AP7335A

AP7335A 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Description The AP7335A is a 300mA, 5.0V fixed output voltage, low dropout linear regulator with ±1% output voltage accuracy. The device included pass element, error amplifier, band-gap, current limit and thermal shutdown circuitry. The device is turned on when EN pin is set to logic high level. 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 35μA. Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions. This device is only available as 5.0V fixed version. Please contact your local sales office for any other voltage options. The AP7335A is packaged in SOT25 and DFN2020-6. Pin Assignments N EW PRODUCT Features • • • • • • • • • • • • • 300mA Low Dropout Regulator with EN Very low IQ 35µA Fixed output at 5.0V o VIN MIN 5.5V High PSRR: 65dB at 1kHz Fast start-up time 220µs Stable with low ESR, 1µF ceramic output capacitor Excellent Load/Line Transient Response Low dropout 150mV at 300mA Current limit and short circuit protection Thermal shutdown protection Ambient temperature range -40ºC to 85°C SOT25, and DFN2020-6 Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1) Applications • • • • • • • Smart Phones MP3/MP4 Battery-powered devices Bluetooth headset Battery Charger LCD TV Multifunction Monitors Note: 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. Typical Application Circuit V IN IN OUT V OUT AP7335 1 uF Enable EN GND 1uF Fixed Output AP7335A Document number: DS35267 Rev. 2 - 2 1 of 12 www.diodes.com July 2011 © Diodes Incorporated AP7335A 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Pin Descriptions Pin Number Pin Name IN GND EN ADJ NC OUT SOT25 (fixed) 1 2 3 4 5 DFN2020-6 (fixed) 3 2 1 5, 6 4 Description Voltage input pin. Bypass to ground through at least 1µF MLCC capacitor Ground Enable input, active high Output feedback pin No connection Voltage output pin. Bypass to ground through 1µF MLCC capacitor N EW PRODUCT Functional Block Diagram IN Current Limit and Thermal Shutdown OUT EN Gate Driver R 0.8V R GND Fixed Version AP7335A Document number: DS35267 Rev. 2 - 2 2 of 12 www.diodes.com July 2011 © Diodes Incorporated AP7335A 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Absolute Maximum Ratings Symbol ESD HBM ESD MM VIN Parameter Human Body Model ESD Protection Machine Model ESD Protection Input Voltage OUT, EN Voltage Continuous Load Current per Channel TST Storage Temperature Range Maximum Junction Temperature Ratings 2000 200 6.5 VIN + 0.3 Internal Limited -65 to 150 150 °C °C Unit V V V V N EW PRODUCT TJ Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time. Recommended Operating Conditions Symbol VIN IOUT TA Notes: Parameter Input voltage (Note 3) Output Current (Note 2) Operating Ambient Temperature Min 2 (Note 3) 0 -40 Max 6 300 85 Unit V mA °C 2. The device maintains a stable, regulated output voltage without a load current. 3. VIN(MIN) = 5.5V for 5.0V, VOUT at 300mA IOUT AP7335A Document number: DS35267 Rev. 2 - 2 3 of 12 www.diodes.com July 2011 © Diodes Incorporated AP7335A 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Electrical Characteristics (TA = 25 C, VIN = 5.5 to 6V, CIN = 1μF, COUT = 1μF, VEN = 2V, unless otherwise stated) Symbol Parameter Test Conditions VOUT ΔVOUT /ΔVIN/V Output Voltage Accuracy Line Regulation Load Regulation TA = -40 C to 85 C, IOUT = 10% of IOUT-Max VIN = 5.5V to 6V, VEN = VIN, IOUT = 1mA VIN = 5.5V to 6V, IOUT = 1mA to 300mA IOUT = 300mA VEN = VIN, IOUT = 0mA VEN = 0V, IOUT = 0mA VEN = 0V, OUT grounded VEN = 0V to 2.0V in 1μs, IOUT = 300mA VIN = 5.5VDC + 0.5VppAC, f = 1kHz, IOUT = 50mA VIN = VIN-Min to VIN-Max, ISHORT Short-circuit Current VOUT < 0.2V (fixed) or VIN = VIN-Min to VIN-Max, VOUT/ROUT = 1.2A VIN = VIN-Min to VIN-Max VIN = VIN-Min to VIN-Max VIN = 0V or VIN-Max 1.4 -1 145 15 SOT25 (Note 5) DFN2020-6 (Note 5) 187 251 o o o o Min -1 Typ. Max 1 Unit % %/V % mV μA μA μA μs dB 0.02 -0.6 150 35 0.1 0.1 220 65 0.20 0.6 200 80 1 1 N EW PRODUCT ΔVOUT /VOUT IQ ISHDN ILEAK tST PSRR VDROPOUT Dropout Voltage (Note 4) Input Quiescent Current Input Shutdown Current Input Leakage Current Start-up Time PSRR 160 mA ILIMIT VIL VIH IEN TSHDN THYS θJA Notes: Current limit EN Input Logic Low Voltage EN Input Logic High Voltage EN Input Current Thermal shutdown threshold Thermal shutdown hysteresis Thermal Resistance Junction-to-Ambient 400 650 0.4 1 mA V V μA °C °C C/W 4. