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Analog Devices Inc. ADM1088AKS-REEL7
- Part No.:
- ADM1088AKS-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
ADM1088AKS-REEL7.pdf
- Description:
- IC SIMPLE SEQUENCER P-P SC70-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADM1088AKS-REEL7 from Analog Devices is a programmable power supply sequencer IC designed to control enable timing between voltage regulators in multi-rail systems. It features capacitor-adjustable delay (35 μs to >2 ms), 0.6 V input threshold monitoring, −40°C to +125°C operation, and 6-lead SC70 packaging. It is used in notebook computers and base station line cards to ensure safe, staggered power-up of 1.2 V, 1.8 V, 2.5 V, and 3.3 V rails.
For engineers reviewing the ADM1088AKS-REEL7 datasheet, ADM1088AKS-REEL7 pinout, ADM1088AKS-REEL7 application, or ADM1088AKS-REEL7 equivalent, key selection criteria include VIN threshold hysteresis (15 mV), ENIN/ENOUT propagation delay (0.5 μs), open-drain output compatibility with up to 22 V pull-ups, and CEXT-based timing precision across temperature.
Technical Context
The ADM1088AKS-REEL7 implements a comparator-based voltage monitor with internal 0.6 V reference and hysteresis (15 mV), enabling reliable detection of supply ramping above VTH_RISING (0.56–0.64 V) and release below VTH_FALLING (0.545–0.625 V). Its timing engine uses a 250 nA current source charging CEXT to generate programmable delays per tEN = (C × 4.8×10⁶) + 35 μs.
It supports cascaded sequencing via ENIN-controlled AND logic: ENOUT asserts only when both VIN > VTH_RISING and ENIN is asserted (active-high), with no delay on ENIN transitions. The open-drain output stage tolerates up to 22 V at ENOUT, allowing level-shifting for diverse regulator enable inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Threshold | 0.6 V typical rising threshold; enables precise monitoring of low-voltage rails down to 0.6 V using external resistor dividers. |
| VIN Hysteresis | 15 mV; prevents chatter during slow-rising/falling supply edges and improves noise immunity in noisy power environments. |
| CEXT Delay Range | 35 μs (CEXT floating) to >2 ms (CEXT = 470 pF); provides fine-grained, capacitor-programmable sequencing intervals without external logic. |
| Supply Current | 15 μA typical; minimizes quiescent load on always-on bias rails in portable and energy-sensitive systems. |
| Operating Temp | −40°C to +125°C; qualified for industrial and telecom infrastructure applications including base stations and line cards. |
| ENOUT Output Type | Open-drain; allows pull-up to 22 V, enabling direct interface with high-voltage enable inputs of DC/DC converters and LDOs. |
| ENIN Logic Polarity | Active-high; simplifies control integration with microcontrollers and system supervisors asserting standard logic-high enable signals. |
Pinout & Package
ADM1088AKS-REEL7 is housed in a 6-lead SC70 (KS-6) package - ultra-compact (2.0 mm × 1.25 mm × 0.9 mm), surface-mount, RoHS-compliant, with 0.65 mm lead pitch and JEDEC MO-203-AB compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ENIN | Enable Input | Active-high digital control signal; enables or disables ENOUT assertion regardless of VIN state; tolerates up to 22 V. |
| 2 - GND | Ground Reference | Analog and digital ground return; must be low-impedance and co-located with VIN sensing network for accurate threshold detection. |
| 3 - VIN | Monitored Voltage Input | Accepts divided-down rail voltage; compared internally to 0.6 V reference; supports 0.6 V–22 V input range with 170 μA leakage at 22 V. |
| 4 - ENOUT | Enable Output | Open-drain output; sinks current when asserted; requires external pull-up; compatible with 1.8 V–22 V logic families. |
| 5 - CEXT | Delay Capacitor Terminal | Connects external timing capacitor; charges at 250 nA to set delay; floating CEXT yields 35 μs base delay. |
