DATA SHEET www.onsemi.com High-Efficiency Step-Down DC-DC Converter 1 A WDFN6 CASE 511CP FAN2001/FAN2002 MARKING DIAGRAM Description Designed for use in batterypowered applications, the FAN2001/ Y&Z&2&K FAN2002 is a high efficiency, lownoise synchronous PWM current 200x mode and Pulse Skip (Power Save) mode dcdc converter. It can C provide up to 1 A of output current over a wide input range from 2.5 V to 5.5 V. The output voltage can be externally adjusted over a wide range of 0.8 V to 5.5 V by means of an external voltage divider. Y = onsemi Logo At moderate and light loads, pulse skipping modulation is used. &Z = Assembly Plant Code Dynamic voltage positioning is applied, and the output voltage is &2 = 2Digit Data Code shifted 0.8% above nominal value for increased headroom during load &K = Lot Run Traceability Code 200xC = Specific Device Code transients. At higher loads the system automatically switches over to x = 1 or 2 current mode PWM control, operating at 1.3 MHz. A current mode control loop with fast transient response ensures excellent line and load regulation. To achieve high efficiency and ensure long battery ORDERING INFORMATION life, the quiescent current is reduced to 25 A in Power Save mode, and the supply current drops below 1 A in shutdown mode. The Device Package Shipping FAN2001/FAN2002 is available in a 3x3 mm 6lead MLP package. FAN2001MPX WDFN6 3000 / (PbFree, Tape & Reel Features FAN2002MPX Halide Free) 96% Efficiency, Synchronous Operation For information on tape and reel specifications, Adjustable Output Voltage Options from 0.8 V to V IN including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification 2.5 V to 5.5 V Input Voltage Range Brochure, BRD8011/D. Up to 1 A Output Current Fixed Frequency 1.3 MHz PWM Operation High Efficiency Power Save Mode 100% Duty Cycle Low Dropout Operation Soft Start Output OverVoltage Protection Dynamic Output Voltage Positioning 25 A Quiescent Current Thermal Shutdown and Short Circuit Protection PbFree and Halide Free Applications Pocket PCs, PDAs Cell Phones BatteryPowered Portable Devices Digital Cameras Hard Disk Drives SetTopBoxes PointofLoad Power Notebook Computers Communications Equipment Semiconductor Components Industries, LLC, 2005 1 Publication Order Number: November, 2021 Rev. 2 FAN2002/DFAN2001/FAN2002 TYPICAL APPLICATION 3.3 H V FB IN V EN OUT 1 6 1 6 1.2 V (1 A) SW R2 C IN PGND P1 P1 V R1 PGND IN 10 k 2 5 C 2 5 NC OUT R1 5 k (AGND) (AGND) 5k 10 F 2 x 10 F L1 EN PV FB V SW IN OUT 3 4 3 4 1.2 V (1 A) 3.3 H 10 F R2 10 k 2 x 10 F FAN2002 FAN2001 Figure 1. Typical Application PIN ASSIGNMENT AND DESCRIPTION V SW FB EN 1 6 1 6 IN P1 P1 2 2 PGND 5 NC PGND 5 V IN (AGND) (AGND) EN 3 4 FB SW 3 4 PV IN FAN2002 FAN2001 Figure 2. Pin Assignment (Top View) PIN DESCRIPTION Pin No. Pin Name Description FAN2001 P1 AGND Analog Ground. P1 must be soldered to the PCB ground. 1 V Supply Voltage Input. IN 2 PGND Power Ground. This pin is connected to the internal MOSFET switches. This pin must be externally connected to AGND. 3 EN Enable Input. Logic high enables the chip and logic low disables the chip, reducing the supply current to less than 1 A. Do not float this pin. 4 FB Feedback Input. Adjustable voltage option, connect this pin to the resistor divider. 5 NC No Connection Pin. 6 SW Switching Node. This pin is connected to the internal MOSFET switches. FAN2002 P1 AGND Analog Ground. P1 must be soldered to the PCB ground. 1 FB Feedback Input. Adjustable voltage option, connect this pin to the resistor divider. 2 PGND Power Ground. This pin is connected to the internal MOSFET switches. This pin must be externally connected to AGND. 3 SW Switching Node. This pin is connected to the internal MOSFET switches. 4 PV Supply Voltage Input. This pin is connected to the internal MOSFET switches. IN 5 V Supply Voltage Input. IN 6 EN Enable Input. Logic high enables the chip and logic low disables the chip, reducing the supply current to less than 1 A. Do not float this pin. www.onsemi.com 2