AP7333 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Description Features • • • • • • • • • • • • • • • 300mA Low Dropout Regulator in 3-pin package Very low IQ 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 VOUT VIN IN OUT AP7333 1uF GND AP7333 Rev. 2 1 of 12 www.diodes.com 1uF NOVEMBER 2009 © Diodes Incorporated AP7333 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Ordering Information AP7333 - XX XX G - 7 Output Package Green Packing 10 : 1.0V 12 : 1.2V 15 : 1.5V 18 : 1.8V 20 : 2.0V 25 : 2.5V 28 : 2.8V 30 : 3.0V 33 : 3.3V SA : SOT23 SR : SOT23R G : Green 7 : Tape & Reel Device Package Code AP7333-XXSAG-7 AP7333-XXSRG-7 Notes: SA SR Packaging (Note 2) SOT23 SOT23R 7” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 3000/Tape & Reel -7 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 ( Top View ) ( Top View ) IN 1 GND 1 3 GND 3 IN OUT 2 AP7333 Rev. 2 OUT 2 2 of 12 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7333 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Pin Descriptions Pin Number SOT23 SOT23R Pin Name IN 1 3 OUT 2 2 GND 3 1 Description Voltage input pin. Bypass to ground through at least 1µF capacitor Voltage output pin. Bypass to ground through 1µF ceramic capacitor Ground Functional Block Diagram IN OUT G ate D river C urre nt Lim it and T herm a l S hutdow n R V REF R GND AP7333 Rev. 2 3 of 12 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7333 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Absolute Maximum Ratings Symbol ESD HBM ESD MM VIN TOP TST PD TJ Parameter Human Body Model ESD Protection Machine Model ESD Protection Input Voltage Continuous Load Current Operating Junction Temperature Range Storage Temperature Range SOT23 Power Dissipation (Note 3) SOT23R Maximum Junction Temperature Ratings 6 400 7 Internal Limited -40 ~ 125 -65 ~150 600 540 150 Units kV V V °C °C mW mW °C Recommended Operating Conditions Symbol VIN IOUT TA Notes: Parameter Input voltage Output Current (Note 4) Operating Ambient Temperature Min 2 0 -40 Max 6 300 85 Unit V mA °C 3. Ratings apply to ambient temperature at 25°C 4. The device maintains a stable, regulated output voltage without a load current. AP7333 Rev. 2 4 of 12 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7333 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Electrical Characteristics o (TA = 25 C, VIN = VOUT +1V, CIN = 1uF, COUT = 1uF, unless otherwise stated) Symbol Test Conditions Min Typ. Max Unit IOUT = 0mA 55 75 ⎯ Input Quiescent Current μA IQ IOUT = 300mA 65 85 IOUT = 300mA 300 550 mV VDropout Dropout Voltage (Note 5) TA = -40oC to 85oC, -2 2 % VOUT Output Voltage Accuracy IOUT = 30mA ΔVOUT VIN = (VOUT +1V) to VIN-Max, 0.01 0.20 %/V Line Regulation IOUT = 1mA /ΔVIN/V VIN = (VOUT +1V) to VIN-Max, ΔVOUT Load Regulation -0.6 0.6 % IOUT from 1mA to 300mA /VOUT VIN = 0V to 2.0V, VOUT = 1V, Start-up Time 80 μs tST IOUT = 300mA VIN = [VOUT +1V]VDC + 0.5VppAC, 65 dB PSRR PSRR f = 100Hz, IOUT = 30mA VIN = VIN-Min to VIN-Max, 100 mA ISHORT Short-circuit Current VOUT < 0.2V Current Limit VOUT/ROUT = 1A 400 600 mA ILIMIT Thermal Shutdown Threshold 140 TSHDN °C Thermal Shutdown Hysteresis 15 THYS °C o SOT23 (Note 6) 207 C/W Thermal Resistance Junction-to-Ambient θJA o SOT23R (Note 6) 230 C/W Notes: Parameter 5. