AP2318A 1A ULDO REGULATOR WITH ENABLE Description Pin Assignments The AP2318A is a series of ultra low dropout regulators optimized for low voltage applications where transient response and minimum input voltage are critical. (Top View) The AP2318A provides current limit and thermal shutdown function. Its circuit includes a trimmed bandgap reference to assure output voltage accuracy to be within 1.5%. On-chip thermal shutdown provides protection against any combination of overload and ambient temperatures that would cause excessive junction temperatures. The AP2318A has adjustable version, which can set the output voltage through two external resistors. The AP2318A is available in the standard DFN-3x3-8 and PSOP-8 packages. DFN-3x3-8 (Top View) Features Wide Operating Voltage Ranges: 2.5V to 12V Output Voltage Accuracy: 1.5% On-chip Thermal Shutdown ESD Rating 3000V (Human Body Model) 600V (Machine Model) NC 1 8 GND EN 2 7 ADJ VIN 3 6 VOUT VIN 4 5 NC Operating Junction Temperature: -40C to +125C PSOP-8 Applications AP2318A Document number: DS41300 Rev. 2 - 2 Notebook USB Device Add-on Card DVD Player PC Motherboard 1 of 10 www.diodes.com August 2018 (c) Diodes Incorporated AP2318A Typical Applications Circuit VOUT VIN VIN VOUT AP2318A-ADJ EN CIN 1F R1 ADJ GND + + COUT 2.2F R2 ADJ Version, VOUT = 1.25*(R1+R2)/R2 Pin Description Pin Number Pin Name Function DFN-3x3-8 PSOP-8 1, 2 3, 4 VIN 3, 4 6 VOUT 5 7 ADJ Adjustable Voltage 6 8 GND Ground 7 1, 5 NC No Connection 8 2 EN On/Off Control AP2318A Document number: DS41300 Rev. 2 - 2 Input Voltage Output Voltage 2 of 10 www.diodes.com August 2018 (c) Diodes Incorporated AP2318A Functional Block Diagram VIN 1, 2 (3, 4) EN 8 (2) Enable Bandgap Reference 3, 4 (6) RC Compensation VOUT OVP 5 (7) ADJ 6 (8) GND Error VFB Amplifier Thermal Shutdown Current Limit A(B) A: DFN-3x3-8 B: PSOP-8 Absolute Maximum Ratings (Note 1) Symbol VIN Input Voltage TJ Operating Junction Temperature TSTG Storage Temperature Range TLEAD Lead Temperature (Soldering, 10sec) JA Notes: Parameter Thermal Resistance (Junction to Ambient) (Note 2) Rating Unit 15 V +150 C -65 to +150 C +260 C DFN-3x3-8 120 PSOP-8 108 C/W ESD ESD (Human Body Model) 3000 V ESD ESD (Machine Model) 600 V 1. Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. 2. Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction temperature, T J(Max), the junctionto-ambient thermal resistance, JA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: PD(Max) = (TJ(Max)-TA)/JA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. AP2318A Document number: DS41300 Rev. 2 - 2 3 of 10 www.diodes.com August 2018 (c) Diodes Incorporated AP2318A Recommended Operating Conditions Symbol Parameter Min Max Unit VIN Input Voltage 2.5 12 V VEN Enable Voltage -- 12 V Operating Junction Temperature Range -40 +125 C TJ Electrical Characteristics (Operating Conditions: 2.5V VIN 12V, CIN = 1F, COUT = 2.2F, TJ = +25C, unless otherwise specified. (P Maximum Power Dissipation). Limits appearing in Boldface type apply over the entire junction temperature range for operation of 40C to +125C.) Symbol Parameter Conditions Min Typ Max Unit 1.231 1.225 1.250 1.250 1.269 1.275 V Reference Voltage AP2318A-ADJ, IOUT = 10mA, VIN-VOUT = 2V, TJ = +25C, 10mA IOUT 1A, VOUT+2V VIN 12V Maximum Output Current VIN-VOUT = 2V 1.2 1.5 -- A -- 1 6 mV Line Regulation AP2318A-ADJ IOUT = 10mA, VOUT+2V VIN 12V IOUT = 10mA, 2.5V VIN 12V -- 1 6 mV AP2318A-ADJ VIN = VOUT+2V, 10mA IOUT 1A -- 1 15 mV VIN = 2.5V, 10mA IOUT 1A -- 1 15 mV Dropout Voltage VOUT (VREF) = 1%, VOUT > 2V, IOUT = 1A -- 0.5 -- V Adjust Pin Current -- -- 0.05 1 A Minimum Load Current VOUT+2V VIN 12V (ADJ only) -- 1.7 5 mA IQ Quiescent Current VIN = VOUT+2V, IOUT = 0mA -- 250 -- A VNOI RMS Output Noise (% of VOUT) TA = +25C, 10Hz f 20kHz -- 0.003 -- % -- Thermal