My Inquiry
My Account
Renesas ISL95837IRZ-T
- Part No.:
- ISL95837IRZ-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL95837IRZ-T.pdf
- Description:
- IC REG CONV INTEL 2OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,954
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL95837IRZ-T from Renesas (formerly Intersil) is a dual-output, 1+1 phase voltage regulator IC designed for IMVP-7/VR12™ CPU core power delivery. It integrates two independent 1-phase VRs with shared serial control bus, R3™ PWM modulation, DCR/resistor current sensing, and remote voltage sensing - delivering 0.5% system accuracy over temperature in notebook and desktop CPU power applications.
For engineers reviewing the ISL95837IRZ-T datasheet, ISL95837IRZ-T pinout, ISL95837IRZ-T application, or ISL95837IRZ-T equivalent, key selection criteria include IMVP-7/VR12™ compliance, dual 1-phase VR architecture, programmable VBOOT/IMAX/TMAX, adaptive body diode conduction control, and differential remote sensing capability.
Technical Context
The ISL95837IRZ-T implements two independent 1-phase VR controllers sharing a single SMBus-compatible serial interface for CPU communication. Each VR supports lossless DCR current sensing with single NTC thermistor compensation or precision resistor-based sensing, and features dedicated remote sense inputs, programmable overcurrent (OC) thresholds, and adjustable switching frequency.
Its Robust Ripple Regulator (R3™) PWM modulator enables variable-frequency operation during load transients, faster transient settling versus conventional modulators, and improved light-load efficiency via automatic frequency scaling - all while maintaining strict IMVP-7/VR12™ load-line compliance and ±0.5% output voltage accuracy across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulator Type | Dual 1-phase VR (1+1 configuration only) |
| IMVP-7/VR12™ Compliance | Fully compliant - meets dynamic load-line, VID code mapping, and SMBus command set requirements |
| System Accuracy | ±0.5% over full operating temperature range - ensures tight CPU VDD tolerance under thermal stress |
| Current Sensing | Supports both DCR (with NTC compensation) and precision resistor methods - enables flexible, cost-optimized inductor selection |
| VBOOT Programmability | Resistor-programmable boot voltage - controls high-side gate drive strength during startup |
| Switching Frequency | Adjustable via external resistor - sets base frequency and enables optimization for EMI vs. efficiency trade-offs |
| Protection Features | Dedicated OC protection per VR, adaptive body diode conduction time reduction - prevents shoot-through and improves efficiency |
Pinout & Package
ISL95837IRZ-T is housed in a 48-pin QFN package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin functions are defined per the official ISL95837 datasheet (FN7671), with dedicated pins for VR1/VR2 gate drivers, remote sense (VSNSx/RSNSx), SMBus (SCL/SDA), VID inputs, and protection signals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PHASE1, PHASE2 | High-side gate driver outputs | Drive external high-side MOSFETs for VR1 and VR2 independently |
| LGATE1, LGATE2 | Low-side gate driver outputs | Drive external low-side MOSFETs with adaptive dead-time control |
| VSNS1, VSNS2 | Remote voltage sense inputs | Differential sensing at CPU VRM input to compensate for PCB IR drop |
| RSNS1, RSNS2 | Current sense inputs | Accept DCR voltage or resistor-based current sense signals per VR |
| SCL, SDA | SMBus interface | Shared bidirectional serial bus for VID programming and telemetry reporting |
| VBOOT1, VBOOT2 | Boot capacitor voltage references | Set high-side gate drive voltage level via external resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| R3™ PWM Modulation | Variable switching frequency during transients + automatic light-load frequency scaling - reduces output voltage deviation and improves efficiency below 10% load |
| Dual Independent Remote Sense | Separate VSNS/RSNS pairs per VR - eliminates shared-sense error and enables accurate load-line regulation for both CPU cores |
| Programmable Thermal Limits | Resistor-set TMAX per VR - allows independent thermal throttling thresholds for asymmetric CPU/GPU power domains |
| Adaptive Body Diode Control | Dynamic adjustment of low-side MOSFET conduction time - minimizes reverse recovery losses and improves 5–30A efficiency by up to 1.2% |
| Shared SMBus Interface | Single SCL/SDA pair controlling both VRs - reduces PCB routing complexity and saves 2–3 MCU GPIOs vs. discrete VR solutions |
Applications
| High-Performance Notebook CPU Power | Desktop VR12™ Dual-Core Platforms |
|---|---|
Use Scenario: Power delivery to dual-core mobile CPUs (e.g., Intel Core i5/i7 ULV) requiring strict IMVP-7 load-line compliance and fast transient response. IC Role / Device Role / Timing Role: Dual 1-phase VR controller managing independent VDD and VCCIO rails with synchronized SMBus telemetry. Use Value: Enables <1% output deviation during 50A/μs load steps while maintaining ±0.5% DC accuracy - critical for stable CPU overclocking and turbo boost. | Use Scenario: Compact motherboard VRM design for VR12™-compliant desktop processors where space constraints prohibit multi-chip solutions. IC Role / Device Role / Timing Role: Single-package dual-VR controller replacing two discrete VR ICs - reduces component count and layout area by 35%. Use Value: Shared SMBus interface and integrated gate drivers cut BOM cost by $0.42 and eliminate inter-IC timing skew between VR1/VR2. |
| Embedded Computing with Dual Power Domains | Thin-and-Light Ultrabook Systems |
Use Scenario: Industrial embedded systems requiring independent, thermally isolated power rails for CPU and FPGA logic sections. IC Role / Device Role / Timing Role: Dual VR with separate IMAX/TMAX programming - allows independent current limiting and thermal shutdown per domain. Use Value: Prevents single-point failure propagation; maintains FPGA operation during CPU thermal throttling without firmware intervention. | Use Scenario: Sub-15mm chassis designs where VRM height and thermal density must be minimized. IC Role / Device Role / Timing Role: 7mm × 7mm QFN-packaged dual VR with exposed thermal pad - enables direct heatsink mounting and 22W total dissipation. Use Value: Reduces VRM stack height by 1.8mm vs. dual-QFN alternatives, freeing space for battery expansion or fanless cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 1-phase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL95835IRZ-T | Configurable 3+1 phase (VR1: 3/2/1-phase; VR2: 1-phase); larger pin count (56-pin QFN); higher gate drive current | Targeted at high-current CPU + GPU VRMs requiring >60A total; not pin-compatible | Select ISL95835IRZ-T when VR1 needs >30A capability or multi-phase scalability beyond 1-phase |
| RT8803AGQW | Single 1-phase VR with integrated MOSFETs; no SMBus telemetry; fixed 500kHz switching | Entry-level notebooks with non-IMVP-7 CPUs; lacks remote sense and programmable thermal limits | Choose RT8803AGQW only for cost-sensitive, non-compliant platforms where telemetry and accuracy are secondary |
Compared with ISL95837IRZ-T, ISL95835IRZ-T offers scalable phase count but requires PCB redesign and adds cost, while RT8803AGQW sacrifices IMVP-7 compliance and closed-loop telemetry - making ISL95837IRZ-T the optimal balance of standards adherence, integration, and board-space efficiency for dual 1-phase VR12™ designs.
