AP7335-30

AP7335 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Description 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. 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. 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, 2.8V, 3.0V, 3.3V and 3.9V outputs. Please contact your local sales office for any other voltage options. The AP7335 is available in SOT25 and DFN2020-6 packages. Pin Assignments (Top View) IN 1 GND 2 EN 3 4 NC 5 OUT N EW PRODUCT SOT25 (Fixed Output) (Top View) IN 1 GND 2 EN 3 4 ADJ 5 OUT Features SOT25 (Adj Output) • • • • • • • • • • • • • • • 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) (Top View) EN 1 GND 2 IN 3 6 NC 5 NC 4 OUT DFN2020-6 (Fixed Output) (Top View) EN 1 GND 2 6 ADJ 5 NC 4 OUT Applications IN 3 • • • • Smart Phones MP3/MP4 Battery-powered devices Bluetooth headset DFN2020-6 (Adj Output) 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. 1 of 17 www.diodes.com AP7335 Document number: DS32259 Rev. 2 - 2 September 2010 © Diodes Incorporated AP7335 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Application Circuit V IN IN OUT V OUT V IN IN OUT V OUT AP7335 1 uF Enable EN G ND ADJ R1 1uF AP7335 1uF Enable EN GND 1uF R2 N EW PRODUCT Adjustable O utput Fixed Output ⎛ R⎞ VOUT = VREF ⎜1 + 1 ⎟ where R 2 ≤ 80KΩ ⎜ R2 ⎟ ⎠ ⎝ Pin Descriptions Pin Number Pin Name SOT25 (fixed) SOT25 (adj) DFN2020-6 (fixed) DFN2020-6 (adj) Description IN GND EN ADJ NC OUT 1 2 3 4 5 1 2 3 4 5 3 2 1 5, 6 4 3 2 1 6 5 4 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 AP7335 Document number: DS32259 Rev. 2 - 2 2 of 17 www.diodes.com September 2010 © Diodes Incorporated AP7335 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Functional Block Diagram IN Current Limit and Thermal Shutdown OUT IN Current Limit and Thermal Shutdown OUT EN Gate Driver EN R Gate Driver N EW PRODUCT ADJ 0.8V R 0.8V GND GND Fixed Version Adjustable Version Absolute Maximum Ratings Symbol Parameter Ratings Unit ESD HBM ESD MM VIN Human Body Model ESD Protection Machine Model ESD Protection Input Voltage OUT, EN Voltage Continuous Load Current per Channel 2000 200 6.5 VIN + 0.3 Internal Limited -65 to 150 150 V V V V °C °C TST TJ Storage Temperature Range Maximum Junction Temperature Recommended Operating Conditions Symbol Parameter Min Max Unit VIN IOUT TA Notes: Input voltage Output Current (Note 2) Operating Ambient Temperature 2 0 -40 6 300 85 V mA °C 2 The device maintains a stable, regulated output voltage without a load current. AP7335 Document number: DS32259 Rev. 2 - 2 3 of 17 www.diodes.com September 2010 © 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) Symbol Parameter Test Conditions VREF IADJ VOUT ΔVOUT /ΔVIN/V ΔVOUT /VOUT Min Typ. Max Unit ADJ Reference Voltage (Adjustable version) ADJ Leakage (Adjustable version) Output Voltage Accuracy Line Regulation Load Regulation Dropout Voltage (Note 3) Input Quiescent Current Input Shutdown Current Input Leakage Current Start-up Time PSRR (Note 4) Short-circuit Current 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 IOUT= 0mA TA = -40oC to 85oC, IOUT = 10% of IOUT-Max VIN = (VOUT +1V) to VIN-Max, VEN = VIN, IOUT = 1mA VIN = (VOUT +1V) to VIN-Max, IOUT = 1mA to 300mA VOUT < 2.5V, IOUT = 300mA VOUT ≥ 2.5V, IOUT = 300mA VEN = VIN, IOUT = 0mA VEN = 0V, IOUT = 0mA VEN = 0V, OUT grounded VEN = 0V to 2.0V in 1μs, IOUT = 300mA VIN = [VOUT +1V]VDC + 0.5VppAC, f = 1kHz, IOUT = 50mA VIN = VIN-Min to VIN-Max, VOUT < 0.2V (fixed) or 25% of VOUT (ADJ version) 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 -2 0.8 0.1 1 2 V μA % %/V % mV μA μA μA μs dB mA mA 0.02 -0.6 170 150 35 0.1 0.1 220 65 140 400 1.4 -1 145 15 187 251 600 0.20 0.6 300 200 80 1 1 N EW PRODUCT VDropout IQ ISHDN ILEAK tST PSRR ISHORT ILIMIT VIL VIH IEN TSHDN THYS θJA Notes: 0.4 1 V V μA °C °C o SOT25 (Note 5) DFN2020-6 (Note 5) 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. 