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Analog Devices Inc. ADM1086AKS-REEL7
- Part No.:
- ADM1086AKS-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
ADM1086AKS-REEL7.pdf
- Description:
- IC SIMPLE SEQUENCER P-P SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,559
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Product details
Overview
ADM1086AKS-REEL7 from Analog Devices is a push-pull output power supply sequencer IC designed to enforce precise time delays between enable signals in multi-rail systems. It monitors input voltage down to 0.6 V, features capacitor-adjustable delay (35 μs base + C×4.8×10⁶ s), operates from −40°C to +125°C, and draws only 15 μA typical supply current. It is used in server motherboard power-up sequencing where staggered regulator activation prevents inrush current and ensures stable rail ramp-up.
For engineers reviewing the ADM1086AKS-REEL7 datasheet, ADM1086AKS-REEL7 pinout, ADM1086AKS-REEL7 application, or ADM1086AKS-REEL7 equivalent, key selection criteria include its push-pull ENOUT stage (no external pull-up required), VIN threshold hysteresis (15 mV), propagation delay timing behavior, and SC70-6 package compatibility with high-density PCB layouts.
Technical Context
The ADM1086AKS-REEL7 implements a comparator-based voltage monitor with internal 0.6 V reference and programmable hysteresis (15 mV), triggering a capacitor-charged timing circuit upon VIN crossing VTH_RISING. Its push-pull output stage delivers active-high ENOUT with 0.8×VCC high-level drive (ISOURCE = 500 μA) and <0.4 V low-level sink (ISINK = 1.2 mA), eliminating external level-shifting components.
It supports cascaded sequencing via ENIN control and VIN monitoring of upstream rails, enabling deterministic multi-supply startup order. The CEXT pin accepts external capacitors (e.g., 470 pF yields ~2 ms delay), and all logic inputs tolerate up to 22 V, allowing direct interfacing with higher-voltage enable inputs of DC/DC converters without translators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Threshold (Rising) | 0.6 V ±40 mV - Enables reliable detection of 0.6 V–22 V monitored supplies, including low-voltage core rails. |
| ENOUT Type | Push-pull CMOS - Drives downstream enable inputs directly without external pull-up resistor or level shifter. |
| Supply Current | 15 μA typical - Minimizes quiescent power impact in always-on sequencing paths for portable and server applications. |
| Delay Base Time | 35 μs (CEXT floating) - Provides fixed minimum assertion delay before capacitor-adjusted timing begins. |
| Operating Temp | −40°C to +125°C - Validated for industrial and automotive under-hood environments requiring extended thermal margin. |
| VIN Hysteresis | 15 mV - Prevents chatter during slow-rising/falling supply ramps, ensuring clean enable signal transitions. |
| ENIN Voltage Range | 0 to 22 V - Allows direct connection to high-side enable pins of buck controllers without interface circuitry. |
Pinout & Package
ADM1086AKS-REEL7 is housed in a 6-lead SC70 (KS-6) package measuring 2.20 mm × 1.35 mm × 0.90 mm, optimized for space-constrained PCBs and compatible with standard SMT reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ENIN | Active-high enable input | Externally gates ENOUT assertion; must be high for output to activate after VIN threshold and delay completion. |
| 2 - GND | Ground reference | Common return for VCC, VIN, ENIN, and ENOUT; requires low-impedance connection to minimize noise coupling. |
| 3 - VIN | Monitored voltage input | Accepts 0–22 V analog rail; compared against internal 0.6 V reference to detect power-good condition. |
| 4 - ENOUT | Push-pull enable output | Active-high logic output driving downstream regulator EN/SHDN pins; no external pull-up needed. |
| 5 - CEXT | Capacitor-adjustable delay node | Connects external capacitor to set delay time per tEN = (C × 4.8×10⁶) + 35 μs; floating = minimal delay. |
| 6 - VCC | IC power supply | 2.25–3.6 V supply powering internal comparator, timer, and output driver; decoupling capacitor required. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-programmable delay | Enables precise, board-level tuning of sequencing intervals (e.g., 470 pF → ~2 ms) without firmware or external logic. |
| Push-pull ENOUT stage | Eliminates need for external pull-up resistors or level shifters when driving 3.3 V or 5 V enable inputs of DC/DC converters. |
| 0.6 V precision voltage monitor | Supports sequencing of modern low-voltage rails (1.2 V, 1.0 V, 0.8 V) using simple resistor dividers on VIN. |
| 22 V tolerant inputs | Allows direct connection to high-voltage enable pins (e.g., 12 V bias rails) without clamping diodes or voltage dividers. |
| −40°C to +125°C operation | Validated across full industrial temperature range, supporting deployment in base stations, routers, and embedded servers. |
Applications
| Server Motherboard Sequencing | Notebook Power Management |
|---|---|
|
Use Scenario: Staggered activation of CPU core (1.0 V), memory (1.2 V), I/O (3.3 V), and auxiliary (5 V) rails during cold boot. IC Role / Device Role / Timing Role: ADM1086AKS-REEL7 acts as a hardware-enforced delay element between upstream and downstream regulator enable chains. Use Value: Prevents simultaneous inrush current draw that could trip system overcurrent protection or cause rail collapse. |
Use Scenario: Ensuring GPU power (1.8 V) ramps after main SoC (1.2 V) and before display backlight (5 V) in ultrabook designs. IC Role / Device Role / Timing Role: ADM1086AKS-REEL7 serves as a dedicated, low-power timing gate inserted between voltage monitor outputs and regulator EN pins. Use Value: Guarantees safe power-up sequence without software intervention, improving boot reliability and reducing BOM count. |
| Telecom Line Card Power | Industrial PLC Module |
|
