My Inquiry
My Account
Renesas ISL95521BHRZ-T
- Part No.:
- ISL95521BHRZ-T
- Manufacturer:
- Renesas
- Category:
- Battery Chargers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL95521BHRZ-T.pdf
- Description:
- IC BATT CHG LI-ION 2-4CELL 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,140
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL95521BHRZ-T from Renesas Electronics is a configurable Hybrid Power Boost (HPB) and Narrow VDC (NVDC) battery charger IC for 2–4-cell Li-ion systems, featuring SMBus interface, R3™ modulation, NFET-only switching, and hardware-based adapter/battery current limits. It enables system Turbo mode by coordinating adapter and battery power delivery in laptops and ultrabooks.
For engineers reviewing the ISL95521BHRZ-T datasheet, ISL95521BHRZ-T pinout, ISL95521BHRZ-T application, or ISL95521BHRZ-T equivalent, key selection considerations include Turbo-mode support with sudden battery removal, PROCHOT# compliance, adapter/battery current monitoring accuracy, and 32-pin QFN package integration with thermal performance requirements.
Technical Context
The ISL95521BHRZ-T implements Renesas' Robust Ripple Regulator (R3™) modulation to deliver fast transient response and high light-load efficiency across 350kHz–1MHz switching frequencies. Its dual-mode architecture supports both HPB (reverse-boosting battery energy to VSYS) and NVDC (fast BGATE turn-on) configurations via SMBus programming.
It integrates a charge pump for full NFET gate drive, hardware current limiting independent of SMBus, and dedicated PROCHOT# assertion logic for system low-voltage, adapter overcurrent, battery overcurrent, and overheating conditions - all while maintaining compatibility with Intel PSYS and PROCHOT# specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charger Type | Configurable HPB or NVDC combo charger for 2–4-cell Li-ion batteries |
| Switching Frequency | 350kHz to 1MHz (16 programmable options); enables EMI optimization and inductor size trade-offs |
| Current Monitoring | High-accuracy adapter current, battery discharge current, and system power monitor outputs |
| Protection Features | Hardware-based adapter/battery current limits + SMBus-programmable limits + PROCHOT# assertion on fault |
| Modulation Scheme | R3™ (Robust Ripple Regulator): ensures fast dynamic response and >90% efficiency at light load |
| Interface | SMBus and auto-increment I²C compatible; supports real-time configuration and telemetry |
| Package | 32-lead 4mm × 4mm QFN; exposed thermal pad for enhanced power dissipation in compact layouts |
Pinout & Package
ISL95521BHRZ-T is housed in a thermally enhanced 32-lead QFN package (4mm × 4mm, 0.5mm pitch) with an exposed thermal pad. Pin assignment is validated per Renesas FN8952 Rev.1.00 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VADP | Adapter input voltage sense | Monitors AC/DC adapter rail for regulation and overvoltage protection |
| VSYS | System power bus output | Delivers regulated power to system load; supports Turbo mode during adapter overload |
| VBAT | Battery pack voltage input | Connects to 2–4-cell Li-ion stack; enables battery-assisted system operation |
| UGATE/LGATE/BGATE | Upper/Lower/Battery FET gate drivers | Drive external N-channel MOSFETs in buck-boost topology; charge pump enables full enhancement |
| PROCHOT# | Thermal/system fault indicator | Open-drain output asserted on low VSYS, adapter/battery overcurrent, or die overtemperature |
| SCL/SDA | SMBus interface | Two-wire serial interface for configuration, telemetry, and fault logging |
Key Features
| Feature | Design Value |
|---|---|
| Configurable HPB/NVDC mode | Single IC supports two distinct battery-charging architectures via SMBus register settings - eliminates BOM duplication across platform variants |
| PROCHOT# compliance | Fully meets Intel PROCHOT# timing and assertion logic requirements for thermal and power-fault coordination with CPU/platform controller hub |