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 1% below its nominal value. 5. Test condition for all packages: Device mounted on FR-4 substrate PC board, 1oz copper, with minimum recommended pad layout. AP7335A Document number: DS35267 Rev. 2 - 2 4 of 12 www.diodes.com July 2011 © Diodes Incorporated AP7335A 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Typical Performance Characteristics Start-Up Time Start-Up Time VEN=0 to 2V (1V/div) VIN=5.5V CIN=COUT=1μF VEN=0 to 2V (1V/div) VIN=5.5V CIN=COUT=1μF N EW PRODUCT VOUT=5.0V (2V/div) with no load VOUT=5.0V (2V/div) with 300mA load Time (40μs/div) Line Transient Response Time (40μs/div) Line Transient Response VIN=5.5V to 6.0V (1V/div) Tr=Tf=2μs CIN=none, COUT=1μF VIN=5.5V to 6.0V (1V/div) Tr=Tf=2μs CIN=none, COUT=1μF VOUT=5.0V (10mV/div) VOUT=5.0V (10mV/div) IOUT=30mA(50mA/div) Time (40μs/div) Load Transient Response VIN=VEN=5.5V CIN=COUT=1μF Tr=Tf=1μs VOUT=5.0V (100mV/div) IOUT=300mA(200mA/div) Time (40μs/div) Load Transient Response VIN=VEN=5.5V CIN=COUT=1μF Tr=Tf=1μs VOUT=5.0V (100mV/div) IOUT=10mA to 150mA (200mA/div) IOUT=10mA to 300mA (200mA/div) Time (100μs/div) AP7335A Document number: DS35267 Rev. 2 - 2 Time (100μs/div) 5 of 12 www.diodes.com July 2011 © Diodes Incorporated AP7335A 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Typical Performance Characteristics (cont.) PSRR Dropout Voltage vs Output Current 200 80 70 60 PSRR(dB) 50 40 30 20 10 0 0.1 1 10 Frequency(kHz) 100 IOUT=50mA Dropout Voltage(mV) 150 VOUT=5.0V 90°C N EW PRODUCT 100 25°C 50 VIN=5.5V+0.5VppAC VOUT=5.0V CIN=none, COUT=1μF TA=25°C IOUT=300mA -45°C 0 0 50 100 150 200 Output Current(mA) 250 300 Short-circuit Current vs Temperature 200 Current limit vs Temperature 800 VIN=5.5V Short-circuit Current(mA) Current limit(mA) 175 700 150 600 125 500 VIN=5.5V VOUT=5.0V 100 -50 -25 0 25 50 75 Temperature(℃ ) 100 125 400 -50 -25 0 25 50 75 100 125 Temperature(℃ ) AP7335A Document number: DS35267 Rev. 2 - 2 6 of 12 www.diodes.com July 2011 © Diodes Incorporated AP7335A 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Application Note Input Capacitor A 1μF ceramic capacitor is recommended between IN 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 reduce noise. For PCB layout, a wide copper trace is required for both IN and GND pins. A lower ESR capacitor type allows the use of less capacitance, while higher ESR type requires more capacitance. 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 650mA 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, short circuit protection will be triggered and clamp the output current to approximately 160mA. This feature protects the regulator from over-current and damage due to overheating. N EW PRODUCT Output Capacitor The output capacitor is required to stabilize and improve the transient response of the LDO. The AP7335A is stable with very small ceramic output capacitors. Using a ceramic capacitor value that is at least 1μF with ESR > 15mΩ on the output ensures stability. Higher capacitance values help to improve line and load transient response. The output capacitance may be increased to keep low undershoot and overshoot. Output capacitor must be placed as close as possible to OUT and GND pins. Thermal Shutdown Protection Thermal protection disables the output when the junction temperature rises to approximately +145°C, allowing the device to cool down. When the junction temperature reduces to approximately +130°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. Region of Stable COUT ESR vs. Load Current 100 Unstable Range 10 COUT ESR (Ω) 1 0.1 0.01 Unstable Range Ultra Fast Start-up stable Range VIN=5.5V