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IRU3037CSPBF Datasheet(PDF) 1 Page - International Rectifier |
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IRU3037CSPBF Datasheet(HTML) 1 Page - International Rectifier |
1 / 21 page IRU3037/IRU3037A & (PbF) 1 www.irf.com TYPICAL APPLICATION DESCRIPTION The IRU3037 controller IC is designed to provide a low cost synchronous Buck regulator for on-board DC to DC converter applications. With the migration of today’s ASIC products requiring low supply voltages such as 1.8V and lower, together with currents in excess of 3A, traditional linear regulators are simply too lossy to be used when input supply is 5V or even in some cases with 3.3V input supply. The IRU3037 together with dual N-channel MOSFETs such as IRF7313, provide a low cost solution for such applications. This device features an internal 200KHz oscillator (400KHz for "A" version), under-volt- age lockout for both Vcc and Vc supplies, an external programmable soft-start function as well as output un- der-voltage detection that latches off the device when an output short is detected. Synchronous Controller in 8-Pin Package Operating with single 5V or 12V supply voltage Internal 200KHz Oscillator (400KHz for IRU3037A) Soft-Start Function Fixed Frequency Voltage Mode 500mA Peak Output Drive Capability Protects the output when control FET is shorted SOIC 8-Lead also available LEAD-FREE PACKAGE ORDER INFORMATION FEATURES 8-PIN SYNCHRONOUS PWM CONTROLLER APPLICATIONS DDR memory source sink Vtt application Low cost on-board DC to DC such as 5V to 3.3V, 2.5V or 1.8V Graphic Card Hard Disk Drive Data Sheet No. PD94173 revD Figure 1 - Typical application of IRU3037 or IRU3037A. IRU3037 U1 Vcc Vc HDrv LDrv Fb Gnd Comp SS/SD C3 1uF C4 1uF C8 0.1uF C9 2200pF R4 24k Q1 1/2 of IRF7313 Q2 1/2 of IRF7313 R5 1.24K, 1% R3 249, 1% L2 D05022P-562, 5.6uH, 5.3A L1 1uH C2 10TPB100M, 100uF, 55m Ω C1 47uF 1.5V/5A C7 2x 6TPC150M, 150uF, 40m Ω 12V 5V TA (°C) DEVICE LEADFREE DEVICE PACKAGE FREQUENCY 0 To 70 IRU3037CF IRU3037CFPbF 8-Pin Plastic TSSOP (F) 200KHz 0 To 70 IRU3037CS IRU3037CSPbF 8-Pin Plastic SOIC NB (S) 200KHz 0 To 70 IRU3037ACF IRU3037ACFPbF 8-Pin Plastic TSSOP (F) 400KHz 0 To 70 IRU3037ACS IRU3037ACSPbF 8-Pin Plastic SOIC NB (S) 400KHz |
Similar Part No. - IRU3037CSPBF |
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Similar Description - IRU3037CSPBF |
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