AP7335A 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Description Pin Assignments The AP7335A is a 300mA, 3.3V and 5.0V fixed output voltage, lowdropout linear regulator with ±1% output voltage accuracy. The device includes 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. IN 1 5 OUT GND 2 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. EN 3 4 NC SOT25 (Fixed Output) EN 1 6 NC GND 2 5 NC IN 3 4 OUT U-DFN2020-6 (Fixed Output) This device is only available as a 5.0V fixed version. Please contact your local sales office for any other voltage options. The AP7335A is packaged in SOT25 and U-DFN2020-6. Features Applications 300mA Low Dropout Regulator with EN Smart Phones Very low IQ 35µA MP3/MP4s Fixed output at 3.3V and 5.0V Battery-Powered Devices - Bluetooth Headsets VIN MIN 5.5V High PSRR: 65dB at 1kHz Battery Chargers Fast start-up time 220µs LCD TVs Stable with low ESR, 1µF ceramic output capacitor Multifunction Monitors 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 U-DFN2020-6 Available in “Green” Molding Compound (No Br, Sb) Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. AP7335A Document number: DS35267 Rev. 4 - 2 1 of 13 www.diodes.com August 2015 © Diodes Incorporated AP7335A Typical Applications Circuit VIN VOUT IN OUT AP7335 1uF Enable 1uF EN GND Fixed Output Pin Descriptions Package Name Pin Number SOT25 Function (fixed) U-DFN2020-6 (fixed) IN 1 3 Voltage input pin. Bypass to ground through at least 1µF MLCC capacitor GND 2 2 Ground EN 3 1 Enable input, active high ADJ - - Output feedback pin NC 4 5, 6 OUT 5 4 No connection Voltage output pin. Bypass to ground through 1µF MLCC capacitor Functional Block Diagram IN EN OUT Gate Driver Current Limit and Thermal Shutdown R 0.8V R GND Fixed Version AP7335A Document number: DS35267 Rev. 4 - 2 2 of 13 www.diodes.com August 2015 © Diodes Incorporated AP7335A Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) Symbol VIN Vout,Enable ILimit TST Parameter Input Voltage Storage Temperature Range ESD HBM Human Body Model ESD Protection ESD MM Machine Model ESD Protection Unit 6.5 V VIN + 0.3 V Internal Limited mA -65 to +150 °C 2,000 V 200 V OUT, EN Voltage Continuous Load Current per Channel Ratings 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 (@TA = +25°C, unless otherwise specified.) Symbol Input voltage (Note 5) IOUT Output Current (Note 4) TA Notes: Parameter VIN Operating Ambient Temperature Min Max Unit 2 (Note 5) 6 V 0 300 mA -40 +85 °C 4. The device maintains a stable, regulated output voltage without a load current. 5. VIN(MIN) = 5.5V for 5.0V, VOUT at 300mA IOUT. AP7335A Document number: DS35267 Rev. 4 - 2 3 of 13 www.diodes.com August 2015 © Diodes Incorporated AP7335A Electrical Characteristics (@TA = +25°C, unless otherwise specified.) (TA = +25°C, VIN = 5.5 to 6V, CIN = 1μF, COUT = 1μF, VEN = 2V, unless otherwise stated) Symbol VOUT Parameter Output Voltage Accuracy VOUT /VIN/V Line Regulation VOUT /VOUT Load Regulation VDROPOUT Dropout Voltage (Note 6) Test Conditions Min Typ. Max Unit -1 - 1 % - 0.02 0.20 %/V -0.6 - 0.6 % IOUT = 300mA - 150 200 mV 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 IQ Input Quiescent Current VEN = VIN, IOUT = 0mA - 35 80 μA ISHDN Input Shutdown Current VEN = 0V, IOUT = 0mA - 0.1 1 μA ILEAK Input Leakage Current VEN = 0V, OUT grounded - 0.1 1 μA TST Start-Up Time - 220 - μs - 65 - dB - 160 - mA 400 650 - mA 0.4 V PSRR PSRR ISHORT Short-Circuit Current ILIMIT Current Limit VEN = 0V to 2.0V in 1μs, IOUT = 300mA VIN = 5.5VDC + 0.5VppAC, f = 1kHz, IOUT = 50mA VIN = VIN-Min to VIN-Max, VOUT < 0.2V (fixed) or VIN = VIN-Min to VIN-Max, VOUT/ROUT = 1.2A VIL EN Input Logic Low Voltage VIN = VIN-Min to VIN-Max - - VIH EN Input Logic High Voltage VIN = VIN-Min to VIN-Max 1.4 - IEN EN Input Current VIN = 0V or VIN-Max -1 - 1 μA TSHDN Thermal Shutdown threshold - - +145 - C THYS Thermal Shutdown hysteresis - - +15 - °C SOT25 (Note 7) - 187 - U-DFN2020-6 (Note 7) - 251 - θJA Notes: Thermal Resistance Junction-to-Ambient V °C/W 6. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value. 7. 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. 