AOZ2023 3A Ultra Low Dropout Linear Regulator General Description Features The AOZ2023 is a 3A ultra low dropout linear regulator designed for desktop motherboard, graphic card and notebook applications. This device needs dual supplies, a control voltage for the control circuitry and an input voltage for power conversion. The AOZ2023 delivers high-current and ultra low-drop output voltage for applications where VOUT is very close to VIN. Ultra low dropout linear regulator 1.3V~5.5V VIN supply voltage with external control voltage Dropout voltage (typical): - 180mV @ 2A High accuracy output voltage +1.5% Enable and Power Good The AOZ2023 features comprehensive control and protection functions: a power on reset (POR) circuit for monitoring both control and power inputs for proper operation; an EN input for enabling or disabling the device, a power OK with time delay for indicating the output voltage status, a current limit function, and a thermal shutdown function. VOUT pull low resistance when disabled Current limiting protection Thermal shutdown protection Output voltage adjustable Small footprint exposed pad SO-8 Package The AOZ2023 is available in exposed pad SO-8 package. Applications Desktop, notebook PCs Workstations Graphic cards Low voltage logic supplies Gaming SMPS post regulators Typical Application VOUT VIN C3 10F VOUT VIN R1 C1 AOZ2023 FB C6 10F/NI R2 EN C4 1F C5 22F POK C2 1F CNTL GND GND R3 Rev. 1.0 August 2015 www.aosmd.com Page 1 of 11 AOZ2023 Ordering Information Part Number Ambient Temperature Range Package Environmental AOZ2023PI -40 C to +85 C EPAD SO-8 Green Product AOS Green Products use reduced levels of Halogens, and are also RoHS compliant. Please visit www.aosmd.com/media/AOSGreenPolicy.pdf for additional information. Pin Configuration POK 1 EN 2 VIN 3 VCNTL 4 8 GND Exposed PAD 7 FB GND 6 VOUT 5 NC EPAD SO-8 (Top View) Pin Description Pin Number Pin Name 1 POK Power OK Indication. This pin is an open-drain output and is set high impedance once VOUT reaches 90% of its rating voltage. 2 EN Enable Input. Pulling this pin below 0.8V turns the regulator off, reducing the quiescent current to a fraction of its operating value. 3 VIN Input Voltage. This is the drain input to the power device that supply current to the output pin. Large bulk capacitors with low ESR should be placed physically close to this pin o prevent the input rail from dropping during large load transient. A 10F ceramic capacitor is recommended at this pin. 4 VCNTL Supply Input for Control Circuit. This pin provides bias voltage to the control circuitry and driver for the pass transistor. The driving capability of output current is proportioned to the VCNTL. For the device to regulate, the voltage on this pin must be at least 1.5V greater than the output voltage, and no less than VCNTL_min. 5 NC 6 VOUT Output Voltage. This pin is power output of the device. A pull low resistance exists when the device is disabled by pulling low the EN pin. 7 FB Feedback Voltage. This pin is the inverting input to the error amplifier. A resistor divider from the output to GND is used to set the regulation voltage as VOUT=0.8x(R1+R2)/R2 (V). 