AP3433FNTR-G1

PART OBSOLETE – NO ALTERNATE PART AP3433 3A 2MHZ HIGH PERFORMANCE SYNCHRONOUS BUCK CONVERTER Pin Assignments The AP3433 is available in QFN-3×3-16 package.  Input Voltage Range: 2.95V to 5.5V  0.827V Reference Voltage with ±3% Precision  Two 45mΩ(typical) MOSFETs for High Efficiency at 3A Load  High Efficiency: up to 94%  Output Current: 3A  Programmable Frequency:300kHz to 2MHz  Current Mode Control  Synchronizes to External Clock  Adjustable Soft-start  Soft Start-up into Pre-biased Output  UV and OV Power Good Output  Built-in Over Current Protection  Built-in Thermal Shutdown Function  Programmable UVLO Function  Built-in Over Voltage Protection  Thermally Enhanced 3mm×3mm 16-pin QFN Document number: DS41485 Rev. 1 - 4 BOOT 13 SW 2 11 SW 10 SW 9 SS 3 GND 4 EP 5 6 7 8 QFN-3×3-16 Applications Features AP3433 14 12 GND Under voltage lockout is internally set at 2.6V, but can be increased by programming the threshold with a resistor network on the enable pin. The output voltage startup ramp is controlled by the soft-start pin. An open drain power good signal indicates the output is within 93% to 107% of its nominal voltage. 15 RT/CLK VIN The switching frequency of AP3433 can be programmable from 300kHz to 2MHz, which allows small-sized components, such as capacitors and inductors. A standard series of inductors from several different manufacturers are available. This feature greatly simplifies the design of switch-mode power supplies. 16 1 COMP VIN PGD Pin 1 Mark FB The device integrates two N-channel power MOSFETs with low onresistance. Current mode control provides fast transient response and cycle-by-cycle current limit. EN (Top View) VIN OBSOLETE – PART DISCONTINUED The AP3433 is a current mode, PWM synchronous buck (step-down) DC-DC converter, capable of driving a 3A load with high efficiency, excellent line and load regulation. AGND Description  Low-voltage, High-density Power Systems  Point of Load Regulation for Consumer Applications such as Set Top Boxes, LCD Displays, CPE Equipment 1 of 11 www.diodes.com October 2018 © Diodes Incorporated PART OBSOLETE – NO ALTERNATE PART AP3433 Typical Applications Circuit U1 VIN=5V 16 OBSOLETE – PART DISCONTINUED 1 C2 C3 C1 10mF 0.1mF R4 R1 100kΩ 2 14 15 7 8 R2 9 L1 1.5mH VIN SW VIN SW VIN SW EN AP3433 12 C10 2.2nF (Optional) 6 FB GND RT/CLK GND AGND C6 0.1mF 13 COMP SS R8 2.2Ω (Optional) 11 BOOT PGD VOUT=1.8V 10 R6 12kΩ 3 4 R7 10kΩ C8 22mF C9 22mF 5 R3 7.5kΩ C5 Optional C4 3.3nF R5 180kΩ C7 0.01mF Pin Descriptions Pin Number Pin Name Function 1,2,16 VIN Supply input pin. A capacitor should be connected between the VIN and GND pin to keep the DC input voltage constant 3,4 GND Power ground. This pin should be electrically connected to the power pad under the IC 5 AGND 6 FB 7 COMP Compensation pin. This pin is the output of the transconductance error amplifier and the input to the current comparator. Connect external compensation elements to this pin to stabilize the control loop 8 RT/CLK Resistor timing or external clock input pin 9 SS Soft-start pin. An external capacitor connected to this pin sets the output voltage rise time. This pin can also be used for tracking 10,11,12 SW Internal power switch output pin. This pin is connected to the inductor and bootstrap capacitor 13 BOOT 14 PGD 15 EN AP3433 Document number: DS41485 Rev. 1 - 4 Analog ground. This pin should be electrically connected to GND close to the device Feedback pin. Inverting node of the transconductance error amplifier Bootstrap pin. A bootstrap capacitor is connected between the BOOT pin and SW pin. The voltage across the bootstrap capacitor drives the internal high-side power MOSFET Power good indicator output. Asserts low if output voltage is low due to thermal shutdown, overcurrent, over/under-voltage