AP3429 DIODES | Alldatasheet
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Output Current: Up to 2A Output Voltage: 0.6V to VIN Input Voltage: 2.7V to 5.5V Shutdown Current: <1μA 100% Duty Cycle Operation 1MHz Switching Frequency Internal Soft Start No External Compensation Required Short Circuit Protection AP3429: Latch Off Protection AP3429A: Hiccup Mode Protection Over Voltage Protection AP3429: Latch Off Protection AP3429A: No Latch Off Protection Thermal Shutdown TSOT25 package Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) 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.
Document number: DS36561 Rev. 3 - 2 2 of 11 www.diodes.com August 2015 © Diodes Incorporated AP3429/A NEW PRODUCT Typical Applications Circuit VIN EN LX FB L1 2.2mHCIN 22mF VIN=2.7V to 5.5V GND COUT 22mFx2 VOUT=1.8V ON OFF AP3429/A C1 22pF 300k 150k Pin Descriptions Pin Number Pin Name Function 1 EN Enable control input. Force this pin voltage above 1.5V enables the chip, and below 0.4V shuts down the device. 2 GND Ground pin. 3 LX The drains of the internal main and synchronous power MOSFETs. 4 VIN Bias supply. Chip main power supply pin. 5 FB Feedback voltage to internal error amplifier. The threshold voltage is 0.6V.
Document number: DS36561 Rev. 3 - 2 3 of 11 www.diodes.com August 2015 © Diodes Incorporated AP3429/A NEW PRODUCT Functional Block Diagram 1M OSC SLOPE COMP FREQ SHIFT 0.6V REF S R Q QEA SWITCHING LOGIC AND BLOCKING CIRCUIT ANTI- SHOOT THRU PWM COMP IAMPFB EN VIN LX GND VIN SHUTDOWN ____ OSC OVP +120% REF Function Block Diagram of AP3429 1M OSC SLOPE COMP FREQ SHIFT 0.6V REF S R Q QEA SWITCHING LOGIC AND BLOCKING CIRCUIT ANTI- SHOOT THRU PWM COMP IAMPFB EN VIN LX GND VIN SHUTDOWN ____ OSC Function Block Diagram of AP3429A
Document number: DS36561 Rev. 3 - 2 4 of 11 www.diodes.com August 2015 © Diodes Incorporated AP3429/A NEW PRODUCT 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) 0.4 W θJA Thermal Resistance (Junction to Ambient) 220 °C/W θJC Thermal Resistance (Junction to Case, Simulation) 130 º C/W TJ Operating Junction Temperature +150 °C TSTG Storage Temperature -55 to +150 °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” may cause permanent damage to the device. These are stres s ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended O perating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Recommended Operating Conditions Symbol Parameter Min Max Unit VIN Input Voltage Range 2.7 5.5 V TA Operating Ambient Temperature -40 +85 °C TJ Junction Temperature Range -40 +125 °C
Document number: DS36561 Rev. 3 - 2 5 of 11 www.diodes.com August 2015 © Diodes Incorporated AP3429/A NEW PRODUCT Electrical Characteristics (@VIN = 5V, V OUT = 1.8V, L = 2.2µH, CIN = 22µF, COUT = 22µF×2, T A = +25° C, unless othe rwise specified.) Symbol Parameters Conditions Min Typ Max Unit VIN Input Voltage Range – 2.7 – 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 – 90 – μA ISD Shutdown Current VEN = 0V – 0.1 1 μA ILIM Peak Inductor Current – 3 – – A VSCP Short Circuit Protection Latch Off Threshold – – 0.3 – V fOSC Oscillator Frequency – – 1 – MHz RDS(ON) Drain to Source On-state Resistance ILX = 100mA, high side – 110 – mΩ ILX = 100mA, low side – 80 – 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 – – 0.2 – V – Maximum Duty Cycle – 100 – – % RDSCH Output Discharge Switch On Resistance – – 50 – Ω TOTP Over Temperature Protection – – +160 – °C TOTH OTP Hysteresis – – +30 – °C VIOVP VIN Over Voltage Protection – – 6.25 – V VIHSY IOVP Hysteresis – – 0.25 – V tSS Soft-start Time – – 1.8 – ms
Document number: DS36561 Rev. 3 - 2 6 of 11 www.diodes.com August 2015 © Diodes Incorporated AP3429/A 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 Inductor Current Limit vs. Temperature Oscillation Frequency vs. Temperature 1 10 100 1000 100 Efficiency (%) IOUT (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 0.580 0.585 0.590 0.595 0.600 0.605 0.610 0.615 0.620 Feedback Reference Voltage (V) Temperature ( o -60 -40 -20 0 20 40 60 80 100 120 140 100 110 120 130 140 150 160 170 180 190 200 PFET RDS(ON)(m) Temperture ( o -60 -40 -20 0 20 40 60 80 100 120 140 100 110 120 NFET RDS(ON) (m) Temperture ( o -60 -40 -20 0 20 40 60 80 100 120 140 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 Inductor Current Limit (A) Temperature ( o -60 -40 -20 0 20 40 60 80 100 120 140 0.70 0.75 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 Oscillation Frequency (MHz) Temperature ( o
