AP3417C
Document overview
- Manufacturer or author: Diodes Incorporated
- PDF pages: 13
Technical content
Features
High Efficiency Buck Power Converter Wide Input Voltage Range: 2.5V to 5.5V Adjustable Output Voltage: 0.6V to 0.9×VIN Low RDS(ON) Internal Switches: 200m (VIN = 5V) Built-In Power Switches for Synchronous Rectification with High Efficiency Output Current: 1.0A Feedback Voltage: 600mV 1.5MHz Constant Frequency Operation Thermal Shutdown Protection Low Dropout Operation at 100% Duty Cycle No Schottky Diode Required Input Over Voltage Protection Output Over Voltage Protection Over Current Protection Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) (Top View) EN GND LX FB VIN 3 4 NC EN VIN FB GND LX Pin 1 Mark 3 4 EP SOT-23-5 W-DFN2020-6 (Type US)
Applications
Post DC-DC Voltage Regulation PDA and Notebook Computer Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Haloge n- 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. NOT RECOMMENDED FOR NEW DESIGN USE AP3428/A
Document number: DS36516 Rev. 3 - 3 2 of 13 www.diodes.com July 2019 © Diodes Incorporated AP3417C Typical Applications Circuit VIN=2.5V to 5.5V L 2.2mH CIN 4.7mF AP3417C VIN GND EN LX FB COUT 10mF VOUT R2IR2 Component Guide VOUT (V) R1 (kΩ) R2 (kΩ) L (µH) 3.3 450 100 2.2 2.5 320 100 2.2 1.8 200 100 2.2 1.2 100 100 2.2 1.0 66 100 2.2 Pin Descriptions Pin Number Pin Name Function SOT-23-5 W-DFN2020-6 (Type US) 1 2 EN Chip enable pin. Active high 2 5 GND Ground pin 3 4 LX Switch output pin 4 3 VIN Power supply 5 6 FB Feedback voltage of output — 1 NC No internal connection NOT RECOMMENDED FOR NEW DESIGN USE AP3428/A
Document number: DS36516 Rev. 3 - 3 3 of 13 www.diodes.com July 2019 © Diodes Incorporated AP3417C Functional Block Diagram Over - Current Comparator Bias Generator Saw-tooth Generator Oscillator Soft Start Bandgap Reference Current Sensing Control Logic Buffer & Dead Time Control Logic Reverse Inductor Current ComparatorOver Voltage Comparator ModulatorError Amplifier + - GND EN FB LX 1(2) VIN 4(3) 3(4) 2(5) 5(6) A(B) A for SOT-23-5 B for W-DFN2020-6 (Type US) IOVP Comparator Absolute Maximum Ratings (Note 4) Symbol Parameter Rating Unit VIN Input Voltage for the MOSFET Switch 0 to 6.0 V VEN Enable Input Voltage -0.3 to VIN +0.3 V ILX LX Pin Switch Current 1.8 A PD Power Dissipation (On PCB, TA = +25°C) SOT-23-5 0.4 W W-DFN2020-6 (Type US) 1.89 θJA Thermal Resistance (Junction to Ambient, Simulation) SOT-23-5 250 °C/W W-DFN2020-6 (Type US) 53 θJC Thermal Resistance (Junction to Case, Simulation) SOT-23-5 130 °C/W W-DFN2020-6 (Type US) 25 TJ Operating Junction Temperature +155 °C TSTG Storage Temperature -55 to +150 °C TOP Operating Temperature -40 to +85 °C VMM ESD (Machine Model) 200 V VHBM ESD (Human Body Model) 2000 V Note 4: Stresses greater than those listed under “Absolute Maximum Ratings” can 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 can affect device reliability. NOT RECOMMENDED FOR NEW DESIGN USE AP3428/A
Document number: DS36516 Rev. 3 - 3 4 of 13 www.diodes.com July 2019 © Diodes Incorporated AP3417C Recommended Operating Conditions Symbol Parameter Min Max Unit VIN Supply Input Voltage 2.5 5.5 V TA Operating Ambient Temperature -40 +85 °C TJ Operating Junction Temperature -40 +125 °C Electrical Characteristics (@VIN = VEN = 5V, VOUT = 1.2V, VFB = 0.6V, L = 2.2µH, CIN = 4.7µF, COUT = 10µF, TA = +25° C, unless otherwise specified.) Symbol Parameters Conditions Min Typ Max Unit VIN Input Voltage Range — 2.5 — 5.5 V IOFF Shutdown Current VEN = 0 — — 0.1 µA ION Active Current VFB = 0.55V — 220 — µA VFB Regulated Feedback Voltage — 0.588 0.6 0.612 V VOUT/VOUT Regulated Output Voltage Accuracy VIN = 2.5V to 5.5V, IOUT = 0 to 1.0A -3 — 3 % IPK Peak Inductor Current — 1.5 1.9 — A RDS(ON)P PMOSFET RDS(ON) VIN = 5V — 200 — mΩ RDS(ON)N NMOSFET RDS(ON) VIN = 5V — 200 — mΩ VEN_H EN High Level Input Voltage — 1.5 — — V VEN_L EN Low Level Input Voltage — — — 0.4 V IEN EN Input Current — — — 0.1 µA tSS Soft Start Time — — 400 — µs DMAX Maximum Duty Cycle — 100 — — % VUVLO Under Voltage Lock Out Threshold Rising — 2.3 — V Falling — 2.1 — Hysteresis — 0.2 — TSD Thermal Shutdown Hysteresis = +30° C — +155 +160 °C NOT RECOMMENDED FOR NEW DESIGN USE AP3428/A
Document number: DS36516 Rev. 3 - 3 5 of 13 www.diodes.com July 2019 © Diodes Incorporated AP3417C Performance Characteristics (@VIN = 5V, TA = +25° C, unless otherwise specified.) Efficiency vs. Output Current Regulated Feedback Voltage vs. Temperature Output Ripple (IOUT=0A) Output Ripple (IOUT=1A) Enable Turn On (IOUT=1A) Enable Turn Off (IOUT=1A) 100 Output Current (A) Efficiency (%) VIN=5.0V VOUT=1.0V VOUT=1.2V VOUT=1.8V VOUT=2.5V VOUT=3.3V -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 0.70 Temperature ( o Regulated Feedback Voltage (V) VIN=5.0V VOUT_AC 10mV/div VSW 2V/div IL 500mA/div Time 800µs/div VOUT_AC 10mV/div VSW 2V/div IL 1A/div Time 400ns/div VOUT 1V/div VSW 5V/div IL 500mA/div Time 200µs/div VOUT 1V/div VSW 5V/div IL 500mA/div Time 800µs/div VEN 5V/div VEN 5V/div NOT RECOMMENDED FOR NEW DESIGN USE AP3428/A
Document number: DS36516 Rev. 3 - 3 6 of 13 www.diodes.com July 2019 © Diodes Incorporated AP3417C Performance Characteristics (continued) (@VIN = 5V, TA = +25° C, unless otherwise specified.) Short Circuit Protection (IOUT=1A) Short Circuit Protection Recovery (IOUT=1A) VOUT 1V/div VSW 5V/div IL 2A/div Time 200µs/div VOUT 1V/div VSW 5V/div IL 2A/div Time 200µs/div NOT RECOMMENDED FOR NEW DESIGN USE AP3428/A
Document number: DS36516 Rev. 3 - 3 7 of 13 www.diodes.com July 2019 © Diodes Incorporated AP3417C
Application Information
Typical application circuit is shown in the Typical Applications Circuit and for the circuit parameters setting please refers to the following descriptions. Under Voltage 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 AP3417C output node is shorted to GND that VFB drops under 0.42V, AP3417C will enter hiccup mode to protect itself. If short circuit is removed, and VFB rises over 0.42V, the AP3417C recovers to normal operation again. If the AP34 17C reaches OCP threshold while short circuit, the AP3417C will enters cycle by cycle current limit mode until the current under OCP threshold. Over Temperature Protection The internal thermal temperature protection circuitry is provided to protect the integr ated circuit in the event that the maximum junction temperature is exceeded. When the junction temperature exceeds +160° C, it shuts down the internal control circuit and switching power MOSFET. The AP3417C will restart automatically under the control of soft start circuit when the junction temperature decreases to +145° C. Setting the Output Voltage The output voltage can be adjusted from 0.6V to 0.9*VIN using an external resistor divider. Table 1 shows a list of resistor selections for common output voltages. Resistor R1 is selected based on a design tradeoff between efficiency and output voltage accuracy. For high values of R1 there is less current consumption in the feedback network. However the tradeoff is output voltage accuracy due to the bias curre nt in the error amplifier. Meanwhile, the