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Renesas ISL9237IRZ-TR5700
- Part No.:
- ISL9237IRZ-TR5700
- Manufacturer:
- Renesas
- Category:
- Battery Chargers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL9237IRZ-TR5700.pdf
- Description:
- NOTEBOOK BATTERY CHARGER 4X4 QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,358
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Product details
Overview
ISL9237IRZ-TR5700 from Renesas Electronics (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 for high light-load efficiency. It supports input voltages from 3.2V to 23.4V and regulates system output between 2.4V and 13.824V in mobile and industrial power management applications.
For engineers reviewing the ISL9237IRZ-TR5700 datasheet, ISL9237IRZ-TR5700 pinout, ISL9237IRZ-TR5700 application, or ISL9237IRZ-TR5700 equivalent, key selection considerations include NVDC topology behavior, dual current-sense monitoring (AMON/BMON), adapter/battery priority logic, OTG enable conditions (VBAT > 5.8V), and PSYS analog platform power reporting for Intel IMVP-8 platforms.
Technical Context
The ISL9237IRZ-TR5700 implements a four-switch buck-boost converter with R3™ adaptive on-time control, enabling seamless transitions between DCM and CCM across load ranges. Its dual-path power routing supports simultaneous adapter-to-battery charging and system bus regulation, with independent current sensing for adapter (Rs1 = 20 mΩ) and battery (Rs2 = 10 mΩ) paths.
It integrates IMVP-8-compliant functions including PSYS current-source output proportional to total platform power, open-drain PROCHOT# assertion on adapter overcurrent (ACProchot), battery over-discharge (DCProchot), or low VSYS events, and Turbo mode ideal diode control via BGATE linear regulation during trickle charge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Four-switch buck-boost with NVDC (narrow VDC) system regulation |
| Input voltage range | 3.2V to 23.4V - supports USB PD, travel adapters, and legacy DC inputs without dead zone |
| System output range | 2.4V to 13.824V - programmable via SMBus for 1/2/3-cell Li-ion battery systems |
| Switching frequency | Up to 1 MHz - selectable via PROG pin resistor; enables compact LC filter design |
| OTG output | 5V reverse-buck mode - enabled only when battery ≥5.8V and OTGEN pin high |
| PSYS output | Current-source output - IMVP-8 compliant analog representation of total platform power consumption |
| PROCHOT# compliance | Open-drain, IMVP-8 compliant - asserts on ACProchot, DCProchot, or Low_VSYS events |
Pinout & Package
ISL9237IRZ-TR5700 is housed in a RoHS-compliant 4×4 mm, 32-lead QFN package (PKG DWG L32.4x4A) with exposed thermal pad (GND) for enhanced thermal dissipation. Pin mapping is validated per FN8723 Rev.5.00 datasheet, Page 3–5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Bottom Pad) | Signal/common reference & thermal path | Must be soldered to PCB ground plane for electrical integrity and thermal performance |
| CSOP/CSON | Battery current sense differential inputs | Connect across Rs2 (10 mΩ); enable ±1% charge current accuracy at ≥1A |
| CSIP/CSIN | Adapter current sense differential inputs | Connect across Rs1 (20 mΩ); support two-level adapter current limiting (1024mA/2688mA) |
| BGATE | Battery gate drive output | Drives external P-FET to isolate battery; supports linear mode for trickle charge regulation |
| ASGATE | Adapter-side FET gate drive | Optional P-FET control for adapter input isolation; clamped 10V below ADP |
| OTGEN/CMIN | OTG enable / comparator input | Pull-high to enable OTG; requires VBAT > 5.8V and SMBus register configuration |
| PSYS | Platform power monitor output | Current-source output (typ. 1 µA/mW) for IMVP-8 core regulator feedback |
| PROCHOT# | Thermal/power fault indicator | Asserts low on adapter overcurrent, battery over-discharge, or VSYS undervoltage |
Key Features
| Feature | Design Value |
|---|---|
| R3™ Modulator Architecture | Enables fast transient response and high light-load efficiency without external compensation |
| Two-Level Adapter Current Limit | Configurable SMBus thresholds (1024mA/2688mA) with programmable duration for surge handling |
