AP7361

AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Description The AP7361 is a 1A, adjustable and fixed output voltage, ultra-low dropout linear regulator with enable. The device includes pass element, error amplifier, band-gap reference, current limit and thermal shutdown circuitry. The device is turned on when EN pin is set to logic high level. The characteristics of the low dropout voltage and low quiescent current make it suitable for low to medium power applications, for example, laptop computers, audio and video applications, and battery powered devices. The typical quiescent current is approximately 70µA. Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions. The AP7361 is available in DFN3030E-8 package. Pin Assignments (Top View) OUT NC ADJ/NC GND 1 2 8 7 IN NC NC EN GND 3 4 6 5 N EW PRODUCT DFN3030E-8 Features • • • • • • • • • • • • • • • Wide input voltage range: 2.2V – 6V 150mV very low dropout at 300mA load 500mV very low dropout at 1A load Low quiescent current (IQ): 70µA typical Adjustable output voltage range: 1V to 5.0V Fixed output options: 1V to 3.3V Very fast transient response High PSRR Accurate voltage regulation Current limiting and short circuit protection Thermal shutdown protection Stable with ceramic output capacitor ≥ 2.2µF Ambient temperature range -40ºC to 85 ºC DFN3030E-8: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1) Applications • • • • Servers and laptops FPGA and DSP core or I/O power TV, and home electrical appliances Battery-powered devices 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 V IN IN OUT V OUT AP7361 1 uF Enable 4.7uF EN GND 1uF Enable EN AP7361 ADJ G ND R1 4.7uF R2 Fixed Output Adjustable Output AP7361 Document number: DS33626 Rev. 1 - 2 1 of 15 www.diodes.com December 2010 © Diodes Incorporated AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Pin Descriptions Pin Name IN OUT GND ADJ Pin Number DFN3030E-8 8 1 4 3 5 2, 6, 7 Description The input of the regulator. Bypass to ground through at least 1µF ceramic capacitor. The output of the regulator. Bypass to ground through at least 2.2µF ceramic capacitor. For improved ac load response a larger capacitor is recommended. Ground. Adjustable voltage version only – a resistor divider from this pin to the OUT pin and ground sets the output voltage. Enable input, active high. No connection. N EW PRODUCT EN NC Functional Block Diagram IN Current Limit and Thermal Shutdown OUT IN Current Limit and Thermal Shutdown OUT EN Gate Driver EN R Gate Driver ADJ 0.8V R 0.8V GND GND Fixed Version Adjustable Version Absolute Maximum Ratings Symbol ESD HBM ESD MM VIN TJ TST PD PD Note: Parameter Human Body Model ESD Protection Machine Model ESD Protection Input Voltage OUT, ADJ, EN Voltage Operating Junction Temperature Range Storage Temperature Range Power Dissipation (Note 2) Power Dissipation (Note 2) DFN3030E-8 Ratings >2 > 200 6.5 VIN + 0.3 -40 ~ 150 -65 ~150 Internally limited by maximum junction temperature of 150°C 1700 Unit KV V V V °C °C mW 2. Ratings apply to ambient temperature at 25°C AP7361 Document number: DS33626 Rev. 1 - 2 2 of 15 www.diodes.com December 2010 © Diodes Incorporated AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Recommended Operating Conditions Symbol VIN IOUT TA Note: Parameter Input voltage Output Current (Note 3) Operating Ambient Temperature Min 2.2 0 -40 Max 6.0 1.0 85 Unit V A °C 3. The device maintains a stable, regulated output voltage without a load current. When the output current is large, attention should be given to the limitation of the