Shutdown Temperature -- -- +150 -- C -- Thermal Shutdown Hysteresis -- -- +25 -- C Enable Logic Low -- -- 0.8 VEN Enable Input Voltage Enable Logic High 2.25 -- -- VEN = 2.25V -- 5 -- A VEN = 0.8V -- -- 4 A DFN-3x3-8 -- 15 -- PSOP-8 -- 12 -- VREF IOUT(Max) VRLINE VRLOAD VDROP IADJ ILOAD(Min) IEN JC Load Regulation V Enable Input Current Thermal Resistance (Junction to Case) AP2318A Document number: DS41300 Rev. 2 - 2 C/W 4 of 10 www.diodes.com August 2018 (c) Diodes Incorporated AP2318A Performance Characteristics Output Voltage vs. Output Current 3.0 3.0 2.8 2.8 2.6 2.6 2.4 2.4 2.2 2.2 2.0 2.0 Output Voltage (V) Output Voltage (V) Output Voltage vs. Input Voltage 1.8 1.6 1.4 AP2318A-ADJ VOUT=2.5V 1.2 o 1.0 TC=25 C IOUT=10mA IOUT=500mA IOUT=1000mA 0.8 0.6 0.4 AP2318A-ADJ VOUT=2.5V VIN=3.5V 1.8 1.6 1.4 o TC= -40 C 1.2 o TC=25 C 1.0 o TC=125 C 0.8 0.6 0.4 0.2 0.2 0.0 0.0 0 1 2 3 4 5 6 7 8 9 10 11 0 12 200 400 600 800 1000 1200 1400 1600 1800 2000 Input Voltage (V) Output Current (mA) Supply Current vs. Input Voltage Supply Current vs. Case Temperature 400 340 336 350 332 250 200 AP2318A-ADJ VOUT=1.25V 150 328 Supply Current (A) Supply Current (A) 300 o 324 320 316 312 TC=-40 C 100 o TC=25 C AP2318A-ADJ VIN=3.25V VOUT=1.25V 308 o 50 TC=125 C 304 0 300 0 1 2 3 4 5 6 7 8 -40 -20 0 20 18 18 16 16 Supply Current (mA) Supply Current (mA) 60 80 100 120 Supply Current vs. Output Current 20 14 12 AP2318A-ADJ VIN=3.25V VOUT=1.25V 8 40 Case Temperature ( C) Supply Current vs. Output Current 10 20 o Input Voltage (V) 6 o TC=25 C o TC=-40 C 4 14 12 10 AP2318A-ADJ VOUT=1.25V 8 o TC=25 C 6 VIN=3.25V VIN=2.5V VIN=12V 4 o TC=125 C 2 2 0 0 0 150 300 450 600 750 900 1050 1200 1350 1500 Output Current (mA) AP2318A Document number: DS41300 Rev. 2 - 2 0 150 300 450 600 750 900 1050 1200 1350 1500 Output Current (mA) 5 of 10 www.diodes.com August 2018 (c) Diodes Incorporated AP2318A Performance Characteristics (Cont.) Dropout Voltage vs. Output Current PSRR vs. Frequency 100 0.65 0.55 AP2318A-ADJ VOUT=2.5V 0.50 TC=-40 C 90 o 80 o TC= 25 C 0.45 70 o TC=125 C 0.40 PSRR (dB) Dropout Voltage (V) 0.60 0.35 0.30 0.25 60 50 40 0.20 30 0.15 20 AP2318A-ADJ VIN=3V to 4V VOUT=1.25V CIN=1F, COUT=2.2F ILOAD=10mA 0.10 10 0.05 0 0.00 0 100 200 300 400 500 600 700 800 900 10 1000 Output Current (mA) 10k 100k IOUT (500mA/Div) Load Transient Response (Conditions: VIN = 2.5V, VOUT = 1.8V, IOUT =1mA to 1A) CIN = 1F, COUT = 2.2F) VOUT (100mV/Div) IOUT (200mA/Div) VOUT (50mV/Div) Document number: DS41300 Rev. 2 - 2 1k Frequency (Hz) Load Transient Response (Conditions: VIN = 2.5V, VOUT = 1.25V, IOUT =1 to 500mA) CIN = 1F, COUT = 2.2F) AP2318A 100 6 of 10 www.diodes.com August 2018 (c) Diodes Incorporated AP2318A Ordering Information AP2318A X - X X X Product Name Package Output Voltage Packing E1/G1 MP : PSOP-8 DN : DFN-3x3-8 ADJ : Adjustable Output TR : Tape & Reel Blank : Tube E1 : RoHS Compliant G1 : RoHS Compliant and Green Package Temperature Range DFN-3x3-8 -40 to +125C PSOP-8 Part Number Marking ID Packing AP2318ADN-ADJTRG1 B7B Tube AP2318AMP-ADJE1 2318A-ADJE1 Tube AP2318AMP-ADJG1 2318A-ADJG1 Tube AP2318AMP-ADJTRE1 2318A-ADJE1 Tape & Reel AP2318AMP-ADJTRG1 2318A-ADJG1 Tape & Reel -40 to +125C AP2318A Document number: DS41300 Rev. 2 - 2 7 of 10 www.diodes.com August 2018 (c) Diodes Incorporated AP2318A Package Outline Dimensions (All dimensions in mm(inch).) (1) Package Type: DFN-3x3-8 AP2318A Document number: DS41300 Rev. 2 - 2 8 of 10 www.diodes.com August 2018 (c) Diodes Incorporated AP2318A Package Outline Dimensions (Cont. All dimensions in mm(inch).) (2) Package Type: PSOP-8 AP2318A Document number: DS41300 Rev. 2 - 2 9 of 10 www.diodes.com August 2018 (c) Diodes Incorporated AP2318A 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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