AP3591FNTR-G1

A Product Line of Diodes Incorporated PART OBSOLETE NO ALTERNATE PART AP3591 SINGLE PHASE SYNCHRONOUS BUCK CONTROLLER Pin Assignments (Top View) Pin 1 Mark The constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and features small external component count and fast transient response. TON BOOT The AP3591 is a synchronous adaptive on-time buck controller providing high efficiency, excellent transient response and high DC output accuracy for low voltage regulation in notebook application. EN/DEM 1 14 2 13 UGATE VOUT 3 4 FB 5 PGOOD Features PHASE 11 CS 10 VDDP 6 9 LGATE 7 8 Applications Fixed Frequency Constant On-time Control; Resistor Programmable Frequency Adjustable from 100kHz to 700kHz • Notebook Computer, AIO PC • Low-voltage Distribute Power • Good Stability Independent of the Output Capacitor ESR • I/O Supplies • Quick Load Step Response • Input Voltage Range: 4.5V to 26V • Output Voltage Range: 0.75V to 5.5V • CCM/DEM Mode Selection • Integrated Bootstrap Diode • 12 U-QFN3535-14 The AP3591 is available in U-QFN3535-14 package. • EP PGND The operation mode is selectable by EN voltage. A Diode Emulation Mode (DEM) is activated for increasing efficiency at light loads, while PWM mode is activated only for low noise operation. The AP3591 also integrates internal Soft-start, UVLO, OVP, OTP, and programmable OCP to protect the circuit. A Power Good signal is employed to monitor the output voltage. VDD GND OBSOLETE – PART DISCONTINUED Description Resistor Programmable Current Limit by Low-side RDS_ON Sense • Integrated Negative Over Current Limit • Integrated OVP/UVP and Over Thermal Shutdown Function • Power Good Indicator • Internal Soft-start • Integrate Output Discharge (Soft-stop) • Safe Start-up into Pre-biased Loads • 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) & 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