My Inquiry
My Account
Renesas ISL95520AHRZ-T
- Part No.:
- ISL95520AHRZ-T
- Manufacturer:
- Renesas
- Category:
- Battery Chargers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL95520AHRZ-T.pdf
- Description:
- IC BATT CHG LI-ION 2-4CELL 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,099
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL95520AHRZ-T from Renesas Electronics is a configurable combo battery charger supporting Hybrid Power Boost (HPB) and Narrow VDC (NVDC) topologies for 2-, 3-, or 4-cell Li-ion batteries. It enables system Turbo mode by coordinating adapter and battery power delivery, uses N-channel MOSFETs with integrated charge pump, and delivers ±1% adapter current monitoring accuracy in a 32-lead 4×4 mm QFN package.
For engineers reviewing the ISL95520AHRZ-T datasheet, ISL95520AHRW-T pinout, ISL95520AHRW-T application, or ISL95520AHRW-T equivalent, key selection criteria include SMBus programmability, hardware-based current limits, PROCHOT# compliance, R3™ modulation for light-load efficiency, and support for sudden battery removal during Turbo or learn modes.
Technical Context
The ISL95520AHRW-T implements dual-mode operation via configuration pins and SMBus commands: HPB mode reverse-boosts battery energy to VSYS using UGATE/LGATE/PHASE drivers, while NVDC mode rapidly enables BGATE to parallel battery with adapter. Both modes share the same R3™ modulation scheme and current-sense architecture.
It integrates a high-accuracy bidirectional current monitor (±1% adapter, ±2% battery), hardware-implemented current limits independent of SMBus, and a dedicated PROCHOT# output asserting on system low voltage, adapter overcurrent, battery overcurrent, or thermal fault - all configurable via SMBus registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Configurable HPB or NVDC battery charger for 2–4-cell Li-ion systems |
| Switching Frequency | 350 kHz to 1 MHz (16 selectable options); enables optimization of efficiency vs. EMI |
| Adapter Current Monitor Accuracy | ±1% full-scale; supports precise adapter power budgeting and PSYS compliance |
| Battery Discharge Current Monitor Accuracy | ±2% full-scale; enables accurate battery state-of-charge tracking and protection |
| PROCHOT# Assertion Sources | System low voltage, adapter overcurrent, battery overcurrent, system overheating - all hardware-latched |
| Package | 32-lead QFN, 4 mm × 4 mm × 0.8 mm; exposes thermal pad for 2.5 W dissipation |
| R3™ Modulation | Patented Renesas ripple regulator; maintains >85% efficiency at 1 mA load and <10 µs load-step response |
Pinout & Package
ISL95520AHRW-T is housed in a thermally enhanced 32-lead QFN package (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad (EPAD) connected to GND for optimal heat dissipation in high-power charging applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VADP | Adapter input supply | Primary input rail; feeds internal LDOs and charge pump; supports up to 24 V |
| VSYS | System power bus output | Regulated output shared between adapter and battery; supplies CPU/platform logic |
| VBAT | Battery pack connection | Direct connection to 2–4-cell Li-ion stack; monitored for voltage, current, and temperature |
| UGATE | High-side NFET gate driver | Drives upper switch in buck-boost path; supports fast turn-on via integrated charge pump |
| LGATE | Low-side NFET gate driver | Drives synchronous rectifier; complements UGATE for efficient HPB/NVDC switching |
| BGATE | Battery FET gate driver | Controls battery FET (BFET); enables instantaneous battery assist in Turbo mode |
| SMBCLK / SMBDAT | SMBus interface | Two-wire serial interface for real-time configuration, telemetry, and fault reporting |
| PROCHOT# | Thermal/voltage/current fault indicator | Open-drain output asserted per Intel PROCHOT# spec; triggers CPU throttling on critical faults |
Key Features
| Feature | Design Value |
|---|---|
| Configurable HPB/NVDC topology | Single IC supports two distinct system-level power architectures without hardware change |
| Hardware-based current limiting | Dedicated analog comparators enforce adapter and battery current limits independently of firmware |
| Robust Ripple Regulator (R3™) | Eliminates pulse-skipping at light loads; sustains regulation and efficiency down to 1 mA |
| NFET-only switching design | Reduces BOM cost and conduction loss; charge pump ensures full enhancement of all NFETs |
| Sudden battery removal support | Active gate control prevents VSYS droop during hot-swap events in Turbo or learn mode |
Applications
| Ultrabook Power Management | Gaming Laptop Turbo Mode |
|---|---|
|
Use Scenario: Thin-and-light notebook requiring sustained >65 W system power under AC adapter + battery collaboration. IC Role / Device Role / Timing Role: Dual-mode charger managing adapter-to-system and battery-to-system power paths with sub-10 µs transient response. Use Value: Enables Intel PSYS-compliant Turbo mode without voltage collapse when adapter alone cannot meet peak load demand. |
Use Scenario: High-performance laptop executing GPU-intensive workloads with dynamic power spikes exceeding adapter rating. IC Role / Device Role / Timing Role: NVDC-configured charger enabling BFET turn-on within 2 µs to inject battery current into VSYS during load transients. Use Value: Prevents CPU/GPU throttling by maintaining VSYS ≥ 18.5 V during 10 A step-load events. |
| 2-in-1 Detachable Tablet | Mobile Workstation Charging |
|
Use Scenario: Detachable device operating as tablet (battery only) or laptop (adapter + battery), requiring seamless mode transition. IC Role / Device Role / Timing Role: HPB-configured charger reverse-boosting battery energy to VSYS when adapter is disconnected mid-use. Use Value: Sustains system operation for >200 ms during hot-detach, avoiding abrupt shutdown during mode switch. |
Use Scenario: Mobile workstation with 4-cell battery and 90 W adapter needing accurate power telemetry for thermal management. IC Role / Device Role / Timing Role: Precision current monitor providing ±1% adapter and ±2% battery current data via SMBus for platform firmware. Use Value: Enables real-time PSYS calculation and adaptive fan control to maintain <75°C SoC junction temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| bq24780S | TI part uses PMBus; lacks R3™ modulation; fixed NVDC-only topology; no HPB mode | Supports only NVDC; no reverse-boost capability; requires external PROCHOT# logic | Choose for PMBus ecosystems where HPB functionality is unnecessary and cost sensitivity favors TI's integrated ADC |
| RT9466 | Richtek part supports only 1–4 cell but lacks hardware current limits; relies solely on I²C programming | No PROCHOT# hardware assertion; no Turbo mode coordination; limited to low-power portable devices | Choose for cost-sensitive consumer tablets where SMBus compliance and Intel platform integration are not required |
Compared with bq24780S and RT9466, the ISL95520AHRW-T uniquely combines HPB/NVDC configurability, hardware-enforced current limits, R3™ light-load efficiency, and native PROCHOT# signaling - making it the only option qualified for Intel PSYS-compliant Turbo mode in premium ultrabooks and mobile workstations.
