Datasheet 3.0V to 20V, 6A 1ch Synchronous Buck Converter Integrated FET BD95500MUV General Description BD95500MUV is a switching regulator with current capability of 6A and the ability to achieve low output voltages of 0.7V to 5.0V from a wide input voltage range of 3V to 20V. Built-in NMOS power transistors and implementation of Simple Light Load TM) TM Mode technology (SLLM make this device highly-efficient. SLLM improves efficiency when the device is used is used 3 TM with light load, providing high efficiency over a wider range of loads. The device also uses H Reg , a ROHM proprietary control method, to achieve ultra-fast transient response against load changes. BD95500MUV is especially designed for various applications and is integrated with protection features such as soft-start, variable frequency, short circuit protection with timer latch, over voltage protection, and power good function. Features Key Specifications 3 TM H Reg DC/DC Converter Controller Input Voltage Range: 3.0V to 20V TM Selectable Simple Light Load Mode (SLLM ), and Output Voltage Range: 0.7V to 5.0V Forced Continuous Mode Output Current: 6.0A(Max) Built-in Thermal Shut Down (TSD), Under Voltage High Side ON Resistance: 50m(Typ) Lockout (UVLO), Adjustable Over-Current Low Side ON Resistance: 50m(Typ) Protection (OCP), Over Voltage Protection (OVP), Standby Current: 0A (Typ) Short Circuit Protection (SCP) Operating Temperature Range: -10C to +100C Soft Start Function to Minimize Rush Current during Startup Package W (Typ) x D (Typ) x H (Max) Adjustable Switching Frequency (f=200KHz to600KHz) Built-in Output Discharge Function Tracking Function Integrated Boot Strap Diode Power Good Function Applications Mobile PC, Desktop PC, LCD-TV, Digital Components, etc. VQFN040V6060 Typical Application Circuit 6.00mm x 6.00mm x 1.00mm SW L1 VOUT (3.3V/6A) + R14 C10 GND VOUT VIN (5V) 31 20 VIN PGND Q1 R12 32 19 VIN PGND C15 IPULSE GND VIN 33 18 C11 PGND VIN 34 17 PGND C16 VIN BD95500MUV 35 16 VIN PGND VQFN040V6060 R15 36 15 VIN PGND C6 14 37 GND VDD VDD VIN S EN C12 13 VDD 38 IS+ BOOT Is+ C13 12 39 ISIs- - EN 40 11 VOUT MOD E VDD MODE SS SW2 VDD(5V) 1 R18 5 3 6 VREG REF R6 R4 ILIM R8 R9 PGOOD Figure 1. Typical Application Circuit Product structure Silicon monolithic integrated circuit This product has no designed protection against radioactive rays . www.rohm.com TSZ02201-0A1A0A900050-1-2 2014 ROHM Co., Ltd. All rights reserved. 1/29 TSZ22111 14 001 27.Nov.2014 Rev.001 1 PGND PGOOD 30 2 NC SW 29 3 CE SW 28 4 SW ILIM 27 R3 R2 5 SW VCC C2 26 C1 6 GND SW 25 C3 7 SW VREG 24 8 SW FS 23 R5 9 SS SW 22 C4 10 REF PGND 21 D1 R7 C5 R19 R20 R10 C14 C8 R19 R20 C9 C14 R13 R11 C7 BD95500MUV Pin Configuration TOP VIEW PGND SW SW SW SW SW SW SW SW PGND 30 29 28 27 26 25 24 23 22 21 VIN PGND 31 20 VIN PGND 32 19 VIN PGND 33 18 PGND VIN 34 17 PGND VIN 35 16 PGND VIN 15 36 VDD 14 VINS 37 IS+ 13 BOOT 38 - IS 12 EN 39 VOUT 11 MODE 40 1 2 3 4 5 6 7 8 9 10 PGOOD N . C. CE ILIM VCC GND VREG FS SS/ REF TRACK Note: Connect the bottom side (FIN) to the ground terminal Figure 2. Pin Configuration Pin Description (Function Table) Pin No. Pin Name Pin Function 1 PGOOD Power good output (10% window) No connection 2 N.C. Ceramic capacitor reactive pin 3 CE 4 ILIM Current limit setting Power supply input (control block) 5 VCC 6 GND Sense ground IC reference voltage (2.5V/500A) 7 VREG Switching frequency adjustment (30k to 100k) 8 FS 9 SS/TRACK Soft start setting (w/ capacitor)/Tracking voltage input VOUT setting 10 REF 11 VOUT Output voltage sense Current sense (-) 12 IS- Current sense (+) 13 IS+ 14 VDD FET driver power supply (5V input) Power ground 15 to 21 PGND 22 to 29 SW High side FET source Power ground 30 PGND Battery voltage input (3.3V to 20V input) 31 to 36 VIN 37 VINS Battery voltage sense HG driver power supply 38 BOOT 39 EN Enable input (IC is ON when high) Control mode selection Low: Continuous Mode 40 MODE TM High: SLLM Substrate connection bottom FIN www.rohm.com TSZ02201-0A1A0A900050-1-2 2014 ROHM Co., Ltd. All rights reserved. 2/29 TSZ22111 15 001 27.Nov.2014 Rev.001