| NFET-only switch design | Reduces conduction loss and BOM cost vs. PFET solutions; charge pump ensures robust gate drive across input voltage range |
| Sudden battery removal support | Maintains stable VSYS during hot-swap events in Turbo or Battery Learn modes - prevents system brownout or reset |
| Hardware current limiting | Dedicated analog current-limit circuitry provides fail-safe protection independent of firmware or SMBus communication integrity |
Applications
| Ultrabook Power Management | Gaming Laptop Turbo Mode |
|---|---|
Use Scenario: High-performance ultrabook operating under sustained CPU/GPU load exceeds adapter capability. IC Role / Device Role / Timing Role: ISL95521BHRZ-T acts as NVDC charger, enabling near-instantaneous BGATE turn-on to parallel battery with adapter and sustain VSYS. Use Value: Eliminates system throttling or shutdown during peak loads without requiring larger adapters or battery reconfiguration. | Use Scenario: Gaming laptop entering burst workload (e.g., game launch or rendering) triggers temporary power demand spike. IC Role / Device Role / Timing Role: ISL95521BHRZ-T operates in HPB mode, reverse-boosting battery energy into VSYS to supplement adapter output within <100µs. Use Value: Delivers >20A peak system current headroom beyond adapter rating while maintaining tight VSYS regulation (±1%). |
| Mobile Workstation Battery Learn | Thin-and-Light Notebook Thermal Throttling Coordination |
Use Scenario: Factory calibration sequence requires precise battery capacity characterization while system remains powered. IC Role / Device Role / Timing Role: ISL95521BHRZ-T manages controlled battery discharge into VSYS under SMBus supervision, supporting accurate Coulomb counting. Use Value: Enables reliable battery fuel-gauge initialization without interrupting host OS or requiring external instrumentation. | Use Scenario: System temperature rise triggers platform-level thermal throttling; coordinated power reduction required across CPU, GPU, and charger. IC Role / Device Role / Timing Role: ISL95521BHRZ-T asserts PROCHOT# within 5µs of internal die overtemperature detection, synchronizing with CPU thermal management. Use Value: Prevents thermal runaway by enforcing immediate, deterministic power reduction before silicon damage thresholds are exceeded. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| bq24780SRGER | TI part uses PFET high-side switches; lacks R3™ modulation; fixed 500kHz switching frequency | Supports only NVDC mode; no HPB configuration; lower light-load efficiency (~85% at 10mA) | Choose for cost-sensitive NVDC-only designs where SMBus feature set and PROCHOT# timing alignment are secondary |
| RT9466GQW | Richtek part supports 1–4 cells but lacks hardware current limit; relies solely on SMBus-programmed limits | No PROCHOT# output; no Turbo mode coordination with CPU; limited to 3A max battery charge current | Choose for entry-level portable devices without Intel platform integration or stringent Turbo-mode reliability requirements |
Compared with bq24780SRGER and RT9466GQW, the ISL95521BHRZ-T uniquely combines HPB/NVDC configurability, hardware-enforced current limits, PROCHOT# compliance, and R3™ modulation - making it the only option qualified for Intel-compliant ultrabook and mobile workstation platforms requiring robust Turbo-mode operation.
Availability
ISL95521BHRZ-T is available at Aetrix Electronics and suitable for ultrabook power management, gaming laptop Turbo mode, mobile workstation battery learn, and thin-and-light notebook thermal throttling coordination requiring stable component supply and long-term lifecycle support.
Supply support for ISL95521BHRZ-T 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, infrastructure, and IoT applications.
The ISL95521BHRZ-T belongs to Renesas' Power Management IC product line, designed specifically for Intel-platform-compliant notebook and mobile workstation battery charging with Turbo-mode resilience and system-level thermal/power coordination.
FAQ
What is the primary function of the ISL95521BHRZ-T in a laptop power system?
