My Inquiry
My Account
Analog Devices Inc. ADM1052JR-REEL
- Part No.:
- ADM1052JR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- -
- Datasheet:
-
ADM1052JR-REEL.pdf
- Description:
- IC REG BDGAP PREC DUAL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADM1052JR-REEL from Analog Devices is a dual-channel precision voltage regulator controller designed for active bus termination and power rail generation on PC motherboards. It delivers two independent 2.525 V outputs with ±2.5% accuracy over line, load, and temperature (0°C to 70°C), drives external N-channel MOSFETs in source-follower configuration, and features hiccup-mode fault protection and per-channel shutdown control.
For engineers reviewing the ADM1052JR-REEL datasheet, ADM1052JR-REEL pinout, ADM1052JR-REEL application, or ADM1052JR-REEL equivalent, key selection criteria include dual-channel 2.525 V regulation accuracy, hiccup-mode short-circuit protection timing (30–90 ms hold-off, 0.5–1.5 ms on-time), SOIC-8 package compatibility, and support for external low-RDS(on) N-MOSFETs in high-current motherboard VRM stages.
Technical Context
The ADM1052JR-REEL integrates a precision 1.2 V bandgap reference and two independent control amplifiers-each with 100 dB open-loop gain, 3 V/µs slew rate, and 5 µs closed-loop settling time-to regulate output voltage via feedback from SENSE1/SENSE2 pins. It operates from a 12 V VCC supply and requires no external resistors for voltage setting.
Each channel implements active-low shutdown (SHDN1/SHDN2) with internal 50 µA pull-up and hiccup-mode protection triggered when output falls below 0.8 × VOUT (i.e., 2.02 V). The hiccup comparator includes 100 µs glitch immunity and enforces a 1:40 duty cycle (on-time/off-time ≈ 1 ms / 40 ms) during fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.525 V per channel - precisely set by internal reference and feedback topology; no external resistors required. |
| Output Accuracy | ±2.5% over line (3.0–3.6 V), load (10 mA–1 A), and temperature (0°C–70°C) - ensures stable DDR/PCI termination voltage under real-world PC operating conditions. |
| Hiccup Hold-Off Time | 30–90 ms - prevents false triggering during power-up or channel enable; starts at VCC ≥ 6 V. |
| Control Amplifier Slew Rate | 3 V/µs - enables fast gate drive for external N-MOSFETs, supporting ≤5 µs transient response to 10 mA ↔ 2 A load steps. |
| Supply Current (Active) | 2.4–4.0 mA - low quiescent draw supports energy-efficient motherboard power management. |
| Shutdown Current | 600–1000 µA - minimal leakage when both channels disabled, preserving system standby integrity. |
| Power-On Reset Threshold | 6–9 V - ensures regulated output remains disabled until VCC stabilizes, preventing premature MOSFET turn-on. |
Pinout & Package
ADM1052JR-REEL is housed in an 8-lead SOIC (SO-8) package with standard narrow-body dimensions (5.00 mm × 4.00 mm × 1.50 mm), RoHS-compliant, and rated for 0°C to 70°C commercial operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - FORCE 2 | Channel 2 control amplifier output | Drives gate of external N-MOSFET; swing: 2 V (low) to 10 V (high) into 10 kΩ load - sufficient to fully enhance logic-level MOSFETs. |
| 2 - SENSE 2 | Channel 2 feedback input | Connects to MOSFET source node; high-impedance (50 kΩ) input minimizes loading on remote-sense traces for accurate regulation at load point. |
| 3 - SHDN2 | Channel 2 active-low shutdown | Logic-compatible input (VIL ≤ 0.8 V, VIH ≥ 2.0 V); internal 50 µA pull-up allows floating = enabled - simplifies PCB routing. |
| 4 - GND | Analog ground reference | Common return for all internal circuitry; must be connected to clean, low-impedance system ground near load to avoid sense error. |
| 5 - SHDN1 | Channel 1 active-low shutdown | Independent control of Channel 1; identical electrical specs to SHDN2 - enables staggered power sequencing in multi-rail systems. |
| 6 - SENSE 1 | Channel 1 feedback input | Matches SENSE 2 function; used with FORCE 1 to close loop for first 2.525 V rail - supports split-bus or dual-termination topologies. |
