AP7333 DIODES | Alldatasheet

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Technical content

300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator AP7333 Rev. 2 1 of 12 NOVEMBER 2009 www.diodes.com © Diodes Incorporated

  • 300mA Low Dropout Regulator in 3-pin package
  • Very low I Q over full load: 65µA
  • Wide input voltage range: 2V to 6V
  • Fixed output options: 1.0V to 3.3V
  • PSRR: 65dB typical at 100Hz
  • Fast start-up time: 80µs
  • Stable with low ESR, 1µF ceramic output capacitor
  • Excellent Load/Line Transient Response
  • Low dropout: 300mV typical at 300mA
  • Current limit protection
  • Short circuit protection
  • Thermal shutdown protection
  • Ambient temperature range: -40ºC to 85°C
  • SOT23 and SOT23R: Available in “Green” Molding Compound (No Br, Sb)
  • Lead Free Finish/RoHS Compliant (Note 1) The AP7333 is a 300mA, fixed output voltage, low dropout linear regulator. The device included pass element, error amplifier, band-gap, current limit and thermal shutdown circuitry. The characteristics of low dropout voltage and low quiescent current make it suitable for low power applications, for example, battery powered devices. The typical quiescent current is approximately 65μA. Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions. The AP7333 is available in SOT23 packages with different pin-outs.

Applications

  • XDSL Router
  • Wireless LAN Cards
  • Desktop and Notebook Computers
  • Battery Powered Equipments
  • Mouse, Keyboards Typical Application Circuit 1uF IN GND OUT 1uF VIN VOUT AP7333 Features Description

300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator AP7333 Rev. 2 2 of 12 NOVEMBER 2009 www.diodes.com © Diodes Incorporated

Ordering Information

SA : SOT23 G : Green 7 : Tape & Reel SR : SOT23R 10 : 1.0V Output 12 : 1.2V 15 : 1.5V 18 : 1.8V 25 : 2.5V 28 : 2.8V 30 : 3.0V 33 : 3.3V 20 : 2.0V Device Package Code Packaging (Note 2) 7” Tape and Reel Quantity Part Number Suffix AP7333-XXSAG-7 SA SOT23 3000/Tape & Reel -7 AP7333-XXSRG-7 SR SOT23R 3000/Tape & Reel -7 Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. Pin Assignment (1) SOT23 (1) SOT23R GND ( Top View ) IN 1 OUT 2 IN ( Top View ) GND 1 OUT 2

300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator AP7333 Rev. 2 3 of 12 NOVEMBER 2009 www.diodes.com © Diodes Incorporated Pin Descriptions Pin Name Pin Number Description SOT23 SOT23R IN 1 3 Voltage input pin. Bypass to ground through at least 1µF capacitor OUT 2 2 Voltage output pin. Bypass to ground through 1µF ceramic capacitor GND 3 1 Ground Functional Block Diagram IN GND OUT Gate Driver VREF Current Limit and Thermal Shutdown R R

300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator AP7333 Rev. 2 4 of 12 NOVEMBER 2009 www.diodes.com © Diodes Incorporated Absolute Maximum Ratings Symbol Parameter Ratings Units ESD HBM Human Body Model ESD Protection 6 kV ESD MM Machine Model ESD Protection 400 V VIN Input Voltage 7 V Continuous Load Current Internal Limited TOP Operating Junction Temperature Range -40 ~ 125 °C TST Storage Temperature Range -65 ~150 °C PD Power Dissipation (Note 3) SOT23 600 mW SOT23R 540 mW TJ Maximum Junction Temperature 150 °C Recommended Operating Conditions Symbol Parameter Min Max Unit VIN Input voltage 2 6 V IOUT Output Current (Note 4) 0 300 mA TA Operating Ambient Temperature -40 85 °C Notes: 3. Ratings apply to ambient temperature at 25°C 4. The device maintains a stable, regulated output voltage without a load current.

