AP3405 DIODES | Alldatasheet
Document overview
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Technical content
Features
High-Efficiency Buck Power Converter Input Voltage Range: 2.3V to 5.5V Output Voltage Range: 0.7V to 5.5V Fixed 2.0MHz Oscillator Frequency Built-in Soft-Start Time Built-in Overcurrent Protection Built-in Thermal Shutdown Function Built-in UVLO Function Hiccup Mode SCP Output Current: 600mA Package: U-DFN2020-8 (Type E) Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) Pin 1 Mark EP NC NC PGND EN FB SW 3 6AGND VIN U-DFN2020-8 (Type E)
Applications
Post DC-DC Voltage Regulation Mobile Phones and Wearable Devices 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 Halogen- 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 L 2.2μH VIN CIN 4.7μF ON/OFF VIN EN SW FB AGND PGND VOUT 1.8V COUT 10μF 240KΩ 120KΩ Cff 22pF AP3405 8 3
Document number: DS38093 Rev. 1 - 2 2 of 9 www.diodes.com January 2016 © Diodes Incorporated ADVANCED INFORMATION AP3405 Pin Descriptions Pin Number Pin Name Function 1 , 2 NC No connection
3 AGND Signal Ground Pin
4 PGND Power Ground Pin
5 SW Power switch output pin. This pin is connected to the inductor. 6 VIN Supply power input pin. A capacitor should be connected between VIN pin and GND - to keep the input voltage constant. 7 FB Feedback pin. This pin is connected to an external resistor divider to program the system output voltage. 8 EN Control input pin. EN is a digital input that turns the regulator on or off. Drive EN high to turn the regulator on. Drive low to turn the regulator off. Functional Block Diagram 5 SW PGND Error Amplifier FB EN PWM Comparator Buffer & Dead Time Control Logic Control Logic Current Sensing Reverse Inductor Current Comparator Vin OVP Comparator OscillatorSlope Compensation OCP Comparator Soft Start Bias Generator Shutdown Comparator Bandgap Reference UVLO VIN AGND
Document number: DS38093 Rev. 1 - 2 3 of 9 www.diodes.com January 2016 © Diodes Incorporated ADVANCED INFORMATION AP3405 Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) (Note 4) Symbol Parameter Rating Unit VIN VIN Input Voltage -0.3 to 6.5 V VSW SW Pin Voltage -0.3 to VIN + 0.3 V VEN EN Pin Input Voltage -0.3 to 6.5 V VFB VFB Pin Voltage -0.3 to 6.5 V ISW SW Pin Output Current 1 A PD Power Dissipation (Standard Land Pattern) 640 mW TSTG Storage Temperature Range -55 to +125 °C VHBM ESD (Human Body Model) 2,000 V Note: 4. 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 Operati ng Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability . Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) Symbol Parameter Min Max Unit VIN Input Voltage 2.3 5.5 V TA Operating Ambient Temperature -40 +85 °C
Document number: DS38093 Rev. 1 - 2 4 of 9 www.diodes.com January 2016 © Diodes Incorporated ADVANCED INFORMATION AP3405 Electrical Characteristics (VIN = VEN = 3.6V (V OUT ≤ 2.6V), VIN = VEN = VOUT+1V (VOUT > 2.6V), unless otherwise specified. Specification with standard typeface are for TA = +25°C, and those in boldface type apply over the full operating temperature range (TA = -40°C to +85°C)) Symbol Parameter Conditions Min Typ Max Unit VIN Input Voltage 1.0V ≤ VOUT 2.3 – 5.5 V 0.9V ≤ VOUT < 1.0V 2.3 – 5.25 0.7V ≤ VOUT < 0.9V 2.3 – 4.5 IDD Supply Current VIN = VEN = VFB = 3.6V – 32 45 µA ISTDB Standby Current VIN = 5.5V, VEN = 0V – 0 5 µA VUVLO Input UVLO Threshold VIN Rising 2.0 2.1 2.2 V VHYS Input UVLO Hysteresis – – 0.1 – V VENH EN Active Threshold Voltage VIN = 5.5V 1.0 – – V VENL EN Shutdown Threshold Voltage VIN = 2.3V – – 0.4 V VFB Feedback Voltage VIN = VEN = 3.6V 0.591 0.600 0.609 V IFBH FB High Input Current VIN = VFB = 5.5V VEN = 0V -1 0 1 µA IFBL FB Low Input Current VEN = VFB = 0V VIN = 5.5V -1 0 1 µA RONH High-Side Switch On-Resistance VIN = 3.6V ISW = 100mA – 380 – mΩ RONL Low-Side Switch On-Resistance VIN = 3.6V ISW = 100mA – 300 – mΩ ILIMH SW Current Limit VIN = VEN = 3.6V 800 1,000 – mA fOSC Oscillator Frequency – 1.7 2.0 2.3 MHz DMAX Maximum Duty Cycle – 100 – – % TOTSD Thermal Shutdown – – +140 – °C THYS Thermal Shutdown Hysteresis – – +40 – °C tSS Soft-Start Time VIN = VEN = 3.6V – 150 300 µs
Document number: DS38093 Rev. 1 - 2 5 of 9 www.diodes.com January 2016 © Diodes Incorporated ADVANCED INFORMATION AP3405 Performance Characteristics (TA = +25°C, VIN = 3.6V, VOUT = 1.8V, unless otherwise specified.) Efficiency vs. Output Current Output Voltage vs. Output Current Supply Current vs. Input Voltage Feedback Voltage vs. Temperature PMOS RDSON vs. Temperature NMOS RDSON vs. Temperature -50 0 50 100 150 200 250 300 350 400 450 500 550 600 650 100 Efficiency (%) Output Current (mA) VOUT = 1.8V 0 100 200 300 400 500 600 1.775 1.780 1.785 1.790 1.795 1.800 1.805 1.810 1.815 Output Voltage (V) Output Current (mA) VIN = 3.6V -40 -20 0 20 40 60 80 100 120 140 0.50 0.52 0.54 0.56 0.58 0.60 0.62 0.64 0.66 0.68 Feedback Voltage (V) Temperature ( o VIN = 3.6V, Test Mode Supply Current (A) Input Voltage (V) VOUT = 1.8V, IOUT = 0A -60 -40 -20 0 20 40 60 80 100 120 140 240 260 280 300 320 340 360 380 400 420 440 PMOS RDSON (m) Temperature ( O ISW = 100mA -60 -40 -20 0 20 40 60 80 100 120 140 180 200 220 240 260 280 300 320 340 360 NMOS RDSON (m) Temperature ( O ISW = 100mA
Document number: DS38093 Rev. 1 - 2 6 of 9 www.diodes.com January 2016 © Diodes Incorporated ADVANCED INFORMATION AP3405 Performance Characteristics (continued) (TA = +25°C, VIN = 3.6V, VOUT = 1.8V, unless otherwise specified.) Output Ripple (IOUT = 0A) Output Ripple (IOUT = 0.6A) Enable Turn on Characteristic Enable Turn off Characteristic (Resistance Load, RLOAD = 3Ω) (Resistance Load, RLOAD = 3Ω) Short Current Protection SCP Recovery (Resistance Load, RLOAD =3Ω) (Resistance Load, RLOAD = 3Ω) VSW 5V/div VOUT-AC 20mV/div IL 500mA/div VSW 2V/div VOUT-AC 20mV/div IL 500mA/div VEN 2V/div VOUT 2V/div VSW 1V/div VEN 2V/div VOUT 2V/div VSW 1V/div VOUT 1V/div IL 500mA/div VSW 2V/div VOUT 1V/div IL 500mA/div VSW 2V/div Time 1.6ms/div Time 1µs/div Time 50µs/div Time 50µs/div Time 200µs/div Time 200µs/div
Document number: DS38093 Rev. 1 - 2 7 of 9 www.diodes.com January 2016 © Diodes Incorporated ADVANCED INFORMATION AP3405
Application Information
Please refer to the Typical Applications Circuit, and to set the circuit parameters please refer to the following descriptions. Undervoltage Lockout (UVLO) Circuit When the V IN drops lower than the UVLO detector threshold, the UVLO circuit starts to operate, V REF stops, and high -side switch and low -side switch built-in switch transistors turn “OFF”. As a result, V OUT drops according to the COUT capacitance value and the load. When the V IN is rising higher than UVLO released voltage, the IC will restart the operation. Short Circuit Protection and Recovery When the AP3405 output node is shorted to GND, as VFB drops under 0.3V, the chip will enter hiccup mode to protect itself, when short circuit is removed, and VFB rises over 0.4V, the AP340 5 recovers to normal operation again. If the