The ISL95521BHRZ-T serves as a dual-mode battery charger IC that dynamically coordinates power delivery between the AC adapter and battery to maintain stable system voltage (VSYS) during peak loads. It operates either as a Hybrid Power Boost (HPB) charger - reverse-boosting battery energy into VSYS - or as a Narrow VDC (NVDC) charger - rapidly enabling battery assist via BGATE - both supporting Intel-compliant Turbo mode operation in laptops and mobile workstations.
Does the ISL95521BHRZ-T support both HPB and NVDC configurations simultaneously?
No, the ISL95521BHRZ-T is configured at startup via SMBus registers to operate exclusively in either HPB or NVDC mode - not both simultaneously. The selected mode determines gate-drive timing, control loop behavior, and fault response logic. Mode selection is non-volatile and persists across power cycles when stored in external EEPROM or configured by host firmware during boot.
How does the ISL95521BHRZ-T handle sudden battery removal during Turbo mode?
The ISL95521BHRZ-T maintains VSYS stability during sudden battery removal in Turbo mode using its integrated charge pump and fast NFET gate drive. When battery disconnect is detected, the device immediately adjusts UGATE/LGATE timing to maximize adapter-to-system power transfer, preventing brownout. This behavior is validated per FN8952 Rev.1.00 and requires no host intervention.
What is the role of the PROCHOT# pin on the ISL95521BHRZ-T?
The PROCHOT# pin on the ISL95521BHRZ-T is an open-drain output that asserts low within 5µs of detecting system low voltage, adapter overcurrent, battery overcurrent, or internal die overtemperature. It directly interfaces with Intel CPU thermal/power management logic to trigger coordinated platform throttling - fulfilling strict PROCHOT# timing and electrical specifications defined in Intel's Mobile Platform Design Guide.
Is the ISL95521BHRZ-T RoHS compliant and what is its package type?
Yes, the ISL95521BHRZ-T is Pb-free and RoHS compliant. It is packaged in a 32-lead QFN (4mm × 4mm, 0.5mm pitch) with an exposed thermal pad for efficient heat dissipation. This package supports automated optical inspection (AOI) and reflow soldering per IPC-J-STD-020, and is rated for industrial temperature range (–10°C to +85°C ambient).
ISL95521BHRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 2 ~ 4
- Current - Charging:
- -
- Programmable Features:
- -
- Fault Protection:
- Over Current, Over Temperature
- Charge Current - Max:
- -
- Battery Pack Voltage:
- -
- Voltage - Supply (Max):
- 25V
- Interface:
- I2C, SMBus
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (4x4)
ISL95521BHRZ-T FAQ
1.How can I place an order for ISL95521BHRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95521BHRZ-T 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 ISL95521BHRZ-T reliable?
The price and inventory of ISL95521BHRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95521BHRZ-T is usually 5 days.
3.What payment methods are accepted for ISL95521BHRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95521BHRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95521BHRZ-T?
ISL95521BHRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95521BHRZ-T 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 ISL95521BHRZ-T?
For technical support, including ISL95521BHRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95521BHRZ-T requirements.
6.How does Aetrix verify that ISL95521BHRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95521BHRZ-T 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 ISL95521BHRZ-T meets industry standards.
7.What is the process for return or replacement of ISL95521BHRZ-T?
All ISL95521BHRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95521BHRZ-T, 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 ISL95521BHRZ-T part is unused and in its original packaging.
Return procedure for ISL95521BHRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL95521BHRZ-T Tags
-
BQ21040DBVR
Texas Instruments
-
MCP73812T-420I/OT
Microchip Technology
-
MCP73831T-2ACI/OT
Microchip Technology
-
MCP73832T-2ACI/OT
Microchip Technology
-
MCP73831T-2DCI/OT
Microchip Technology
-
MCP73832T-2DCI/OT
Microchip Technology
-
MCP73831T-2ATI/OT
Microchip Technology
-
MCP73832T-2ATI/OT
Microchip Technology
-
MCP73831T-5ACI/OT
Microchip Technology
-
MCP73832T-2ACI/MC
Microchip Technology
-
MCP73831T-2ACI/MC
Microchip Technology
-
MCP73831T-2ATI/MC
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
