Analog Devices UG-189 Manuals

Evaluation Board User Guide UG-189 One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com Evaluation Board for the 2 A/3 A, 20 V, Nonsynchronous Step-Down Regulators PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 12 FEATURES Wide input voltage range: 3.0 V to 20 V Maximum load current 2 A for ADP2302 3 A for ADP2303 ±1.5% output accuracy over temperature Output voltage down to 0.8 V 700 kHz switching frequency Current-mode control architecture Automatic PFM/PWM mode Precision enable pin with hysteresis Integrated high-side MOSFET Integrated bootstrap diode Internal compensation and soft start Power-good output Undervoltage lockout (UVLO) Overcurrent protection (OCP) Thermal shutdown (TSD) 8-lead SOIC package with exposed paddle GENERAL DESCRIPTION The ADP2302/ADP2303 are 2 A/3 A, 20 V, nonsynchronous step-down, dc-to-dc regulators with an integrated power MOSFET in a SOIC package with an exposed paddle. The ADP2302/ ADP2303 evaluation boards are complete buck regulator solutions that allow users to evaluate the performance of the regulators. The ADP2302/ADP2303 integrated soft-start circuitry prevents inrush current at power-up. The power-good output indicates that the output voltage is regulated within tolerance, and it can be used to sequence devices that have an enable input. The precision enable feature allows the part to be easily sequenced from external supplies. Other key features include undervoltage lockout (UVLO), output overvoltage protection (OVP), thermal shutdown (TSD), and overcurrent protection (OCP). Full details on the ADP2302/ADP2303 are provided in the ADP2302/ADP2303 data sheet available from Analog Devices, Inc., which should be consulted in conjunction with this user guide. ADP2302/ADP2303 EVALUATION BOARD 09315-001 Figure 1. ADP2302/ADP2303 Evaluation Board