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Renesas ISL9238CIRTZ
- Part No.:
- ISL9238CIRTZ
- Manufacturer:
- Renesas
- Category:
- Battery Chargers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
ISL9238CIRTZ.pdf
- Description:
- IC BATT CHG LI-ION 2-4CEL 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,450
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Product details
Overview
ISL9238CIRTZ from Renesas Electronics is a buck-boost Narrow Output Voltage DC (NVDC) battery charger IC for 2- to 4-cell Li-ion systems, supporting input voltage range of 3.9V–23.4V, system output regulation from 2.4V–18.304V, and up to 1MHz switching frequency. It delivers autonomous charging, PSYS-based platform power monitoring, and reverse buck/boost operation in USB-C portable devices such as Ultrabooks and power banks.
For engineers reviewing the ISL9238CIRTZ datasheet, ISL9238CIRTZ pinout, ISL9238CIRTZ application, or ISL9238CIRTZ equivalent, key selection considerations include NVDC topology support, IMVP-compliant PSYS/PROCHOT# signaling, SMBus/I²C programmability, adapter/battery current monitoring (AMON/BMON), and 4×4 32-lead TQFN package compatibility.
Technical Context
The ISL9238CIRTZ implements a four-switch buck-boost converter with R3™ technology for high light-load efficiency and fast transient response. It supports forward charging, pass-through mode, and reverse power delivery (OTG) from battery to input port across 2–4 cell configurations.
Its dual-phase architecture enables seamless transitions between adapter-only, battery-only, and hybrid power sources while maintaining tight system bus regulation. The integrated PSYS analog output and PROCHOT# signal provide real-time platform power telemetry and thermal throttling coordination for Intel IMVP-compliant systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Four-switch buck-boost with NVDC control for stable system bus voltage independent of battery state |
| Input Voltage Range | 3.9V–23.4V DC - no dead zone, supports USB PD, travel adapters, and legacy AC/DC sources |
| System Output Range | 2.4V–18.304V - programmable via SMBus/I²C for flexible platform rail requirements |
| Switching Frequency | Up to 1MHz - enables compact external magnetics and faster load transient recovery |
| Battery Support | 2-, 3-, or 4-series Li-ion - includes trickle charge for depleted cells and ship mode control |
| Interface | SMBus and auto-increment I²C - allows full configuration of charge parameters, limits, and status reporting |
| Safety Certifications | UL2367 and IEC 62368-1 certified - meets end-product safety compliance for portable electronics |
Pinout & Package
ISL9238CIRTZ is housed in a 4×4 mm, 32-lead TQFN package with exposed thermal pad (RTZ suffix). Pin functions are defined per Renesas R16DO0009EU0203 Rev.2.03.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DCIN | Primary input supply | Accepts 3.9V–23.4V adapter input; feeds buck-boost power stage |
| VBAT | Battery connection | Direct interface to 2–4S Li-ion pack; supports reverse buck/boost for OTG |
| VSYS | Regulated system output | Delivers narrow-range DC output (2.4V–18.304V) to SoC/platform rails |
| PSYS | Platform power monitor | Analog output proportional to total system power; IMVP-compliant for CPU power domain control |
| PROCHOT# | Thermal alert signal | Open-drain output asserted during thermal throttling; compatible with Intel IMVP platforms |
| SCL/SDA | I²C/SMBus interface | Two-wire serial bus for real-time parameter programming and fault reporting |
| AMON/BMON | Current monitor outputs | Separate analog signals for adapter input current and battery current sensing |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous charging | Full charge cycle completion without host intervention, including pre-charge, constant-current, and constant-voltage phases |
| Pass-Through mode | Direct adapter-to-system power path with minimal voltage drop and loss, bypassing battery during high-load conditions |
| Ideal diode control in Turbo mode | Enables low-loss conduction path during high-current system loads by optimizing FET gate drive timing |
| Two-level adapter current limit | Configurable primary current thresholds for robust overcurrent protection under varying source capabilities |
| Battery Ship mode | Ultra-low quiescent current state (<1μA) to preserve battery charge during long-term storage or shipping |
Applications
| Ultrabook Power Management | USB-C Power Bank |
|---|---|
Use Scenario: Dual-input (adapter + battery) power management in thin-and-light Windows laptops with Intel IMVP processors. IC Role / Device Role / Timing Role: Primary NVDC charger and system bus regulator with PSYS/PROCHOT# telemetry for CPU power domain coordination. Use Value: Maintains stable VSYS rail during dynamic load shifts and enables accurate platform power budgeting via PSYS analog output. | Use Scenario: Bi-directional USB-C power bank supporting both charging from PD sources and discharging to downstream devices. IC Role / Device Role / Timing Role: Buck-boost controller enabling reverse power delivery (OTG) and adaptive charge termination based on battery cell count. Use Value: Eliminates need for separate boost and buck controllers; single-chip solution reduces BOM cost and PCB area by 35% vs discrete alternatives. |
| Tablet System Power | Convertible Notebook |
Use Scenario: High-efficiency power delivery in fanless Android/iOS tablets requiring extended runtime and thermal headroom. IC Role / Device Role / Timing Role: System-side regulator with adaptive light-load efficiency (R3™) and trickle-charge capability for deeply discharged batteries. Use Value: Extends usable battery capacity by 8–12% through optimized low-power operation and supports cold-weather startup down to –20°C. | Use Scenario: Hybrid power architecture in 2-in-1 notebooks that switch between laptop and tablet modes with variable thermal envelopes. IC Role / Device Role / Timing Role: Dynamic power path manager coordinating adapter, battery, and system rail with real-time AMON/BMON current feedback. Use Value: Enables precise thermal throttling decisions using PROCHOT# and PSYS signals, improving sustained performance by 15% under mixed workloads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost NVDC charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| bq25792RTWR | Single-input buck-boost with integrated ADC; lacks PSYS analog output and IMVP-specific PROCHOT# timing | Targeted at generic USB-C PD devices without Intel platform integration | Preferred when full IMVP telemetry is not required and higher-resolution battery gauging is prioritized |
| MP2722GQ-Z | Supports 1–4S Li-ion but uses proprietary I²C command set; no UL2367 certification | Used in cost-sensitive consumer electronics where safety certification is handled at system level | Consider when BOM cost is critical and platform-level safety compliance can be achieved externally |
Compared with bq25792RTWR and MP2722GQ-Z, the ISL9238CIRTZ uniquely combines IMVP-compliant PSYS/PROCHOT# signaling, UL2367 certification, and true dual-source (adapter + battery) power path arbitration-making it the only option qualified for Intel reference designs in Ultrabooks and convertible notebooks.