or EN shut down Enable pin, internal pull-up current source. Pull below 1.2V to disable. Float to enable. Can be used to set the on/off threshold (adjust UVLO) with two additional resistors 2 of 11 www.diodes.com October 2018 © Diodes Incorporated PART OBSOLETE – NO ALTERNATE PART AP3433 OBSOLETE – PART DISCONTINUED Functional Block Diagram AP3433 Document number: DS41485 Rev. 1 - 4 3 of 11 www.diodes.com October 2018 © Diodes Incorporated PART OBSOLETE – NO ALTERNATE PART AP3433 Absolute Maximum Ratings (Note 1) OBSOLETE – PART DISCONTINUED Symbol Parameter Value Unit VIN VIN Pin Voltage -0.3 to 6.5 V VEN EN Pin Voltage -0.3 to 6.5 V VSW SW Pin Voltage -0.3 to VIN+0.3 V VFB FB Pin Voltage -0.3 to 6.5 V VCOMP COMP Pin Voltage -0.3 to 6.5 V VPGD PGD Pin Voltage -0.3 to 6.5 V RT/CLK Pin Voltage -0.3 to 6.5 V VSS SS Pin Voltage -0.3 to 6.5 V θJA Thermal Resistance (Junction to Ambient) Thermal Resistance (Junction to Case) 70 ºC/W 5 ºC/W Operating Junction Temperature -40 to +125 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 VRT/CLK θJC (BOTTOM) TJ Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and Note 1: 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. Recommended Operating Conditions Symbol VIN IOUT(MAX) TA AP3433 Document number: DS41485 Rev. 1 - 4 Parameter Min Max Unit Input Voltage 2.95 5.5 V 3 _ A -40 +85 ºC Maximum Output Current Operating Ambient Temperature 4 of 11 www.diodes.com October 2018 © Diodes Incorporated PART OBSOLETE – NO ALTERNATE PART Electrical Characteristics AP3433 (VIN=2.95 to 5.5V, TA=25ºC, unless otherwise specified. Specifications with boldface type apply over full operating temperature range from -40 to +85ºC.) Symbol Parameters Conditions Min Typ Max Unit _ 2.95 _ 5.5 V _ 360 575 μA _ 2 5 μA Rising 1.16 1.25 1.37 V Falling _ 1.18 _ V _ _ 2.6 2.8 V _ _ 150 _ mV 0.802 0.827 0.852 V VBOOT-SW=5V _ 45 81 mΩ VBOOT-SW=2.95V _ 64 110 mΩ VIN=5V _ 42 81 mΩ VIN=2.95V _ 59 110 mΩ OBSOLETE – PART DISCONTINUED SUPPLY VOLTAGE (VIN PIN) VIN Input Voltage IQ Quiescent Current ISHDN Shutdown Supply Current VFB=0.9V,VIN=5V, TA=25C, RT=400kΩ VEN=0V,TA=25C 2.95V≤VIN≤5.5V ENABLE AND UVLO (EN PIN) VEN_H VEN_L VUVLO VHYS Enable Threshold Internal Under Voltage Lockout Threshold Internal Under Voltage Hysteresis VOLTAGE REFERENCE (FB PIN) VREF Voltage Reference 2.95V≤VIN≤5.5V MOSFET RON_H RON_L High Side Switch On-resistance Low Side Switch On-resistance CURRENT LIMIT ILIMIT Current Limit Threshold _ 4.2 6.6 _ A Thermal Shutdown _ _ +140 _ C Hysteresis _ _ +20 _ C THERMAL SHUTDOWN TTSD _ AP3433 Document number: DS41485 Rev. 1 - 4 5 of 11 www.diodes.com October 2018 © Diodes Incorporated PART OBSOLETE – NO ALTERNATE PART Electrical Characteristics AP3433 (Cont. VIN=2.95 to 5.5V, TA=25ºC, unless otherwise specified. Specifications with boldface type apply over full operating temperature range from -40 to +85ºC.) Symbol Parameters Conditions Min Typ Max Unit _ 300 _ 2000 kHz _ 300 _ 2000 kHz OBSOLETE – PART DISCONTINUED TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN) _ _ Switching Frequency Range (RT Mode) Switching Frequency Range (CLK Mode) fS Switching Frequency RT=400kΩ 400 500 600 kHz _ Minimum CLK Pulse Width _ 75 _ _ ns _ RT/CLK Voltage RT=400kΩ _ 0.5 _ V _ RT/CLK High Threshold _ _ 1.6 2.2 V _ RT/CLK Low Threshold _ 0.4 0.6 _ V BOOT Charge Resistor VIN=5V _ 16 _ Ω BOOT-SW UVLO VIN=2.95V _ 2.2 _ V BOOT (BOOT PIN) RBOOT _ SOFT START (SS PIN) ISS Charge Current VSS=0.4 _ 2.2 _ μA VSS SS to Reference Crossover 98% Nominal _ 1.1 _ V VFB Falling (Fault) _ 91 _ VFB Rising (Good) _ 93 _ VFB Rising (Fault) _ 107 _ VFB Falling (Good) _ 105 _ POWER GOOD (PGD PIN) VFB TH Feedback Threshold AP3433 Document number: DS41485 Rev. 1 - 4 %VREF 6 of 11 www.diodes.com October 2018 © Diodes Incorporated