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Renesas ISL28023FR12Z
- Part No.:
- ISL28023FR12Z
- Manufacturer:
- Renesas
- Category:
- Power Supply Controllers, Monitors
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ISL28023FR12Z.pdf
- Description:
- IC VOLT MONITOR PRECISION 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:842
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Product details
Overview
ISL28023FR12Z from Renesas Electronics is a precision bidirectional digital power monitor IC for high-side and low-side current/voltage sensing with PMBus/I²C interface, 0.05% voltage/current gain error, ±81.91mV shunt range, 0–16.384V bus voltage range, and integrated 8-bit margining DAC - deployed in DC/DC converter output voltage trimming and fault monitoring for telecom and industrial power systems.
For engineers reviewing the ISL28023FR12Z datasheet, ISL28023FR12Z pinout, ISL28023FR12Z application, or ISL28023FR12Z equivalent, key selection considerations include its 24-lead QFN package, -40°C to +125°C operation, 0.25mV VBUS LSB resolution, dual-channel (primary + auxiliary) sensing capability, and fast 500ns overcurrent fault detection.
Technical Context
The ISL28023FR12Z implements a 16-bit delta-sigma ADC with programmable averaging (up to 128 samples), supports both differential (VINP/VINM) and single-ended (AUXV) auxiliary inputs, and features independent threshold detectors for bus voltage window, overcurrent, and overtemperature faults with configurable full-scale ranges specific to the FR12Z variant (e.g., VBUS OV thresholds from 0.625V to 12V).
Its internal 3.3V regulator accepts 4.5–60V input at VREG_IN and supplies regulated power to internal circuitry; the I²C/SMBus/PMBus interface operates down to 1.2V on I2CVCC and supports standard-mode (400kHz) clocking with PEC support, while the 8-bit DAC provides programmable voltage margining with 0.4–1.2V mid-scale options depending on DAC_MS configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bus Voltage Range | 0V to 16.384V - matches 12V rail monitoring with 0.25mV LSB resolution for fine-grained telemetry |
| Voltage Gain Error | ±0.05% - enables sub-1mV absolute accuracy at 12V bus for closed-loop power management |
| Current Gain Error | ±0.05% - ensures precise shunt-based current measurement across temperature (-40°C to +125°C) |
| Shunt Voltage Range | ±81.91mV - supports high-accuracy bidirectional current sensing with 2.5µV LSB step size |
| DAC Resolution | 8-bit - delivers 256-step voltage margining control for DC/DC output adjustment and margin testing |
| Fault Detection Delay | 500ns - enables ultra-fast overcurrent response for protecting downstream FETs and converters |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive, base station, and industrial embedded environments |
| Package | 24-lead QFN 4mm × 4mm - surface-mount footprint compatible with automated assembly and thermal pad grounding |
Pinout & Package
ISL28023FR12Z is housed in a RoHS-compliant 24-lead QFN package (4mm × 4mm, L24.4x4D) with exposed thermal pad. Pin functions are validated per Renesas FN8389 Rev.6.03, Page 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINP / VINM | Primary differential shunt input | Measures bidirectional current via external sense resistor; common-mode range up to 16.384V |
| VBUS | Bus voltage sense input | Direct high-impedance (150kΩ) monitoring of supply rail; 0–16.384V full-scale range |
| AUXP / AUXM / AUXV | Auxiliary analog inputs | Support secondary current/voltage monitoring or external temperature diode connection |
| DAC_OUT | Analog voltage output | 8-bit programmable margining output (0.055V to 2×VMS); drives DC/DC feedback node directly |
| SMBCLK / SMBDAT | PMBus/I²C interface | Standard 400kHz SMBus-compatible serial bus; supports 1.2V–5.5V I2CVCC level shifting |
| SMBALERT1 / SMBALERT2 | Open-drain fault outputs | Asynchronous interrupt signals for OV/UV/OC/OT events; SMBALERT2 serves as CPU interrupt |
| VREG_IN / VREG_OUT | Internal regulator interface | VREG_IN accepts 4.5–60V input; VREG_OUT supplies 3.3V ±1.5% to internal logic and ADC |
| A0–A2 | I²C address inputs | Set slave address (up to 55 unique addresses); enable multi-device bus configurations |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional current sensing | Enables real-time charge/discharge monitoring in battery management and regenerative systems |
| Integrated 3.3V regulator | Eliminates need for external LDO when VREG_IN is connected to 4.5–60V system rail |
| Fast 500ns fault detection | Provides hardware-level protection response before controller loop can react |
| Programmable averaging modes | Reduces noise impact without sacrificing update rate - selectable 1x to 128x oversampling |
| Internal temperature sensor | +1.0°C accuracy at +25°C enables on-die thermal derating without external components |
| PMBus v1.2 compliance | Supports standardized commands (READ_VIN, READ_IOUT, MARGIN_HIGH/LOW) for interoperability |
Applications
| Telecom Power Distribution | Data Center Server Rails |
|---|---|
Use Scenario: Monitoring 12V intermediate distribution bus in 48V-to-12V DC/DC modules within 5G base stations. IC Role / Device Role / Timing Role: Primary channel measures bus voltage and shunt current; auxiliary channel monitors local 3.3V LDO output. Use Value: 0.05% gain error ensures accurate power calculation for dynamic load profiling and efficiency reporting. | Use Scenario: Real-time telemetry of 12V VRM output in AI accelerator server blades with strict thermal budgets. IC Role / Device Role / Timing Role: ISL28023FR12Z performs simultaneous voltage/current/power readback and triggers SMBALERT2 on overcurrent. Use Value: 500ns fault detection enables immediate shutdown before MOSFET SOA violation occurs. |
| Industrial Motor Drives | Automotive ADAS ECUs |
