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Renesas ISL9237IRZR5700
- Part No.:
- ISL9237IRZR5700
- Manufacturer:
- Renesas
- Category:
- Battery Chargers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL9237IRZR5700.pdf
- Description:
- IC BATT CHG LI-ION 1-3CELL 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,984
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Product details
Overview
ISL9237IRZR5700 from Renesas (formerly Intersil) is a buck-boost narrow VDC battery charger IC for 1–3-cell Li-ion systems, featuring SMBus/I²C programmability, USB OTG reverse-buck operation, IMVP-8-compliant PSYS and PROCHOT# outputs, and R3™ modulator architecture enabling high light-load efficiency and seamless DCM/CCM transitions in mobile power management.
For engineers reviewing the ISL9237IRZR5700 datasheet, ISL9237IRZR5700 pinout, ISL9237IRZR5700 application, or ISL9237IRZR5700 equivalent, key selection criteria include NVDC system voltage regulation (2.4–13.824 V), adapter input range (3.2–23.4 V), dual current monitoring (AMON/BMON), OTG enable logic, and 4×4 mm 32-pin QFN thermal performance.
Technical Context
The ISL9237IRZR5700 implements a four-switch buck-boost topology with integrated gate drivers for Q1–Q4 MOSFETs, supporting simultaneous charging and system power delivery from adapter, battery, or both. Its R3™ modulator enables adaptive frequency control up to 1 MHz and fast transient response without external compensation.
It integrates dual differential current-sense amplifiers (AMON for adapter, BMON for battery discharge), programmable PROCHOT# thresholds for adapter/battery overcurrent, and dedicated analog outputs: PSYS (platform power monitor), BGATE (battery FET control), and OTGPG/CMOUT (OTG power-good or comparator output).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Four-switch buck-boost with R3™ modulator for seamless mode transitions and high efficiency at light load. |
| Input Voltage Range | 3.2 V to 23.4 V - supports wide-input DC sources including USB PD, travel adapters, and legacy AC/DC supplies without dead zone. |
| System Output Range | 2.4 V to 13.824 V - narrow-VDC regulation ensures stable bus voltage across 1–3-cell battery configurations. |
| Switching Frequency | Up to 1 MHz - programmable via PROG pin; enables compact LC filter design and high transient response. |
| Current Monitoring | AMON (adapter) and BMON (battery discharge) outputs with 17.9x gain and ±2% accuracy at full scale - enables precise platform power budgeting and safety enforcement. |
| USB OTG Support | Reverse-buck operation delivering regulated 5 V at USB port when enabled - requires battery ≥5.8 V and OTGEN pin asserted; uses same power stage as charge path. |
| IMVP-8 Compliance | PSYS analog current-source output and open-drain PROCHOT# with configurable thresholds - directly interfaces with Intel core regulators for thermal/power throttling. |
Pinout & Package
Package: 32-lead 4 mm × 4 mm QFN (RoHS-compliant, exposed thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Bottom Pad) | Signal and thermal reference | Primary ground return and heat dissipation path; must be soldered to PCB thermal plane. |
| CSOP / CSON | Battery current sense inputs (+/−) | Differential pair for battery charge/discharge current measurement; requires 0.1 µF ceramic filter capacitor. |
| CSIP / CSIN | Adapter current sense inputs (+/−) | Differential pair for adapter input current monitoring; also used for input/output voltage sensing in forward/reverse modes. |
| UGATE1 / LGATE1 / PHASE1 / BOOT1 | High-/low-side gate drive for Q1/Q2 | Controls first buck-boost phase; BOOT1 supplies gate driver for UGATE1 via internal boot diode and external capacitor. |
| UGATE2 / LGATE2 / PHASE2 / BOOT2 | High-/low-side gate drive for Q3/Q4 | Controls second buck-boost phase; independent bootstrap supply enables synchronous 4-switch operation. |
| BGATE | Battery disconnect FET gate driver | Drives external P-channel FET between battery and system; supports ideal diode mode and linear trickle charge regulation. |
| ASGATE | Adapter-side FET gate driver (optional) | Drives optional P-channel adapter FET; clamped to 10 V below ADP voltage when active. |
| OTGEN/CMIN | OTG enable / comparator input | Pull-high to enable OTG; otherwise functions as general-purpose comparator input with hysteresis. |
| OTGPG/CMOUT | OTG power-good / comparator output | Open-drain indicator: low when OTG output is out of regulation; or comparator output when OTGEN unused. |