PART OBSOLETE – NO ALTERNATE PART AP3433 Performance Characteristics Supply Current vs. Input Voltage Supply Current vs. Temperature 470 430 425 460 450 410 440 Supply Current (mA) Supply Current (mA) 415 405 400 395 390 385 380 375 370 365 360 2.7 3.0 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4 430 420 410 400 390 VIN=5V 380 VFB=0.9V 370 -50 5.7 -25 0 25 50 75 100 125 150 o Input Voltage (V) Temperature ( C) Efficiency vs. Output Current UVLO Threshold vs. Temperature 100 2.60 95 2.55 90 2.50 80 2.45 UVLO Threshold (V) 85 Efficiency (%) 75 70 65 60 55 VOUT=1.8V 50 45 VIN=3.3V 40 VIN=5V 2.40 2.35 2.30 2.25 2.20 Start Switching Stop Switching 2.15 35 30 2.10 0 300 600 900 1200 1500 1800 2100 2400 2700 3000 -50 -25 0 25 50 75 100 125 150 o Output Current (mA) Temperature ( C) Switching Frequency vs. Temperature Reference Voltage vs. Temperature 1020 0.834 1010 0.832 1000 990 0.830 RT=180k Reference Voltage (V) Switching Frequency (kHz) OBSOLETE – PART DISCONTINUED 420 980 970 960 950 940 930 0.828 0.826 0.824 0.822 0.820 920 910 0.818 900 -50 -25 0 25 50 75 100 125 150 o Temperature ( C) AP3433 Document number: DS41485 Rev. 1 - 4 0.816 -50 -25 0 25 50 75 100 125 150 Temperature (C) 7 of 11 www.diodes.com October 2018 © Diodes Incorporated PART OBSOLETE – NO ALTERNATE PART AP3433 Performance Characteristics (Cont.) Switching Frequency vs. RT Resistance Low Frequency Range Switching Frequency vs. RT Resistance High Frequency Range 2000 800 Switching Frequency (kHz) Switching Frequency (kHz) OBSOLETE – PART DISCONTINUED 1900 700 600 500 400 300 1800 1700 1600 1500 1400 1300 1200 1100 1000 200 900 100 300 400 500 600 700 800 900 800 80 1000 100 120 140 160 180 200 RT Resistance (k) RT Resistance (k) Start up from VIN (VIN=5V, VOUT=1.8V, IOUT=3A) Disable IC (VIN=5V, VOUT=1.8V, IOUT=3A) VEN 2V/div VIN 2V/div VOUT 1V/div VOUT 1V/div VSS 2V/div VSS 2V/div IL 2A/div IL 2A/div Time 4ms/div Time 20μs/div Load Transient Response (VIN=5V, VOUT=1.8V, IOUT=0 to 3A) VOUT(AC) 200mV/div Synchronizing to External Clock (fCLOCK=2MHz) VCLOCK 2V/div VSW 2V/div IOUT 2A/div Time 200μs/div AP3433 Document number: DS41485 Rev. 1 - 4 Time 400ns/div 8 of 11 www.diodes.com October 2018 © Diodes Incorporated PART OBSOLETE – NO ALTERNATE PART AP3433 Performance Characteristics (Cont.) OBSOLETE – PART DISCONTINUED Short Circuit Protection (VIN=5V, VOUT=1.8V, IOUT=3A) VOUT 1V/div Short Circuit Recovery (VIN=5V, VOUT=1.8V, IOUT=3A) VOUT 1V/div VSS 2V/div VSS 2V/div VCOMP 0.5V/div VCOMP 0.5V/div IL 2A/div IL 2A/div Time 4ms/div Time 4ms/div Ordering Information AP3433 XX XX - XX Product Name Package Temperature Range QFN-3×3-16 -40 to +85ºC AP3433 Document number: DS41485 Rev. 1 - 4 Package Packing RoHS/Green FN : QFN-3x3-16 TR : Tape & Reel G1 : Green Part Number AP3433FNTR-G1 9 of 11 www.diodes.com Marking ID Packing B1D Tape & Reel October 2018 © Diodes Incorporated PART OBSOLETE – NO ALTERNATE PART AP3433 Package Outline Dimensions (All dimensions in mm(inch).) Package Type: QFN-3×3-16 OBSOLETE – PART DISCONTINUED (1) AP3433 Document number: DS41485 Rev. 1 - 4 10 of 11 www.diodes.com October 2018 © Diodes Incorporated PART OBSOLETE – NO ALTERNATE PART AP3433 IMPORTANT NOTICE OBSOLETE – PART DISCONTINUED 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 under 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 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 sustain 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 regulatory 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 safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes 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 © 2018, Diodes Incorporated www.diodes.com AP3433 Document number: DS41485 Rev. 1 - 4 11 of 11 www.diodes.com October 2018 © Diodes Incorporated