2 - 2 4 of 17 www.diodes.com September 2010 © Diodes Incorporated AP7335 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=5V CIN=COUT=1μF VEN=0 to 2V (1V/div) VIN=5V CIN=COUT=1μF N EW PRODUCT VOUT=3.3V (1V/div) with no load Time (40μs/div) Line Transient Response VOUT=3.3V (1V/div) with 300mA load Time (40μs/div) Line Transient Response VIN=4.3V to 5.3V (1V/div) Tr=Tf=2μs CIN=none, COUT=1μF VOUT=3.3V (20mV/div) VIN=4.3V to 5.3V (1V/div) Tr=Tf=2μs CIN=none, COUT=1μF VOUT=3.3V (20mV/div) IOUT=30mA (50mA/div) IOUT=300mA(200mA/div) Time (40μs/div) Time (40μs/div) AP7335 Document number: DS32259 Rev. 2 - 2 5 of 17 www.diodes.com September 2010 © Diodes Incorporated AP7335 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued) Load Transient Response Load Transient Response VOUT=1.8V (100mV/div) VIN=VEN=2.8V CIN=COUT=1μF Tr=Tf=1μs VOUT=1.8V (100mV/div) VIN=VEN=2.8V CIN=COUT=1μF Tr=Tf=1μs N EW PRODUCT IOUT=10mA to 150mA (200mA/div) IOUT=10mA to 300mA (200mA/div) Time (100μs/div) Load Transient Response Time (100μs/div) Load Transient Response VOUT=3.3V (100mV/div) VIN=VEN=4.3V CIN=COUT=1μF Tr=Tf=1μs VOUT=3.3V (100mV/div) 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) Time (100μs/div) AP7335 Document number: DS32259 Rev. 2 - 2 6 of 17 www.diodes.com September 2010 © Diodes Incorporated AP7335 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued) PSRR PSRR 80 70 60 PSRR(dB) PSRR(dB) 80 IOUT=50mA 70 60 IOUT=50mA 50 40 30 20 10 0 0.1 IOUT=300mA VIN=2.25V+0.5VppAC VOUT=0.8V CIN=none, COUT=1μF TA=25°C 50 40 30 20 10 0 0.1 IOUT=300mA VIN=2.25V+0.5VppAC VOUT=1.2V CIN=none, COUT=1μF TA=25°C N EW PRODUCT 1 10 Frequency(kHz) 100 1 10 Frequency(kHz) 100 PSRR PSRR 80 70 60 PSRR(dB) 80 IOUT=50mA 70 60 IOUT=50mA IOUT=300mA VIN=2.8V+0.5VppAC VOUT=1.8V CIN=none, COUT=1μF TA=25°C PSRR(dB) 50 40 30 20 10 0 0.1 50 40 30 20 10 0 IOUT=300mA VIN=4.3V+0.5VppAC VOUT=3.3V CIN=none, COUT=1μF TA=25°C 1 10 Frequency(kHz) 100 0.1 1 10 Frequency(kHz) 100 AP7335 Document number: DS32259 Rev. 2 - 2 7 of 17 www.diodes.com September 2010 © Diodes Incorporated AP7335 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued) I nput Quiescent current vs Input Voltage Input Quiescent Current vs Temperature 60 Input Quiescent Current(μ A) 60 Input Quiescent current(μ A) 50 40 30 20 10 0 4 TA=25°C VOUT=3.3V IOUT=0mA 50 40 30 20 10 0 VIN=VEN=4.3V VOUT=3.3V IOUT=0mA N EW PRODUCT 4.5 5 5.5 Input Voltage(V) 6 -50 -25 0 25 50 75 Temperature(℃ ) 100 125 Load Regulation 0.2 0.08 Line Regulation Output Variation(%/V) VIN=VEN=4.3V VOUT=3.3V Output Variation(%) 0.1 0.04 90°C -45°C -45°C 0.0 25°C 0.00 -0.1 -0.04 25°C VOUT=3.3V IOUT=1mA 90°C -0.2 0 50 100 150 200 Output Current(mA) 250 300 -0.08 4 4.5 5 5.5 Input Voltage(V) 6 AP7335 Document number: DS32259 Rev. 2 - 2 8 of 17 www.diodes.com September 2010 © Diodes Incorporated AP7335 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued) Dropout Voltage vs Output Current 250 250 Dropout Voltage vs Output Current VOUT=1.8V Dropout Voltage(mV) VOUT=3.3V 90°C 25°C Dropout Voltage(mV) 200 200 150 100 90°C 150 N EW PRODUCT 25°C 100 50 -45°C 50 0 0 50 100 150 200 Output Current(mA) 250 300 -45°C 0 0 50 100 150 200 250 300 Output Current(mA) ADJ Reference Voltage vs Temperature 0.82 ADJ Reference Voltage(V) Short-circuit Current vs Temperature 160 Short-circuit Current(mA) 0.81 VIN=4.3V IOUT=0mA VIN=4.3V 150 0.80 140 0.79 130 0.78 -50 -25 0 25 50 75 Temperature(℃ ) 100 125 120 -50 -25 0 25 50 75 Temperature(℃ ) 100 125 AP7335 Document number: DS32259 Rev. 2 - 2 9 of 17 www.diodes.com September 2010 © Diodes Incorporated AP7335 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued) Current limit vs Temperature 700 675 Current limit(mA) 650 625 600 575 550 -50 -25 0 25 50 75 Temperature(℃ ) 100 125 N EW PRODUCT VIN=4.3V VOUT=3.3V AP7335 Document number: DS32259 Rev. 2 - 2 10 of 17 www.diodes.com September 2010 © Diodes Incorporated AP7335 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. 