| 7 - FORCE 1 | Channel 1 control amplifier output | Identical to FORCE 2; drives separate N-MOSFET - allows independent current capacity and thermal management per channel. |
| 8 - VCC | 12 V supply input | Primary power rail; powers internal reference, amplifiers, and comparators; requires local 1 µF decoupling to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent controllers | Enables simultaneous regulation of two 2.525 V rails (e.g., AGP and PCI termination) without cross-talk or shared failure modes. |
| Hiccup-mode fault protection | Self-resetting 1:40 duty-cycle pulsing (≈1 ms on / 40 ms off) limits MOSFET power dissipation during sustained short circuits - eliminates need for external current-sense resistors. |
| No external voltage-setting resistors | Internal 1.2 V reference and fixed-gain amplifier architecture fix output at 2.525 V - reduces BOM count, layout area, and calibration drift. |
| Low-quiescent-current shutdown | Sub-1 mA total supply current in shutdown mode - critical for maintaining low standby power in ACPI S3/S4 states. |
| N-channel MOSFET optimization | Designed explicitly for cost-effective, high-performance N-MOSFETs in source-follower configuration - avoids expensive P-channel devices and complex compensation networks. |
Applications
| Desktop Computer Motherboards | Servers |
|---|---|
|
Use Scenario: Regulating 2.525 V active termination voltage for AGP and PCI buses on ATX form-factor motherboards. IC Role / Device Role / Timing Role: Dual-channel voltage regulator controller driving external PHD55N03LT/MTD3055VL N-MOSFETs as source-followers. Use Value: Maintains precise 2.525 V under dynamic load (10 mA–2 A) with ±2.5% accuracy, ensuring signal integrity and compliance with PCI/AGP specification DC levels. |
Use Scenario: Providing redundant 2.525 V termination rails for dual-processor server boards with hot-swap capability. IC Role / Device Role / Timing Role: Independent channel shutdown (SHDN1/SHDN2) enables controlled power sequencing during CPU hot-plug events. Use Value: Hiccup-mode protection prevents catastrophic MOSFET failure during connector mating faults - improves field reliability without adding sensing components. |
| Workstations | High-Performance Computing Nodes |
|
Use Scenario: Generating matched 2.525 V rails for memory interface termination and chipset I/O supply in dual-CPU workstations. IC Role / Device Role / Timing Role: Precision 1.2 V bandgap reference and 100 dB amplifier gain ensure <5 mV load/line regulation - critical for low-jitter clock distribution. Use Value: 5 µs transient response to 2 A load steps minimizes voltage droop during burst memory access, reducing timing margin violations. |
Use Scenario: Active bus termination in dense blade-server backplanes where space-constrained SOIC-8 footprint is mandatory. IC Role / Device Role / Timing Role: SO-8 package and 650 mW thermal rating allow placement near high-current MOSFETs without thermal derating penalties. Use Value: Low 2.4–4.0 mA active supply current reduces cumulative power overhead across dozens of nodes in rack-scale deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel precision regulator controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS51100PWR | Single-channel 2.5 V controller with integrated MOSFET driver; lacks hiccup-mode protection and dual-channel independence. | Requires two ICs for dual-rail implementation; higher board area and BOM cost. | Choose only if system uses discrete MOSFETs per rail and requires tighter 1.5% output accuracy. |
| ISL6522CBZ | Two-phase synchronous buck controller; generates adjustable output (0.9–3.3 V) but requires external inductors and MOSFETs. | Supports higher current (>10 A) but adds complexity, cost, and EMI filtering requirements. | Select when >2 A per rail is needed and board space allows discrete inductor placement. |
Compared with TPS51100PWR and ISL6522CBZ, the ADM1052JR-REEL uniquely combines dual-channel 2.525 V regulation, hiccup-mode fault protection, and N-MOSFET source-follower drive in a single SOIC-8 package - optimizing cost, layout simplicity, and reliability for sub-2 A motherboard termination rails.
