DatasheetsPDF.com

AP3441L Dataheets PDF



Part Number AP3441L
Manufacturers Diodes
Logo Diodes
Description 3A STEP-DOWN DC-DC BUCK CONVERTER
Datasheet AP3441L DatasheetAP3441L Datasheet (PDF)

Description The AP3441 and AP3441L are 3A step-down DC-DC converters. At heavy load, the constant-frequency PWM control performs excellent stability and transient response. No external compensation components are required. AP3441/L 1MHZ, 3A STEP-DOWN DC-DC BUCK CONVERTER Pin Assignments (Top View) Pin 1 Mark The AP3441/L supports a range of input voltages from 2.7V to 5.5V allowing the use of a single Li+/Li-polymer cell, multiple Alkaline/NiMH cell, and other standard power sources. The outpu.

  AP3441L   AP3441L


Document
Description The AP3441 and AP3441L are 3A step-down DC-DC converters. At heavy load, the constant-frequency PWM control performs excellent stability and transient response. No external compensation components are required. AP3441/L 1MHZ, 3A STEP-DOWN DC-DC BUCK CONVERTER Pin Assignments (Top View) Pin 1 Mark The AP3441/L supports a range of input voltages from 2.7V to 5.5V allowing the use of a single Li+/Li-polymer cell, multiple Alkaline/NiMH cell, and other standard power sources. The output voltage is adjustable from 0.6V to the input voltage. The AP3441/L employs internal power switch and synchronous rectifier to minimize external part count and realize high efficiency. During shutdown, the input is disconnected from the output and the shutdown current is less than 1μA. Other key features include over-temperature and short circuit protection, and under-voltage lockout to prevent deep battery discharge. The AP3441/L delivers 3A maximum output current while consuming only 55μA of no-load quiescent current. Ultra-low RDS(ON) integrated MOSFETs and 100% duty cycle operation make the AP3441/L an ideal choice for high output voltage, high current applications which require a low dropout threshold. Pulse skip mode to maintain high efficiency at light-load conditions. FB 1 PG 2 VIN 3 PGND 4 8 SGND 7 EN 6 LX 5 NC U-DFN2020-8 (Type E) The AP3441/L is available in U-DFN2020-8 (Type E) package. Features  Input Voltage: 2.7V to 5.5V  Output Voltage: 0.6V to VIN  0.6V Reference Voltage with ±1.5% Precision  55µA (Typical) No Load Quiescent Current  Shutdown Current: <1µA  100% Duty Cycle Operation  1MHz Switching Frequency  No External Compensation Required  Short Circuit Protection 441L: Latch Off Protection AP3441: Hiccup Mode Protection  Over Voltage Protection AP3441L: Latch Off Protection AP3441: Non Latch Off Protection  Thermal Shutdown  U-DFN2020-8 (Type E) Package  Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)  Halogen and Antimony Free. “Green” Device (Note 3) 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) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ 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. AP3441/L Document number: DS39754 Rev. 3 - 2 1 of 13 www.diodes.com September 2019 © Diodes Incorporated Typical Applications Circuit AP3441/L VIN=2.7V to 5.5V VIN CIN 22mF OFF ON EN L1 2.2mH LX C1 22pF FB PG PGND SGND AP3441/L VOUT=1.8V R1 200kΩ COUT 22mFx2 R2 100kΩ Pin Descriptions Pin Number 1 2 3 4 5 6 7 8 EP Pin Name FB PG VIN PGND NC LX EN SGND Exposed Pad Function Feedback voltage to internal error amplifier, the threshold voltage is 0.6V. 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. Bias supply. Chip main power supply pin Power ground pin No connection The drains of the internal main and synchronous power MOSFET. Enable control input. Force this pin voltage above 1.5V enables the chip, and below 0.4V shuts down the device. Signal ground pin Exposed metal pad on the underside of the package without any electrical connection to internal circuit. It is recommended to connect this pad to the PC board ground plane in order to improve heat dissipation. AP3441/L Document number: DS39754 Rev. 3 - 2 2 of 13 www.diodes.com September 2019 © Diodes Incorporated Functional Block Diagram EN 7 Slope Compensation Shutdown Comparator PG 2 Bias Generator Soft Start Oscillator OCP Comparator UVLO Current Sensing PWM Comparator Control Logic Buffer & Dead Time Control Logic 1 FB Bandgap Reference Error Amplifier SCP OVP AP3441L only Latch Off Circuit Reverse Inductor Current Comparator VIN OVP Comparator AP3441/L VIN 3 6 LX 4 PGND 8 SGND Functional Block Diagram of AP3441/L AP3441/L Document number: DS39754 Rev. 3 - 2 3 of 13 www.diodes.com September 2019 © Diodes Incorporated AP3441/L Absolute Maximum Ratings (Note 4) Symbol Parameter Rating Unit VIN Input Voltage VEN EN Pin Voltage VFB FB Pin Voltage VLX LX Pin Voltage VLX LX Pin Voltage VFB Feedback Pin Voltage PD Power Dissipation (On PCB, TA = +25°C) -0.3 to 6 V -0.3 to VIN+0.3 V -0.3 to VIN+0.3 V -0.3 to VIN+0.3 V -3 to VIN +3 for <20ns V -0.3 to VIN+0.3 V 1.4 W θJA Thermal Resistance (Junction to Ambient) 70 °C/W θJC Thermal Resistance (Junction to Case, Simulation) 8.2 °C/W Note: TJ Operating Junction Temperature +150 °C TSTG Storage Temperature -55 to +150 °C VHBM ESD (H.


AP3441 AP3441L AP3445


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)