ADM1051AJR

$1.84

Description：IC REG BDGAP DUAL 1.5/1.8V 8SOIC
Series：-
Mfr：Analog Devices Inc.
Package：Tube

SKU:177ac1d497fc Category: DC DC Switching Controllers Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC REG BDGAP DUAL 1.5/1.8V 8SOIC
Series：-
Mfr：Analog Devices Inc.
Package：Tube
Output Type：Transistor Driver
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Number of Outputs：2
Output Phases：1
Voltage - Supply (Vcc/Vdd)：12V
Frequency - Switching：-
Duty Cycle (Max)：-
Synchronous Rectifier：No
Clock Sync：No
Serial Interfaces：-
Control Features：Enable, Frequency Control, Power on Reset
Operating Temperature：0°C ~ 70°C
Mounting Type：Surface Mount
Package / Case：8-SOIC (0.154", 3.90mm Width)
Supplier Device Package：8-SOIC
Grade：-
Qualification：-

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ADM1051AJR

Overview

The ADM1051AJR is a dual precision voltage regulator controller designed for power rail generation and active bus termination on personal computer motherboards. It integrates a precision 1.2 V bandgap reference and two independent control channels driving external N-channel MOSFETs. The device provides fixed 1.5 V and 1.8 V outputs with ±2.5% accuracy over line, load, and temperature variations. Each channel includes shutdown inputs and Hiccup Mode protection circuitry. The component operates within an input voltage range of 11.28 V to 12.72 V, typically at 12 V, and functions up to a maximum operating temperature of 70 °C.

Feature Summary

Dual independent controllers integrated on a single chip for efficient power management
Precision 1.2 V bandgap reference ensuring stable output regulation
Integrated Hiccup Mode fault protection for enhanced system reliability
Compatibility with PC motherboard TYPEDET signal for flexible voltage selection

Applications

Desktop computers
Servers
Workstations

Procurement Notes

Verify the specific suffix (e.g., JR vs. JRZ) against the manufacturer's current product status, as availability may vary between bulk and reel packaging options. Confirm that the component meets required environmental compliance standards such as RoHS before integration into final designs.

Selection Notes

Select this controller when designing systems requiring precise dual voltage rails for CPU or chipset power delivery. Ensure external N-channel MOSFETs are compatible with the drive capabilities. Consider the thermal limits and package size constraints inherent to the 8-lead SOIC form factor during layout planning.

Part Context

This component belongs to the ADM1051 family of precision dual voltage regulator controllers manufactured by Analog Devices Inc. It is specifically engineered for legacy and modern PC motherboard architectures where stable 1.5 V and 1.8 V supplies are critical for processor operation and bus termination.