AP7167 1.2A LOW DROPOUT REGULATOR WITH POK Description Pin Assignments The AP7167 is a 1.2A, adjustable output voltage, ultra-low dropout linear regulator. 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. A Power-OK (POK) output is available for power sequence control. ( Top View ) 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 125µA. IN 1 10 OUT IN 2 9 OUT POK 3 8 FB NC 4 7 NC EN 5 6 GND DFN3030-10 Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions. ( Top View ) The AP7167 are available in DFN3030-10 and SOP-8L packages. IN 1 8 OUT IN 2 7 OUT POK 3 6 FB EN 4 5 GND Features • • • • • • • • • • • • • • • Wide input voltage range: 2.2V – 5.5V 230mV very low dropout at 500mA load 500mV very low dropout at 1A load 3% total accuracy over line, load and temperature Very low quiescent current (IQ): 125µA typical Adjustable output voltage range: 0.8V to 5.0V Very fast transient response High PSRR Accurate voltage regulation Current limiting and short circuit protection Thermal shutdown protection Stable with any type output capacitor ≥ 4.7µF Ambient temperature range -40ºC to 85 ºC DFN3030-10 and SOP-8L-EP: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1) Notes: SOP-8L-EP Applications • • • • • • Servers and laptops Smart phone and PDA MP3/MP4 Bluetooth headset Low and medium power applications FPGA and DSP core or I/O power 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. AP7167 Document number: DS31252 Rev. 7 - 2 1 of 14 www.diodes.com September 2010 © Diodes Incorporated AP7167 1.2A LOW DROPOUT REGULATOR WITH POK Typical Application Circuit VIN VOUT IN OUT 100kOhm R1 AP7167 1µF POK 10µF FB R2 Enable EN GND ⎛ R ⎞ VOUT = VREF ⎜⎜1 + 1 ⎟⎟ R2 ⎠ ⎝ Pin Descriptions Pin Name Pin # DFN3030-10 SOP-8L-EP IN 1, 2 1, 2 POK EN GND FB 3 5 6 8 3 4 5 6 OUT 9, 10 7, 8 NC 4, 7 NA AP7167 Document number: DS31252 Rev. 7 - 2 Description Voltage input pins, to be tied together externally. Bypass to ground through at least 1µF capacitor. Power-OK output, active-high open-drain. Enable input, active high. Ground. Output feedback. Voltage output pins, to be tied together externally. Bypass to ground through at least 4.7µF ceramic capacitor. No connection. 2 of 14 www.diodes.com September 2010 © Diodes Incorporated AP7167 1.2A LOW DROPOUT REGULATOR WITH POK Functional Block Diagram IN OUT Current Limit and Thermal Shutdown Gate Driver EN FB 0.8V POK 0.744V GND Absolute Maximum Ratings Symbol ESD HBM ESD MM VIN Notes: Parameter Human Body Model ESD Protection Machine Model ESD Protection Input Voltage OUT, FB, POK, EN Voltage Continuous Load Current Ratings 4 Unit KV 300 7 VIN + 0.3 Internal Limited V V V TJ Operating Junction Temperature Range -40 ~ 150 °C TST Storage Temperature Range PD Power Dissipation -65 ~150 3.1 4.0 °C W W DFN3030-10 (Note 2, 4) SOP-8L-EP (Note 2, 5) 2. Ratings apply to ambient temperature at 25°C Recommended Operating Conditions Symbol Parameter VIN Input voltage IOUT Output Current TA Operating Ambient Temperature AP7167 Document number: DS31252 Rev. 7 - 2 3 of 14 www.diodes.com Min Max Unit 2.2 5.5 V 0 1.2 A -40 85 °C September 2010 © Diodes Incorporated AP7167 1.2A LOW DROPOUT REGULATOR WITH POK Electrical Characteristics (TA = 25oC, VIN = VOUT +1V, CIN = 1µF, COUT = 10µF, VEN = VIN, unless otherwise stated) Symbol Parameter Test Conditions Min Typ. Max Unit IQ Input Quiescent Current IOUT= 0 ⎯ 125 180 µA ISHDN Input Shutdown Current VEN = 0V, IOUT = 0 (Note 3) -1 0.1 1 µA VDropout VREF IFB Dropout Voltage VOUT ≥ 1.5V, IOUT = 0.5A 230 VOUT ≥ 1.5V, IOUT = 1A 500 FB reference voltage ⎯ FB leakage Over line, load and temperature ΔVOUT / VOUT ΔVIN Line Regulation VIN = VOUT +1V to 5.5V, IOUT = 1mA ΔVOUT / VOUT Load Regulation IOUT from 1mA to 1A Start-up Time, from EN high to POK high VEN = 0V to 2.0V, IOUT = 100mA, VIN = 3.3V 1kHz, VIN = 3.3V, VOUT = 1.2V, IOUT = 100mA tST PSRR ILIMIT ISHORT Power Supply Rejection Ratio Current limit VOUT = 1.8V, ROUT = 0.5Ω Short-circuit Current VIN = 3.3V, VOUT < 0.2V VIL EN Input Logic Low Voltage VIH EN Input Logic High Voltage IEN EN Input leakage VEN = 0V or 5.5V VOL POK output low voltage Force 2mA Output voltage (rising) POK threshold FB (or OUT for fixed version) rising VPOK_TH_UP VPOK_Hys 0.01 -3 -1.5 1.2 3 % %/V % 190 µs 60 dB 1.6 A 750 mA 0.4 V ⎯ 87% VPOK = 5.5V ⎯ V 0.01 1 µA 100 200 mV 92% 97% Vref 4% Vref 160 µs POK leakage current TSHDN Thermal shutdown threshold 155 THYS Thermal shutdown hysteresis 25 Notes: µA 1.4 VIN = 3.3V, VOUT = 1.2V Thermal Resistance Junction-toAmbient 1 1.5 IPOK_LK θJA mV V 0.02 Output voltage POK hysteresis POK deglitch 800 0.8 Output Voltage Total Accuracy VOUT mV 0.01 1 µA °C °C DFN3030-10 (Note 4) 40 o SOP-8L-EP (Note 5) 27 o C/W C/W 3. POK pin must be disconnected from IN pin. 4. Test condition for DFN3030-10: Device mounted on FR-4 2-layer board, 2oz copper, with minimum recommended pad on top layer and 6 vias to bottom layer 1.0”x1.5” ground plane. 5. Test condition for SOP-8L-EP: Device mounted on 2" x 2" FR-4 substrate PCB, 2oz copper, with minimum recommended pad on top layer and thermal vias to bottom layer ground plane. Typical Performance Characteristics AP7167 Document number: DS31252 Rev. 7 - 2 4 of 14 www.diodes.com September 2010 © Diodes Incorporated AP7167 1.2A LOW DROPOUT REGULATOR WITH POK Output Voltage vs. Temperature Output Voltage vs. Tem perature 3.40 1.30 VOUT = 1.2V Output Voltage (V) Output Voltage (V) VOUT = 3.3V 3.35 3.30 3.25 1.25 1.20 1.15 1.10 3.20 -50 -25 0 25 50 75 100 -50 125 -25 0 Quiescent Current vs. Input Voltage 140 125 110 95 Iout=0mA Iout=500mA Quiescent Current ( μ A) Quiescent Current (μA) 155 80 75 100 125 VOUT=1.8V 170 160 150 140 130 120 110 VIN=2.5V VIN=3.3V 100 4.0 4.3 4.6 4.9 5.2 5.5 0.0 0.2 0.4 0.6 Input Voltage (V) 0.8 1.0 1.2 IOUT (A) Reference Voltage vs. Temperature Quiescent Current vs. Tem perature 0.810 155 140 125 110 VIN=2.2V, Vout=1.0V 95 VIN=3.3V, Vout=1.8V Reference Voltage (V) 170 Quiescent Current ( π A) 50 Quiescent Current vs. IOUT VOUT=3.3V 170 25 Tem perature ( 0C) 0 Temperature ( C) 0.805 0.800 0.795 Vin=2.2V Vin=3.3V Vin=5.5V VIN=5.0V, Vout=3.3V 0.790 80 -50.0 -25.0 0.0 25.0 50.0 75.0 100.0 125.0 -50 -25 0 25 50 75 100 125 0 Temperature ( C) 0 Tem perature ( C) Typical Performance Characteristics (Continued) AP7167 Document number: DS31252 Rev. 7 - 2 5 of 14 www.diodes.com September 2010 © Diodes Incorporated AP7167 1.2A LOW DROPOUT REGULATOR WITH POK Load Regulation Line Regulation VOUT=1.8V, IOUT=1mA 0.10 VIN=2.2V, VOUT=1.2V, 0.5 25°C Change in VOUT (%) Change in VOUT (%/V) 0.4 0.05 0.00 -0.05 25°C 85°C 85°C 0.3 -40°C 0.2 0.1 0.0 -0.1 -0.2 -0.3 -0.4 -40°C -0.5 -0.10 3.0 3. 5 4. 0 4. 5 5.0 0.0 5.5 0.4 0.8 IOUT (A) VIN (V) Short Circuit Current vs. Temperature Short Circuit Current vs. Input Voltage VOUT=1.2V VOUT=1.2V 0.80 Short Circuit Current (A) Short Circuit Current (A) 0.77 1.2 0.76 0.75 0.74 0.73 0.72 0.71 0.70 0.75 0.70 0.65 0.69 2.2 2.4 2.6 2.8 3 3.2 0.60 3.4 -50 Input Voltage (V) -25 0 25 50 75 o Temperature ( C) Dropout Voltage vs. IOUT PSRR -40 600 -45 -50 500 PS RR (dB) Dropout Voltage (mV) VOUT=3.3V 700 400 300 -55 -60 -65 -70 200 25°C 100 -75 85°C -40°C 0 0 0.2 0.4 0.6 0.8 1 1.2 -80 100 IOUT(A) AP7167 Document number: DS31252 Rev. 7 - 2 6 of 14 www.diodes.com 1000 10000 Frequency (Hz) 100000 September 2010 © Diodes Incorporated AP7167 1.2A LOW DROPOUT REGULATOR WITH POK Typical Performance Characteristics (Continued) Line Transient Response Line Transient Response VIN =3V to 5.5V VIN =5.5V to 3V COUT =10uF (Ceramic) COUT =10uF (Ceramic) IOUT =200mA IOUT =200mA VIN 2V/div VIN 2V/div VOUT 50mV/div VOUT 