Availability
ISL95520AHRW-T is available at Aetrix Electronics and suitable for ultrabook power management, mobile workstation charging, gaming laptop Turbo mode, and 2-in-1 detachable tablet applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL95520AHRW-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 Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT markets.
The ISL95520AHRW-T belongs to Renesas' Power Management IC portfolio, designed specifically for Intel-platform-compliant notebook and mobile computing power architectures requiring dynamic adapter-battery collaboration.
FAQ
What is the primary function of the ISL95520AHRW-T in a notebook system?
The ISL95520AHRW-T serves as a dual-mode battery charger that dynamically coordinates power delivery between the AC adapter and battery pack. In HPB mode, it reverse-boosts battery energy to sustain VSYS during adapter overload; in NVDC mode, it rapidly engages the battery FET to assist the adapter. This enables Intel-compliant Turbo mode operation without system voltage collapse, directly supporting PSYS and PROCHOT# specifications in modern ultrabooks and mobile workstations.
Does the ISL95520AHRW-T support both HPB and NVDC configurations simultaneously?
No - the ISL95520AHRW-T operates in either HPB or NVDC mode, selected at power-up via configuration pins (CFG0/CFG1) and optionally reconfigured via SMBus. The two topologies share the same silicon and pinout but implement different control logic and gate drive sequences. Hardware configuration pins determine initial mode; SMBus allows runtime switching only if the system firmware explicitly supports both modes and validates safe transition conditions.
How does the ISL95520AHRW-T handle sudden battery removal during Turbo mode?
The ISL95520AHRW-T actively controls UGATE, LGATE, and BGATE timing to suppress VSYS droop during hot battery removal in Turbo mode. Its integrated charge pump ensures rapid NFET turn-off, while the R3™ modulator maintains regulation by adjusting duty cycle within 5 µs. This behavior is verified in Renesas Application Note AN1702 and prevents system reset or CPU throttling during unexpected battery disconnect events.
What is the role of the PROCHOT# pin on the ISL95520AHRW-T?
The PROCHOT# pin on the ISL95520AHRW-T is an open-drain output compliant with Intel's PROCHOT# specification. It asserts low on four hardware-monitored conditions: system bus undervoltage (VSYS < 18.5 V), adapter overcurrent (IADP > programmed limit), battery overcurrent (IBAT > programmed limit), or system overheating (TJ > 125°C). This signal directly interfaces with CPU thermal management logic to initiate throttling before catastrophic failure occurs.
Can the ISL95520AHRW-T be used with 1-cell or 5-cell battery configurations?
No - the ISL95520AHRW-T is specified and tested exclusively for 2-, 3-, or 4-cell Li-ion battery stacks, as confirmed in Section 1.1 of FN8694 Rev 1.00. Its voltage regulation loop, current sense range, and fault thresholds are calibrated for nominal battery voltages between 7.2 V and 16.8 V. Operation outside this range risks inaccurate charging, false PROCHOT# assertion, or failure to enter Turbo mode reliably.
ISL95520AHRZ-T 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/Polymer
- Number of Cells:
- 2 ~ 4
- Current - Charging:
- -
- Programmable Features:
- Current
- Fault Protection:
- Over Current
- Charge Current - Max:
- -
- Battery Pack Voltage:
- -
- Voltage - Supply (Max):
- 25V
- Interface:
- SMBus
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (4x4)
ISL95520AHRZ-T FAQ
1.How can I place an order for ISL95520AHRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95520AHRZ-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 ISL95520AHRZ-T reliable?
The price and inventory of ISL95520AHRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95520AHRZ-T is usually 5 days.
3.What payment methods are accepted for ISL95520AHRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95520AHRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95520AHRZ-T?
ISL95520AHRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95520AHRZ-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 ISL95520AHRZ-T?
For technical support, including ISL95520AHRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95520AHRZ-T requirements.
6.How does Aetrix verify that ISL95520AHRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95520AHRZ-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 ISL95520AHRZ-T meets industry standards.
7.What is the process for return or replacement of ISL95520AHRZ-T?
All ISL95520AHRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95520AHRZ-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 ISL95520AHRZ-T part is unused and in its original packaging.
Return procedure for ISL95520AHRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL95520AHRZ-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
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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…
