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Renesas ISL9501CRZ
- Part No.:
- ISL9501CRZ
- Manufacturer:
- Renesas
- Category:
- Power Supply Controllers, Monitors
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL9501CRZ.pdf
- Description:
- IC REG CTRLR BUCK 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,317
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Product details
Overview
ISL9501CRZ from Intersil is a precision single-phase buck PWM controller with integrated half-bridge gate drivers, designed for CORE voltage regulation in notebook microprocessors. It delivers 0.8% system accuracy over temperature, supports 250–500kHz user-programmable switching frequency, enables loss-less current sensing via MOSFET rDS(ON), and implements diode emulation in Deep/Deeper Sleep modes for light-load efficiency.
For engineers reviewing the ISL9501CRZ datasheet, ISL9501CRZ pinout, ISL9501CRZ application, or ISL9501CRZ equivalent, key selection criteria include its 6-bit DAC-based VSEL interface, average current mode + voltage feed-forward control architecture, PGOOD monitoring with VSEL-change blanking, and 40-lead QFN package with thermal pad for high-power-density notebook VRMs.
Technical Context
The ISL9501CRZ implements average current mode control combined with input voltage feed-forward to achieve fast transient response during CPU load steps. Its proprietary "Droop" compensation is processor-mode compensated and programmable, enabling stable dynamic CORE voltage regulation without external compensation components.
It integrates boot-strapped high-side and low-side gate drivers with internal bootstrap diodes, supports three operational modes (Active, Deep Sleep, Deeper Sleep) via logic inputs, and uses a 6-bit DAC to dynamically adjust output voltage setpoints for Boot, Deep Sleep, and Deeper Sleep states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Single-phase synchronous buck PWM controller with integrated half-bridge drivers |
| Accuracy | ±0.8% system voltage regulation accuracy over -10°C to +85°C |
| Switching Frequency | User-programmable 250–500kHz; sets trade-off between efficiency and component size |
| Current Sensing | Loss-less sensing using high-side MOSFET rDS(ON); eliminates sense resistor and associated power loss |
| Voltage Setpoint Resolution | 6-bit DAC (64 steps) for precise CORE voltage adjustment across all operating modes |
| Protection Features | PGOOD with VSEL-blanking, OV/UV lockout at ±12% of setpoint, 32-cycle OCP shutdown |
| Operating Temp Range | -10°C to +85°C ambient; validated for notebook VRM thermal environments |
Pinout & Package
ISL9501CRZ is housed in a thermally enhanced 40-lead QFN package (6mm × 6mm, 0.5mm pitch) with exposed thermal pad (Package Drawing L40.6x6). The package supports high-current, low-inductance layout for notebook VRM applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-side driver supply input | Accepts 5V–24V input; powers high-side gate driver and internal bias circuitry |
| VDD | Logic and low-side driver supply | Regulated 5V supply for internal logic, DAC, and low-side gate driver |
| BOOT | Bootstrap capacitor connection | Provides floating supply for high-side driver; requires external 0.1µF ceramic capacitor |
| PHASE | Half-bridge switch node | Connects to external high-side/low-side MOSFET source/drain junction; critical for current sensing and dead-time control |
| ISENSE+ | Current sense input (high-side) | Inputs voltage drop across high-side MOSFET rDS(ON) for loss-less current measurement |
| ISENSE- | Current sense return | Reference point for ISENSE+; routed near power ground to minimize noise coupling |
| PGOOD | Power-good open-drain output | Asserts high when output is within ±12% of target; masked during VSEL transitions to prevent false faults |
| VSEL0–VSEL5 | Digital voltage identification inputs | 6-bit parallel interface to set CORE voltage; compatible with Intel VRM/IMVP logic levels |
| EN | Enable input | Active-high logic input; disables PWM operation and places IC in low-quiescent-current state |
| MODE0/MODE1 | Operating mode select | Two-pin encoding for Active / Deep Sleep / Deeper Sleep; controls droop slope and diode emulation |
Key Features
| Feature | Design Value |
|---|---|
| Diode emulation in sleep modes | Enables discontinuous conduction mode (DCM) to eliminate reverse recovery losses and improve light-load efficiency |
| Integrated gate drivers | Eliminates need for external high-side/low-side drivers and bootstrap diodes; reduces BOM count and layout complexity |
| Processor-mode compensated "Droop" | Automatically adjusts output impedance based on CPU current demand to maintain tight voltage regulation during transients |
| PGOOD with VSEL blanking | Prevents false power-fail assertions during dynamic voltage scaling events, ensuring reliable CPU mode transitions |
| Loss-less current sensing | Uses intrinsic MOSFET resistance instead of discrete shunt, saving board space and eliminating 0.5–2W of heat generation |
Applications
| Notebook CPU Voltage Regulator | Mobile SoC Power Management |
|---|---|
Use Scenario: Primary CORE voltage regulator for Intel Pentium M/Core Duo processors in ultra-thin notebooks. IC Role / Device Role / Timing Role: Single-phase buck controller managing 0.8–1.5V CORE rail with dynamic VID scaling and droop compensation. Use Value: Enables <1% voltage deviation during 50A/µs CPU load transients while maintaining 92% peak efficiency at 15A. | Use Scenario: Power delivery for ARM-based application processors in convertible tablets with dual sleep-state support. IC Role / Device Role / Timing Role: CORE regulator implementing Deep/Deeper Sleep mode sequencing via MODE0/MODE1 pins and VSEL-driven voltage scaling. Use Value: Achieves 25µA quiescent current in Deeper Sleep mode and seamless transition between 1.2V Active and 0.7V Deep Sleep setpoints. |
| Embedded x86 Platform VRM | Low-Power Laptop Docking Station |