AP340 5 reaches OCP threshold while short circuit, the AP3405 will enter cycle-by-cycle current limit mode until the current under OCP threshold. Input Overvoltage Protection When input voltage of AP340 5 is near 6.25V, the IC will enter Input -Overvoltage-Protection. It would be shut down and there will b e no output voltage in this state. As the input voltage goes down below 6V, it will leave input OVP and recover the output voltage. Over-Temperature Protection The internal thermal temperature protection circuitry is provided to protect the integrated ci rcuit in the event that the maximum junction temperature is exceeded. When the junction temperature exceeds +140°C, it shuts down the internal control circuit and switching power MOSFET. The AP3405 will restart automatically under the control of soft start circuit when the junction temperature decreases to +100°C.
Ordering Information
7 : Tape & ReelU-DFN2020-8 Device Package Code Packaging 7” Tape and Reel Quantity Part Number Suffix AP3405SHE-7 SHE U-DFN2020-8 3,000/Tape & Reel -7 Marking Information U-DFN2020-8 (Type E) ( Top View ) XX Y : Year : 0~9 X : Internal Code XX : Identification Code W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week Y W X Part Number Package Identification Code AP3405SHE U-DFN2020-8 2V
Document number: DS38093 Rev. 1 - 2 8 of 9 www.diodes.com January 2016 © Diodes Incorporated ADVANCED INFORMATION AP3405 Package Outline Dimensions (All dimensions in mm.) Please see AP02001 at http://www.diodes.com/_files/datasheets/ap02001.pdf for the latest version. (1) Package Type: U-DFN2020-8 (Type E) A A1 A3 Seating Plane D E e b L E2/2 Pin #1 ID z D2/2 R0.200 R0.120 Suggested Pad Layout Please see AP02001 at http://www.diodes.com/_files/datasheets/ap02001.pdf for the latest version. (1) Package Type: U-DFN2020-8 (Type E) X Y C G G U-DFN2020-8 (Type E) Dim Min Max Typ A 0.50 0.60 0.56 A1 0.00 0.05 0.02 A3 - - 0.203 b 0.20 0.30 0.25 D 1.950 2.075 2.00 D2 1.60 1.80 1.70 e 0.500 BSC E 1.950 2.075 2.00 E2 0.80 1.00 0.90 L 0.25 0.35 0.30 z - - 0.125 All Dimensions in mm Dimensions Value (in mm) C 0.500 G 0.150 X 0.350 X1 1.800 X2 1.850 Y 0.500 Y1 1.000 Y2 2.300
Document number: DS38093 Rev. 1 - 2 9 of 9 www.diodes.com January 2016 © Diodes Incorporated ADVANCED INFORMATION AP3405 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, e nhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability a rising out of the application or use of this document or any product descri bed herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such appli cations shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes 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 application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out 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 names 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 without 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 sustai n life and whose failure to perform when properly used in accordance with instructions for use provided in 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 regulat ory ramifications of their life support devices 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 s afety-critical, life support devices or systems, notwithstanding any devices - or systems -related information or support that may be provided by Diodes Incorporated. Further, Customers mu st 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 © 2016, Diodes Incorporated www.diodes.com