EL7564 Data Sheet May 9, 2005 FN7297.3 Monolithic 4 Amp DC/DC Step-Down Features Regulator Integrated synchronous MOSFETs and current mode The EL7564 is an integrated, full-featured synchronous step- controller down regulator with output voltage adjustable from 1.0V to 4A continuous output current 3.8V. It is capable of delivering 4A continuous current at up Up to 95% efficiency to 95% efficiency. The EL7564 operates at a constant frequency pulse width modulation (PWM) mode, making 4.5V to 5.5V input voltage external synchronization possible. Patented on-chip Adjustable output from 1V to 3.8V resistorless current sensing enables current mode control, which provides cycle-by-cycle current limiting, over-current Cycle-by-cycle current limit protection, and excellent step load response. The EL7564 Precision reference features power tracking, which makes the start-up 0.5% load and line regulation sequencing of multiple converters possible. A junction temperature indicator conveniently monitors the silicon die Adjustable switching frequency to 1MHz temperature, saving the designer time on the tedious Oscillator synchronization possible thermal characterization. The minimal external components and full functionality make this EL7564 ideal for desktop and Internal soft start portable applications. Over voltage protection The EL7564 is specified for operation over the -40C to Junction temperature indicator +85C temperature range. Over temperature protection Typical Application Diagrams Under voltage lockout EL7564 Multiple supply start-up tracking 20-PIN SO (0.300) TOP VIEW Power good indicator 20-pin SO (0.300) package C5 0.1F 28-pin HTSSOP package 1 EN 20 VREF Pb-Free available (RoHS compliant) C4 2 SGND FB 19 390pF Applications 3 COSC PG 18 R4 C3 22 DSP, CPU core and IO supplies 4 VDD VDRV 17 0.22F C6 D1 Logic/Bus supplies 5 VTJ VHI 16 0.22F V OUT C2 Portable equipment 3.3V, 4A 6 PGND LX 15 L1 2.2nF 4.7H DC/DC converter modules 7 PGND LX 14 V C10 IN C1 R2 C7 5V 330F 2.37k 330F 100pF GTL + Bus power supply 8 VIN PGND 13 9 STP PGND 12 R1 1k 10 STN PGND 11 Typical Application Diagrams continued on page 3 Manufactured Under U.S. Patent No. 5,7323,974 CAUTION: These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures. 1 1-888-INTERSIL or 1-888-352-6832 Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2003, 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. NOT S RECOMMENDED FOR NEW DE IGNS E S E EL7554EL7564 Ordering Information TAPE & PKG. DWG. PART NUMBER PACKAGE REEL EL7564CM 20-Pin SO (0.300) - MDP0027 EL7564CM-T13 20-Pin SO (0.300) 13 MDP0027 EL7564CMZ 20-Pin SO (0.300) - MDP0027 (See Note) (Pb-free) EL7564CMZ-T13 20-Pin SO (0.300) 13 MDP0027 (See Note) (Pb-free) EL7564CRE 28-Pin HTSSOP - MDP0048 EL7564CRE-T7 28-Pin HTSSOP 7 MDP0048 EL7564CRE-T13 28-Pin HTSSOP 13 MDP0048 EL7564CREZ 28-Pin HTSSOP - MDP0048 (See Note) (Pb-free) EL7564CREZ-T7 28-Pin HTSSOP 7 MDP0048 (See Note) (Pb-free) EL7564CREZ-T13 28-Pin HTSSOP 13 MDP0048 (See Note) (Pb-free) NOTE: Intersil Pb-free products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. FN7297.3 2 May 9, 2005