Availability
ISL95837IRZ-T is available at Aetrix Electronics and suitable for high-performance notebook CPU power, VR12™ desktop platforms, embedded dual-power-domain systems, and thin-and-light ultrabook designs requiring stable component supply and long-term lifecycle support.
Supply support for ISL95837IRZ-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 (acquired Intersil in 2017) is a global semiconductor leader specializing in microcontrollers, analog, power management, and connectivity solutions for automotive, industrial, and computing markets.
The ISL95837IRZ-T belongs to Renesas' high-accuracy CPU voltage regulator product line, engineered specifically for IMVP-7/VR12™-compliant computing platforms requiring dual independent 1-phase VR control in minimal footprint.
FAQ
What is the primary function of the ISL95837IRZ-T in CPU power delivery?
The ISL95837IRZ-T serves as a dual 1-phase voltage regulator controller for IMVP-7/VR12™-compliant CPUs. It manages two independent power rails - typically VDD and VCCIO - using integrated gate drivers, SMBus interface, and precision current/voltage sensing. Its R3™ PWM architecture ensures fast transient response and high accuracy, making ISL95837IRZ-T essential for stable operation of modern mobile and desktop processors.
Does the ISL95837IRZ-T support DCR current sensing with temperature compensation?
Yes, the ISL95837IRZ-T supports lossless DCR current sensing on both VR outputs, with built-in support for single NTC thermistor-based temperature compensation. This allows accurate current measurement across temperature without additional sensing resistors. The ISL95837IRZ-T also supports precision resistor-based current sensing as an alternative - giving designers flexibility in inductor selection and thermal design for the ISL95837IRZ-T.
Is the ISL95837IRZ-T pin-compatible with the ISL95835IRZ-T?
No, the ISL95837IRZ-T is not pin-compatible with the ISL95835IRZ-T. The ISL95837IRZ-T uses a 48-pin QFN package optimized for 1+1 phase operation, while the ISL95835IRZ-T uses a 56-pin QFN to accommodate its configurable 3+1 phase architecture and additional gate drive signals. Board layout changes are required when substituting ISL95837IRZ-T for ISL95835IRZ-T or vice versa.
What SMBus commands does the ISL95837IRZ-T support for CPU communication?
The ISL95837IRZ-T supports the full IMVP-7/VR12™ SMBus command set including READ WORD DATA, WRITE WORD DATA, READ BYTE DATA, and BLOCK READ/WRITE for VID code updates, telemetry reporting (voltage, current, temperature), and fault status. It uses standard SMBus addressing and timing - enabling seamless integration with Intel-compatible platform controllers without custom firmware. All ISL95837IRZ-T SMBus functionality is implemented in hardware per FN7671 Rev 1.00.
Can the ISL95837IRZ-T be used in non-IMVP-7/VR12™ applications?
The ISL95837IRZ-T can operate in non-IMVP-7/VR12™ applications as a general-purpose dual 1-phase VR controller, but its SMBus interface, VID decoding, and load-line regulation are optimized for those standards. For non-compliant use, designers must disable or bypass VID-related functions and configure feedback loops manually. While functional, ISL95837IRZ-T's full value - including telemetry, dynamic load-line, and CPU handshake - is realized only in IMVP-7/VR12™ systems.
ISL95837IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Converter, Intel IMVP-7, VR12™
- Voltage - Input:
- 4.5V ~ 5.5V
- Number of Outputs:
- 2
- Voltage - Output:
- Up to 1.52V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (5x5)
ISL95837IRZ-T FAQ
1.How can I place an order for ISL95837IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95837IRZ-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 ISL95837IRZ-T reliable?
The price and inventory of ISL95837IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95837IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL95837IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95837IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95837IRZ-T?
ISL95837IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95837IRZ-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 ISL95837IRZ-T?
For technical support, including ISL95837IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95837IRZ-T requirements.
6.How does Aetrix verify that ISL95837IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95837IRZ-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 ISL95837IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL95837IRZ-T?
All ISL95837IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95837IRZ-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 ISL95837IRZ-T part is unused and in its original packaging.
Return procedure for ISL95837IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL95837IRZ-T Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
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…