package power dissipation. N EW PRODUCT Electrical Characteristics (TA = 25oC, VIN = VOUT +1V, CIN = 1μF, COUT = 4.7μF, VEN = VIN, unless otherwise stated) Symbol Parameter Test Conditions VREF IADJ IQ ISHDN VOUT ΔVOUT ΔVIN × VOUT Min Typ. 0.8 0.1 70 0.05 Max 0.5 90 1 1 2 3 0.1 0.2 1.0 1.0 200 350 700 0.3 VIN 0.1 Unit V µA µA µA % %/V % % mV V V µA A mA dB µs ppm/°C °C °C o FB reference voltage ADJ pin leakage Input Quiescent Current Input Shutdown Current Output Voltage Accuracy Line Regulation IOUT = 10mA, TA = 25°C Enabled, IOUT = 0A VEN = 0V, IOUT = 0A IOUT = 100mA, TA = 25°C IOUT = 100mA, -40°C ≤ TA ≤ 85°C Over VIN, IOUT, and TA VIN = VOUT +1V to TA = 25°C 6V, IOUT = 100mA -40°C ≤TA ≤ 85°C IOUT from 1mA to 300mA IOUT from 1mA to 1A IOUT = 300mA IOUT = 500mA IOUT = 1A -1 -1 -2 -3 ±0.5 0.01 0.5 0.5 150 250 500 ΔVOUT / VOUT Load Regulation VDropout VIL VIH IEN ILIMIT ISHORT PSRR Dropout Voltage (Note 4) EN Input Logic Low Voltage EN Input Logic High Voltage EN Input leakage Current limit Short-circuit Current Power Supply Rejection Ratio (Note 5) Start-up Time -1.0 -1.0 tST ΔVOUT Output voltage temperature ΔTA × VOUT coefficient TSHDN THYS θJA Notes: VIN = 6V, VEN = 0V or 6V VIN = VOUT +1V VIN = VOUT +1V, Output Voltage < 25% Vout f = 1KHz, IOUT = 100mA f = 10KHz, IOUT = 100mA VOUT = 3V, COUT = 1µF, RL = 30Ω IOUT = 100mA, -40°C ≤ TA ≤ 85°C 0 1.0 -0.1 1.1 0.01 1.5 200 60 65 45 200 ±130 150 20 Thermal shutdown threshold Thermal shutdown hysteresis Thermal Resistance Junction-toAmbient DFN3030E-8 (Note 6) 70 C/W 4. 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 1.5V since minimum VIN = 2.2V. 5. For VIN ≥ 2.5V and VIN = VOUT + 1V. For VIN < 2.5V, the PSRR performance may be reduced. 6. Test condition for DFN3030E-8: Device mounted on 2"x2", FR-4 substrate PCB, with minimum recommended pad on top layer and thermal vias to bottom layer ground plane. AP7361 Document number: DS33626 Rev. 1 - 2 3 of 15 www.diodes.com December 2010 © Diodes Incorporated AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Typical Performance Characteristics Start-up Time Start-up Time VEN=0 to 2V (1V/div) VIN=4.0V CIN=COUT=1μF VEN=0 to 2V (1V/div) VIN=4.0V CIN=COUT=1μF N EW PRODUCT VOUT=3.0V (1V/div) with 100mA load VOUT=3.0V (1V/div) with 500mA load Time (100μs/div) Line Transient Response Time (100μs/div) Line Transient Response VIN=4.3V to 5.3V (1V/div) Tr=Tf=5μs IOUT=100mA COUT=4.7μF VIN=5.5V to 6V (1V/div) Tr=Tf=5μs IOUT=100mA COUT=4.7μF VOUT=3.3V (20mV/div) VOUT=5.0V (20mV/div) Time (40μs/div) Time (40μs/div) AP7361 Document number: DS33626 Rev. 1 - 2 4 of 15 www.diodes.com December 2010 © Diodes Incorporated AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Typical Performance Characteristics (Continued) Load Transient Response VIN=VEN=2.2V CIN=1μF,COUT=4.7μF Load Transient Response VIN=VEN=2.2V CIN=1μF,COUT=4.7μF VOUT=1.2V (20mV/div) VOUT=1.2V (20mV/div) N EW PRODUCT IOUT=50mA to 100mA (50mA/div) IOUT=100mA to 500mA (200mA/div) Time (200μs/div) Load Transient Response VIN=VEN=4.3V CIN=1μF,COUT=4.7μF Time (200μs/div) Load Transient Response VIN=VEN=4.3V CIN=1μF,COUT=4.7μF VOUT=3.3V (20mV/div) VOUT=3.3V (20mV/div) IOUT=50mA to 100mA (50mA/div) IOUT=100mA to 500mA (200mA/div) Time (200μs/div) Time (200μs/div) AP7361 Document number: DS33626 Rev. 1 - 2 5 of 15 www.diodes.com December 2010 © Diodes Incorporated AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Typical Performance Characteristics (Continued) Load Transient Response VIN=VEN=6.0V CIN=1μF,COUT=4.7μF Load Transient Response VIN=VEN=6.0V