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Renesas ISL6131IRZA
- Part No.:
- ISL6131IRZA
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ISL6131IRZA.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,803
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Product details
Overview
ISL6131IRZA from Intersil is a quad undervoltage supervisory IC designed to monitor four independent supply rails (>0.7V) in microprocessor and industrial power systems. It features four resistor-programmable VMON inputs, individual open-drain STATUS outputs per channel, a Boolean AND PGOOD output, 160ms stability delay, and guaranteed valid operation with VDD <1V.
For engineers reviewing the ISL6131IRZA datasheet, ISL6131IRZA pinout, ISL6131IRZA application, or ISL6131IRZA equivalent, this page delivers verified specifications, real-world sequencing and voltage monitoring use cases, validated pin functions, and confirmed alternative parts for multi-rail system power integrity design.
Technical Context
The ISL6131IRZA implements four independent voltage comparators referenced to a precision 0.633V internal bandgap, each with 30µs glitch immunity and programmable thresholds via external resistor dividers. Its EN input enables/disables monitoring globally, and all STATUS/PGOOD outputs are open-drain with guaranteed validity down to VDD = 0.91V (lock-out) and functional operation below 1V.
It operates across 1.5V–5.5V supply range and -40°C to +85°C ambient, with thermal pad (PD) tied to GND for enhanced thermal performance in the 4mm × 4mm QFN package. The 160ms delay ensures stable rail qualification before asserting STATUS and PGOOD, preventing false resets during power-up transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 1.5V to 5.5V - supports bias from low-voltage logic up to standard industrial rails |
| VMON Threshold | 633 mV ±14 mV at +25°C - precise reference enabling accurate trip points for 1.2V–12V supplies |
| Stability Delay | 160 ms - ensures monitored supplies settle before STATUS/PGOOD assertion, critical for reliable sequencing |
| VMON Glitch Filter | 30 µs - rejects short transients on supply lines without triggering false fault signals |
| STATUS/PGOOD Validity | Functional down to VDD <1V - guarantees clean reset signaling during brown-out and power-down transitions |
| Supply Current | 100 µA at 1.5V - ultra-low quiescent current preserves battery life in portable equipment |
| Package | 24-lead 4mm × 4mm QFN (JEDEC MO-220, L24.4x4) - compact footprint with exposed thermal pad for PCB thermal management |
Pinout & Package
ISL6131IRZA uses a 24-lead 4mm × 4mm QFN package (JEDEC MO-220, drawing L24.4x4) with an exposed thermal pad (PD) that must be electrically connected to GND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 23) | Bias supply input | Accepts 1.5V–5.5V; powers internal circuitry and defines logic high level for open-drain outputs |
| GND (Pin 10) | Reference ground | Common return path for all VMON dividers and internal comparators; ties to thermal pad (PD) |
| VMON_A–D (Pins 12,17,14,20) | Undervoltage monitor inputs | Each compares external resistor-divided voltage to 0.633V reference; 30µs glitch immunity prevents false trips |
| STATUS_A–D (Pins 2,5,6,7) | Per-channel fault indicators | Open-drain outputs pulled high externally; assert low when corresponding VMON falls below threshold |
| PGOOD (Pin 24) | System-level power-good signal | Open-drain AND of all four STATUS outputs; asserts high only when all four rails are valid |
| EN (Pin 1) | Global enable control | Internally pulled up to VDD; drives all monitoring functions low when asserted low |
| PD (Thermal Pad) | Thermal and electrical ground | Exposed copper pad on underside; must be soldered to GND plane for thermal dissipation and noise reduction |
Key Features
| Feature | Design Value |
|---|---|
| Four independent UV monitors | Enables simultaneous validation of 12V, 5V, 3.3V, and 1.2V rails using single IC-reduces BOM count vs. discrete supervisors |
| 160ms stabilization timer | Prevents premature PGOOD assertion during supply ramp-up, ensuring downstream logic receives stable power before initialization |
| VDD lock-out (0.91V) | Guarantees clean reset behavior during brown-out by holding STATUS/PGOOD low until VDD exceeds safe operating threshold |
| Open-drain STATUS/PGOOD | Allows wired-OR connection of multiple supervisors and interface to any logic family (1.2V–5.5V) via external pull-up |
| Glitch-immune VMON inputs | 30µs filtering eliminates false triggers from switching noise or brief supply dips-critical in DC-DC converter environments |
Applications
| Processor Power Sequencing | Industrial PLC Power Monitoring |
|---|---|
|
Use Scenario: Coordinating turn-on order of multiple DC-DC converters supplying CPU core, I/O, memory, and peripheral rails. IC Role / Device Role / Timing Role: ISL6131IRZA acts as a lossless sequencer-STATUS_A enables DC-DC_B only after VIN and STATUS_A stabilize, repeating per rail. Use Value: Eliminates need for external timers or FPGA-based sequencing logic; 160ms delay ensures each rail reaches regulation before next stage activates. |
Use Scenario: Continuous supervision of 24V, 12V, 5V, and 3.3V supplies powering PLC I/O modules, communication interfaces, and controller logic. IC Role / Device Role / Timing Role: ISL6131IRZA provides per-rail STATUS flags and system-wide PGOOD to trigger watchdog reset or SCADA alarm on any undervoltage event. Use Value: Single-chip solution replaces four discrete supervisors, reducing board area and improving fault isolation in harsh industrial environments. |
| Graphics Card Voltage Validation | Medical Imaging System Power Integrity |
|
Use Scenario: Verifying GPU core (1.0V), memory (1.35V), I/O (3.3V), and auxiliary (5V) rails meet specification before GPU initialization. IC Role / Device Role / Timing Role: ISL6131IRZA's four VMON inputs monitor each rail independently; PGOOD enables GPU clock only when all are valid. Use Value: Prevents GPU lockup or corruption due to marginal rail conditions; open-drain outputs interface directly to GPU's reset controller. |
Use Scenario: Ensuring stable power to FPGA, ADC, sensor front-end, and display subsystems in MRI or ultrasound equipment. IC Role / Device Role / Timing Role: ISL6131IRZA validates 1.8V (FPGA core), 3.3V (ADC reference), 5V (sensor bias), and 12V (motor driver) rails before system boot. Use Value: Meets medical safety requirements for fail-safe power monitoring; guaranteed VDD <1V operation ensures deterministic reset during AC loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad undervoltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3307-33DGNR | Triple-supply supervisor (3 channels); fixed 3.3V, 5V, and adjustable thresholds; no 160ms delay timer | Lacks fourth monitor and programmable delay-requires external timing circuit for sequencing | Choose if only three rails need monitoring and fixed thresholds suffice; lower cost but less flexible than ISL6131IRZA |
| MAX6816EAP+ | Quad UV supervisor with 200ms delay; higher supply current (250µA at 3.3V); no VDD <1V guarantee | Higher quiescent current limits battery life; lacks sub-1V PGOOD validity for deep brown-out detection | Prefer where longer delay tolerance is acceptable and ultra-low-power brown-out response is not required |
Compared with TPS3307-33DGNR and MAX6816EAP+, the ISL6131IRZA uniquely combines four fully programmable UV monitors, 160ms stabilization, guaranteed sub-1V operation, and 4×4mm QFN packaging-making it optimal for space-constrained, multi-rail sequencing in portable and industrial systems.
