IRU3137 Datasheet | International Rectifier

FEATURES 1A Peak Output Drive Capability 0.8V Reference Voltage Shuts off both drivers at shorted output and shutdown Operating with single 5V or 12V supply voltage Stable with ceramic capacitors Internal 200KHz Oscillator Soft-Start Function Protects the output when control FET is shorted Synchronous Controller in 8-Pin Package DESCRIPTION The IRU3137 controller IC is designed to provide a low cost and high performance synchronous Buck regulator for on-board DC to DC converter applications. The output voltage can be set as low as 0.8V and higher voltage can be obtained with an external voltage divider. High peak current gate drivers provide fast switching transition for applications requiring high output current in the range of 15A to 20A. This device features an internal 200KHz oscillator, under-voltage lockout for both Vcc and Vc supplies, an external programmable soft-start function as well as output under-voltage detection that latches off the device when an output short is detected. .. APPLICATIONS DDR Memory Application Low voltage distributed DC-DC Graphic Cards Low cost on-board DC to DC such as 5V to 2.5V, 1.8V or 0.8V TYPICAL APPLICATION 12V C3 1u F C4 1u F C2 4x 150u F Optional L1 1u H C1 47u F 5V Vcc Vc HDrv D1 Q1 IRF7832 L2 2.2u H Q2 IRF7832 SS/SD C8 0.1u F 2.5V @ 15A C7 3x 330u F 40mΩ , Poscap U1 LDrv IRU3137 p Fb R4 30K R3 2.15K R5 1K, 1% C9 3300p F Optional Gnd Figure 1 - Typical application of IRU3137. PACKAGE ORDER INFORMATION TA (°C) 0 To 70 Rev. 1.0 06/22/04 DEVICE IRU3137CS PACKAGE 8-Pin Plastic SOIC NB (S) .irf. FREQUENCY 200KHz ABSOLUTE MAXIMUM RATINGS Vcc Supply Voltage Vc Supply Voltage Storage Temperature Range Operating Junction Temperature Range -0.5V - 25V -0.5V - 25V -65°C To 150°C 0°C To 125°C CAUTION: Stresses above those listed in "Absolute...