4 - 2 4 of 13 www.diodes.com August 2015 © Diodes Incorporated AP7335A Performance Characteristics Start-Up Time Start-Up Time VEN=0 to 2V (1V/div) VIN=5.5V CIN=COUT=1μF VOUT=5.0V (2V/div) with no load VEN=0 to 2V (1V/div) VIN=5.5V CIN=COUT=1μF VOUT=5.0V (2V/div) with 300mA load Time (40μs/div) Time (40μs/div) Line Transient Response 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=300mA (200mA/div) IOUT=30mA (50mA/div) Time (40μs/div) Time (40μs/div) Load Transient Response Load Transient Response VIN=VEN=5.5V CIN=COUT=1μF Tr=Tf=1μs VIN=VEN=5.5V CIN=COUT=1μF Tr=Tf=1μs VOUT=5.0V (100mV/div) VOUT=5.0V (100mV/div) IOUT=10mA to 300mA (200mA/div) IOUT=10mA to 150mA (200mA/div) Time (100μs/div) Time (100μs/div) AP7335A Document number: DS35267 Rev. 4 - 2 5 of 13 www.diodes.com August 2015 © Diodes Incorporated AP7335A Performance Characteristics (continued) PSRR Dropout Voltage vs Output Current 200 80 Dropout Voltage(mV) 70 PSRR(dB) 60 50 40 30 20 150 100 50 10 0 0 0.1 1 10 Frequency(kHz) 0 100 100 150 200 Output Current(mA) 250 300 Current limit vs Temperature 200 800 175 700 Current limit(mA) Short-circuit Current(mA) Short-circuit Current vs Temperature 50 150 125 100 600 500 400 -50 -25 0 25 50 75 Temperature(℃) AP7335A Document number: DS35267 Rev. 4 - 2 100 125 -50 -25 0 25 50 75 100 125 Temperature(℃) 6 of 13 www.diodes.com August 2015 © Diodes Incorporated AP7335A 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. 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. Region of Stable COUT ESR vs. Load Current 100 COUT ESR (Ω) 10 Stable Range 1 VIN=5.5V CIN=COUT=1μF 0.1 Unstable Range 0.01 0.001 0 50 100 150 200 250 300 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. 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 V IL and VIH. 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 overcurrent 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 overcurrent and damage due to overheating. 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. AP7335A Document number: DS35267 Rev. 4 - 2 7 of 13 www.diodes.com August 2015 © Diodes Incorporated AP7335A Application Note Ultra Fast Start-Up 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 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. Low Quiescent Current The AP7335A, consuming only around 35µA for all input range, provides great power saving in portable and low power applications. 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) = ( 145C - TA ) R JA Ordering Information Note: Device Package Code AP7335A-XXW5-7 AP7335A-XXSN-7 Packaging 7”/13” Tape and Reel (Note 8) Quantity Part Number Suffix W5 SOT25 3,000/Tape & Reel -7 SN U-DFN2020-6 3,000/Tape & Reel -7 8. 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: DS35267 Rev. 4 - 2 Device Package Identification Code AP7335A-33W5-7 SOT25 TN AP7335A-50W5-7 SOT25 TP AP7335A-33SN-7 U-DFN2020-6 TN AP7335A-50SN-7 U-DFN2020-6 TP 8 of 13 www.diodes.com August 2015 © Diodes Incorporated AP7335A Marking Information (1) SOT25 (Top View) 4 7 5 XX Y W X 1 (2) 2 3 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 U-DFN2020-6 (Top View) XX Y WX AP7335A Document number: DS35267 Rev. 4 - 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 : G = Green 9 of 13 www.diodes.com August 2015 © Diodes Incorporated AP7335A Package Outline Dimensions (All dimensions in mm.) Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version. (1) Package Type: SOT25 A SOT25 Dim Min Max Typ A 0.35 0.50 0.38 B 1.50 1.70 1.60 C 2.70 3.00 2.80 D 0.95 H 2.90 3.10 3.00 J 0.013 0.10 0.05 K 1.00 1.30 1.10 L 0.35 0.55 0.40 M 0.10 0.20 0.15 N 0.70 0.80 0.75 0° 8° All Dimensions in mm B C H K J (2) M N L D Package Type: U-DFN2020-6 A1 A3 A Seating Plane D D2 D2/2 R0 E E2 0 .10 E2/2 Pin #1 ID U-DFN2020-6 Dim Min Max Typ A 0.57 0.63 0.60 A1 0 0.05 0.03 A3 0.15 b 0.20 0.30 0.25 D 1.95 2.075 2.00 D2 1.45 1.65 1.55 e 0.65 E 1.95 2.075 2.00 E2 0.76 0.96 0.86 L 0.30 0.40 0.35 All Dimensions in mm L e AP7335A Document number: DS35267 Rev. 4 - 2 b 10 of 13 www.diodes.com August 2015 © Diodes Incorporated AP7335A Suggested Pad Layout Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version. Package Type: SOT25 C2 Z C2 C1 G Dimensions Value (in mm) Z 3.20 G 1.60 X 0.55 Y 0.80 C1 2.40 C2 0.95 Y X Package Type: U-DFN2020-6 X C G Y Dimensions Y1 C G X X1 Y Y1 G Value (in mm) 0.65 0.15 0.37 1.67 0.45 0.90 X X1 AP7335A Document number: DS35267 Rev. 4 - 2 11 of 13 www.diodes.com August 2015 © Diodes Incorporated AP7335A For U-DFN2020-6 Note: 9. 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. 4 - 2 12 of 13 www.diodes.com August 2015 © Diodes Incorporated AP7335A 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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