Availability
ISL6131IRZA is available at Aetrix Electronics and suitable for processor power sequencing, industrial PLC monitoring, graphics card voltage validation, and medical imaging system power integrity requiring stable component supply across extended temperature ranges.
Supply support for ISL6131IRZA 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
Intersil Corporation designs high-performance analog, mixed-signal, and power management semiconductors for industrial, computing, and consumer markets.
The ISL6131IRZA belongs to Intersil's multi-voltage supervisory IC product line, engineered specifically for reliable, low-power, multi-rail power-up validation and sequencing in embedded and infrastructure systems.
FAQ
What is the primary function of the ISL6131IRZA?
The ISL6131IRZA is a quad undervoltage supervisory IC that independently monitors four voltage rails using external resistor dividers. It asserts individual STATUS outputs and a system-level PGOOD signal only after all monitored voltages remain above their programmed thresholds for 160ms. This ensures robust power sequencing and fault detection in microprocessor and industrial power systems. The ISL6131IRZA is explicitly designed for undervoltage-only monitoring, distinguishing it from dual OV/UV devices like the ISL6132.
How does the ISL6131IRZA handle power-up sequencing?
The ISL6131IRZA enables "lossless" sequencing by using its STATUS outputs to enable subsequent DC-DC converters-e.g., STATUS_A enables DC-DC_B only after VMON_A confirms stable input voltage. Its 160ms delay ensures each rail reaches regulation before the next stage activates. The ISL6131IRZA's open-drain outputs allow direct connection to enable pins, eliminating need for external logic. This capability is documented in Figure 7 and Applications section of the FN9119 datasheet.
Can the ISL6131IRZA monitor negative voltages?
Yes-the ISL6131IRZA can monitor negative supplies because its VMON inputs detect any voltage more positive than its GND pin. By referencing the negative rail to GND and biasing VDD appropriately, the device monitors -12V, -5V, or other negative rails. This configuration is explicitly supported and described in the "Negative Voltage Monitoring Applications" section (Page 7) of the FN9119 datasheet, confirming functional compatibility beyond positive-only use cases.
What is the significance of the 30µs glitch filter on VMON inputs?
The 30µs glitch filter on each VMON input prevents transient noise-such as switching spikes from DC-DC converters-from falsely triggering undervoltage faults. This ensures STATUS and PGOOD remain stable during normal operation, avoiding spurious resets. The filter time is precisely specified in the Electrical Specifications table (Page 4) and validated in Figures 21–23 of the FN9119 datasheet, confirming immunity to sub-30µs disturbances.
Does the ISL6131IRZA require external pull-up resistors on its outputs?
Yes-both STATUS and PGOOD outputs are open-drain and require external pull-up resistors to a logic-compatible voltage (≤VDD). Typical values range from 4.7kΩ to 10kΩ, selected based on rise-time and bus loading requirements. This architecture allows wired-OR connection of multiple supervisors and interface to diverse logic families. The necessity and implementation are detailed in Pin Descriptions (Page 2) and Figure 1 of the FN9119 datasheet.
ISL6131IRZA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
ISL6131IRZA FAQ
1.How can I place an order for ISL6131IRZA through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6131IRZA 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 ISL6131IRZA reliable?
The price and inventory of ISL6131IRZA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6131IRZA is usually 5 days.
3.What payment methods are accepted for ISL6131IRZA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6131IRZA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6131IRZA?
ISL6131IRZA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6131IRZA 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 ISL6131IRZA?
For technical support, including ISL6131IRZA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6131IRZA requirements.
6.How does Aetrix verify that ISL6131IRZA is sourced from the original manufacturer or authorized distributors?
All ISL6131IRZA 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 ISL6131IRZA meets industry standards.
7.What is the process for return or replacement of ISL6131IRZA?
All ISL6131IRZA units undergo pre-shipment inspection (PSI). If there is an issue with ISL6131IRZA, 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 ISL6131IRZA part is unused and in its original packaging.
Return procedure for ISL6131IRZA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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