Datasheet 2.9V to 5.5V Input, 5A Integrated MOSFET Single Synchronous Buck DC/DC Converter BD91364BMUU General Description Key Specifications ROHMs high efficiency switching regulator, Input Voltage Range: 2.9V to 5.5V BD91364BMUU, is a step-down converter designed to Output Voltage Range: 0.8V to PVCC0.8V produce a low voltage output of 0.8V to 3.3V from a 2.9V Output Current: 5.0A(Max) to 5.5V power supply line. It offers high efficiency in all Switching Frequency: 1.7MHz(Typ) load ranges by automatic PFM/PWM adjustment. It High Side FET ON Resistance: 27m(Typ) employs an On-time control system to provide faster Low Side FET ON Resistance: 27m(Typ) transient response to sudden change in load. Standby Current: 0A (Typ) Operating Temperature Range: -40C to +105C Features Fast transient response with On-time control Package W(Typ) x D(Typ) x H(Max) system. VQFN20U4040M 4.00mm x 4.00mm x 0.50mm High efficiency for all load range with synchronous rectifier (Nch/Nch FET) and adaptive PFM/PWM system. Adjustable Soft-start function. Thermal and UVLO protection. Short-circuit current protection with timer latch. Shutdown function. Applications Power supply for LSI including SoC, DSP, Micro computer and ASIC Laptop PC / Tablet PC / Server LCD TV, Storage Devices (HDD / SSD) Printer VQFN20U4040M Entertainment device Secondary power supply Typical Application Circuit VIN PGD PVCC PGD BST AVCC CIN 22F CBST EN L BD91364BMUU VOUT SW 0.47H SS FB CO 22F CSS GND RS Figure 1. Typical Application Circuit Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays . www.rohm.com TSZ02201-0J2J0AJ00930-1-2 2015 ROHM Co., Ltd. All rights reserved. 1/27 TSZ22111 14 001 27.Jul.2015 Rev.001DatasheetDatasheet BD91364BMUU Pin Configuration(TOP VIEW) 10 9 8 7 6 EN 11 5 SW 12 PGD 4 SW 13 RES 3 SW 14 SS 2 SW 15 FB 1 SW 16 18 17 19 20 Figure 2. Pin Configuration Pin Description Pin No. Pin Name Function Pin No. Pin Name Function 1 SW Switch pin 11 EN Enable pin (High active) 2 SW Switch pin 12 PGD Power good open drain pin 3 Switch pin SW 13 RES Reserve pin, Connect to ground 4 SW Switch pin 14 SS Soft start capacitor connection pin 5 Switch pin SW 15 FB Output voltage detect pin 6 PVCC High Side FET source pin 16 RS Remote sense ground pin 7 PVCC 17 AGND High Side FET source pin Ground 8 PVCC High Side FET source pin 18 PGND Low Side FET source pin 9 BST Bootstrapped voltage input pin 19 PGND Low Side FET source pin 10 AVCC Power supply input pin 20 PGND Low Side FET source pin Block Diagram Figure 3. Block Diagram www.rohm.com TSZ02201-0J2J0AJ00930-1-2 2015 ROHM Co., Ltd. All rights reserved. 2/27 TSZ22111 15 001 27.Jul.2015 Rev.001 AVCC RS BST AGND PVCC PGND PVCC PGND PVCC PGND