| Trickle Charging Support | Three programmable currents (128/256/512mA) with automatic fast-to-trickle transition at VBGATE = 1.7V |
| Turbo Mode Ideal Diode Control | Linear BGATE regulation maintains <150mV VSYS–VBAT drop during battery-only operation |
| SMBus/I²C Auto-Increment Mode | Enables burst writes to multiple registers with single address setup, reducing firmware overhead |
Applications
| Ultrabook Power Management | Industrial Handheld Terminal |
|---|---|
Use Scenario: Dual-input (adapter + battery) power system requiring stable 12V system rail and intelligent charge termination for 3-cell Li-ion pack. IC Role / Device Role / Timing Role: NVDC buck-boost charger regulating VSYS while simultaneously charging battery and reporting platform power via PSYS. Use Value: Eliminates need for separate system regulator; PSYS output directly interfaces with IMVP-8 core VRMs for dynamic power capping. | Use Scenario: Ruggedized portable terminal operating from 2-cell Li-ion battery with field-replaceable adapter input and USB OTG host capability. IC Role / Device Role / Timing Role: Charger IC providing reverse-buck 5V OTG output when battery ≥5.8V and adapter absent. Use Value: Enables peripheral connection (keyboard, flash drive) without external power - no additional boost converter required. |
| Medical Point-of-Care Device | Mobile POS Terminal |
Use Scenario: Battery-backed diagnostic instrument requiring precise charge current control, low quiescent current in standby, and overtemperature/overcurrent fault signaling. IC Role / Device Role / Timing Role: Primary battery charger with PROCHOT# assertion on battery discharge overcurrent (≥4.096A) and integrated thermal shutdown. Use Value: Meets IEC 60601 safety requirements via hardware-enforced current limits and fail-safe BGATE shutdown on BATGONE high. | Use Scenario: Credit card reader with USB-C input supporting both charging and data, requiring adapter presence detection and system voltage hold-up during battery switchover. IC Role / Device Role / Timing Role: Adapter supervisor and seamless power source selector using ACOK and VSYS regulation with <100µs transient response. Use Value: ACOK output confirms adapter readiness before enabling system loads; eliminates brownout during adapter plug-in. |
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 |
|---|---|---|---|
| ISL9238HRZ | Successor device with enhanced thermal performance (θJA = 32°C/W), wider input range (2.7V–26V), and improved AMON/BMON accuracy (±1.5% vs ±2.5%) | Recommended for new designs targeting higher reliability and extended input voltage margin | Select ISL9238HRZ where long-term supply continuity and improved efficiency at light loads are critical |
| BQ25790RGER | TI part with integrated ADC, USB PD 3.0 compliance, and hybrid buck-boost topology; lacks native PSYS output and IMVP-8 PROCHOT# signaling | Preferred for USB-C PD ecosystems requiring vendor-agnostic communication and telemetry | Choose BQ25790RGER when USB PD negotiation and embedded telemetry outweigh IMVP-8 compatibility needs |
Compared with ISL9237IRZ-TR5700, ISL9238HRZ offers direct upgrade path with identical pinout and register map but superior thermal specs and accuracy, whereas BQ25790RGER provides broader protocol support at the cost of IMVP-8 integration and requires redesign for PSYS/PROCHOT# replacement.
Availability
ISL9237IRZ-TR5700 is available at Aetrix Electronics and suitable for ultrabooks, industrial handheld terminals, medical point-of-care devices, and mobile POS terminals requiring stable component supply, long-lifecycle support, and proven NVDC battery management.
Supply support for ISL9237IRZ-TR5700 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 formed from the merger of Renesas Technology and NEC Electronics, specializing in microcontrollers, analog power management, and timing solutions for automotive, industrial, and computing markets.
The ISL9237IRZ-TR5700 belongs to Renesas' high-efficiency battery charger IC product line, designed specifically for Intel IMVP-8-compliant platforms and portable devices requiring narrow-VDC system regulation with USB OTG capability.
FAQ
What is the maximum supported battery cell count for ISL9237IRZ-TR5700?
