AP3418 DIODES | Alldatasheet
Document overview
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Technical content
Features
Input Voltage Range: 2.5V to 5.5V Output Voltage: 0.6V to VIN ADJ Output Fixed 1.4MHz Frequency High Efficiency up to 95% Output Current: 1.5A Current Mode Control 100% Duty Cycle in Dropout Built-in Over Current Protection Built-in Short Circuit Protection Built-in Thermal Shutdown Protection Built-in UVLO Function Built-in Soft-start Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) SOT25
Applications
LCD TV Set-top Box Datacom Portable Device Smart Phone Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Hal ogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. Typical Applications Circuit AP3418-ADJ L COUTCIN VIN R2 R1 VOUT 4.7F 2.2H 22F EN VIN SW FB GND 4 3 3 4 5EN GND SW FB VIN
Document number: DS37233 Rev. 3 - 2 2 of 11 www.diodes.com November 2014 © Diodes Incorporated AP3418 A Product Line of Diodes Incorporated Pin Descriptions Pin Number Pin Name Function 1 EN Control input pin. Forcing this pin above 1.5V enables the IC. Forcing this pin below 0.4V shuts down the IC. When the IC is in shutdown mode, all functions are disabled to decrease the supply current below 1µA
2 GND Ground pin
3 SW Power switch output pin. Inductor connection to drain of the internal PFET and NFET switches 4 VIN Supply input pin. Bypass to GND with a 4.7µF or greater ceramic capacitor 5 FB This is the feedb ack pin of the device. Connect this pin directly to the output if the fixed output voltage version is used. For the adjustable version, an external resistor divider is connected to this pin Functional Block Diagram VOLTAGE REFERENCE OSCILLATOR CURRENT SENSE ERROR AMPLIFIER PWM COMPARATOR MAX CURRENT LIMIT 0.6V VOCP 0.4V LOGIC CLK DRIVER SHORT CIRCUIT PROTECTION REVERSE COMPARATOR EN FB GND SW GNDVIN VIN 4 2
Document number: DS37233 Rev. 3 - 2 3 of 11 www.diodes.com November 2014 © Diodes Incorporated AP3418 A Product Line of Diodes Incorporated Absolute Maximum Ratings (Note 4) Symbol Parameter Rating Unit VIN Input Voltage -0.3 to 6.0 V VFB Feedback Voltage -0.3 to VIN +0.3 V VEN EN Pin Voltage -0.3 to VIN+0.3 V VSW SW Pin Voltage -0.3 to VIN+0.3 (Note 5) V θJA Thermal Resistance 265 ºC/W TJ Operating Junction Temperature +150 ºC TSTG Storage Temperature -65 to +150 ºC TLEAD Lead Temperature (Soldering, 10sec) +260 ºC – ESD(Machine Model) 200 V – ESD(Human Body Model) 2000 V Notes: 4. Stresses greater than those listed un der “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 Operati ng Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability . 5. DC voltage rating, for short period of spike voltage, the minimum voltage rating is -1V, in 20nS. Recommended Operating Conditions Symbol Parameter Min Max Unit VIN Input Voltage 2.5 5.5 V TA Operating Ambient Temperature -40 +85 ºC
Document number: DS37233 Rev. 3 - 2 4 of 11 www.diodes.com November 2014 © Diodes Incorporated AP3418 A Product Line of Diodes Incorporated Electrical Characteristics (VIN = 5V, TA = +25º C, unless otherwise specified.) Symbol Parameter Conditions Min Typ Max Unit VIN Input Voltage – 2.5 – 5.5 V IQ Quiescent Current VFB = 0.65V – 62 100 µA ISTBY Shutdown Supply Current VEN = GND – 0.1 1 µA VREF Reference Voltage For Adjustable Output Voltage 0.588 0.6 0.612 V IFB_H Feedback Bias Current µA IFB_L VFB = 0V -0.1 – 0.1 RDS(ON)_ P PMOSFET RON ISW = 200mA – 0.2 – Ω RDS(ON) _N NMOSFET RON ISW = -200mA – 0.15 – Ω ILIM Switch Current Limit VFB = 0.55V 1.8 2.3 – A VH EN Pin Threshold – 1.5 – – V VL – – – 0.4 VUVLO UVLO Threshold VIN Rising – 2.3 – V VHYS UVLO Hysteresis – – 0.2 – fOSC Oscillator Frequency – 1.12 1.40 1.68 MHz DMAX Max. Duty Cycle – 100 – – DMIN Min. Duty Cycle – – – 0 ISW_H SW Leakage Current VSW = 0V – 0.1 – µA ISW_L VSW = 5V – 0.1 – tSS Soft-start Time – – 1 – ms TOTSD Thermal Shutdown – – +160 – ºC THYS Thermal Shutdown Hysteresis – – +20 – ºC
