Not Recommended for New Design

Transcription

1 Features.4V maximum dropout at full load current Fast transient response Output current limiting Built-in thermal shutdown Packages: TO22-5, TO252-5, TO263-5, SOP8 Good noise rejection Fixed Output.5V,.8V, 2.5V, 3.3V, 5.V, 9.V, 2V Enable function Applications PC peripheral Communication CDROM.. General Description is a low dropout positive fixed-mode regulator with minimum of A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications such as high-speed bus termination and low current 3.3V logic supply. is also well suited for other applications such as VGA cards. is guaranteed to have <.4V dropout at full load current making it ideal to provide well regulated outputs of.25 to 2V with up to 8V input supply. The offers a TTL Logic compatible enable pin. Ordering Information AP 8 X XX X X Low Dropout Regulator Package D : TO252-5L T : TO22-5L K : TO263-5L S : SOP-8L 5 :.5V 8 :.8V 25 : 2.5V 33 : 3.3V 5 : 5.V 9 : 9.V 2 : 2V Lead Free Blank : Normal L : Lead Free Package Packing Blank : Tube A : Taping Typical Circuit 5V C uf Tab is Vin EN NC GND C2 uf 3.3V/A ( 5V/3.3V fixed output ) This datasheet contains new product information. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev.. Feb. 5, 25 /

2 Connection Diagram 5 PIN TO22 5 PIN TO252/TO263 ( Top View ) 5 Vin 4 EN 3 2 NC GND 5 Vin 4 EN 3 2 NC GND Tab is Tab is SOP-8L ( Top View ) 5 4 Vin 6 3 EN GND Pin Descriptions NAME GND Vin EN NC FUNCTION Ground. The output of the regulator. A minimum of uf capacitor must be connected from this pin to ground to insure stability. The input pin of regulator. Typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load transient response. This pin must always be.3v higher than in order for the device to regulate properly. The input pin of regulator. TTL/CMOS compatible input Logic high = disable output, Logic Low or open = output enable. (internal pull-down resistor~ K). No connection. 2/

3 Absolute Maximum Ratings Characteristics Symbol Values Unit DC Supply Voltage Vin -.3 to 8 V Enable Pin Voltage V EN 7 V Power Dissipation P D Internally Limited Storage Temperature T ST -65 to +5 o C Operating Junction Temperature Range T OP. to +5 o C Electrical Characteristics (Under Operating Conditions) PARAMETER CONDITIONS MIN TYP MAX UNIT -.5 3V V IN 5V V V V IN 5V V V V IN 5V V Output Voltage V V IN 5V V V V IN 5V V -9..5V V IN 8V V V V IN 8V V Line Regulation -XXX I O =ma,v OUT +.5V<V IN <8V, T J =25 o C.2 % -.5 V IN =3V, ma<io<a, 2 5 mv -.8 V IN =3.3V, ma<io<a, 5 8 mv -2.5 V IN =4V, ma<io<a, 2 25 mv Load Regulation -3.3 V IN = 5V, I OUT A, mv -5. V IN = 8V, I OUT A, 4 5 mv -9. V IN =2V, I OUT A, 7 9 mv -2. V IN =5V, I OUT A, 2 mv Dropout Voltage -.5/.8 (V IN -V OUT ) 2.5/3.3/5./9./2 I OUT = A, V OUT =.V.3.4 V 3/