300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator AP7333 Rev. 2 5 of 12 NOVEMBER 2009 www.diodes.com © Diodes Incorporated

Electrical Characteristics

(TA = 25 o C, VIN = VOUT +1V, CIN = 1uF, COUT = 1uF, unless otherwise stated) Symbol Parameter Test Conditions Min Typ. Max Unit IQ Input Quiescent Current IOUT = 0mA ⎯ 55 75 μA IOUT = 300mA 65 85 VDropout Dropout Voltage (Note 5) IOUT = 300mA 300 550 mV VOUT Output Voltage Accuracy TA = -40oC to 85oC, IOUT = 30mA -2 2 % ΔVOUT /ΔVIN/V Line Regulation VIN = (VOUT +1V) to VIN-Max, IOUT = 1mA 0.01 0.20 %/V ΔVOUT /VOUT Load Regulation VIN = (VOUT +1V) to VIN-Max, IOUT from 1mA to 300mA -0.6 0.6 % tST Start-up Time VIN = 0V to 2.0V, VOUT = 1V, IOUT = 300mA 80 μs PSRR PSRR VIN = [VOUT +1V]VDC + 0.5VppAC, f = 100Hz, IOUT = 30mA 65 dB ISHORT Short-circuit Current VIN = VIN-Min to VIN-Max, VOUT < 0.2V 100 mA ILIMIT Current Limit VOUT/ROUT = 1A 400 600 mA TSHDN Thermal Shutdown Threshold 140 °C THYS Thermal Shutdown Hysteresis 15 °C θJA Thermal Resistance Junction-to-Ambient SOT23 (Note 6) 207 oC/W SOT23R (Note 6) 230 oC/W Notes: 5. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% bel ow its nominal value. This parameter only applies to output voltages above 1.8V. 6. Test conditions for SOT23 and SOT23R: Device mounted on FR-4 substrate PCB, with minimum recommended pad layout, 2o z copper, single sided.

300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator AP7333 Rev. 2 6 of 12 NOVEMBER 2009 www.diodes.com © Diodes Incorporated Typical Performance Characteristics Quiescent Current vs Input Voltage Iload=0mA Input Voltage (V) Output Current (mA) Line Regulation (% /V) -0.1 -0.06 -0.02 0.02 0.06 0.1 3.5 4 4.5 5 5.5 6 Input Voltage (V) Output Voltage Variation (%/V) Load Regulation (%) -0.6 -0.4 -0.2 0.2 0.4 0.6 0 50 100 150 200 250 300 Output Current (mA) Output Voltage Variation (%) Dropout Voltage 100 150 200 250 300 350 0 50 100 150 200 250 300 Output Current (mA) Dropout Voltage (mV) Short Circuit vs Input Voltage 100 105 3.5 4 4.5 5 5.5 6 Input Voltage (V) Output Current (mA) Current Limit vs Input Voltage 400 450 500 550 600 3.5 4 4.5 5 5.5 6 Input Voltage (V) Current Limit (mA) 90℃ -45℃ 25℃ -45℃ 90℃ 25℃ 25℃ -45℃ 90℃ 90℃ -45℃ 25℃ 90℃ 25℃ -45℃ Vout=2.5V Vout=2.5V Vin=Vout +1V Vout=2.5V Vin=Vout +1V Vout=2.5V Vout=2.5V Ta=25℃ Vout=2.5V

300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator AP7333 Rev. 2 7 of 12 NOVEMBER 2009 www.diodes.com © Diodes Incorporated Typical Performance Characteristics (Continued) PSRR 0.1 1 10 100 Frequency (kHz) PSRR (dB) PSRR 0.1 1 10 100 Frequency (kHz) PSRR (dB) Line Transient Response Time (50us/div) Line Transient Response Time (50us/div) Vout=1V (50mV/div) Vin=2V to 3V (1V/div) Tr=10us Vout=1V (50mV/div) Iout=300mA (300mA/div) Vin=3V to 2V (1V/div) Tr=10us Iout=300mA (300mA/div) Vout=1V Vin=2V Cin=Cout=1uF Ta=25℃ Vout=2.5V Vin=3.5V Cin=Cout=1uF Ta=25℃

300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator AP7333 Rev. 2 8 of 12 NOVEMBER 2009 www.diodes.com © Diodes Incorporated Typical Performance Characteristics (Continued) Load Transient Response Time (200us/div) Load Transient Response Time (200us/div) Start-Up Time (No Load) Time (50us/div) Start-Up Time (300mA Load) Time (50us/div) Vin=0 to 3.5V (1V/div) Cin=Cout=1uF Vout=2.5V (1V/div) Vout=1V (100mV/div) Iout=1mA to 300mA (100mA/div) Tr=Tf=10us Vin=3.5V Iout=1mA to 300mA (100mA/div) Tr=Tf=10us Vin=2V Vout=2.5V (100mV/div) Vout=2.5V (1V/div) Iout (300mA/div) Vin=0 to 3.5V (1V/div) Cin=Cout=1uF

