XR79110/15/20 22V, 10/15/20A Synchronous Step Down COT Power Modules - PowerPoint PPT Presentation

XR79110/15/20 22V, 10/15/20A Synchronous Step Down COT Power Modules Key Features Benefits – 10/15/20Amp Power Modules – Industry’s smallest 20A power module Efficiency > 92% • Integrated MOSFETs and inductors • 12x14x4mm • Efficiency >92% – Controller, drivers, bootstrap diode/capacitor, MOSFETs, inductors, – Wide 5.0V to 22V input voltage range CIN, COUT integrated in one package • 3V to 22V PVIN with 5V bias • 4.5V to 5.5V single supply operation – Exceptional thermal performance • >0.6V adjustable output voltage – Excellent line and load regulation – Constant On-Time Control – High efficiency in a small footprint • Emulated valley current mode (patented) – Short design time • Programmable 400kHz-800kHz switching frequency • Selectable CCM or CCM/DCM modes • Stable with ceramic output caps Availability & Tools Key Competitive Advantages • No compensation required In Production – Programmable current limit with thermal compensation Competitive Modules – XR79110 (10A) – Precision enable and power-good flag – Small footprint • 10x10mm QFN-72 Data – Programmable soft-start – Excellent thermal performance Sheet PDF – XR79115 (15A) – High efficiency • 12x12mm QFN-68 Applications Product – Easier to manufacture – XR79120 (20A) Page www • QFN vs. LGA or BGA – Point of Load Conversion • 12x14mm QFN-74 – Easier to debug – Distributed Power Architecture – Evaluation Board • No hidden pads – FPGA/DSP/Processor Supplies – Faster transient response with – Telecommunications and Infrastructure Equipment ability to work with low ESR capacitors 1

XR79110/15/20 – Typical Application Schematic • Adjustable frequency • No switch node feed-forward compensation components required • Adjustable current limit • 5V to 22V continuous input voltage range • Internal Vcc regulator – PVIN range 3V to 22V with 5V bias 2

XR79110/15/20 Competitive Advantages  Industry’s smallest 20A power module  Better thermal performance  Fast transient response Exar COT  Superior line and load regulation  No switch node feed-forward compensation components required  Excellent efficiency 3

XR79110/15/20 Efficiency XR79110 XR79115 XR79120 f = 500kHz, V IN = 12V f = 500kHz, V IN = 12V f = 500kHz, V IN = 12V Excellent light load efficiency 4

XR79110/15/20 Thermal Performance XR79115 XR79110 XR79120 Standard demo board, 125 ° C die temp 5

Exar’s Proprietary Constant On-Time Control Provides Better Line/Load Regulation Exar’s Constant On-Time Control (COT)  Exar COT architecture results in excellent line and load regulation  Exar’s Patented Emulated Current Mode COT used in several product families – XRP6141 – XR75100 – XR76108/12/15 – XR76203/5/8 – XR79110/15/20 vs. Standard COT from MPS, Semtech, IR 6

Exar COT vs TI DCAP2 Both Stable with Ceramic Output Capacitors  From TPS5158 data sheet:  Exar COT architecture unaffected – You can have both fast transient response and the ability to work with low ESR caps TPS53015 line and load (8A) regulation XRP6141 line and load (25A) regulation 1.250 + 1% 1.240 Typical 1.230 -1% 1.220 1.210 V OUT ( V) 1.200 1.190 1.180 1.170 1.160 1.150 5 10 15 20 V I N ( V) 7

Why Exar Transient is Superior Exar Current Emulation and DC Correction Exar COT conditions the reference giving the architecture the speed customers expect of a constant on-time control DCAP2/3 conditions the FB signal introducing delays 8

XR79110/15/20 Ordering Information and Pinout Refer to Product Data Sheet for latest information 9 XR79110 XR79115 XR79120

XR79110/15/20 Power Modules

XR79110/15/20 - Efficiency > 92%