| 6 - VCC | Supply Voltage | Powers internal circuitry; operates from 2.25 V to 3.6 V; draws only 15 μA, enabling use on standby rails. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-programmable delay | Enables precise, repeatable sequencing intervals (35 μs–2+ ms) without trimming resistors or firmware - ideal for fixed-function power management. |
| 0.6 V input threshold with hysteresis | Supports direct monitoring of modern sub-1 V core supplies (e.g., 0.85 V GPU rails) while rejecting noise via 15 mV hysteresis window. |
| 22 V-tolerant ENOUT and ENIN | Eliminates level-shifter ICs when interfacing with high-voltage enable inputs (e.g., 12 V DC/DC controllers), reducing BOM count and layout area. |
| −40°C to +125°C operation | Validated performance across full industrial temperature range ensures reliability in base station RF modules and automotive-infotainment power trees. |
| 6-lead SC70 footprint | Minimizes PCB real estate (2.0 mm × 1.25 mm) and thermal resistance (θJA = 146°C/W), supporting high-density portable and networking designs. |
Applications
| Desktop & Notebook Power Sequencing | Telecom Line Card Supplies |
|---|---|
|
Use Scenario: Staggered power-up of CPU core (1.2 V), I/O (1.8 V), memory (2.5 V), and chipset (3.3 V) rails in ultrabooks. IC Role / Device Role / Timing Role: Sequencer enforcing LOFO (Last-On, First-Off) behavior by delaying downstream enable signals until upstream rail reaches 0.6 V threshold. Use Value: Prevents back-powering and latch-up in mixed-voltage SoCs by guaranteeing strict monotonic ramping order with <35 μs minimum delay resolution. |
Use Scenario: Coordinated startup of FPGA, DSP, and transceiver power domains on a 3G/4G base station line card. IC Role / Device Role / Timing Role: Cascaded ADM1088AKS-REEL7 units generating timed enable pulses for 12 V analog front-end, 3.3 V digital logic, and 1.2 V core rails. Use Value: Ensures analog sections stabilize before digital clocks engage, avoiding metastability and false lock in RF synthesizers. |
| Graphics Card Multi-Rail Control | Industrial PLC Power Management |
|
Use Scenario: Safe power sequencing for GPU core (0.9 V), memory interface (1.35 V), and PCIe auxiliary (3.3 V) supplies. IC Role / Device Role / Timing Role: Monitoring GPU VDDQ rail via resistor divider on VIN; asserting ENOUT after CEXT-defined delay to enable VRM control logic. Use Value: Eliminates need for complex CPLD-based sequencers - reduces cost and design cycle time while maintaining ±2% timing accuracy over temperature. |
Use Scenario: Controlled power-up of isolated 24 V field I/O, 5 V controller, and 3.3 V communication interface in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Using ENIN to gate sequencing against system watchdog signal; asserting ENOUT only when both watchdog is active and 24 V rail exceeds 0.6 V. Use Value: Adds fail-safe dependency between primary power validation and secondary domain enablement, meeting IEC 61508 functional safety requirements. |
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 | Identical pinout, same 0.6 V threshold and open-drain ENOUT, but documented in Rev. B datasheet as baseline part; ADM1088AKS-REEL7 is functionally identical per Analog Devices' family documentation. | No functional deviation; validated for same desktop, telecom, and graphics applications. | Select ADM1085AKSZ-REEL7 if requiring documented Rev. B revision traceability; otherwise ADM1088AKS-REEL7 offers identical performance in same SC70 package. |
| TPS3808G01DBVR | Fixed 1.0 ms delay (non-adjustable), push-pull output, 0.4 V min threshold; lacks CEXT programmability and 22 V tolerance. | Suitable only for simple single-delay enable scenarios where timing flexibility and high-voltage compatibility are not required. | Choose TPS3808G01DBVR only for cost-sensitive, single-rail applications with stable 3.3 V enable logic; avoid where cascading or 12 V regulator interfacing is needed. |
Compared with ADM1085AKSZ-REEL7, ADM1088AKS-REEL7 offers identical functionality and qualification, while TPS3808G01DBVR trades timing flexibility and voltage range for lower unit cost - making it viable only in non-cascaded, low-voltage, fixed-delay use cases.
