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IRU3137, IRU3137CS, IRU3138

Table of contents:
Info of IRU3137
Info of IRU3137CS
Info of IRU3138

IRU3137, IRU3137CS, IRU3138 Selling Leads, Datasheet

MFG:01+ Package Cooled:09+ D/C:1300

IRU3137, IRU3137CS, IRU3138 Datasheet download

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Part Number: IRU3137

MFG: 01+

Package Cooled: 09+

D/C: 1300

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IRU3137 General 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.

IRU3137 Maximum Ratings

Vcc Supply Voltage .................................................. -0.5V - 25V
Vc Supply Voltage .................................................... -0.5V - 25V
Storage Temperature Range ............................ -65°C To 150°C
Operating Junction Temperature Range ...............0°C To 125°C

CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device.

IRU3137 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

IRU3137 Typical Application

· 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

IRU3137 Connection Diagram

IRU3138 General Description

The IRU3138 controller IC is designed to provide a low cost synchronous Buck regulator for voltage tracking applications such DDR memory and general purpose on-board DC to DC converter. Modern micro processors combined with DDR memory, need high-speed bandwidth data bus which requires a particular bus termination voltage. This voltage will be tightly regulated to track the half of chipset voltage for best performance. The IRU3138 together with two N-channel MOSFETs, provide a low cost solution for such applications. This device features a programmable frequency set from 200KHz to 400KHz, 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.

IRU3138 Maximum Ratings

VCC Supply Voltage .......................................................... -0.5V - 25V
VC Supply Voltage ............................................................ -0.5V - 25V
Storage Temperature Range ................................... -65°C To 150°C
Operating Junction Temperature Range ..................... 0°C To 125°C
CAUTION: Stresses above those listed in "Absolute Maximum Ratings"
may cause permanent damage to the device.

IRU3138 Features

·1A Peak Output Drive Capability
·0.8V Precision Reference Voltage Available
·Shuts off both drivers at shorted output and shutdown
·200KHz to 400KHz operation set by an external resistor
·Soft-Start Function
·Uncommitted Error Amplifier available for DDR voltage tracking application
·Protects the output when control FET is shorted
·Synchronous Controller in 14-Pin Package

IRU3138 Typical Application

·DDR memory source sink Vtt application
·Graphic Card
·Low cost on-board DC to DC such as 5V to 3.3V, 2.5V or 1.8V

IRU3138 Connection Diagram

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