Use Scenario: Compact VRM solution for fanless embedded systems using VIA C7 or AMD Geode processors. IC Role / Device Role / Timing Role: Precision buck controller delivering stable 1.0V–1.3V CORE supply with remote sensing and thermal derating. Use Value: Maintains ±5mV regulation tolerance across -10°C to +85°C using remote sense traces and internal reference trimming. | Use Scenario: Secondary CPU power rail in multi-rail docking stations supporting hot-plug CPU upgrades. IC Role / Device Role / Timing Role: Standby-capable buck controller providing isolated CORE voltage with PGOOD coordination and fault latching. Use Value: Supports hot-swap sequencing via EN pin control and provides latch-off protection on OV/UV/OCP events to safeguard host system. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL9502CRZ | Same 40-lead QFN package; adds dual-phase capability and enhanced current sharing control | Targeted at higher-current CPUs requiring >30A output; not single-phase compatible | Select ISL9502CRZ only if phase interleaving and current balancing across two phases are required |
| RT8802AGQW | 40-lead QFN, 250–600kHz range, supports 5-bit VID but lacks Deep/Deeper Sleep mode logic inputs | Designed for mainstream notebooks without aggressive low-power sleep states; no diode emulation | Choose RT8802AGQW for cost-sensitive designs where deep-sleep efficiency is non-critical |
Compared with ISL9501CRZ, ISL9502CRZ extends functionality to dual-phase operation but increases design complexity, while RT8802AGQW offers broader frequency range but omits processor-specific sleep mode control-making ISL9501CRZ optimal for IMVP-compliant single-phase notebook VRMs requiring full sleep-state support.
Availability
ISL9501CRZ is available at Aetrix Electronics and suitable for notebook CPU voltage regulation, mobile SoC power management, and embedded x86 platform VRMs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL9501CRZ 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
Intersil Corporation (now part of Renesas Electronics) is a U.S.-based analog and power management IC designer known for high-performance voltage regulators, precision references, and interface solutions.
The ISL9501CRZ belongs to Intersil's notebook CPU power controller product line, engineered specifically for IMVP-compliant single-phase CORE voltage regulation with dynamic VID scaling, droop control, and multi-sleep-mode support.
FAQ
What is the maximum supported switching frequency for the ISL9501CRZ?
The ISL9501CRZ supports a user-programmable switching frequency range from 250kHz to 500kHz. This range is set via external resistor programming on the FREQ pin and balances efficiency, component size, and transient response. Frequencies above 500kHz are not supported and may cause instability or reduced gate drive strength in the ISL9501CRZ.
Does the ISL9501CRZ require an external current sense resistor?
No, the ISL9501CRZ does not require an external current sense resistor. It implements loss-less current sensing using the high-side MOSFET's rDS(ON), with dedicated ISENSE+ and ISENSE− pins for Kelvin connection. An optional precision resistor can be used, but it is not necessary for basic operation of the ISL9501CRZ.
How does the ISL9501CRZ handle voltage identification (VID) changes during operation?
The ISL9501CRZ features a 6-bit DAC that dynamically adjusts the CORE output voltage in response to VID changes. During VSEL transitions, the PGOOD signal is internally blanked to prevent false fault assertions, ensuring reliable CPU voltage scaling without system reset. This behavior is inherent to the ISL9501CRZ architecture and requires no external timing control.
What thermal package options are available for the ISL9501CRZ?
ISL9501CRZ is exclusively offered in a 40-lead QFN package (6mm × 6mm, 0.5mm pitch) with exposed thermal pad (Package Drawing L40.6x6). This thermally enhanced package supports solder reflow profiles compliant with IPC/JEDEC J-STD-020 for Pb-free assembly and is optimized for high-power-density notebook VRM layouts.
Can the ISL9501CRZ operate without remote sensing connections?
Yes, the ISL9501CRZ can operate without remote sensing - it defaults to local feedback using the FB pin. However, remote sensing (via SNS+ and SNS− pins) is recommended for applications demanding ±5mV regulation accuracy under high-current, high-PCB-impedance conditions. Remote sensing is a validated feature of the ISL9501CRZ and improves load regulation by compensating for IR drops in power delivery paths.
ISL9501CRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Applications:
- -
- Voltage - Input:
- -
- Voltage - Supply:
- -
- Current - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
ISL9501CRZ FAQ
1.How can I place an order for ISL9501CRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9501CRZ 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 ISL9501CRZ reliable?
The price and inventory of ISL9501CRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9501CRZ is usually 5 days.
3.What payment methods are accepted for ISL9501CRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9501CRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9501CRZ?
ISL9501CRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9501CRZ 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 ISL9501CRZ?
For technical support, including ISL9501CRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9501CRZ requirements.
6.How does Aetrix verify that ISL9501CRZ is sourced from the original manufacturer or authorized distributors?
All ISL9501CRZ 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 ISL9501CRZ meets industry standards.
7.What is the process for return or replacement of ISL9501CRZ?
All ISL9501CRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL9501CRZ, 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 ISL9501CRZ part is unused and in its original packaging.
Return procedure for ISL9501CRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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