CIN=COUT=1μF After enabled, the AP7335A is able to provide full power in as little as tens of microseconds, typically 220µs, 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 250 300 0.001 0 50 100 150 200 Load Current (mA) No Load Stability No minimum load is required to keep the device stable. The device will remain stable and regulated in no load condition. Fast transient response LDO can 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 LDO. The AP7335A’s fast transient response from 0 to 300mA provides stable voltage supply for fast DSP and GSM chipset with fast changing load. ON/OFF Input Operation The AP7335A is turned on by setting the EN pin high, and is turned off by pulling it low. If this feature is not used, the EN pin should be tied to IN pin to keep the regulator output on at all time. To ensure proper operation, the signal source used to drive the EN pin must be able to swing above and below the specified turn-on/off voltage thresholds listed in the Electrical Characteristics section under VIL and VIH. Low Quiescent Current The AP7335A, consuming only around 35µA for all input range, provides great power saving in portable and low power applications. July 2011 © Diodes Incorporated AP7335A Document number: DS35267 Rev. 2 - 2 7 of 12 www.diodes.com AP7335A 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Application Note (cont.) Power Dissipation The device power dissipation and proper sizing of the thermal plane that is connected to the thermal pad is critical to avoid thermal shutdown and ensure reliable operation. Power dissipation of the device depends on input voltage and load conditions and can be calculated by: PD = (VIN - VOUT) X IOUT The maximum power dissipation, handled by the device, depends on the maximum junction to ambient thermal resistance, maximum ambient temperature, and maximum device junction temperature, which can be calculated by the following equation: PD (max@TA) = ( +145°C - TA ) R θJA N EW PRODUCT Ordering Information AP7335A - XX XX - X Output 50 : 5.0V Package SN : DFN2020-6 Packing 7 : Tape & Reel AP7335A - XX X - X Output 50 : 5.0V Package W : SOT25 Packing 7 : Tape & Reel Device Package Code Packaging (Note 6) 7”/13” Tape and Reel Quantity Part Number Suffix AP7335A-XXW-7 AP7335A-XXSN-7 Note: W SN SOT25 DFN2020-6 3000/Tape & Reel 3000/Tape & Reel -7 -7 6. 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. AP7335A Document number: DS32259 Rev. 2 - 2 8 of 12 www.diodes.com July 2011 © Diodes Incorporated AP7335A 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Marking Information (1) SOT25 ( Top View ) 5 4 XX Y W X 1 2 3 7 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 : G = Green N EW PRODUCT Device Package Identification Code AP7335A-50 SOT25 TP (2) DFN2020-6 ( Top View ) XX Y WX 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 : G = Green Package DFN2020-6 Identification Code Device AP7335A-50 TP AP7335A Document number: DS35267 Rev. 2 - 2 9 of 12 www.diodes.com July 2011 © Diodes Incorporated AP7335A 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Package Outline Dimensions (cont.) (1) Package Type: SOT25 N EW PRODUCT (2) Package Type: DFN2020-6 0.57/0.63 Marking 0.15max. 0.05 C 0.08 C Seating plane C 0/0.05 0.15 C Top View 0.37 0.65 0.15 0.45 C L C L 2x B 1.95/2.075 1.45/1.65 C L A 0.30/0.40 1.95/2.075 0.76/0.96 C L 2x- 0.15 C 0.37 0.65nom. 0.2/0.3 1.67 0.05 M C A B Bottom View Land Pattern Recommendation (Unit:mm) AP7335A Document number: DS35267 Rev. 2 - 2 10 of 12 www.diodes.com 0.15 0.9 Pin#1 ID 1 R0. July 2011 © Diodes Incorporated AP7335A 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Taping Orientation (Note 7) For DFN2020-6 N EW PRODUCT Note: 7. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf. AP7335A Document number: DS35267 Rev. 2 - 2 11 of 12 www.diodes.com July 2011 © Diodes Incorporated AP7335A 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). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. 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