Availability
ISL9238CIRTZ is available at Aetrix Electronics and suitable for Ultrabooks, USB-C power banks, and convertible notebooks requiring stable component supply, long-lifecycle support, and IMVP platform compliance.
Supply support for ISL9238CIRTZ 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 Corporation is a global semiconductor leader headquartered in Tokyo, Japan, specializing in microcontrollers, analog power management, and automotive SoCs.
The ISL9238CIRTZ belongs to Renesas' ISL92xx family of high-efficiency battery chargers designed specifically for USB-C–enabled portable computing platforms with strict IMVP, safety, and thermal requirements.
FAQ
What is the function of the PSYS pin on the ISL9238CIRTZ?
The PSYS pin on the ISL9238CIRTZ provides an analog voltage output proportional to total system power consumption, enabling real-time platform power telemetry. This signal is IMVP-compliant and interfaces directly with Renesas core regulators and Intel CPU power domains. In ISL9238CIRTZ designs, PSYS allows dynamic power budgeting and coordinated thermal management without host processor intervention.
Does the ISL9238CIRTZ support reverse power delivery (OTG) from battery to input port?
Yes, the ISL9238CIRTZ supports reverse buck, boost, and buck-boost operation from the battery to the DCIN port, enabling USB On-The-Go functionality. This capability allows the device to act as a power source for external peripherals or chargers. The ISL9238CIRTZ maintains regulation and protection during reverse operation, with configurable current limits and seamless transition logic between forward and reverse modes.
What battery configurations does the ISL9238CIRTZ support?
The ISL9238CIRTZ supports 2-, 3-, and 4-series Li-ion battery packs, with automatic detection and configuration via SMBus/I²C registers. It includes dedicated trickle-charge circuitry for deeply depleted cells and battery ship mode with sub-1μA quiescent current. Each configuration is validated for voltage range, charge termination accuracy, and safety timer compliance per JEITA standards.
Is the ISL9238CIRTZ pin-compatible with earlier ISL9238 variants?
No, the ISL9238CIRTZ is not pin-compatible with prior ISL9238 versions such as ISL9238HIRTZ or ISL9238IRTZ due to functional enhancements including updated PSYS scaling, revised PROCHOT# assertion timing, and modified AMON/BMON gain calibration. Board-level redesign is required to migrate to ISL9238CIRTZ, though firmware register mapping remains backward-compatible within the ISL9238C family.
What safety certifications apply to the ISL9238CIRTZ?
The ISL9238CIRTZ is certified to UL2367 and IEC 62368-1 safety standards, with file number E520109. These certifications validate its internal protection architecture-including overvoltage, overcurrent, overtemperature, and short-circuit safeguards-for use in end-user portable electronics. Certification applies to the ISL9238CIRTZ device itself, not system-level implementation.
ISL9238CIRTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 2 ~ 4
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current
- Fault Protection:
- Over Current, Over Temperature
- Charge Current - Max:
- -
- Battery Pack Voltage:
- 2.4V ~ 18.304V
- Voltage - Supply (Max):
- 23.4V
- Interface:
- I2C, SMBus
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN (4x4)
ISL9238CIRTZ FAQ
1.How can I place an order for ISL9238CIRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9238CIRTZ 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 ISL9238CIRTZ reliable?
The price and inventory of ISL9238CIRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9238CIRTZ is usually 5 days.
3.What payment methods are accepted for ISL9238CIRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9238CIRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9238CIRTZ?
ISL9238CIRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9238CIRTZ 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 ISL9238CIRTZ?
For technical support, including ISL9238CIRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9238CIRTZ requirements.
6.How does Aetrix verify that ISL9238CIRTZ is sourced from the original manufacturer or authorized distributors?
All ISL9238CIRTZ 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 ISL9238CIRTZ meets industry standards.
7.What is the process for return or replacement of ISL9238CIRTZ?
All ISL9238CIRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL9238CIRTZ, 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 ISL9238CIRTZ part is unused and in its original packaging.
Return procedure for ISL9238CIRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL9238CIRTZ Tags
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