Document number: DS36561 Rev. 3 - 2 7 of 11 www.diodes.com August 2015 © Diodes Incorporated AP3429/A NEW PRODUCT Performance Characteristics (Cont. @TA = +25° C, VIN = 5V, VOUT = 1.8V, unless otherwise specified.) Enable Turn on Characteristic (IOUT=2A) Enable Turn off Characteristic (IOUT=2A) Time (5ms/div) Time (5ms/div) Short Current Protection (IOUT=2A) SCP Recovery (IOUT=2A) Time (50ms/div) Time (50ms/div) Load Transient (IOUT=0.1A to 2A) Load Transient (IOUT=1A to 2A) Time (100µs/div) Time (100µs/div) VEN (2V/div) VOUT (1V/div) IL (2A/div) VSW (5V/div) VEN (2V/div) VOUT (1V/div) IL (2A/div) VSW (5V/div) VOUT (1V/div) IL (2A/div) VSW (5V/div) VOUT (1V/div) IL (2A/div) VSW (5V/div) VOUT_AC (100mV/div) IOUT (1A/div) VOUT_AC (100mV/div) IOUT (1A/div)
Document number: DS36561 Rev. 3 - 2 8 of 11 www.diodes.com August 2015 © Diodes Incorporated AP3429/A 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 The AP3429/A provides an under voltage lockout circuit to prevent it from undefined status . When the VIN drops lower than the UVLO detector threshold, the UVLO circuit starts to operate, VREF stops, and high-side and low-side built-in switch transistors turn “OFF”. As a result, VOUT 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. Over Current Protection The AP3429/A has internal over current protection function to protect from catastrophic failures. The IC can monitor the PMOS current, if the peak current is higher than the current limit threshold, OCP function will be triggered and enter cycle by cycle current limit mode. If VFB drops under 0.3V for example, output node shorted to GND, AP3429 will enter latch off mode. IC will turn off both power switches. It will remain latch off state until the VIN or Enable recycled to release it. AP3429A will enter hiccup mode to protect itself, if short circuit is removed, and VFB rises over 0.3V, the AP3429A recovers to normal operation again. Over Voltage Protection The AP3429 has internal output OVP circuits. When VOUT is exceeds 120% of the regulation level for more than 40µs, the power switching will be turned off. IC enter latch off mode and will restart until VIN or Enable voltage recycled. Over Temperature Protection The internal thermal temperature protection circuitry of AP3429/A is provided to protect the 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 AP3429/A will restart automatically under the control of soft start circuit when the junction temperature decreases to +130°C. Input Over Voltage Protection When input voltage of AP3429/A 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.
Document number: DS36561 Rev. 3 - 2 9 of 11 www.diodes.com August 2015 © Diodes Incorporated AP3429/A NEW PRODUCT
Ordering Information
AP3429X XX XX – XX PackingPackage TR : Tape & ReelA : AP3429A Blank : AP3429 Product Name Product Version KT : TSOT25 G1 : Green RoHS/Green Package Temperature Range Part Number Marking ID Packing TSOT25 -40 to +85°C AP3429AKTTR-G1 L2E 3000/Tape & Reel AP3429KTTR-G1 L2F 3000/Tape & Reel Marking Information AP3429 (Top View) AP3429A (Top View) First Line: Logo and Marking ID First Line: Logo and Marking ID
Document number: DS36561 Rev. 3 - 2 10 of 11 www.diodes.com August 2015 © Diodes Incorporated AP3429/A NEW PRODUCT Package Outline Dimensions Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version. (1) Package Type: TSOT25 D E1/2 E E/2 e A Seating Plane0 L Gauge Plane 01(4x) 01(4x) c b Seating Plane Suggested Pad Layout Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version. (1) Package Type: TSOT25 C X Y Dimensions Value (in mm) C 0.950 X 0.700 Y 1.000 Y1 3.199 TSOT25 Dim Min Max Typ A - 1.00 - A1 0.01 0.10 - A2 0.84 0.90 - b 0.30 0.45 - c 0.12 0.20 - D - - 2.90 E - - 2.80 E1 - - 1.60 e 0.95 BSC e1 1.90 BSC L 0.30 0.50 L2 0.25 BSC θ 0° 8° 4° θ1 4° 12° - All Dimensions in mm
Document number: DS36561 Rev. 3 - 2 11 of 11 www.diodes.com August 2015 © Diodes Incorporated AP3429/A NEW PRODUCT IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARR ANTY 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 a rising 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 describe d 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 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 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 devices or syste ms, 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 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 © 2015, Diodes Incorporated www.diodes.com