Availability
ADM1052JR-REEL is available at Aetrix Electronics and suitable for desktop computers, servers, and workstations requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for ADM1052JR-REEL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The ADM1052JR-REEL belongs to Analog Devices' precision power management controller product line, engineered specifically for cost-sensitive, high-reliability PC and server motherboard power delivery - emphasizing simplicity, fault resilience, and compatibility with commodity N-channel MOSFETs.
FAQ
What is the nominal output voltage of the ADM1052JR-REEL?
The ADM1052JR-REEL provides two independent, fixed 2.525 V outputs - derived from an internal 1.2 V precision bandgap reference and fixed-gain amplifier architecture. This value is guaranteed across line (3.0–3.6 V input), load (10 mA–1 A), and temperature (0°C–70°C), with ±2.5% total accuracy. No external resistors are required to set this voltage, simplifying design and improving long-term stability.
How does hiccup-mode protection work in the ADM1052JR-REEL?
In the ADM1052JR-REEL, hiccup-mode protection activates when either output falls below 0.8 × 2.525 V (i.e., 2.02 V), indicating a short-circuit or overload. The affected channel's control amplifier is pulsed on/off with a 1:40 duty cycle - approximately 1 ms on-time followed by 40 ms off-time - limiting average power dissipation in the external MOSFET. A 30–90 ms hold-off period prevents false triggering during power-up or channel enable.
Which external MOSFETs are recommended for use with the ADM1052JR-REEL?
Analog Devices validates PHD55N03LT (Philips) and MTD3055VL (Motorola) for use with the ADM1052JR-REEL - both N-channel devices optimized for source-follower operation. The PHB11N06LT (Philips) is also confirmed compatible. Selection depends on required current and thermal budget: lower RDS(on) devices increase hiccup trip current (IHICCUP = (VIN – 2.02 V)/RDS(on)), so matching MOSFET RDS(on) to expected fault current is essential.
What is the function of the SHDN1 and SHDN2 pins on the ADM1052JR-REEL?
SHDN1 and SHDN2 are independent active-low digital inputs that disable the respective channel's control amplifier output (FORCE1/FORCE2) when pulled low. Each pin includes a 50 µA internal pull-up, allowing floating connections to default to enabled operation. This enables flexible power sequencing - for example, enabling Channel 1 before Channel 2 during system boot - and supports ACPI-compliant sleep/wake transitions without external logic.
Does the ADM1052JR-REEL require external compensation components?
No, the ADM1052JR-REEL does not require external compensation components. Its control amplifiers are internally compensated for stability with typical external N-MOSFETs and recommended decoupling (1 µF on VCC, 100 µF on each MOSFET drain/source). The datasheet confirms stability up to 2 A load with PHD55N03LT/MTD3055VL and two parallel 100 µF capacitors - eliminating loop compensation design effort and reducing risk of oscillation in high-noise motherboard environments.
ADM1052JR-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Type:
- -
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Number of Outputs:
- -
- Output Phases:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Frequency - Switching:
- -
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- -
- Clock Sync:
- -
- Serial Interfaces:
- -
- Control Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
ADM1052JR-REEL FAQ
1.How can I place an order for ADM1052JR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1052JR-REEL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADM1052JR-REEL reliable?
The price and inventory of ADM1052JR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1052JR-REEL is usually 5 days.
3.What payment methods are accepted for ADM1052JR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1052JR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1052JR-REEL?
ADM1052JR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1052JR-REEL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADM1052JR-REEL?
For technical support, including ADM1052JR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1052JR-REEL requirements.
6.How does Aetrix verify that ADM1052JR-REEL is sourced from the original manufacturer or authorized distributors?
All ADM1052JR-REEL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADM1052JR-REEL meets industry standards.
7.What is the process for return or replacement of ADM1052JR-REEL?
All ADM1052JR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM1052JR-REEL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADM1052JR-REEL part is unused and in its original packaging.
Return procedure for ADM1052JR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADM1052JR-REEL Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
