AP3401 DIODES | Alldatasheet
Document overview
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Technical content
Features
Output Current: Up to 1A Output Voltage: 0.6V to VIN Input Voltage: 2.5V to 5.5V 0.6V Reference Voltage With ± 2% Precision 40µA (Typ) No Load Quiescent Current Shutdown Current: <1µA 100% Duty Cycle Operation 1.5MHz Switching Frequency Internal Soft Start No External Compensation Required Current Limit Protection Thermal Shutdown TSOT26, U-DFN2020-6 (Type J) Packages Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) TSOT26 (Top View) U-DFN2020-6 (Type J)
Applications
Post DC-DC Voltage Regulation Set Top Boxes Notebook Computer PAD 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. EN LX VIN FB GND PG 3 4 Pin 1 Mark EN PG VIN FB GND LX P in 1 Mark 3 4
Document number: DS37389 Rev. 2 - 2 2 of 11 www.diodes.com June 2016 © Diodes Incorporated AP3401 NEW PRODUCT Typical Applications Circuit VIN EN LX FB L1 2.2mH CIN VIN=2.5V to 5.5V GND COUT 10mF VOUT=1.8V ON OFF AP3401 C1 22pF 300k 150k PG 10mF 100k Pin Descriptions Pin Number Pin Name Function TSOT26 U-DFN2020-6 (Type J) 1 1 EN Enable control input. Force this pin voltage above 1.5V enables the chip, and below 0.4V shuts down the device 2 5 GND Ground pin 3 4 LX The drains of the internal main and synchronous power MOSFET 4 3 VIN Bias supply. Chip main power supply pin 5 2 PG Power good indicator, open drain output. PG is pulled up to VIN when the output voltage is within 20% of the regulation level, otherwise it is low 6 6 FB Feedback voltage to internal error amplifier, the threshold voltage is 0.6V
Document number: DS37389 Rev. 2 - 2 3 of 11 www.diodes.com June 2016 © Diodes Incorporated AP3401 NEW PRODUCT Functional Block Diagram 1.5M OSC SLOPE COMP FREQ SHIFT S R Q QEA SWITCHING LOGIC AND BLOCKING CIRCUIT ANTI - SHOOT THRU PWM COMP IAMPFB EN VIN LX GNDSHUTDOWN ____ OSC V REF0.6 CONTROL LOGIC PG 4(3) 3(4) 2(5) 5(2) 1(1) 6(6) A(B) A for TSOT26 B for U-DFN2020-6 Absolute Maximum Ratings (Note 4) Symbol Parameter Rating Unit VIN Input Voltage -0.3 to 6 V VEN EN Pin Voltage -0.3 to VIN+0.3 V VLX LX Pin Voltage -0.3 to VIN+0.3 V VFB Feedback Pin Voltage -0.3 to VIN+0.3 V PD Power Dissipation (on PCB, TA = +25° C) TSOT26 0.4 W U-DFN2020-6 (Type J) 1.89 θJA Thermal Resistance (Junction to Ambient) TSOT26 220 ° C/W U-DFN2020-6 (Type J) 53 θJC Thermal Resistance (Junction to Case, Simulation) TSOT26 130 º C/W U-DFN2020-6 (Type J) 25 TJ Operating Junction Temperature +155 °C TSTG Storage Temperature -55 to +150 °C VMM ESD (Machine Model) 200 V VHBM ESD (Human Body Model) 2000 V VCDM ESD (Charge Device Mode) 1000 V Note 4: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent d amage 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 Condi tions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.