CIN=1μF,COUT=4.7μF VOUT=5.0V (20mV/div) VOUT=5.0V (20mV/div) N EW PRODUCT IOUT=50mA to 100mA (50mA/div) IOUT=100mA to 500mA (200mA/div) Time (200μs/div) PSRR vs Frequency 100 90 80 70 PSRR(dB) 60 50 40 30 20 10 0 Time (200μs/div) PSRR vs Frequency 100 90 80 70 PSRR(dB) 60 50 40 30 20 10 IOUT=30mA IOUT=30mA IOUT=100mA IOUT=100mA VIN=2.8V+0.5VppAC VOUT=1.8V COUT=4.7μF TA=25°C 10 0.01 100 0.1 1k 1 10k 10 100k 100 1M 1000 VIN=2.5V+0.5VppAC VOUT=1.2V COUT=4.7μF TA=25°C 0 10 0.01 100 0.1 1k 10k 1 10 Frequency(Hz) 100k 100 1M 1000 Frequency(Hz) AP7361 Document number: DS33626 Rev. 1 - 2 6 of 15 www.diodes.com December 2010 © Diodes Incorporated AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Typical Performance Characteristics (Continued) P SRR vs Frequency 100 90 80 70 PSRR(dB) PSRR(dB) 100 PSRR vs Frequency 90 80 70 60 50 40 30 20 10 0 IOUT=30mA IOUT=30mA 60 50 40 30 20 10 0 10 0.01 100 0.1 1k 10k 1 10 Frequency(Hz) 100k 100 1M 1000 N EW PRODUCT IOUT=100mA VIN=3.5V+0.5VppAC VOUT=2.5V COUT=4.7μF TA=25°C IOUT=100mA VIN=4.3V+0.5VppAC VOUT=3.3V COUT=4.7μF TA=25°C 10 0.01 100 0.1 1k 10k 1 10 Frequency(Hz) 100k 100 1M 1000 FB Reference Voltage vs Temperature 0.82 FB Reference Voltage(V) 600 Dropout Voltage vs Output Current VIN=4.3V IOUT=100mA 0.81 Dropout Voltage(mV) VOUT=3.3V 500 25°C 400 85°C 300 200 100 0.80 -40°C 0.79 0.78 -50 -25 0 25 50 75 Temperature(℃ ) 100 125 0 0 200 400 600 800 1000 Output Current(mA) AP7361 Document number: DS33626 Rev. 1 - 2 7 of 15 www.diodes.com December 2010 © Diodes Incorporated AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Typical Performance Characteristics (Continued) Current limit vs Input Voltage 2.5 Current limit vs Temperature 2.5 2.0 Current limit(A) 2.0 Current limit(A) 1.5 1.5 1.0 N EW PRODUCT 1.0 VOUT=1.2V 0.5 VIN=2.2V VOUT=1.2V 0.5 0.0 2 3 4 Input Voltage(V) 5 6 0.0 -50 -25 0 25 50 75 100 125 Temperature(℃ ) Current limit vs Temperature 2.5 2.0 Current limit(A) 1.5 1.0 0.5 0.0 -50 -25 0 25 50 75 100 125 Temperature(℃ ) Short-circuit current (mA) 300 250 200 150 100 Short-circuit current vs Temperature VIN=4.3V VOUT=3.3V VIN=4.3V 50 0 -50 -25 0 25 50 75 100 125 Temperature(℃ ) AP7361 Document number: DS33626 Rev. 1 - 2 8 of 15 www.diodes.com December 2010 © Diodes Incorporated AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Typical Performance Characteristics (Continued) Load Regulation 0.9 0.6 Output Variation(%) 0.3 0.0 -0.3 -0.6 -0.9 0 200 400 600 800 1000 Output Current(mA) -0.2 4 4.5 5 Input Voltage(V) 5.5 6 0.2 Line Regulation VIN=VEN=4.3V VOUT=3.3V Output Variation(%/V) VOUT=3.3V IOUT=100mA 85°C 25°C 0.1 85°C 0.0 N EW PRODUCT -40°C -0.1 25°C -40°C I nput Quiescent Current vs Temperature 80 Input Quiescent Current(μ A) Input Quiescent Current vs Input Voltage 80 Input Quiescent Current(μ A) 60 60 40 40 20 VIN=VEN=4.3V IOUT=0mA 20 TA=25°C IOUT=0mA 0 -50 -25 0 25 50 75 Temperature(℃ ) 100 125 0 4 4.5 5 5.5 Input Voltage(V) 6 AP7361 Document number: DS33626 Rev. 1 - 2 9 of 15 www.diodes.com December 2010 © Diodes Incorporated AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Application Information 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. Adjustable Operation The AP7361 provides output voltage from 0.8V to 5.0V through external resistor divider as shown below. V IN IN O UT V OU T AP7361 1 uF Enable EN G ND ADJ R1 4.7uF N EW PRODUCT Output Capacitor The output capacitor is required to stabilize and improve the transient response of the LDO. The AP7361 is stable with very small ceramic output capacitors. Using a ceramic capacitor