4 Electrical Characteristics(Continued) (Under Operating Conditions) PARAMETER CONDITIONS MIN TYP MAX UNIT -.5/.8 Current Limit (V 2.5/3.3/5./9./2 IN -V OUT ) = 5V. A Minimum Load Current -XXX o C Tj 25 o C 5 ma V EN I EN Enable Input Voltage Enable Input Current Logic Low (ON).8 Logic High (OFF).6 V EN =.8V V EN = 2.V 8 Thermal Regulation T A =25 O C, 3ms pulse.8.4 %/W V µa Ripple Rejection F=2Hz,C OUT =25uF Tantalum, I OUT =A -XXX V IN =V OUT +3V 6 7 db Temperature Stability I O =ma.5 % θ JA Thermal Resistance Junction-to-Ambient(No heat sink ;No air flow) SOP-8L TO-252-5L TO-22-5L TO263-5L O C/W θ JC Thermal Resistance Junction-to-Case SOP-8L TO-252-5L TO-22-5L TO263-5L : Control Circuitry/Power Transistor / O C/W Note: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead = /8 from the package. Note2: Line and load regulation are guaranteed up to the maximum power dissipation of 5W. Power dissipation is determined by the input/output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range. Note3: Quiescent current is defined as the minimum output current required to maintain regulation. At 2V input/output differential the device is guaranteed to regulate if the output current is greater than ma. 4/

5 Typical Performance Characteristics Dropout Voltage (V) Tj = 25 o C Tj = 25 o C Output Voltage Deviation (%) I load=8ma Output Current (ma) Dropout Voltage vs Output Current Temperature ( o C) Load Regulation vs Temperature Output Voltage Change (%) Temperature ( o C) Percent Change in Output Voltage vs Temperature Output Voltage Deviation (%) Input Voltage (V) Line Regulation Output Voltage Deviation (mv) Input Voltage (V) 7.5 Cin=uF 6.5 Cout=uF Tantalum TIME (us) Line Transient Response Load Current (A) Output Voltage Deviation (mv) C in = uf C out = uf Tantalum Preload = ma TIME (us) Load Transient Response 5/

6 Marking Information () TO22-5L ( Top view ) 8-XX: Voltage 8-5:.5V 8-8:.8V 8-25: 2.5V 8-33: 3.3V 8-5: 5.V 8-9: 9.V 8-2: 2V 8-XX XX XX X X Logo Blank: normal L: Lead Free Package ID code Xth week: ~52 Year: "" = 2 "2" = 22 ~ (2) TO252/TO263-5L (Top view) 8-XX: Voltage 8-5:.5V 8-8:.8V 8-25: 2.5V 8-33: 3.3V 8-5: 5.V 8-9: 9.V 8-2: 2V 8- XX X X X X X X Logo Blank: normal L: Lead Free Package ID Code Xth Week: ~52 Year: "" = 2 "2" = 22 ~ (3) SOP-8L Logo 8-XX: Voltage 8-5:.5V 8-8:.8V 8-25: 2.5V 8-33: 3.3V 8-5: 5.V 8-5: 9.V 8-2: 2V (Top view) 8 -XX XX XX X X Blank: normal L: Lead Free Package ID Code Xth week: ~52 Year: "" = 2 "2" = 22 ~ 6/

7 Package Dimension () TO22-5 E ΦP A F L D H Q e e b C J Symbol Dimensions In Millimeters Dimensions In Inches Min. Nom. Max. Min. Nom. Max. A b C D E e e F H J L Øp Q /

8 (2) TO252-5 A B 5.6 D M S G H 2. C P(TYP.).6.27 Land Pattern Recommendation (Unit: mm) K L J Symbol Dimensions In Millimeters Dimensions In Inches Min. Nom. Max. Min. Nom. Max. A B C D P.27 REF..5 REF. S G H J K L M /

9 (3) TO263-5 E.9 L D L2 e B..7 Land Pattern Recommendation (Unit: mm) C2 C A L Symbol Dimensions In Millimeters Dimensions In Inches Min. Nom. Max. Min. Nom. Max. A B C C D E e L L L /

10 (4) SOP-8 E H L VIEW "A" 7 (4X) D.5x45 7 (4X) A2 A e B A y C VIEW "A" Symbol Dimensions In Millimeters Dimensions In Inches Min. Nom. Max. Min. Nom. Max. A A A B C D E e H L y θ O - 8 O O - 8 O /