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⎟ ⎜V ⎟ ⎝ REF ⎠ N EW PRODUCT 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. Region of Stable COUT ESR vs. Load Current 100 Unstable Range ON/OFF Input Operation 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. 10 COUT ESR (Ω) 1 Stable R VIN=4.3V CIN=COUT=1μF 0.1 0.01 Unstable Range 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. 0.001 0 50 100 150 200 250 300 Load Current (mA) Short Circuit Protection Adjustable Operation The AP7335 provides output voltage from 0.8V to 5.0V through external resistor divider as shown below. V IN IN OUT 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. V OUT Thermal Shutdown Protection R1 1u F A P 7335 1uF E n a b le EN GND ADJ R2 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. September 2010 © Diodes Incorporated AP7335 Document number: DS32259 Rev. 2 - 2 11 of 17 www.diodes.com AP7335 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Application Note (Continued) Ultra Fast Start-up 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. Low Quiescent Current The AP7335, consuming only around 35µA for all input range, provides great power saving in portable and low power applications. 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. Fast Transient Response N EW PRODUCT 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. 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) = ( +145°C - TA ) R θJA AP7335 Document number: DS32259 Rev. 2 - 2 12 of 17 www.diodes.com September 2010 © Diodes Incorporated AP7335 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Ordering Information AP7335 - XX XX G - X Output Blank : ADJ 08 : 0.8V 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 39 : 3.9V Device AP7335-XXWG-7 AP7335-XXSNG-7 Notes: Package W : SOT25 SN : DFN2020-6 Green Packing 7 : Tape & Reel G : Green N EW PRODUCT Package Code W SN Packaging (Note 6) SOT25 DFN2020-6 7”/13” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 3000/Tape & Reel -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. 2 - 2 13 of 17 www.diodes.com September 2010 © Diodes Incorporated AP7335 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Marking Information (1) SOT25 ( Top View ) 5 4 XX Y W X 1 Device AP7335-ADJ AP7335-08 AP7335-10 AP7335-12 AP7335-15 AP7335-18 AP7335-20 AP7335-25 AP7335-28 AP7335-30 AP7335-33 AP7335-39 7 N EW PRODUCT 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 Package SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 SOT25 Identification Code ZA ZB ZC ZD ZE ZF ZG ZH ZJ ZK ZM ZN (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 : Green Package DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 DFN2020-6 14 of 17 www.diodes.com Device AP7335-ADJ AP7335-08 AP7335-10 AP7335-12 AP7335-15 AP7335-18 AP7335-20 AP7335-25 AP7335-28 AP7335-30 AP7335-33 AP7335-39 AP7335 Document number: DS32259 Rev. 2 - 2 Identification Code ZA ZB ZC ZD ZE ZF ZG ZH ZJ ZK ZM ZN September 2010 © Diodes Incorporated AP7335 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Package Outline Dimensions (Continued) (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) AP7335 Document number: DS32259 Rev. 2 - 2 15 of 17 www.diodes.com 0.15 0.9 Pin#1 ID 1 R0. September 2010 © Diodes Incorporated AP7335 300mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Taping Orientation (Note 7) For DFN2020-6 N EW PRODUCT Notes: 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. 2 - 2 16 of 17 www.diodes.com September 2010 © 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). 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. 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