300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator AP7333 Rev. 2 9 of 12 NOVEMBER 2009 www.diodes.com © Diodes Incorporated Application Note Input Capacitor A 1μF ceramic capacitor is recommended to connect between VIN and GND pins to decouple input power supply glitch and noise. The amount of the capacitance may be increased without limit. This input capacitor must be located as close as possible to the device to assure input stability and less noise. For PCB layout, a wide copper trace is required for both V IN and GND. A lower ESR capacitor allows the use of less capacitance, while higher ESR type requires more capacitance. Output Capacitor The output capacitor is required to stabilize and help transient response for LDO. The AP7333 is stable with very small ceramic output capacitors. The recommended capacitance is from 1μF to 4.7μF, Equivalent Series Resistance (ESR) is from 10mΩ to 200mΩ, and temperature characteristic is X7R or X5R. Higher capacitance values help to improve load/line transient response. The output capacitance may be increased to keep low undershoot/overshoot. Place output capacitor as close as possible to OUT and GND pins, and keep the leads as short as possible. No Load Stability No minimum load is required to keep the device stable. The device will remain stable and regulated in no load condition. Current Limit Protection When output current at OUT pin is higher than current limit threshold, the current limit protection will be triggered and clamp the output current to approximately 600mA to prevent over-current and to protect the regulator from damage due to overheating. Short Circuit Protection When OUT pin is short-circuit to GND or OUT pin voltage is less than 200mV, short circuit protection will be triggered and clamp the output current to approximately 100mA. This feature protects the regulator from over-current and damage due to overheating. Thermal Shutdown Protection Thermal protection disables the output when the junction temperature rises to approximately +140°C, allowing the device to cool down. When the junction temperature reduces to approximately +125°C the output circuitry is enabled again. Depending on power dissipation, thermal resistance, and ambient temperature, the thermal protection circuit may cycle on and off. This cycling limits the heat dissipation of the regulator, protecting it from damage due to overheating. Ultra Fast Start-up After turned on, the AP7333 is able to provide full power in as little as tens of microseconds, typically 80µs, without sacrificing low ground current. This feature will help load circuitry move in and out of standby mode in real time, eventually extend battery life for mobile phones and other portable devices. Fast Transient Response Fast transient response LDOs can also extend battery life. TDMA-based cell phone protocols such as Global System for Mobile Communications (GSM) have a transmit/receive duty factor of only 12.5 percent, enabling power savings by putting much of the baseband circuitry into standby mode in between transmit cycles. In baseband circuits, the load often transitions virtually instantaneously from 100µA to 100mA. To meet this load requirement, the LDO must react very quickly without a large voltage drop or overshoot — a requirement that cannot be met with conventional, general-purpose LDOs. The AP7333’s fast transient response from 0 to 300mA provides stable voltage supply for fast DSP and GSM chipset with fast changing load. Small Overshoot and Undershoot The AP7333 has small and controlled overshoot and undershoot in load and line transitions. This helps to protect supplied circuit from damage and operation error caused by glitches. This feature also permits the usage of small value output decoupling capacitor with AP7333. Low Quiescent Current The AP7333, consuming only around 65µA for all input range and output loading, provides great power saving in portable and low power applications. Wide Output Options The AP7333, with multiples of fixed output voltage options, provides a versatile LDO solution for many portable applications.

300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator AP7333 Rev. 2 10 of 12 NOVEMBER 2009 www.diodes.com © Diodes Incorporated Marking Information (1) SOT23 and SOT23R 1 2 XX Y W X ( Top View ) XX : Identification code W : Week : A~Z : 1~26 week; X : A~Z : Green Y : Year 0~9 a~z : 27~52 week; z represents 52 and 53 week Device Package Identification Code AP7333-10SA SOT23 JR AP7333-12SA SOT23 JS AP7333-15SA SOT23 JT AP7333-18SA SOT23 JU AP7333-20SA SOT23 JV AP7333-25SA SOT23 JW AP7333-28SA SOT23 JX AP7333-30SA SOT23 JY AP7333-33SA SOT23 JZ AP7333-10SR SOT23R RA AP7333-12SR SOT23R RB AP7333-15SR SOT23R RC AP7333-18SR SOT23R RD AP7333-20SR SOT23R RE AP7333-25SR SOT23R RF AP7333-28SR SOT23R RG AP7333-30SR SOT23R RH AP7333-33SR SOT23R RJ

300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator AP7333 Rev. 2 11 of 12 NOVEMBER 2009 www.diodes.com © Diodes Incorporated Package Information (All Dimensions in mm) (1) Package Type: SOT23 and SOT23R

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