8 GND Ground. Exposed PAD GND Ground. The exposed pad acts the dominant power dissipation path and should be soldered to well design PCB pads. Rev. 1.0 August 2015 Pin Function Not Internally Connected. www.aosmd.com Page 2 of 11 AOZ2023 Block Diagram VCNTL EN OTP VIN POR Softstart & Control Logic OCP FB 0.8V Vref VOUT 0.2V POK Delay 90% Vref GND Absolute Maximum Ratings Recommended Operating Conditions Exceeding the Absolute Maximum Ratings may damage the device. The device is not guaranteed to operate beyond the Recommended Operating Conditions. Parameter VIN VCNTL VOUT Other Pins ESD Rating(1) Parameter Rating 1V to 6V Supply Voltage (VIN) 3V to 6V Supply Control Voltage (VCNTL) 1.3V to 5.5V 3V to 5.5V 0.8V to 6V Junction Temperature (TJ) -40C to +125C -0.3V to 6V Ambient Temperature (TA) -40C to +85C 2kV Note: 1. Devices are inherently ESD sensitive, handling precautions are required. Human body model rating: 1.5k in series with 100pF. Rev. 1.0 August 2015 Rating Power Dissipation (PD) Package Thermal Resistance EPAD SO-8 (JA) www.aosmd.com 2W 50C/W Page 3 of 11 AOZ2023 Electrical Characteristics TA = 25 C, VIN = 1.4V, VCNTL = VEN = 5V, CIN = COUT = 10F, unless otherwise specified. Specifications in BOLD indicate a temperature of -40C to +85C. Symbol Parameter Conditions Min. Typ. Max. Units 5.5 V INPUT STAGE VIN Input Voltage Range VCNTL Input Control Voltage VPOR POR VUVLO_HYS ICNTL VOUT = 1.2V, IOUT = 100mA 1.3 3 2.4 Under-Voltage Lockout Hysteresis Input Supply Current VFB Feedback Reference Voltage IFB Feedback Bias Current 2.7 5.5 V 3 V 300 EN = IN, VOUT = VFB, no load 0.5 1 mA 20 A 0.800 0.812 V EN = AGND TA = 25 C, no load 0.788 mV A 0.02 REGULATION VFB VDROP(2) Line Regulation (VIN) VIN = 1.4V to 5V, IOUT = 100mA, VOUT = 1.2V 0.015 0.15 % / V Load Regulation VIN = 1.8V, IOUT = 100mA to 2A, VOUT = 1.2V 0.45 1.5 % IOUT = 300mA, VEN = VCNTL = 5V, VOUT = 1.2V 40 50 mV IOUT = 2A, VEN = VCNTL = 5V, VOUT = 1.2V 180 250 mV Drop Voltage RPULL-DOWN VOUT Pull-down 90 ENABLE / POK VEN_HI Enable High Level VEN_LOW Disable Low Level 1.2 V 0.2 V Enable Bias Current VEN = 5.5V 12 A VPOK_TH POK Threshold VIN = VEN = VCNTL = 5V, No load, VOUT = 1.2V 90 % VPOK_HYS POK Hysteresis VIN = VEN = VCNTL = 5V, No load, VOUT = 1.2V 10 % TPOK_ON POK Time Delay (ON) VIN = VEN = VCNTL = 5V, No load, VFB > 90%*VREF 1 ms TPOK_OFF POK Time Delay (OFF) VIN = VEN = VCNTL = 5V, No load, VFB < 10%*VREF 50 s VPOK_LOW POK Pull-low Voltage POK sink current = 5mA IEN 0.35 V PROTECTION ILIM(3) Current Limit 3.5 VOUT < 0.2V A ISC Short Circuit Current 0.8 A TSD Thermal Shutdown Threshold 160 C TSD Thermal Shutdown Hysteresis 60 C Notes: 2. The dropout voltage is defined as VIN - VOUT, which is measured when VOUT is VOUT - 100mV. 3. The current limit was measured by the constant current limit value when VOUT is shorted directly. It is noted that the output capacitor current was not included. Rev. 1.0 August 2015 www.aosmd.com Page 4 of 11 AOZ2023 Functional Characteristics Circuit of Typical Application 1. TA = 25C, VIN = 1.5V, VCNTL = 5V, VOUT = 1.05V, unless otherwise specified. Load Transient Response (1A) Load Transient Response (3A) VO(AC) (10mV/div) VO(AC) (10mV/div) IO (1A/div) IO (1A/div) 2ms/div 2ms/div VIN Line Transient Response (0A) VIN Line Transient Response (2A) VIN (1V/div) VIN (1V/div) VO(AC) (10mV/div) VO(AC) (10V/div) IO (1A/div) IO (1A/div) 5ms/div 5ms/div Start-Up From Enable Start-Up From VIN VEN (2V/div) VIN (1V/div) VO (1V/div) VO (1V/div) VPOK (2V/div) VPOK (2V/div) IO (2A/div) IO (2A/div) 