The ISL9237IRZ-TR5700 supports up to 3-series Li-ion cells, configured via the PROG pin resistor at startup or dynamically reprogrammed via SMBus. Default cell count is set by PROG-to-GND resistance (e.g., 100kΩ = 3-cell), and the device validates battery voltage thresholds (e.g., VBAT_5P8_r = 5.95V) accordingly. This enables safe charging of 12.6V nominal packs while maintaining accurate voltage regulation across the full system output range (2.4V–13.824V).
Does ISL9237IRZ-TR5700 support USB On-The-Go (OTG) functionality?
Yes, ISL9237IRZ-TR5700 supports USB OTG by operating in reverse buck mode to deliver regulated 5V at the USB port. OTG activation requires three conditions: OTGEN pin pulled high, battery voltage ≥5.8V (VBAT_5P8_r), and SMBus OTG enable register written. The OTGPG/CMOUT pin provides open-drain power-good indication, and output current is limited to prevent adapter overload during reverse operation. This eliminates need for discrete boost converters in portable host applications.
How does ISL9237IRZ-TR5700 implement IMVP-8 compliance?
ISL9237IRZ-TR5700 achieves IMVP-8 compliance through two dedicated hardware features: PSYS current-source output that scales linearly with total platform power (1 µA/mW typical), and PROCHOT# open-drain signal asserting low on adapter overcurrent, battery over-discharge, or VSYS undervoltage events. Both signals interface directly with IMVP-8-compliant core VRMs without level-shifting or firmware translation, enabling real-time thermal and power throttling in Intel-based ultrabooks and 2-in-1 systems.
What are the current-sensing configurations supported by ISL9237IRZ-TR5700?
ISL9237IRZ-TR5700 provides dual independent current-sense paths: AMON monitors adapter input current using CSIP/CSIN with Rs1 = 20 mΩ (±2% accuracy at 5A), and BMON monitors battery discharge current using CSOP/CSON with Rs2 = 10 mΩ (±2% accuracy at 10A). Both outputs scale at ~18 V/V (AMON gain = 17.91, BMON gain = 17.95) and feed into dedicated PROCHOT# thresholds - enabling hardware-based overcurrent protection without host intervention.
Can ISL9237IRZ-TR5700 operate without an adapter input?
Yes, ISL9237IRZ-TR5700 operates in battery-only mode with BGATE controlling the system-to-battery PFET. When adapter is absent, it regulates VSYS from battery via buck operation, enters Turbo mode for <150mV dropout, and maintains PSYS reporting and PROCHOT# monitoring. The device draws only 12 µA quiescent current (IBAT1) in this state, preserving runtime. Battery removal is detected via BATGONE pin, which forces immediate BGATE shutdown to isolate system from depleted cells.
ISL9237IRZ-TR5700 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- R3™
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1 ~ 3
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current, Timer, Voltage
- 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)
ISL9237IRZ-TR5700 FAQ
1.How can I place an order for ISL9237IRZ-TR5700 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9237IRZ-TR5700 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 ISL9237IRZ-TR5700 reliable?
The price and inventory of ISL9237IRZ-TR5700 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9237IRZ-TR5700 is usually 5 days.
3.What payment methods are accepted for ISL9237IRZ-TR5700?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9237IRZ-TR5700 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9237IRZ-TR5700?
ISL9237IRZ-TR5700 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9237IRZ-TR5700 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 ISL9237IRZ-TR5700?
For technical support, including ISL9237IRZ-TR5700 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9237IRZ-TR5700 requirements.
6.How does Aetrix verify that ISL9237IRZ-TR5700 is sourced from the original manufacturer or authorized distributors?
All ISL9237IRZ-TR5700 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 ISL9237IRZ-TR5700 meets industry standards.
7.What is the process for return or replacement of ISL9237IRZ-TR5700?
All ISL9237IRZ-TR5700 units undergo pre-shipment inspection (PSI). If there is an issue with ISL9237IRZ-TR5700, 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 ISL9237IRZ-TR5700 part is unused and in its original packaging.
Return procedure for ISL9237IRZ-TR5700:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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