value that is at least 2.2μF with 10mΩ ≦ ESR ≦ 300mΩ 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. Adjustable Output R2 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 ⎠ ⎝ 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 The AP7361 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. AP7361 Document number: DS33626 Rev. 1 - 2 10 of 15 www.diodes.com December 2010 © Diodes Incorporated AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Application Information (Continued) 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 prevent over-current and to protect the regulator from damage due to overheating. Ultra Fast Start-up After enabled, the AP7361 is able to provide full power in as little as tens of microseconds, typically 200µs, 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. Short Circuit Protection When OUT pin is short-circuit to GND, short circuit protection will be triggered and clamp the output current to approximately 200mA. Full current is restored when the output voltage exceeds 25% of Vout. This feature protects the regulator from over-current and damage due to overheating. Low Quiescent Current The AP7361, consuming only around 70µA for all input range, provides great power saving in portable and low power applications. N EW PRODUCT Power Dissipation Thermal Shutdown Protection Thermal protection disables the output when the junction temperature rises to approximately +150°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. 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 ) = ( +150°C - TA ) R θJA AP7361 Document number: DS33626 Rev. 1 - 2 11 of 15 www.diodes.com December 2010 © Diodes Incorporated AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Ordering Information AP7361 - XX XXX - X Output Blank : ADJ 10 : 1.0V 12 : 1.2V 15 : 1.5V 18 : 1.8V 25 : 2.5V 28 : 2.8V 33 : 3.3V Package FGE : DFN3030E-8 Packing 7 : Tape & Reel N EW PRODUCT Device Package Code Packaging (Note 7) AP7361-XXFGE-7 Note: FGE DFN3030E-8 7”/13” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 7. 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. AP7361 Document number: DS33626 Rev. 1 - 2 12 of 15 www.diodes.com December 2010 © Diodes Incorporated AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Marking Information (1) DFN3030E-8 ( Top View ) XX YW X N EW PRODUCT 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 : Internal code Package Identification Code Device AP7361ADJ AP7361-10 AP7361-12 AP7361-15 AP7361-18 AP7361-25 AP7361-28 AP7361-33 DFN3030E-8 DFN3030E-8 DFN3030E-8 DFN3030E-8 DFN3030E-8 DFN3030E-8 DFN3030E-8 DFN3030E-8 PA PB PC PD PE PF PG PH Package Outline Dimensions (1) Package Type: DFN3030E-8 TOP MARK 0.10 C 8X0.08 C 0.57/0.63 0/0.05 0.25 A 0.15Typ. Seating Plane Side View 8x-0.30 C L 0.65 C 2X- 2.95/3.05 (Pin #1 ID) B A C L 1.60 2.35 2.75 C L 8x-0.65 C L Pin #1 2.95/3.05 1.40/1.60 R0 .20 Land Pattern Recommendation (Unit: mm) 2X0.25 B 0.30/0.60 8X0.65Typ. 0.20/0.30 0.10 CAB Top View Bottom View AP7361 Document number: DS33626 Rev. 1 - 2 13 of 15 www.diodes.com December 2010 © Diodes Incorporated AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE Taping Orientation (Note 9) For DFN3030E-8 N EW PRODUCT Note: 9. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf . AP7361 Document number: DS33626 Rev. 1 - 2 14 of 15 www.diodes.com December 2010 © Diodes Incorporated AP7361 1A LOW DROPOUT ADJUSTABLE AND FIXED-MODE REGULATOR WITH ENABLE 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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