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Product Detailed Parameters
- Description：IC REG BDGAP DUAL 1.5/1.8V 8SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Bulk
- 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：-
- Serial Interfaces：-
- Control Features：Enable, Frequency Control, Power on Reset
- Operating Temperature：0°C ~ 70°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The ADM1051AJR-REEL is a dual precision voltage regulator controller manufactured by Analog Devices Inc. It integrates two independent channels designed for power rail generation and active bus termination on personal computer motherboards. The device features a precision 1.2 V bandgap reference and control amplifiers driving external N-channel MOSFETs. It provides fixed outputs of 1.515 V and 1.818 V with ±2.5% accuracy over line, load, and temperature variations. The component operates within an industrial temperature range and utilizes an 8-lead SOIC package.
Feature Summary
- Integrates two independent precision controllers on a single chip for efficient power management
- Includes Hiccup Mode protection circuitry to safeguard external power devices during fault conditions
- Features shutdown inputs allowing precise control over each channel's output state
- Compatible with PC motherboard TYPEDET signals for selectable output voltage configuration
Applications
- Power rail generation on desktop computer motherboards
- Active bus termination in server systems
- Workstation power supply architectures
Procurement Notes
Verify the specific suffix against official Analog Devices documentation to confirm package type and tape/reel specifications. Ensure compatibility with existing motherboard designs requiring 1.5V and 1.8V rails. Confirm RoHS compliance status through current manufacturer datasheets as regulatory standards may evolve. Cross-reference pinouts with legacy schematics to prevent integration errors.
Selection Notes
Select this component when designing systems requiring dual regulated voltages with minimal external resistor networks. It is suitable for applications needing low quiescent current and precise voltage regulation without complex feedback loops. Consider the 8-lead SOIC footprint for space-constrained PCB layouts. Evaluate thermal performance requirements relative to the integrated power dissipation capabilities.
Part Context
This part belongs to the ADM1051 family of dual switching controllers from Analog Devices. These components are specialized for PC motherboard power delivery, offering a compact solution compared to discrete regulator designs. The series emphasizes accuracy and ease of implementation by eliminating external setting resistors. It represents a dedicated solution for legacy and modern PC power architectures.
Replacement Considerations
The ADM1051A is a variant within the same family offering sequenced power-up features. Verify functional equivalence regarding output voltages and pin configurations before substitution. Consult official cross-reference lists for confirmed compatible replacements.