Document number: DS37389 Rev. 2 - 2 4 of 11 www.diodes.com June 2016 © Diodes Incorporated AP3401 NEW PRODUCT Recommended Operating Conditions Symbol Parameter Min Max Unit VIN Input Voltage Range 2.5 5.5 V TA Operating Ambient Temperature -40 +85 °C TJ Junction Temperature Range -40 +125 °C Electrical Characteristics (@VIN = 5V, VOUT = 1.2V, L = 2.2µH, CIN = COUT = 10µF, TA = +25° C, unless otherwise specified.) Symbol Parameter Condition Min Typ Max Unit VIN Input Voltage Range – 2.5 – 5.5 V VFB Regulated Feedback Voltage – 0.588 0.6 0.612 V IFB FB Leakage Current VFB = 1V – – 0.2 μA IQ Quiescent Current VFB = 0.65V – 40 – μA ISD Shutdown Current VEN = 0V – 0.1 1 μA ILIM Peak Inductor Current – 1.3 – – A fOSC Oscillator Frequency – – 1.5 – MHz RDS(ON) Drain to Source On-state Resistance ILX = 100mA, high side – 250 – mΩ ILX = 100mA, low side – 170 – VENH EN High Threshold – 1.5 – – V VENL EN Low Threshold – – – 0.4 V IEN EN Leakage Current VIN = VEN = 5V -1.0 – 1.0 μA VUVLO Input UVLO Threshold – – 2.4 2.7 V VHYS UVLO Hysteresis – – 0.1 – V – Maximum Duty Cycle – 100 – – % RDSCH Output Discharge Switch On Resistance – – 2.1 – KΩ TOTP Over Temperature Protection – – +160 – °C TOTH OTP Hysteresis – – +15 – °C tSS Soft-start Time – – 2 – ms
Document number: DS37389 Rev. 2 - 2 5 of 11 www.diodes.com June 2016 © Diodes Incorporated AP3401 NEW PRODUCT Performance Characteristics (@TA = +25° C, VIN = 5V, VOUT = 1.8V, unless otherwise specified.) Efficiency vs. Load Current Feedback Reference Voltage vs. Temperature PFET Drain-Source On-State Resistance vs. Temperature NFET Drain-Source On-State Resistance vs. Temperature Quiescent Current vs. Temperature Oscillation Frequency vs. Temperature 10 100 1000 100 Efficiency(%) Output Current(mA) VIN=5V, VOUT=1.0V VIN=5V, VOUT=1.8V VIN=5V, VOUT=3.3V -60 -40 -20 0 20 40 60 80 100 120 140 0.570 0.575 0.580 0.585 0.590 0.595 0.600 0.605 0.610 0.615 0.620 0.625 0.630 Feedback Reference Voltage（V） Temperature（oC） -60 -40 -20 0 20 40 60 80 100 120 140 100 120 140 160 180 200 220 240 260 PFET Rdson （mohm） Temperature（oC） -60 -40 -20 0 20 40 60 80 100 120 140 100 120 140 160 180 200 220 240 NFETRdson（mohm） Temperatrue（oC） -60 -40 -20 0 20 40 60 80 100 120 140 100 Quiescent Current（uA） Temperatrue（oC） -60 -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 1.8 Oscillation Frequency（MHz） Temperature（oC）
Document number: DS37389 Rev. 2 - 2 6 of 11 www.diodes.com June 2016 © Diodes Incorporated AP3401 NEW PRODUCT Performance Characteristics (@TA = +25° C, VIN = 5V, VOUT = 1.8V, unless otherwise specified.) Enable Turn on Characteristic (IOUT=1A) Enable Turn off Characteristic (IOUT=1A) Short Current Protection (IOUT=1A) SCP Recovery (IOUT=1A) Load Transient (IOUT=0.1A to 1A) Load Transient (IOUT=0.5A to 1A) EN (5V/div) VOUT (1V/div) IL (1A/div) SW (5V/div) EN (5V/div VOUT (1V/div) IL (1A/div) SW (5V/div) VOUT (1V/div) IL (1A/div) SW (5V/div) VOUT (1V/div) IL (1A/div) SW (5V/div) VOUT_AC (100mV/div IO (1A/div) VOUT_AC (100mV/div) IO (1A/div) Time (2ms/div) Time (2ms /div) Time (2ms/div) Time (2ms /div) Time (2ms/div) Time (2ms /div)
Document number: DS37389 Rev. 2 - 2 7 of 11 www.diodes.com June 2016 © Diodes Incorporated AP3401 NEW PRODUCT
Application Information