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below 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, 2oz copper, single sided. AP7333 Rev. 2 5 of 12 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7333 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics Quiescent Current vs Input Voltage Iload=0mA Line Regulation (% /V) 0.1 Output Voltage Variation (%/V) Output Current (mA) 60 Vout=2.5V 58 90℃ 56 54 52 25℃ 50 -45℃ 90℃ 0.06 0.02 -0.02 48 3 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4 5.7 6 -45℃ 3.5 4 4.5 5 5.5 Input Voltage (V) Input Voltage (V) Load Regulation (% ) Dropout Voltage 0.6 6 350 -45℃ 0.2 0 -0.2 25℃ Vout=2.5V Vin=Vout +1V -0.4 Vout=2.5V 300 Dropout Voltage (mV) 0.4 90℃ 250 200 150 25℃ 100 -45℃ 50 90℃ 0 -0.6 0 50 100 150 200 250 0 300 50 100 150 200 250 300 Output Current (mA) Output Current (mA) Current Limit vs Input Voltage Short Circuit vs Input Voltage 600 105 Vout=2.5V 100 -45℃ Current Limit (mA) Output Current (mA) 25℃ -0.1 2.7 Output Voltage Variation (%) Vout=2.5V Vin=Vout +1V -0.06 95 90 85 80 25℃ Ta=25℃ Vout=2.5V 550 500 450 90℃ 400 75 3.5 4 4.5 5 5.5 6 Input Voltage (V) AP7333 Rev. 2 6 of 12 www.diodes.com 3.5 4 4.5 5 5.5 6 Input Voltage (V) NOVEMBER 2009 © Diodes Incorporated AP7333 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued) PSRR PSRR 75 75 70 70 Vout=1V Vin=2V Cin=Cout=1uF Ta=25℃ 60 Vout=2.5V Vin=3.5V Cin=Cout=1uF Ta=25℃ 65 PSRR (dB) PSRR (dB) 65 55 50 60 55 50 45 45 40 40 35 35 0.1 1 10 100 0.1 1 10 100 Frequency (kHz) Frequency (kHz) Line Transient Response Line Transient Response Vin=3V to 2V (1V/div) Vin=2V to 3V (1V/div) Tr=10us Tr=10us Vout=1V (50mV/div) Vout=1V (50mV/div) Iout=300mA (300mA/div) Iout=300mA (300mA/div) Time (50us/div) AP7333 Rev. 2 Time (50us/div) 7 of 12 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7333 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued) Load Transient Response Load Transient Response Tr=Tf=10us Vin=3.5V Tr=Tf=10us Vin=2V Vout=2.5V (100mV/div) Vout=1V (100mV/div) Iout=1mA to 300mA (100mA/div) Iout=1mA to 300mA (100mA/div) Time (200us/div) Time (200us/div) Start-Up Time (No Load) Start-Up Time (300mA Load) Vin=0 to 3.5V (1V/div) Cin=Cout=1uF Vin=0 to 3.5V (1V/div) Cin=Cout=1uF Vout=2.5V (1V/div) Vout=2.5V (1V/div) Iout (300mA/div) Time (50us/div) AP7333 Rev. 2 Time (50us/div) 8 of 12 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7333 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator 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 VIN 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. 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. 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. 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. 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. 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 Thermal Shutdown Protection Thermal protection disables the output when the junction temperature rises to approximately +140°C, allowing the device AP7333 Rev. 2 Low Quiescent Current The AP7333, with multiples of fixed output voltage options, provides a versatile LDO solution for many portable applications. 9 of 12 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7333 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Marking Information (1) SOT23 and SOT23R ( Top View ) 3 XX Y W X 1 AP7333 Rev. 2 2 XX : Identification code Y : Year 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green 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 10 of 12 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7333 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Package Information (All Dimensions in mm) (1) Package Type: SOT23 and SOT23R AP7333 Rev. 2 11 of 12 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7333 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 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