| PSYS | Platform power monitor output | Current-source output proportional to total system power; IMVP-8 compliant for CPU power domain coordination. |
| PROCHOT# | Thermal/power throttling signal | Open-drain output pulled low on adapter overcurrent, battery over-discharge, or low VSYS event - triggers host processor throttling. |
| SCL / SDA | SMBus/I²C interface | Two-wire serial interface for programming charge limits, voltages, PROCHOT# thresholds, and OTG parameters. |
Key Features
| Feature | Design Value |
|---|---|
| NVDC System Regulation | Maintains stable VSYS across varying battery state-of-charge and adapter availability - eliminates brownouts during adapter insertion/removal. |
| Programmable Dual Current Limits | Independent adapter and battery charge current limits set via SMBus registers - enables dynamic power allocation in multi-rail platforms. |
| Trickle Charging Support | Configurable 128/256/512 mA trickle current with automatic fast-to-trickle transition at 1.5–1.9 V BGATE - safely recovers deeply depleted batteries. |
| Turbo Mode Ideal Diode Control | Automatic BGATE linear regulation when VSYS drops within 150 mV of VBAT - prevents system collapse during battery-only operation. |
| Two-Level Adapter Current Limit | Short-duration high-current burst (e.g., 2.688 A) followed by sustained lower limit (e.g., 1.024 A) - accommodates peak loads without triggering thermal shutdown. |
Applications
| Ultrabook Power Management | Industrial Tablet Battery System |
|---|---|
Use Scenario: Dual-power-source laptop requiring seamless transition between AC adapter and 3-cell Li-ion battery while maintaining stable 12 V system rail and reporting platform power to CPU. IC Role / Device Role / Timing Role: Primary NVDC charger and system power arbiter; delivers PSYS analog signal and PROCHOT# to Intel IMVP-8 core regulator. Use Value: Enables compliance with Intel power delivery specifications while supporting USB OTG peripheral powering during battery-only operation. | Use Scenario: Ruggedized tablet operating in field environments with variable input sources (USB-C PD, 12 V vehicle adapter) and demanding battery runtime requirements. IC Role / Device Role / Timing Role: Buck-boost charger with dual current monitoring and robust protection (WOCP, OVP, OTP); manages battery health via programmable charge profiles. Use Value: Extends operational uptime through adaptive power sourcing and real-time current telemetry for predictive maintenance. |
| Medical Handheld Diagnostic Device | Mobile POS Terminal with Peripheral Charging |
Use Scenario: Portable ultrasound or glucose monitor requiring certified battery charging, low-noise power delivery, and safe battery disconnect under fault conditions. IC Role / Device Role / Timing Role: Safety-critical battery charger with BGATE-controlled isolation, trickle recovery, and overtemperature/overcurrent shutdown. Use Value: Meets IEC 62368-1 requirements via hardware-enforced current limits and fail-safe BGATE pull-down on BATGONE assertion. | Use Scenario: Credit card terminal with integrated USB OTG port to power barcode scanners or printers from its 2-cell battery pack. IC Role / Device Role / Timing Role: Reverse-buck OTG controller with 5 V regulation and battery voltage validation (VBAT ≥5.8 V required before enabling). Use Value: Eliminates need for separate boost converter; leverages existing power stage for cost- and space-efficient peripheral support. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost battery charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL9238 | Successor device with enhanced thermal performance, improved PSYS linearity, and extended junction temperature rating (150°C vs. 125°C). | Preferred for new designs targeting higher ambient temperatures or tighter power budget tolerances. | Select ISL9238 when designing for >100°C ambient or requiring updated IMVP-8 compliance with tighter PSYS accuracy. |
| BQ25790RTWR | TI buck-boost charger with integrated ADC, fuel gauge interface, and USB Type-C PD support - lacks native IMVP-8 PSYS/PROCHOT# outputs. | Targets USB-C-centric portable devices rather than Intel-platform notebooks. | Choose BQ25790RTWR for USB-C PD-native designs needing integrated telemetry, not IMVP-8 platform integration. |
Compared with ISL9237IRZR5700, ISL9238 offers higher thermal resilience and refined analog monitoring, while BQ25790RTWR provides broader USB-C ecosystem compatibility at the expense of IMVP-8 co-design capability.