Availability
ADM1088AKS-REEL7 is available at Aetrix Electronics and suitable for desktop/notebook computers, telecom line cards, and graphics card power management requiring stable component supply, extended temperature support, and programmable sequencing precision.
Supply support for ADM1088AKS-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, serving industrial, automotive, communications, and healthcare markets.
The ADM1088AKS-REEL7 belongs to Analog Devices' Simple Sequencers® family - purpose-built for deterministic, low-component-count power supply sequencing in space-constrained, multi-rail systems without microcontroller intervention.
FAQ
What is the function of the CEXT pin on the ADM1088AKS-REEL7?
The CEXT pin on the ADM1088AKS-REEL7 connects to an external capacitor that sets the time delay between VIN crossing the 0.6 V threshold and ENOUT assertion. With no capacitor, delay is 35 μs; adding capacitance extends it per tEN = (C × 4.8×10⁶) + 35 μs. This enables precise, passive tuning of sequencing intervals without firmware or additional ICs - a core capability of the ADM1088AKS-REEL7.
Does the ADM1088AKS-REEL7 support cascading with other sequencers?
Yes, the ADM1088AKS-REEL7 supports cascading: its ENOUT can drive the ENIN of a downstream ADM1088AKS-REEL7 (or ADM1085/ADM1087), enabling multi-stage sequencing of four or more power rails. Each stage uses its own CEXT to define independent delays, and all share the same 0.6 V threshold detection - a proven architecture in notebook and line card designs using the ADM1088AKS-REEL7.
What is the maximum voltage the ADM1088AKS-REEL7 ENOUT pin can tolerate?
The ADM1088AKS-REEL7 ENOUT pin is rated for up to 25 V absolute maximum and operates reliably with external pull-up voltages up to 22 V. This allows direct interfacing with high-voltage enable inputs of DC/DC controllers (e.g., 12 V or 15 V rails) without level shifters - a key specification confirmed in the Absolute Maximum Ratings table of the ADM1088AKS-REEL7 datasheet.
Can the ADM1088AKS-REEL7 monitor a 0.85 V supply directly?
Yes - the ADM1088AKS-REEL7 monitors voltages as low as 0.6 V using its internal reference. To monitor a 0.85 V rail, connect it directly to VIN; the 0.6 V threshold ensures reliable detection with 250 mV margin. For rails below 0.6 V (e.g., 0.5 V), use an external resistor divider to scale the voltage upward - a method validated in ADM1088AKS-REEL7 application circuits.
Is the ADM1088AKS-REEL7 pin-compatible with the ADM1085AKSZ-REEL7?
Yes, the ADM1088AKS-REEL7 is pin-compatible with the ADM1085AKSZ-REEL7: both use identical 6-lead SC70 (KS-6) packaging, share identical pin functions (ENIN, GND, VIN, ENOUT, CEXT, VCC), and exhibit matching electrical specifications including 0.6 V threshold, 22 V tolerance, and open-drain output. This interchangeability is confirmed across Analog Devices' family documentation and ordering guide.
ADM1088AKS-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:
- -
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
ADM1088AKS-REEL7 FAQ
1.How can I place an order for ADM1088AKS-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1088AKS-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 ADM1088AKS-REEL7 reliable?
The price and inventory of ADM1088AKS-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1088AKS-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM1088AKS-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1088AKS-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1088AKS-REEL7?
ADM1088AKS-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1088AKS-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 ADM1088AKS-REEL7?
For technical support, including ADM1088AKS-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1088AKS-REEL7 requirements.
6.How does Aetrix verify that ADM1088AKS-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM1088AKS-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 ADM1088AKS-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM1088AKS-REEL7?
All ADM1088AKS-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1088AKS-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 ADM1088AKS-REEL7 part is unused and in its original packaging.
Return procedure for ADM1088AKS-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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