50mV/div Time (5ms/div) Time (500us/div) Output Load Transient Response (VOUT=1.8V) Output Load Transient Response (VOUT=3.3V) COUT=470uF (electrolytic) COUT=470uF (electrolytic) VOUT COUT=10uF (Ceramic) VOUT COUT=10uF (Ceramic) 100mV/div 100mV/div COUT=1uF (Ceramic) COUT=1uF (Ceramic) 1.2A 1.2A IOUT IOUT 1A/us 1A/us 500mA/div 500mA/div 50mA 50mA Time (100us/div) Time (100us/div) Start-up Time (VOUT=1.2V, IOUT=0.1A) Start-up Time (VOUT=1.2V, IOUT=1.2A) VEN 2V/div VEN 2V/div COUT=10uF COUT=10uF VOUT 1V/div VOUT 1V/div VPOK 2V/div VPOK 2V/div Time (50us/div) AP7167 Document number: DS31252 Rev. 7 - 2 Time (50us/div) 7 of 14 www.diodes.com September 2010 © Diodes Incorporated AP7167 1.2A LOW DROPOUT REGULATOR WITH POK Typical Performance Characteristics (Continued) Current Limit vs. Temperature Current Limit (A) 1.8 1.7 1.6 1.5 VIN =2.8V,Vout=1.8V VIN =3.3V,Vout=1.8V 1.4 -50 -25 0 25 50 75 100 o Temperature ( C) AP7167 Document number: DS31252 Rev. 7 - 2 8 of 14 www.diodes.com September 2010 © Diodes Incorporated AP7167 1.2A LOW DROPOUT REGULATOR WITH POK Application Notes Input Capacitor A 1μF ceramic capacitor is recommended to connect between IN and GND pins to decouple input power supply glitch and noise. The amount of the capacitance may be increased without limit. A lower ESR (Equivalent Series Resistance) capacitor allows the use of less capacitance, while higher ESR type requires more capacitance. This input capacitor should be located as close as possible to the device to assure input stability and less noise. For PCB layout, a wide copper trace is required for both IN and GND. Rearranging the equation will give the following equation to find the approximate resistor divider values: ⎛V ⎞ R1 = R2 ⎜⎜ OUT − 1⎟⎟ ⎝ VREF ⎠ To maintain the stability of the internal reference voltage, R2 needs to be kept smaller than 250kΩ. No Load Stability Output Capacitor The output capacitor is required to stabilize and help the transient response of the LDO. The AP7167 is designed to have excellent transient response for most applications with a small amount of output capacitance. The AP7167 is stable for all available types and values of output capacitors ≥ 4.7μF. The device is also stable with multiple capacitors in parallel, which can be of any type of value. Additional capacitance helps to reduce undershoot and overshoot during transient. This capacitor should be placed as close as possible to OUT and GND pins for optimum performance. 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. ENABLE/SHUTDOWN Operation The AP7167 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. Adjustable Operation The AP7167 provides output voltage from 0.8V to 5.0V through external resistor divider as shown below. VIN VOUT IN CIN 100kOhm OUT R1 AP7167 POK FB R2 Enable EN GND The output voltage is calculated by: ⎛ R ⎞ VOUT = VREF ⎜⎜1 + 1 ⎟⎟ ⎝ R2 ⎠ Where VREF=0.8V (the internal reference voltage) AP7167 Document number: DS31252 Rev. 7 - 2 COUT POWER-OK The Power-Ok (POK) pin is an active high open-drain output. It can be connected to any 5.5V or lower rail through an external pull-up resistor. The recommended sink current of POK pin is up to 4mA, so the pull-up resistor for POK should be in the range of 10kΩ to 1MΩ. If output voltage monitoring is not needed, the POK pin can be left floating. 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 1.6A (1.2A min) to prevent over-current and to protect the regulator from damage due to overheating. Short Circuit Protection When OUT pin is short-circuited to GND or OUT pin voltage is less than 200mV, short circuit protection will be triggered and clamp the output current to approximately 750mA. This feature protects the regulator from overcurrent and damage due to overheating. 