Use Scenario: Sensing gate driver supply current and bus voltage in servo amplifier power stages. IC Role / Device Role / Timing Role: High-side sensing via VINP/VINM; DAC_OUT adjusts reference voltage for current limit scaling. Use Value: 8-bit DAC allows software-controlled margining during production test and field calibration. | Use Scenario: Monitoring 12V battery-fed power rails in radar control units operating at -40°C to +125°C. IC Role / Device Role / Timing Role: ISL28023FR12Z senses VBUS and shunt current while internal temp sensor validates die temperature. Use Value: Guaranteed operation across full industrial temp range eliminates need for external thermal compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital power monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL28023FR60Z | Same IC core, but rated for 0–60V VBUS range (1mV LSB) and higher CMRR at 60V common-mode | Targeted at 48V telecom and industrial HV systems; not suitable for 12V-optimized designs requiring 0.25mV resolution | Select FR60Z only if VBUS exceeds 16.384V; FR12Z offers superior LSB resolution for 12V rails |
| INA226AIDGST | TI part with 16-bit ADC, 0.1% gain error, no integrated DAC or internal regulator; requires external 3.3V supply | Lacks margining capability and autonomous fault alert outputs; relies on host MCU for threshold evaluation | Choose INA226 where cost sensitivity outweighs need for autonomous margining and fast hardware fault response |
Compared with ISL28023FR60Z and INA226AIDGST, the ISL28023FR12Z uniquely combines 12V-optimized resolution (0.25mV), integrated 3.3V regulation, and hardware-accelerated margining - reducing BOM count and firmware overhead in compact 12V power systems.
Availability
ISL28023FR12Z is available at Aetrix Electronics and suitable for telecom power distribution, data center server rails, and industrial motor drive applications requiring stable component supply across extended temperature operation and long product lifecycles.
Supply support for ISL28023FR12Z 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
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and infrastructure markets.
The ISL28023 product line delivers precision digital power monitoring with integrated margining and fault detection - designed specifically for high-reliability 12V and 48V power systems in telecom, computing, and industrial equipment.
FAQ
What is the maximum bus voltage range supported by the ISL28023FR12Z?
The ISL28023FR12Z supports a bus voltage measurement range of 0V to 16.384V, with 0.25mV LSB resolution. This range is optimized for 12V power rails and differs from the ISL28023FR60Z variant, which supports 0–60V. The 16.384V limit is defined by the internal scaling and full-scale register settings, and exceeding it may cause saturation or inaccurate readings.
Does the ISL28023FR12Z require an external voltage regulator?
No, the ISL28023FR12Z integrates a 3.3V internal regulator that accepts 4.5–60V input at VREG_IN and delivers regulated power to internal circuitry via VREG_OUT. When using the internal regulator, connect VREG_IN to the system rail and place a 1µF decoupling capacitor on VREG_OUT. External regulation is optional and only needed if VREG_IN is grounded or unused.
How does the 8-bit DAC in the ISL28023FR12Z function for voltage margining?
The ISL28023FR12Z's 8-bit DAC generates a programmable analog output (DAC_OUT) ranging from 0.055V to 2×VMS, where VMS is selectable between 0.4V and 1.2V via DAC_MS[2:0]. It directly interfaces with DC/DC converter feedback nodes to implement precise output voltage margining (e.g., ±5%) during production test or runtime calibration without host MCU intervention.
What fault detection capabilities does the ISL28023FR12Z provide, and how fast are they?
The ISL28023FR12Z provides hardware-accelerated overvoltage, undervoltage, overcurrent, and overtemperature detection with a fixed 500ns propagation delay from fault condition to SMBALERT1/SMBALERT2 assertion. Thresholds are independently configurable per channel, and detection operates autonomously - no host polling or firmware execution required.
Can the ISL28023FR12Z monitor both primary and auxiliary channels simultaneously?
Yes, the ISL28023FR12Z supports concurrent monitoring of its primary channel (VINP/VINM/VBUS) and auxiliary channel (AUXP/AUXM/AUXV). Each channel has independent gain, offset, averaging, and conversion timing controls. The device reports all measurements via PMBus registers, enabling synchronized power telemetry across multiple rails or subsystems in a single IC.
ISL28023FR12Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Digital Power Monitor
- Voltage - Input:
- 0V ~ 60V
- Voltage - Supply:
- 3V ~ 5.5V
- Current - Supply:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
ISL28023FR12Z FAQ
1.How can I place an order for ISL28023FR12Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL28023FR12Z 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 ISL28023FR12Z reliable?
The price and inventory of ISL28023FR12Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL28023FR12Z is usually 5 days.
3.What payment methods are accepted for ISL28023FR12Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL28023FR12Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL28023FR12Z?
ISL28023FR12Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL28023FR12Z 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 ISL28023FR12Z?
For technical support, including ISL28023FR12Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL28023FR12Z requirements.
6.How does Aetrix verify that ISL28023FR12Z is sourced from the original manufacturer or authorized distributors?
All ISL28023FR12Z 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 ISL28023FR12Z meets industry standards.
7.What is the process for return or replacement of ISL28023FR12Z?
All ISL28023FR12Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL28023FR12Z, 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 ISL28023FR12Z part is unused and in its original packaging.
Return procedure for ISL28023FR12Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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