AP033 ANACHIP | Alldatasheet
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1.5A Low Dropout Positive Fixed-Mode Regulator AP033 This datasheet contains new product information. Anachip Corp. 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.1.0 Aug.27, 2004 Features
- 3-Terminal and Fixed 3.3V
- 1.4V Maximum Dropout at Full Load Current.
- Fast Transient Response.
- Built-in Thermal Shutdown.
- Output Current Limiting. Applications
- PC peripheral
- Communication General Description AP033 is a low dropout positive fixed-mode regulator with minimum of 1.5A 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. AP033 is guaranteed to have <1.4V dropout at full load current making it ideal to provide well regulated outputs of 3.3V with 4.7V to 12V input supply by different output voltage. Ordering Information AP 033 X X X LDO Regulator Package Packing 033 Vout = 3.3V D : TO252-3L Blank : Tube A : Taping Lead Free Blank : Normal L : Lead Free Package Pin Assignments
3 PIN TO252
Pin Descriptions Name Pin # Function VIN 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 1.4V higher than VOUT in order for the device to regulate properly. GND Ground VOUT The output of the regulator. A minimum of 10µF capacitor must be connected from this pin to ground to insure stability. Ground
1.5A Low Dropout Positive Fixed-Mode Regulator AP033 Anachip Corp. Block Diagram THERMAL SHUTDOWN Vout GND 1.25V CURRENT LIMIT Vin Absolute Maximum Ratings Symbol Parameter Rating Unit Vin DC Supply Voltage -0.3 to 14 V PD Power Dissipation Internally Limited TST Storage Temperature -65 to +150 oC TOP Operating Junction Temperature Range 0 to +150 oC Electrical Characteristics (Under Operating Conditions) Parameter Conditions Min. Typ. Max. Units Output Voltage VIN = 5V, IOUT = 0mA, TJ = 25oC 4.7V<VIN<12V, 0<IOUT<1.5A 3.267 3.235 3.300 3.300 3.333 3.365 V V Line Regulation 4.7V<VIN<12V, IOUT = 0mA, TJ=25oC 0.5 1.0 mV mV Load Regulation VIN = 5V, 0<IOUT<1.5A, TJ=25oC (Notes1.2) mV mV Dropout Voltage (VIN-VOUT) ∆VOUT, ∆VREF = 1%, IOUT =1.5A (Note 3) 1.3 1.4 V Current Limit (VIN-VOUT)>1.4V, ∆VOUT=100mV (Note 4) 1.6 A Quiescent Current VIN <12V mA Thermal Regulation TA=25 oC, 30ms pulse 0.008 0.04 %/W F=120Hz, COUT=25uF Tantalum, IOUT=1.5A Ripple Rejection AP033 VIN=6.3V dB Temperature Stability 0.5 Thermal Resistance Junction-to-Ambient (No heat sink ;No air flow) TO-252 101 oC/W Thermal Resistance Junction-to-Case TO-252: Control Circuitry/Power Transistor oC/W Note 1: 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. Note 2: Line and load regulation are guaranteed up to the maximum power dissipation of 2W. Power dissipation is determined by the input/output differential and the output current. Note 3: Dropout voltage is specified over the full output current range of the device. Note 4: AP033 is guaranteed to operate at higher peak current than 1.6 Amp. See the thermal regulation specifications for changes in output voltage due the heating effects.