input capacitor should close to IC for preventing unexpected influences. VOUT (V) R1 (kΩ) R2 (kΩ) L (µH) 3.3 450 100 2.2 2.5 320 100 2.2 1.8 200 100 2.2 1.2 100 100 2.2 1.0 66 100 2.2 Table1. Resistor Selection for Common Output Enable Control Input Force this pin voltage above 1.5V enables the chip, and below 0.4V shuts down the device. When using this function to control input, please note the following information. Pay attention to input voltage, if inpu t voltage is less than 5.2V, all functions work well without other concerns. If input voltage is higher than 5.2V, please confirm that EN pin must be connected to VIN directly without the capacitor from EN to GND. NOT RECOMMENDED FOR NEW DESIGN USE AP3428/A
Document number: DS36516 Rev. 3 - 3 8 of 13 www.diodes.com July 2019 © Diodes Incorporated AP3417C
Ordering Information
AP3417C XX XX – XX PackingPackageProduct Name TR : Tape & ReelK : SOT-23-5 G1 : RoHS Compliant and Green RoHS/Green DN : W-DFN2020-6 (Type US) Package Temperature Range Part Number Marking ID Packing SOT-23-5 -40 to +85ºC AP3417CKTR-G1 G4I 3000 / Tape & Reel W-DFN2020-6 (Type US) -40 to +85ºC AP3417CDNTR-G1 BH 3000 / Tape & Reel Marking Information (1) SOT-23-5 (Top View) (2) W-DFN2020-6 (Type US) (Top View) First Line: Logo and Marking ID (See Ordering Information) First Line: Logo and Marking ID (See Ordering Information) NOT RECOMMENDED FOR NEW DESIGN USE AP3428/A
Document number: DS36516 Rev. 3 - 3 9 of 13 www.diodes.com July 2019 © Diodes Incorporated AP3417C Package Outline Dimensions (All dimensions in mm(inch).) (1) Package Type: SOT-23-5 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 NOT RECOMMENDED FOR NEW DESIGN USE AP3428/A
Document number: DS36516 Rev. 3 - 3 10 of 13 www.diodes.com July 2019 © Diodes Incorporated AP3417C Package Outline Dimensions (continued) Please see http://www.diodes.com/package-outlines.html for the latest version. (2) Package Type: W-DFN2020-6 (Type US) W-DFN2020-6 (Type US) Dim Min Max Typ A 0.70 0.80 0.75 A1 0.00 0.05 -- A3 0.20 REF b 0.25 0.35 0.30 D 1.95 2.075 2.00 D2 1.35 1.60 1.50 E 1.95 2.075 2.00 E2 0.65 0.90 0.80 e 0.65 BSC L 0.25 0.45 0.35 All Dimensions in mm D E e b L A A1 A3 Seating Plane Pin #1 ID NOT RECOMMENDED FOR NEW DESIGN USE AP3428/A
Document number: DS36516 Rev. 3 - 3 11 of 13 www.diodes.com July 2019 © Diodes Incorporated AP3417C Suggested Pad Layout (1) Package Type: SOT-23-5 Y X G Z Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) (mm)/(inch) (mm)/(inch) NOT RECOMMENDED FOR NEW DESIGN USE AP3428/A
Document number: DS36516 Rev. 3 - 3 12 of 13 www.diodes.com July 2019 © Diodes Incorporated AP3417C Suggested Pad Layout (continued) Please see http://www.diodes.com/package-outlines.html for the latest version. (2) Package Type: W-DFN2020-6 (Type US) Dimensions Value (in mm) C 0.650 X 0.350 X1 1.650 X2 1.550 Y 0.545 Y1 0.850 Y2 2.350 Y X C NOT RECOMMENDED FOR NEW DESIGN USE AP3428/A
Document number: DS36516 Rev. 3 - 3 13 of 13 www.diodes.com July 2019 © Diodes Incorporated AP3417C 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 describe d 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 unin tended or unauthorized application, 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 name s 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 system s 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 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 th at 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 © 2019, Diodes Incorporated www.diodes.com NOT RECOMMENDED FOR NEW DESIGN USE AP3428/A