AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Description Pin Assignments NEW PRODUCT The AP7335 is a 300mA, adjustable and fixed output voltage, low dropout linear regulator. 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. (Top View) IN 1 (Top View) EN 3 4 ADJ SOT25 (ADJ Output) (Top View) EN 1 6 NC EN 1 GND 2 5 NC GND 2 IN 3 4 OUT DFN2020-6 (Fixed Output) IN 3 6 ADJ 5 NC 4 OUT DFN2020-6 (ADJ Output) Applications Features 300mA Low Dropout Regulator with EN Very low IQ: 35µA Wide input voltage range: 2V to 6V Wide adjustable output: 0.8V to 5.0V Fixed output options: 0.8V to 3.9V (0.1V step size possible) 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) Note: 4 NC SOT25 (Fixed Output) The AP7335 is available in SOT25 and DFN2020-6 packages. • 5 OUT IN 1 GND 2 EN 3 This device is available with adjustable output from 0.8V to 5.0V, and fixed version with 0.8V, 1.0V, 1.2V, 1.5V, 1.8V, 2.0V, 2.5V, 2.7V, 2.8V, 3.0V, 3.3V and 3.9V outputs. Please contact your local sales office for any other voltage options. • • • • • • • • • 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 approximately 35μA. Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions. • • • • • (Top View) • • • • Smart Phones MP3/MP4 Battery-powered devices Bluetooth headset 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. AP7335 Document number: DS32259 Rev. 3 - 2 1 of 16 www.diodes.com December 2011 © Diodes Incorporated AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Typical Application Circuit V IN AP7335 1uF Enable ADJ EN G ND OUT AP7335 R1 1uF Enable V OUT IN O UT 1uF NEW PRODUCT V IN V OUT IN 1uF EN GND R2 Fixed Output Adjustable O utput ⎛ R ⎞ VOUT = VREF ⎜⎜1 + 1 ⎟⎟ where R2 ≤ 80KΩ R 2⎠ ⎝ Pin Descriptions Pin Name Pin Number SOT25 (fixed) SOT25 (adj) DFN2020-6 (fixed) DFN2020-6 (adj) IN 1 1 3 3 GND EN ADJ NC 2 3 4 2 3 4 - 2 1 5, 6 2 1 6 5 OUT 5 5 4 4 AP7335 Document number: DS32259 Rev. 3 - 2 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 2 of 16 www.diodes.com December 2011 © Diodes Incorporated AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Functional Block Diagram IN OUT Gate Driver EN Current Limit and Thermal Shutdown IN OUT Gate Driver EN R Current Limit and Thermal Shutdown NEW PRODUCT ADJ 0.8V 0.8V R GND GND Adjustable Version Fixed Version Absolute Maximum Ratings Ratings Unit ESD HBM Symbol Human Body Model ESD Protection 2000 V ESD MM Machine Model ESD Protection 200 V 6.5 V VIN + 0.3 V VIN Parameter Input Voltage OUT, EN Voltage Continuous Load Current per Channel TST Storage Temperature Range TJ Maximum Junction Temperature Internal Limited -65 to 150 °C 150 °C Recommended Operating Conditions Symbol VIN Input voltage IOUT Output Current (Note 2) TA Note: Parameter Operating Ambient Temperature Min Max Unit 2 6 V 0 300 mA -40 85 °C 2. The device maintains a stable, regulated output voltage without a load current. AP7335 Document number: DS32259 Rev. 3 - 2 3 of 16 www.diodes.com December 2011 © Diodes Incorporated AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Electrical Characteristics (TA = 25oC, VIN = VOUT +1V, CIN = 1μF, COUT = 1μF, VEN = 2V, unless otherwise stated) NEW PRODUCT Symbol Parameter Test Conditions VREF ADJ Reference Voltage (Adjustable version) IADJ ADJ Leakage (Adjustable version) VOUT Output Voltage Accuracy ΔVOUT/ ΔVIN/V Line Regulation ΔVOUT/ VOUT Load Regulation VDropout Dropout Voltage (Note 3) Min IOUT= 0mA Typ. IOUT = 10% of IOUT-Max 0.02 VEN = VIN, IOUT = 1mA IOUT = 1mA to 300mA 1 μA 2 % 0.20 %/V 0.6 % V -2 VIN = (VOUT +1V) to VIN-Max, VIN = (VOUT +1V) to VIN-Max, Unit 0.8 0.1 TA = -40oC to 85oC, Max -0.6 VOUT < 2.5V, IOUT = 300mA 170 300 VOUT ≥ 2.5V, IOUT = 300mA 150 200 35 80 mV μA IQ Input Quiescent Current VEN = VIN, IOUT = 0mA 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 PSRR PSRR (Note 4) ISHORT Short-circuit Current VEN = 0V to 2.0V in 1μs, IOUT = 300mA VIN = [VOUT +1V]VDC + 0.5VppAC, f = 1kHz, IOUT = 50mA 220 μs 65 dB 140 mA 600 mA VIN = VIN-Min to VIN-Max, VOUT < 0.2V (fixed) or 25% of VOUT (ADJ version) ILIMIT Current limit VIN = VIN-Min to VIN-Max, VOUT/ROUT = 1.2A 400 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 TSHDN Thermal shutdown threshold THYS Thermal shutdown hysteresis θJA Notes: Thermal Resistance Junction-to-Ambient 0.4 V V μA 1 145 °C 15 °C SOT25 (Note 5) 187 DFN2020-6 (Note 5) 251 o C/W 3. 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 input voltages above minimum VIN = 2.0V. 4. At VIN < 2.3V, the PSRR performance may be reduced. 5. Test condition for all packages: Device mounted on FR-4 substrate PC board, 1oz copper, with minimum recommended pad layout. AP7335 Document number: DS32259 Rev. 3 - 2 4 of 16 www.diodes.com December 2011 © Diodes Incorporated AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR NEW PRODUCT Typical Performance Characteristics Start-Up Time Start-Up Time VEN=0 to 2V (1V/div) VIN=5V CIN=COUT=1μF VEN=0 to 2V (1V/div) VIN=5V CIN=COUT=1μF VOUT=3.3V (1V/div) with no load VOUT=3.3V (1V/div) with 300mA load Time (40μs/div) Time (40μs/div) Line Transient Response Line Transient Response VIN=4.3V to 5.3V (1V/div) Tr=Tf=2μs CIN=none, COUT=1μF VIN=4.3V to 5.3V (1V/div) Tr=Tf=2μs CIN=none, COUT=1μF VOUT=3.3V (20mV/div) VOUT=3.3V (20mV/div) IOUT=30mA (50mA/div) IOUT=300mA(200mA/div) Time (40μs/div) AP7335 Document number: DS32259 Rev. 3 - 2 Time (40μs/div) 5 of 16 www.diodes.com December 2011 © Diodes Incorporated AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Typical Performance Characteristics (cont.) Load Transient Response Load Transient Response VOUT=1.8V (100mV/div) VOUT=1.8V (100mV/div) NEW PRODUCT VIN=VEN=2.8V CIN=COUT=1μF Tr=Tf=1μs VIN=VEN=2.8V CIN=COUT=1μF Tr=Tf=1μs IOUT=10mA to 300mA (200mA/div) IOUT=10mA to 150mA (200mA/div) Time (100μs/div) Time (100μs/div) Load Transient Response Load Transient Response VOUT=3.3V (100mV/div) VOUT=3.3V (100mV/div) VIN=VEN=4.3V CIN=COUT=1μF Tr=Tf=1μs VIN=VEN=4.3V CIN=COUT=1μF Tr=Tf=1μs IOUT=10mA to 150mA (200mA/div) IOUT=10mA to 300mA (200mA/div) Time (100μs/div) AP7335 Document number: DS32259 Rev. 3 - 2 Time (100μs/div) 6 of 16 www.diodes.com December 2011 © Diodes Incorporated AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Typical Performance Characteristics (cont.) 80 80 70 70 IOUT = 50mA IOUT = 50mA 60 60 PSRR (dB) PSRR (dB) IOUT = 300mA 50 40 VIN = 2.25V + 0.5VppAC VOUT = 0.8V CIN = none, COUT = 1µF TA = 25°C 30 20 50 40 30 20 10 1 10 FREQUENCY (kHz) PSRR 0 0.1 100 80 80 70 70 IOUT = 50mA PSRR (dB) IOUT = 300mA 40 30 20 VIN = 2.8V + 0.5VppAC VOUT = 1.8V CIN = none, COUT = 1µF TA = 25°C 100 IOUT = 50mA 50 40 10 1 10 FREQUENCY (kHz) PSRR AP7335 Document number: DS32259 Rev. 3 - 2 100 IOUT = 300mA 30 20 10 0 0.1 1 10 FREQUENCY (kHz) PSRR 60 60 50 VIN = 2.25V + 0.5VppAC VOUT = 1.2V CIN = none, COUT = 1µF TA = 25°C 10 0 0.1 PSRR (dB) NEW PRODUCT IOUT = 300mA 0 0.1 7 of 16 www.diodes.com VIN = 4.3V + 0.5VppAC VOUT = 3.3V CIN = none, COUT = 1µF 1 10 FREQUENCY (kHz) PSRR 100 December 2011 © Diodes Incorporated AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Typical Performance Characteristics (cont.) 60 TA = 25°C VOUT = 3.3V IOUT = 0mA INPUT QUIESCENT CURRENT (µA) INPUT QUIESCENT CURRENT (µA) 50 40 30 20 10 0 4 VIN = VEN = 4.3V VOUT = 3.3V IOUT = 0mA 50 40 30 20 10 0 -50 4.5 5 5.5 6 INPUT VOLTAGE (V) Input Quiescent Current vs. Input Voltage -25 0 25 50 75 100 125 TEMPERATURE (°C) Input Quiescent Current vs. Temperature 60 0.2 OUTPUT VARIATION (%/A) VIN = VEN = 4.3V VOUT = 3.3V OUTPUT VARIATION (%) NEW PRODUCT 60 0.1 -45°C 0.0 25°C -0.1 90°C 50 90°C -45°C 30 25°C 20 VOUT = 3.3V IOUT = 1mA -0.2 0 50 100 150 200 250 300 OUTPUT CURRENT (mA) Load Regulation AP7335 Document number: DS32259 Rev. 3 - 2 8 of 16 www.diodes.com 0 4 4.5 5 5.5 INPUT VOLTAGE (V) Line Regulation 6 December 2011 © Diodes Incorporated AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Typical Performance Characteristics (cont.) 250 250 DROPOUT VOLTAGE (mV) DROPOUT VOLTAGE (mV) VOUT = 3.3V 200 90°C 150 25°C 100 -45°C 50 200 90°C 150 25°C 100 50 -45°C 0 0 0 50 100 150 200 250 300 OUTPUT CURRENT (mA) Dropout Voltage vs. Output Current 0 VIN = 4.3V IOUT = 0mA SHORT - CIRCUIT CURRENT (mA) ADJ REFERENCE VOLTAGE (V) 50 100 150 200 250 300 OUTPUT CURRENT (mA) Dropout Voltage vs. Output Current 160 0.82 0.81 0.80 0.79 0.78 -50 -25 0 25 50 75 100 125 TEMPERATURE (°C) ADJ Reference Voltage vs. Temperature VIN = 4.3V 150 140 130 120 -50 -25 0 25 50 75 100 125 TEMPERATURE (°C) Short - Circuit Current vs. Temperature 700 675 CURRENT LIMIT (mA) NEW PRODUCT VOUT = 1.8V VIN = 4.3V VOUT = 3.3V 650 625 600 575 550 -50 -25 0 25 50 75 100 TEMPERATURE (°C) Current Limit vs. Temperature AP7335 Document number: DS32259 Rev. 3 - 2 125 9 of 16 www.diodes.com December 2011 © Diodes Incorporated AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Application Notes Input Capacitor The output voltage is calculated by: ⎛ R ⎞ VOUT = VREF ⎜⎜1 + 1 ⎟⎟ R 2⎠ ⎝ Where VREF=0.8V (the internal reference voltage) Rearranging the equation will give the following that is used for adjusting the output to a particular voltage: ⎛V ⎞ R1 = R2 ⎜⎜ OUT − 1⎟⎟ ⎝ VREF ⎠ Output Capacitor The output capacitor is required to stabilize and improve the transient response of the LDO. The AP7335 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. To maintain the stability of the internal reference voltage, R2 need to be kept smaller than 80kΩ. No Load Stability Other than external resistor divider, 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 100 The AP7335 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. Unstable Range 10 COUT ESR (Ω) NEW PRODUCT 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. 1 VIN = 4.3V C IN = C OUT = 1µF Stable 0.1 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. 0.01 Unstable Range 0.001 0 50 100 150 200 250 300 LOAD CURRENT (mA) Region of Stable COUT ESR vs. Load Current Adjustable Operation The AP7335 provides output voltage from 0.8V to 5.0V through external resistor divider as shown below. V IN OUT A P 7335 R1 1u F 1u F E n ab le ADJ EN GND AP7335 Document number: DS32259 Rev. 3 - 2 R2 When OUT pin is short-circuit to GND, short circuit protection will be triggered and clamp the output current to approximately 140mA. This feature protects the regulator from over-current and damage due to overheating. Thermal Shutdown Protection V OUT IN Short Circuit 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. 