Document number: DS37233 Rev. 3 - 2 5 of 11 www.diodes.com November 2014 © Diodes Incorporated AP3418 A Product Line of Diodes Incorporated Performance Characteristics (VIN = 5V, TA = +25º C, unless otherwise specified.) Efficiency vs. Output Current Efficiency vs. Input Voltage Reference Voltage vs. Temperature Switch Current Limit vs. Temperature Frequency vs. Input Voltage Frequency vs. Temperature -40 -20 0 20 40 60 80 100 120 140 1.8 2.0 2.2 2.4 2.6 2.8 Temperature ( o Switch Current Limit (A) VIN = 5.0V -40 -20 0 20 40 60 80 100 120 140 0.56 0.57 0.58 0.59 0.60 0.61 0.62 0.63 0.64 Temperature ( o Reference Voltage (V) VIN = 5.0V 1.20 1.25 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 Input Voltage (V) Frequency (MHz) -40 -20 0 20 40 60 80 100 120 140 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Temperature ( o Frequency (MHz) VIN = VEN = 5.0V 100 Input Voltage (V) Efficiency (%) VOUT = 1.8V IOUT = 1.5A 100 Output Current (A) Efficiency (%) VIN = 5.0V VOUT =1.8V
Document number: DS37233 Rev. 3 - 2 6 of 11 www.diodes.com November 2014 © Diodes Incorporated AP3418 A Product Line of Diodes Incorporated Performance Characteristics (Cont. VIN = 5V, TA = +25º C, unless otherwise specified.) RDS (ON)_UP vs. Temperature RDS (ON)_DOWN vs. Temperature Output Ripple (IOUT = 0A) Output Ripple (IOUT = 1.5A) Enable Turn on (IOUT = 1.5A) Enable Turn off (IOUT = 1.5A) -40 -20 0 20 40 60 80 100 120 140 0.0 0.1 0.2 0.3 0.4 0.5 Temperature ( o PMOS RDS(ON)_UP ( VIN = 5.0V ISW = 200mA -40 -20 0 20 40 60 80 100 120 140 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 Temperature ( o NMOS RDS(ON)_DOWN () VIN = 5.0V ISW = 200mA Time 1µs/div VSW 2V/div IL 1A/div VOUT_AC 10mV/div VSW 2V/div IL 200mA/div Time 10ms/div VOUT_AC 10mV/div Time 200μs/div VOUT 1V/div IL 1A/div VEN 5V/div VSW 2V/div Time 200μs/div VOUT 1V/div IL 1A/div VEN 5V/div VSW 2V/div
Document number: DS37233 Rev. 3 - 2 7 of 11 www.diodes.com November 2014 © Diodes Incorporated AP3418 A Product Line of Diodes Incorporated Performance Characteristics (Cont. VIN = 5V, TA = +25º C, unless otherwise specified.) Short Circuit Protection Short Circuit Protection Recovery (IOUT = 1.5A) (IOUT = 1.5A) IL 1A/div VOUT 2V/div VSW 5V/div IL 1A/div VOUT 2V/div VSW 5V/div Time 10ms/div Time 10ms/div
Document number: DS37233 Rev. 3 - 2 8 of 11 www.diodes.com November 2014 © Diodes Incorporated AP3418 A Product Line of Diodes Incorporated
Ordering Information
PackingPackageProduct Name TR : Tape & ReelK : SOT25 G1 : Green RoHS/Green Package Temperature Range Part Number Marking ID Packing SOT25 -40 to +85 ºC AP3418KTR-G1 G5E 3000/Tape & Reel Marking Information (Top View) : Logo G5E: Marking ID
Document number: DS37233 Rev. 3 - 2 9 of 11 www.diodes.com November 2014 © Diodes Incorporated AP3418 A Product Line of Diodes Incorporated Package Outline Dimensions (All dimensions in mm(inch).) (1) Package Type: SOT25 2.820(0.111) 2.650(0.104) 1.500(0.059) 0.000(0.000) 0.300(0.012) 0.950(0.037) 0.900(0.035) 0.100(0.004) 0.200(0.008) 0.300(0.012) 3.100(0.122) 1.700(0.067) 3.000(0.118) 0.500(0.020) 0.150(0.006) 1.300(0.051) 0.200(0.008) 0.600(0.024) 1.800(0.071) 2.000(0.079) 0.700(0.028) REF TYP 1.450(0.057) M AX
Document number: DS37233 Rev. 3 - 2 10 of 11 www.diodes.com November 2014 © Diodes Incorporated AP3418 A Product Line of Diodes Incorporated Suggested Pad Layout (1) Package Type: SOT25 Y X G Z Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) (mm)/(inch) (mm)/(inch)
Document number: DS37233 Rev. 3 - 2 11 of 11 www.diodes.com November 2014 © Diodes Incorporated AP3418 A Product Line of Diodes Incorporated 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 unde r its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diod es Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized applic ation, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising ou t of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product nam es and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems withou t the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided i n the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support d evices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety -critical, life support devices or systems, notwithstanding any devices - or systems -related information or support that may be provided by Diode s Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2014, Diodes Incorporated www.diodes.com