Typical application circuit is shown in the application circuit and for the circuit parameters setting please refers to the following descriptions. Under Voltage Lockout (UVLO) Circuit When the VIN 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 VIN is rising higher than UVLO released voltage, the IC will restart the operation. Short Circuit Protection and Recovery When the AP3401 output node is shorted to GND that VFB drops under 0.42V, the AP3401 will enter hiccup mode to protect itself. If short circuit is removed, and VFB rises over 0.42V, the AP3401 recovers to normal operation again. If the AP3401 reaches OCP threshold while short circuit, the AP3401 will enter cycle by cycle current limit mode until the current under OCP threshold. Power Good The PG pin output is an open drain MOSFET. The output is pulled low when the FB voltage enters the fault condition by falling below 80%or rising above 120% of the nominal internal reference voltage. When the FB voltage rises to the good condition above 90% or falls below 110% of the internal voltage reference PG output MOSET is turned off. It is recommended using a pull-up to VIN. Over Temperature Protection The internal thermal temperature protection circuitry is provided to protect th e integrated 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 AP3401 will restart automatically under the control of soft start circuit when the junction temperature decreases to +145°C. Input Over Voltage Protection When input voltage of AP3401 is near 6.25V, the IC will enter Input -Over-Voltage-Protection. It would be shut down and there will be no output voltage in this state. As the input voltage goes down below 6V, it will leave input OVP and recover the output voltage. Setting the Output Voltage The output voltage can be adjusted from 1 to 5V 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 current in the error amplifier. R1 can be determined by the following equation. Meanwhile, the input capacitor should close to IC for preventing unexpected influences. Figure 1. Feedback Divider Network Table 1. Resistor Selection for Common Output
Document number: DS37389 Rev. 2 - 2 8 of 11 www.diodes.com June 2016 © Diodes Incorporated AP3401 NEW PRODUCT
Ordering Information
AP3401 X X – X PackingPackageProduct Name TR : Tape & Reel G1 : Green RoHS/Green KT : TSOT26 DN : U-DFN2020-6 Package Temperature Range Part Number Marking ID Packing TSOT26 -40 to +85°C AP3401KTTR-G1 L2G 3000/Tape & Reel U-DFN2020-6 (Type J) AP3401DNTR-G1 CP 3000/Tape & Reel Marking Information (1) TSOT26 (Top View) (2) U-DFN2020-6 (Type J) (Top View) First Line: Logo and Marking ID First Line: Logo and Marking ID
Document number: DS37389 Rev. 2 - 2 9 of 11 www.diodes.com June 2016 © Diodes Incorporated AP3401 NEW PRODUCT Package Outline Dimensions (All dimensions in mm.) (1) Package Type: TSOT26 D E1/2 E E/2 e A Seating Plane0 L Gauge Plane 01(4x) 01(4x) c b Seating Plane (2) Package Type: U-DFN2020-6 (Type J) D E e b L A A1 D2/2 E2/2 R0.100 Seating Plane U-DFN2020-6 (Type J) Dim Min Max Typ A 0.50 0.60 -- A1 0.00 0.05 0.03 A3 -- -- 0.203 b 0.20 0.30 0.25 D 1.95 2.075 2.00 D2 1.45 1.65 1.55 E 1.95 2.075 2.00 E2 0.76 0.96 0.86 e 0.65 BSC L 0.30 0.40 0.35 All Dimensions in mm TSOT26 Dim Min Max Typ A 1.00 A1 0.010 0.100 A2 0.840 0.900 D 2.800 3.000 2.900 E 2.800 BSC E1 1.500 1.700 1.600 b 0.300 0.450 c 0.120 0.200 e 0.950 BSC e1 1.900 BSC L 0.30 0.50 L2 0.250 BSC θ 0° 8° 4° θ1 4° 12° All Dimensions in mm
Document number: DS37389 Rev. 2 - 2 10 of 11 www.diodes.com June 2016 © Diodes Incorporated AP3401 NEW PRODUCT Suggested Pad Layout (1) Package Type: TSOT26 C X Y (2) Package Type: U-DFN2020-6 (Type J) Y2 Y1 C X Y G Dimensions Value (in mm) C 0.650 G 0.120 X 0.350 X1 1.650 Y 0.550 Y1 0.960 Y2 2.300 Dimensions Value (in mm) C 0.950 X 0.700 Y 1.000 Y1 3.199
Document number: DS37389 Rev. 2 - 2 11 of 11 www.diodes.com June 2016 © Diodes Incorporated AP3401 NEW PRODUCT 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 MERCHANTA BILITY 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 un der 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 ou t of, direc tly 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 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 accordan ce 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 ind emnify 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