10 of 16 www.diodes.com December 2011 © Diodes Incorporated AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Application Notes Ultra Fast Start-up Low Quiescent Current After enabled, the AP7335 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. The AP7335, consuming only around 35µA for all input range, provides great power saving in portable and low power applications. NEW PRODUCT 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 AP7335’s fast transient response from 0 to 300mA provides stable voltage supply for fast DSP and GSM chipset with fast changing load. Wide Output Range The AP7335, with a wide output range of 0.8V to 5.0V, provides a versatile LDO solution for many portable 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 equation in the following: PD (max@TA) = AP7335 Document number: DS32259 Rev. 3 - 2 11 of 16 www.diodes.com ( +145°C - TA ) R θJA December 2011 © Diodes Incorporated AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Ordering Information NEW PRODUCT AP7335 - XX XX G - X Output Package Green Packing Blank : ADJ 08 : 0.8V 10 : 1.0V 12 : 1.2V 15 : 1.5V 18 : 1.8V 20 : 2.0V 25 : 2.5V 27 : 2.7V 28 : 2.8V 30 : 3.0V 33 : 3.3V 39 : 3.9V W : SOT25 SN : DFN2020-6 G : Green 7 : Tape & Reel Device Package Code Packaging (Note 6) AP7335-XXWG-7 AP7335-XXSNG-7 W SN SOT25 DFN2020-6 Note: 7”/13” Tape and Reel Quantity Part Number Suffix 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. AP7335 Document number: DS32259 Rev. 3 - 2 12 of 16 www.diodes.com December 2011 © Diodes Incorporated AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Marking Information (1) SOT25 7 ( Top View ) 5 4 XX Y W X NEW PRODUCT 1 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 : Green Device Package Identification Code AP7335-ADJ AP7335-08 AP7335-10 AP7335-12 AP7335-15 AP7335-18 AP7335-20 AP7335-25 AP7335-27 AP7335-28 AP7335-30 AP7335-33 AP7335-39 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 ZA ZB ZC ZD ZE ZF ZG ZH ZI ZJ ZK ZM ZN (2) DFN2020-6 ( Top View ) XX Y WX AP7335 Document number: DS32259 Rev. 3 - 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 AP7335-ADJ AP7335-08 AP7335-10 AP7335-12 AP7335-15 AP7335-18 AP7335-20 AP7335-25 AP7335-27 AP7335-28 AP7335-30 AP7335-33 AP7335-39 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 ZA ZB ZC ZD ZE ZF ZG ZH ZI ZJ ZK ZM ZN 13 of 16 www.diodes.com December 2011 © Diodes Incorporated AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Package Outline Dimensions NEW PRODUCT (1) Package Type: SOT25 0.57/0.63 (2) Package Type: DFN2020-6 Marking 0.15max. 0.05 C 0.15 C B Seating plane C Top View 0.65 0.37 1.95/2.075 1.45/1.65 0.15 2x 0/0.05 0.08 C A 0.15 C 0.65nom. CL 0.2/0.3 Bottom View AP7335 Document number: DS32259 Rev. 3 - 2 0.37 0.9 CL 0.15 0.30/0.40 CL 1 R0. 2x- 0.76/0.96 1.95/2.075 Pin#1 ID 0.45 CL 1.67 0.05 M C A B Land Pattern Recommendation (Unit:mm) 14 of 16 www.diodes.com December 2011 © Diodes Incorporated AP7335 300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR Taping Orientation (Note 7) NEW PRODUCT For DFN2020-6 Note: 7. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf. AP7335 Document number: DS32259 Rev. 3 - 2 15 of 16 www.diodes.com December 2011 © Diodes Incorporated AP7335 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). NEW PRODUCT 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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