9 of 14 www.diodes.com September 2010 © Diodes Incorporated AP7167 1.2A LOW DROPOUT REGULATOR WITH POK Application Notes (Continued) Low Quiescent Current Power Dissipation The AP7167, consuming only around 150µA for all input range and output loading, provides great power saving in portable and low power applications. 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 ensuring reliable operation. Power dissipation of the device depends on input voltage and load conditions and can be calculated by: Wide Output Range The AP7167, with a wide output range of 0.8V to 5.0V, provides a versatile solution for many portable and low power applications. Thermal Shutdown Protection Thermal protection disables the output when the junction temperature rises to approximately +155°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. PD = ( VIN − VOUT )xIOUT The AP7167 is available in the DFN3030-10 and SOP-8LEP packages, both with exposed pad, which is the primary conduction path for heat to the printed circuit board (PCB). The pad can be connected to ground or be left floating; however, to ensure the device will not overheat, it should be attached to an appropriate amount of copper PCB area. However, the maximum power dissipation that can be handled by the device depends on the maximum junction to ambient thermal resistance, maximum ambient temperature, and maximum device junction temperature, which can be approximated by the equation below: PD (max@ TA ) = AP7167 Document number: DS31252 Rev. 7 - 2 10 of 14 www.diodes.com ( +150°C − TA ) R θJA September 2010 © Diodes Incorporated AP7167 1.2A LOW DROPOUT REGULATOR WITH POK Ordering Information AP7167 - XX G - X Device Green Packing FN : DFN3030-10 SP : SOP-8L-EP G : Green 7/13 : Tape & Reel Package Code Packaging (Note 6) FN SP DFN3030-10 SOP-8L-EP AP7167-FNG-7 AP7167-SPG-13 Notes: Package 7”/13” Tape and Reel Quantity 3000/Tape & Reel 2500/Tape & Reel Part Number Suffix -7 -13 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. Marking Information (1) DFN3030-10 ( Top View ) 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 XX YWX Part Number AP7167 Package DFN3030-10 Identification Code B4 (2) SOP-8L-EP ( Top View ) 8 5 Logo Part No. AP7167 YY WW X X E 1 AP7167 Document number: DS31252 Rev. 7 - 2 G : Green YY : Year : 08, 09,10~ WW : Week : 01~52; 52 represents 52 and 53 week X : Internal Code SOP-8L-EP 4 11 of 14 www.diodes.com September 2010 © Diodes Incorporated AP7167 1.2A LOW DROPOUT REGULATOR WITH POK Package Outline Dimensions (Continued) (1) Package Type: DFN3030-10 0.15 TOP MARK 0.10 C 0.08 C Top View 0.25 A 0.60 A 1.80 0.15 0/0.02 C 2.9/3.1 2.3/2.5 B 0.15 R0 .30 0.25/0.55 1.5/1.7 2.9/3.1 (Pin #1 ID) 2X- 0.50Typ. 10x-0.30 Side View 2X- 0.57/0.63 Seating Plane 2.60 Land Pattern Recommendation (Unit:mm) 0.25 B 0.375Typ. 0.50Typ. 0.20/0.30 0.10 C A B Bottom View (2) Package Type: SOP-8L-EP Detail "A" Exposed pad 2.4Ref. 3.70/4.10 45° 0.35max. 3.85/3.95 5.90/6.10 7°~9° 7°~9° 1 1 0.15/0.25 Bottom View 1.75max. 1.30/1.50 3.3Ref. 0/0.13 0.254 0.3/0.5 1.27typ 4.85/4.95 1 Gauge Plane Seating Plane 0.62/0.82 Detail "A" 8x-0.60 5.4 Exposed pad 8x-1.55 6x-1.27 Land Pattem Recommendation (Unit:mm) Notes: 7. All dimensions are in millimeters. Angles are in degrees. 8. Coplanarity applies to the exposed heat sink slug as well as the terminals. AP7167 Document number: DS31252 Rev. 7 - 2 12 of 14 www.diodes.com September 2010 © Diodes Incorporated AP7167 1.2A LOW DROPOUT REGULATOR WITH POK Taping Orientation (Note 9) For DFN3030-10 Notes: 9.The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf. AP7167 Document number: DS31252 Rev. 7 - 2 13 of 14 www.diodes.com September 2010 © Diodes Incorporated AP7167 1.2A LOW DROPOUT REGULATOR WITH POK 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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