Availability
ISL9237IRZR5700 is available at Aetrix Electronics and suitable for ultrabooks, industrial tablets, medical handhelds, and mobile POS terminals requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL9237IRZR5700 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 acquired Intersil in 2017 and continues to support its high-performance analog and power management portfolio for computing, industrial, and automotive markets.
The ISL9237IRZR5700 belongs to Renesas' mobile power management IC family, engineered specifically for Intel IMVP-8-compliant notebook platforms requiring integrated battery charging, system power arbitration, and platform-level thermal/power coordination.
FAQ
What is the primary function of the ISL9237IRZR5700 in a notebook power architecture?
The ISL9237IRZR5700 serves as a buck-boost narrow-VDC battery charger and system power manager. It regulates VSYS across 1–3-cell Li-ion batteries, arbitrates power between adapter and battery, provides IMVP-8-compliant PSYS and PROCHOT# signals, and supports USB OTG reverse-buck operation - all within a single 4×4 mm QFN package. Its R3™ modulator ensures high efficiency at light loads and fast transient response critical for modern ultrabooks.
How does the ISL9237IRZR5700 implement USB OTG functionality?
The ISL9237IRZR5700 enables USB OTG by operating in reverse-buck mode: when OTGEN is pulled high and battery voltage exceeds 5.8 V, it drives the same power stage to deliver regulated 5 V at the USB port. The OTGPG/CMOUT pin acts as an open-drain power-good indicator, asserting low if output voltage deviates from regulation. This eliminates need for a separate boost converter while reusing existing MOSFETs and inductors.
What are the key protections integrated into the ISL9237IRZR5700?
The ISL9237IRZR5700 integrates multiple hardware-based protections: way-overcurrent protection (WOCP), system overvoltage protection (OVP), over-temperature shutdown, adapter/battery overcurrent detection with programmable PROCHOT# thresholds, UVLO on ADP/VBAT/ACIN, and automatic BGATE pull-down on BATGONE assertion. These operate independently of firmware, ensuring fail-safe battery disconnect and system stability under fault conditions.
Can the ISL9237IRZR5700 operate without an external microcontroller?
Yes - the ISL9237IRZR5700 supports stand-alone operation using resistor-programmed defaults via the PROG pin (setting cell count, switching frequency, and adapter current limit). However, full feature utilization - including dynamic charge current adjustment, PSYS scaling, OTG enable/disable, and PROCHOT# threshold tuning - requires SMBus/I²C communication with a system host or EC. Default configuration enables basic charging and system regulation without software.
What is the role of the PSYS output on the ISL9237IRZR5700?
The PSYS pin on the ISL9237IRZR5700 is a current-source output that delivers an analog signal proportional to total platform power consumption. It is IMVP-8 compliant and designed to interface directly with Intel core voltage regulators (e.g., ISL9585x series) to coordinate dynamic voltage/frequency scaling (DVFS) and thermal throttling. Its accuracy and linearity are specified across temperature and load, enabling precise power budgeting in CPU-intensive notebooks.
ISL9237IRZR5700 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- R3™
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1 ~ 3
- Current - Charging:
- -
- Programmable Features:
- Current
- Fault Protection:
- Over Current, Over Temperature, Over Voltage
- Charge Current - Max:
- -
- Battery Pack Voltage:
- 13.82V (Max)
- Voltage - Supply (Max):
- 23.4V
- Interface:
- I2C, SMBus
- Operating Temperature:
- -10°C ~ 100°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (4x4)
ISL9237IRZR5700 FAQ
1.How can I place an order for ISL9237IRZR5700 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9237IRZR5700 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 ISL9237IRZR5700 reliable?
The price and inventory of ISL9237IRZR5700 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9237IRZR5700 is usually 5 days.
3.What payment methods are accepted for ISL9237IRZR5700?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9237IRZR5700 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9237IRZR5700?
ISL9237IRZR5700 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9237IRZR5700 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 ISL9237IRZR5700?
For technical support, including ISL9237IRZR5700 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9237IRZR5700 requirements.
6.How does Aetrix verify that ISL9237IRZR5700 is sourced from the original manufacturer or authorized distributors?
All ISL9237IRZR5700 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 ISL9237IRZR5700 meets industry standards.
7.What is the process for return or replacement of ISL9237IRZR5700?
All ISL9237IRZR5700 units undergo pre-shipment inspection (PSI). If there is an issue with ISL9237IRZR5700, 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 ISL9237IRZR5700 part is unused and in its original packaging.
Return procedure for ISL9237IRZR5700:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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