500s/div 500s/div Rev. 1.0 August 2015 www.aosmd.com Page 5 of 11 AOZ2023 Functional Characteristics (Continued) Circuit of Typical Application 1. TA = 25C, VIN = 1.5V, VCNTL = 5V, VOUT = 1.05V, unless otherwise specified. Start-Up From VCNTL Short Current Protection VCNTL (2V/div) VO (1V/div) VO (1V/div) VPOK (2V/div) IO (2A/div) IO (2A/div) 500s/div 500s/div Over Temperature Protection (VIN = 5V) Current Limit VIN (5V/div) VO (1V/div) VO (1V/div) IO (2A/div) 500s/div 20ms/div Rev. 1.0 August 2015 IO (2A/div) www.aosmd.com Page 6 of 11 AOZ2023 Typical Performance Characteristics Circuit of Typical Application 1. TA = 25C, VIN = 1.5V, VCNTL = 5V, VOUT = 1.05V, unless otherwise specified. Dropout Voltage vs. Load Current Current Limit vs. Temperature 4.0 250 90C 3.9 3.8 25C 150 -40C 100 Current Limit (A) Voltage Drop (mV) 200 3.7 3.6 3.5 3.4 3.3 3.2 50 3.1 3.0 -40 0 0 0.4 0.8 1.2 1.6 2.0 -20 0 Load (A) 0.11 1.50 0.10 1.45 0.09 0.08 0.07 0.06 0.05 0.04 0.03 -20 0 20 80 40 60 1.35 1.30 1.25 1.20 1.15 1.10 1.05 1.00 -40 80 -20 0 20 40 60 80 Temperature (C) VCNTL POR Threshold Voltage vs. Temperature Reference Voltage vs. Temperature 0.820 Reference Voltage (V) VCNTL POR Voltage (V) 60 1.40 Temperature (C) 3.00 2.95 2.90 2.85 2.80 2.75 2.70 2.65 2.60 2.55 2.50 2.45 2.40 -40 40 Short Circuit vs. Temperature Short Circuit Current (A) VCNTL Standby Current (A) VCNTL Standby Current vs. Temperature 0.02 0.01 -40 20 Temperature (C) 0.815 0.810 0.805 0.800 0.795 0.790 0.785 0.780 0.775 -20 0 20 40 60 80 0.770 -40 Temperature (C) Rev. 1.0 August 2015 -20 0 20 40 60 80 Temperature (C) www.aosmd.com Page 7 of 11 AOZ2023 Application Information Input / Output Capacitor Output Voltage Setting The output voltage can be set by the output voltage divider. Typically, the adjustable range of the output voltage is from 1V to (VIN - Vdrop). The output voltage is set by the equation below: R1 + R2 V OUT = 0.8V x ---------------------R2 A 10F or more capacitances for the input side (VIN) is necessary. This not only decouples the noise from input side, but also keeps the input impedance as low as possible. In addition, a 22F or more capacitances for the VIN above 4.5V is recommended for much lower input impedance. A 10F output capacitor is typically used with a 0.1F ceramic capacitor for the output terminal (VOUT). Internal type-II compensation network allows lower ESR capacitors without stability problem. Supply Voltage (VCNTL) Supply voltage is used to provide the power for the internal circuits. For the device to regulate, the voltage on this pin must be at least 1.5V greater than the output voltage, and no less than VCNTL_min. A 0.1F or more ceramic capacitor close to the pin is required to filter the control voltage. Enable (EN) The EN pin is used to turn off the regulator by pulling this pin below 0.8V. When the linear regulator is operated in the disable mode, the quiescent current can be limited below several ten micro-amp level. Rev. 1.0 August 2015 Power OK (POK) The POK pin is used to provide a logic signal to notice that the regulator works well. When the output voltage through the voltage divider is regulated above 90% of reference voltage, this pin will be as a high impedance status due to the open-drain output. An external pull-up resister is necessary to provide high-level signal. The sink capability of the POK pin