Plastic TO-252 INCHES MILLIMETERSSYMBOL MIN MAX MIN MAX NOTES A 0.086 0.094 2.18 2.39 - A1 0.035 0.050 0.89 1.27 - b 0.020 0.035 0.508 0.89 - b2 0.205 0.215 5.207 5.461 - C 0.018 0.023 0.46 0.58 - C1 0.018 0.023 0.46 0.58 - D 0.210 0.245 5.334 6.22 - E 0.250 0.265 6.35 6.73 - e1 0.156 0.204 3.96 5.18 - H 0.370 0.410 9.398 10.41 - L 0.020 0.51 - L1 0.025 0.040 0.64 1.02 - L2 0.035 0.080 0.89 2.032 -