Use Scenario: Coordinating power delivery to FPGA, transceiver, and PHY ICs on a 10G Ethernet line card with strict rail-order requirements. IC Role / Device Role / Timing Role: ADM1086AKS-REEL7 functions as a deterministic, analog-based sequencer replacing FPGA-configurable logic for critical startup timing. Use Value: Removes dependency on FPGA configuration state during power-up, enabling fail-safe sequencing even before firmware loads. |
Use Scenario: Enabling isolated 24 V, 12 V, and 5 V rails in programmable logic controller modules operating in harsh factory environments. IC Role / Device Role / Timing Role: ADM1086AKS-REEL7 provides robust, temperature-stable sequencing control immune to EMI-induced digital glitches. Use Value: Maintains consistent startup behavior across −40°C to +125°C ambient, meeting industrial safety and reliability standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power supply sequencing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM1085AKSZ-REEL7 | Open-drain ENOUT requiring external pull-up; identical VIN threshold, delay equation, and pinout. | Suitable when interfacing with regulators having 12 V or 22 V enable inputs needing level translation. | Select when high-voltage enable signaling (>3.6 V) is required; not drop-in due to output stage mismatch. |
| TPS3808G33DBVR | Fixed 3.3 V reset threshold; no capacitor-adjustable delay; push-pull output; 1.8–6 V VCC range. | Used for simple power-good monitoring rather than multi-rail sequencing with variable delays. | Choose for basic supervisor functions without sequencing flexibility; lacks VIN hysteresis tuning and cascading capability. |
Compared with ADM1085AKSZ-REEL7 and TPS3808G33DBVR, the ADM1086AKS-REEL7 uniquely combines push-pull drive, 0.6 V adjustable monitoring, and capacitor-tunable delay in a single SC70-6 device-enabling compact, self-contained sequencing without external components or firmware dependencies.
Availability
ADM1086AKS-REEL7 is available at Aetrix Electronics and suitable for server motherboard design, telecom line card development, and industrial PLC power management requiring stable component supply and long-term production continuity.
Supply support for ADM1086AKS-REEL7 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and consumer markets since 1965.
The ADM1086AKS-REEL7 belongs to the Simple Sequencers® family, engineered specifically for deterministic, low-power, hardware-based power supply sequencing in multi-rail systems where firmware-controlled timing is unreliable or unavailable.
FAQ
What is the function of the CEXT pin on the ADM1086AKS-REEL7?
The CEXT pin on the ADM1086AKS-REEL7 connects to an external capacitor that sets the time delay between VIN crossing the 0.6 V threshold and ENOUT assertion. Delay follows tEN = (C × 4.8×10⁶) + 35 μs, where C is in farads. With CEXT floating, delay defaults to 35 μs. This enables precise, passive tuning of sequencing intervals without software or additional ICs.
Can the ADM1086AKS-REEL7 monitor a 1.0 V supply directly?
Yes - the ADM1086AKS-REEL7 can monitor a 1.0 V supply directly by connecting it to the VIN pin. Its internal 0.6 V reference and comparator allow detection of any supply ≥0.6 V. For exact threshold matching, use a resistor divider to scale higher voltages down to 0.6 V; no scaling is needed for 1.0 V, as the device's 15 mV hysteresis ensures stable triggering.
Does the ADM1086AKS-REEL7 require an external pull-up resistor on ENOUT?
No - the ADM1086AKS-REEL7 features a push-pull (CMOS) output stage on ENOUT, capable of actively driving high (to 0.8×VCC) and low (<0.4 V) without external components. This distinguishes it from the open-drain ADM1085/ADM1087 variants and simplifies interface design with 3.3 V or 5 V enable inputs of DC/DC converters.
What is the maximum voltage allowed on the ENIN pin of the ADM1086AKS-REEL7?
The ENIN pin of the ADM1086AKS-REEL7 is rated for −0.3 V to +25 V per Absolute Maximum Ratings, and operates reliably from 0 V to 22 V. This allows direct connection to high-voltage enable signals (e.g., 12 V bias rails or 19 V laptop adapters) without level-shifting circuitry - a key advantage in mixed-voltage system designs.
How does the ADM1086AKS-REEL7 behave during power-down?
During power-down, the ADM1086AKS-REEL7 deasserts ENOUT immediately when VIN falls below the falling threshold (0.585 V typical) or when ENIN is deactivated - with no delay. This ensures rapid, deterministic shutdown of downstream regulators, supporting controlled power-down sequences and preventing latch-up or brown-out conditions in cascaded supply chains.
ADM1086AKS-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Sequencer
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
ADM1086AKS-REEL7 FAQ
1.How can I place an order for ADM1086AKS-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1086AKS-REEL7 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 ADM1086AKS-REEL7 reliable?
The price and inventory of ADM1086AKS-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1086AKS-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM1086AKS-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1086AKS-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1086AKS-REEL7?
ADM1086AKS-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1086AKS-REEL7 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 ADM1086AKS-REEL7?
For technical support, including ADM1086AKS-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1086AKS-REEL7 requirements.
6.How does Aetrix verify that ADM1086AKS-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM1086AKS-REEL7 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 ADM1086AKS-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM1086AKS-REEL7?
All ADM1086AKS-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1086AKS-REEL7, 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 ADM1086AKS-REEL7 part is unused and in its original packaging.
Return procedure for ADM1086AKS-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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