is limited below 5mA. Typically, a 5.1k resister for the 5V is recommended. Over Temperature Protection (OTP) It is recommended that the junction temperature can be kept below the recommended operation condition 125 degree for maximum reliability. This power dissipation is conducted through the package into the ambient environment, and, in the process, the temperature of the die (TJ) rises above ambient. www.aosmd.com Page 8 of 11 AOZ2023 Package Dimensions, SO-8 EP1 Gauge plane 0.2500 D0 C L L1 E2 E1 E3 E L1' D1 Note 5 D 7 (4x) A2 e B A A1 Dimensions in millimeters RECOMMENDED LAND PATTERN 3.70 2.20 5.74 2.71 2.87 0.80 1.27 0.635 UNIT: mm Symbols A Min. 1.40 Nom. 1.55 A1 A2 B 0.00 1.40 0.31 0.05 1.50 0.406 C D 0.17 4.80 -- 4.96 D0 D1 E e E1 E2 E3 L y | L1-L1' | L1 3.20 3.10 5.80 -- 3.80 2.21 Max. 1.70 0.10 1.60 0.51 0.25 5.00 3.60 3.50 6.20 -- 4.00 2.61 3.40 3.30 6.00 1.27 3.90 2.41 0.40 REF 1.27 0.40 0.95 0.10 -- -- 0 -- 8 3 0.04 0.12 1.04 REF Dimensions in inches Symbols A A1 A2 B C D D0 D1 E e E1 E2 E3 L y | L1-L1' | L1 Min. 0.055 0.000 0.055 0.012 0.007 0.189 Nom. 0.061 0.002 Max. 0.067 0.004 0.059 0.016 -- 0.063 0.020 0.010 0.195 0.197 0.134 0.142 0.130 0.138 0.236 0.244 0.050 -- 0.153 0.157 0.095 0.103 0.016 REF 0.016 0.037 0.050 -- 0.004 -- 0.126 0.122 0.228 -- 0.150 0.087 0 -- 3 8 0.002 0.005 0.041 REF Notes: 1. Package body sizes exclude mold flash and gate burrs. 2. Dimension L is measured in gauge plane. 3. Tolerance 0.10mm unless otherwise specified. 4. Controlling dimension is millimeter, converted inch dimensions are not necessarily exact. 5. Die pad exposure size is according to lead frame design. 6. Followed from JEDEC MS-012 Rev. 1.0 August 2015 www.aosmd.com Page 9 of 11 AOZ2023 Tape and Reel Dimensions, SO-8 EP1 Carrier Tape P1 D1 P2 T E1 E2 E B0 K0 A0 D0 P0 Feeding Direction UNIT: mm Package SO-8 (12mm) A0 6.40 0.10 B0 5.20 0.10 K0 2.10 0.10 D0 1.60 0.10 D1 1.50 0.10 E 12.00 0.10 Reel E1 1.75 0.10 E2 5.50 0.10 P0 8.00 0.10 P1 4.00 0.10 P2 2.00 0.10 T 0.25 0.10 W1 S G N M K V R H W UNIT: mm W N Tape Size Reel Size M 12mm o330 o330.00 o97.00 13.00 0.10 0.30 0.50 W1 17.40 1.00 H K o13.00 10.60 +0.50/-0.20 S 2.00 0.50 G -- R -- V -- Leader/Trailer and Orientation Trailer Tape 300mm min. or 75 empty pockets Rev. 1.0 August 2015 Components Tape Orientation in Pocket www.aosmd.com Leader Tape 500mm min. or 125 empty pockets Page 10 of 11 AOZ2023 Part Marking AOZ2023PI (SO-8) Z2023PI FAYWLT Part Number Code Assembly Lot Code Fab & Assembly Location Year & Week Code LEGAL DISCLAIMER Alpha and Omega Semiconductor makes no representations or warranties with respect to the accuracy or completeness of the information provided herein and takes no liabilities for the consequences of use of such information or any product described herein. Alpha and Omega Semiconductor reserves the right to make changes to such information at any time without further notice. This document does not constitute the grant of any intellectual property rights or representation of non-infringement of any third party's intellectual property rights. LIFE SUPPORT POLICY ALPHA AND OMEGA SEMICONDUCTOR PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. Rev. 1.0 August 2015 2. A critical component in any component of a life support, device, or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.aosmd.com Page 11 of 11