PDF AME1117CCGT Data sheet ( Hoja de datos )

Número de pieza	AME1117CCGT
Descripción	1A Low Dropout Positive Voltage Regulator
Fabricantes	Analog Microelectronics
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No Preview Available ! Analog Microelectronics, Inc. AME1117 1A Low Dropout Positive Voltage Regulator nGeneral Descriptions The AME1117 is a 1A low-dropout positive voltage regu- lator. It is available in fixed and adjustable output voltage versions. Overcurrent and thermal protection are integrated onto the chip. Output current will limit as while it reaches the pre-set current or temperature limit. The dropout voltage is specified at 1.4V Maxi- mum at full rated output current. The AME1117 series provides excellent regulation over line, load and tem- perature variations. nKey Features l Low dropout voltage ..............1.2V at 1A l Adjustable or fixed voltages 2.5V, 3.3V, 5.0V l Typical line regulation ....... 0.2% l Typical load regulation ...... 0.15% l Adjust pin current less than 90µA l Overcurrent protection l Thermal protection l Available in TO-220, TO-252, SOT-223 nApplications l High Efficiency Linear Regulators l 5V to 3.3V Voltage Converter l Battery Charger l Post Regulators for Switching Supplies nFunctional Block Diagram Input C u rre n t Lim iting Am plifier n Typical Application 4.75V to 12V AME1117 GND 10µF Tan 10µF Tan Load Therm al P ro te c tio n O u tp u t Error Am p. Bandgap ADJ/COM R e fe re n c e Input range depends on VOUT Please refer to electrical characteristics. Figure 1 Figure 2 1 1 page Analog Microelectronics, Inc. AME1117 1A Low Dropout Positive Voltage Regulator AME1117BXXX P a ra m e te r Output voltage Line regulation Load regulation Dropout voltage Symbol VO Test conditions VIN = 5V, IO = 0A Min. TJ = 25oC 2.475 Over Temp. 2.450 Typ. 2.500 2.500 Max. 2.525 2.550 RegLINE VIN = 4.75~7V, IO = 0A TJ = 25oC - - 0.2 RegLOAD VIN = 5V, IO = 0A~1A VD IO = 0A~1A, ∆Vo = ±1% TJ = 25oC Over Temp. TJ = 25oC Over Temp. - - - - 0.05 0.2 1.2 1.3 0.3 0.4 1.4 - Unit V % V Current limit Quiescent Current Temp. Coefficient Temperature stability RMS output noise Ripple rejection ratio IS IQ TC TS VN RA VIN = 4.75~7V, Over Temp. VIN = 5V, IO = 0A~1A, Over Temp. VIN = 4.75~7V, IO = 0A~1A VIN = 5V, IO = 100mA, Over Temp. TJ = 25oC VIN = 5V, IO = 1A, Over Temp. 1.0 - - A - 6 13 mA - 0.005 - %/”C - 0.5 - % - 0.003 - %VO 60 72 - dB AME1117CXXX P a ra m e te r Output voltage Line regulation Load regulation Dropout voltage Symbol VO RegLINE RegLOAD VD Test conditions VIN = 5V, IO = 0A VIN = 4.75~7V, IO = 0A VIN = 5V, IO = 0A~1A IO = 0A~1A, ∆Vo = ±1% Min. TJ = 25oC 3.270 Over Temp. 3.234 TJ = 25oC - TJ = 25oC Over Temp. - - TJ = 25oC - Over Temp. - Typ. 3.300 3.300 - 0.05 0.2 1.2 1.3 Max. 3.330 3.366 0.2 0.3 0.4 1.4 - Unit V % V Current limit Quiescent Current Temp. coefficient Temperature stability RMS output noise Ripple rejection ratio IS IQ TC TS VN RA VIN = 4.75~7V, Over Temp. VIN = 5V, IO = 0A~1A, Over Temp. VIN = 4.75~7V, IO = 0A~1A VIN = 5V, IO = 100mA, Over Temp. TJ = 25oC VIN = 5V, IO = 1A, Over Temp. 1.0 - -A - 6 13 mA - 0.005 - %/”C - 0.5 - % - 0.003 - %VO 60 72 - dB Line regulation test circuit 5 5 Page Analog Microelectronics, Inc. AME1117 n Advanced Applications Adjustable Output Voltage 1A Low Dropout Positive Voltage Regulator VIN = 5V 1 0 µF AME1117 VIN VOUT ADJ * 10 µF R1 R2 1K 2K * VO = 1.5 ~ 3.45V 1 0 µF * VO = Vref (1 + R2/R1) + Iadj X R2 ** Optional for improved ripple rejection Paralleling Regulators V IN 1 0 µF * 20mΩ VIN AME1117 VOUT GND VO IO = 0 to 2A 1 0 µF VIN AME1117 VOUT * 20mΩ GND * 20mΩis ballast resistance The inter-connection of #18 wire could act as ballast resistance. 11 11 Page

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