1.5A Low Dropout Positive Fixed-Mode Regulator AP033 Anachip Corp. Typical Application 5V to 3.3V Fixed Mode Regulator 3.3V/ 1.5A Tab is GND AP033 VOUT GND VIN 100uF 100uF Function Description Introduction The AP033 fixed-mode Low Dropout (LDO) regulator is a 3 terminal device. The AP033 only needs 1.4V differential between VIN and VOUT to maintain output regulation. In addition, the output voltage tolerances are also extremely tight and they include the transient response as part of the specification. For example, Intel VRE specification calls for a total of +/- 100mV including initial tolerance, load regulation and 0 to 1.5A load step. The AP033 is specifically designed to meet the fast current transient needs as well as providing an accurate initial voltage, reducing the overall system cost with the need for fewer output capacitors. Load Regulation Since the AP033 is only a 3 terminal device, it is not possible to provide true remote sensing of the output voltage at the load. But it can supply good load regulation by internal feedback bypass the external loss such as adjustable mode. Stability The AP033 requires the use of an output capacitor as part of the frequency compensation in order to make the regulator stable. For most applications a minimum of 10uF aluminum electrolytic capacitor insures both stability and good transient response. Thermal Design The AP033 incorporates an internal thermal shutdown that protects the device when the junction temperature exceeds the maximum allowable junction temperature. Although this device can operate with junction temperatures in the range of 150oC, it is recommended that the selected heat sink be chosen such that during maximum continuous load operation the junction temperature is kept below the temperature. Layout Consideration The output capacitors must be located as close to the VOUT terminal of the device as possible. It is recommended to use a section of a layer of the PC board as a plane to connect the VOUT pin to the output capacitors to prevent any high frequency oscillation that may result due to excessive trace inductance.
1.5A Low Dropout Positive Fixed-Mode Regulator AP033 Anachip Corp. Typical Performance Characteristics Dropout Voltage (VIN-VOUT) 0.2 0.4 0.6 0.8 1.2 1.4 200 400 600 800 Output Current (mA) Dropout Voltage (V) TJ=25oC TJ=125oC Load Regulation -1.8 -1.6 -1.4 -1.2 -0.8 -0.6 -0.4 -0.2 -25 100 Temperature(oC) Output Voltage Deviation(%) ILOAD=1.5A Temperature Stability -1.5 -0.5 0.5 1.5 -50 -25 100 125 150 Temperature (oC) Output Voltage Chang (%) Line regulation 0.2 0.4 0.6 0.8 Input Voltage(V) Output Voltage Deviation(%) AP033 Load Transient Response -30 -20 -10 100 Output Voltage Dev iation (m V) 100 TIME(µs) Load C urrent(A) C IN=10µF C OU T=10µF Tantalum VIN=4.8V Preload=0.1A AP033 Line Transient Response 4.5 5.5 6.5 7.5 100 120 140 160 180 200 Input Voltage (V) CIN=1µF COUT=10µF Tantalum -40 -20 100 120 140 160 180 200 TIME(µs) Output Voltage D ev iation(m V)
1.5A Low Dropout Positive Fixed-Mode Regulator AP033 Anachip Corp. Marking Information AP033 Part Number Logo ID Code Xth Week: 01~52 Year: (Top view) "02" = 2002 "01" = 2001 X X X X X X Blank: normal L: Lead Free Package TO252-3L Package Dimension TO252-3L E e b D H A C SEATING PLANE SEE NOTE2 L 5.6 11.0 5.6 2.0 2.25 Land Pattern Recommendation (Unit: mm) 7.2 1.2 Notes: JEDEC Outline: TO-252 AB Mils suggested for positive contact at mounting. Dimensions In Millimeters Dimensions In Inches Symbol Min. Nom. Max. Min. Nom. Max. A 2.18 2.29 2.39 0.086 0.090 0.094 1.02 1.15 1.27 0.040 0.045 0.050 b 0.61 TYP. 0.024 TYP. 5.20 5.35 5.50 0.205 0.211 0.217 C 0.46 0.52 0.58 0.018 0.020 0.023 0.46 0.52 0.58 0.018 0.020 0.023 D 5.33 5.57 5.80 0.210 0.219 0.228 E 6.35 6.58 6.80 0.250 0.259 0.268 e 2.25 BSC. 0.089 BSC. 4.50 BSC. 0.177 BSC. H 9.00 9.70 10.40 0.354 0.382 0.409 L 0.51 0.020 0.64 0.83 1.02 0.025 0.033 0.040 1.52 1.78 2.03 0.060 0.070 0.080