Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

Renesas ISL6227CA-T

Name: ISL6227CA-T
Brand: Renesas
SKU: ISL6227CA-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ISL6227CA-T

Manufacturer:: Renesas

Category:: Special Purpose Regulators

Package:: 28-SSOP (0.154", 3.90mm Width)

Datasheet:: ISL6227CA-T.pdf

Description:: IC REG CTRLR DDR 2OUT 28SSOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,425

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ISL6227CA-T from Renesas (formerly Intersil) is a dual-channel synchronous buck PWM controller optimized for notebook PC power systems. It delivers precision regulation for DDR memory (VDDQ/VTT tracking), chipsets, and graphics subsystems with input range 5V–28V, 300kHz fixed-frequency PWM or light-load hysteretic mode, and r_DS(ON)-based current sensing. Its DDR mode enables VTT sourcing/sinking and buffered VREF generation.

For engineers reviewing the ISL6227CA-T datasheet, ISL6227CA-T pinout, ISL6227CA-T application, or ISL6227CA-T equivalent, key selection criteria include dual-channel phase-shift control (0°/90°/180°), independent PGOOD per channel in dual mode, DDR-specific VTT tracking accuracy, and integrated overvoltage/undervoltage/overcurrent protection with latch-off behavior.

Technical Context

The ISL6227CA-T implements voltage-feed-forward current-mode control with internal compensation, enabling fast transient response across wide LC filter selections. Its dual PWM channels support independent soft-start, mode selection (PWM-only or adaptive HYS/PWM), and programmable overcurrent thresholds via OCSET pins.

In DDR mode, CH2 operates as a VTT tracker with VDDQ/2 reference buffering, while CH1 generates the sole PGOOD signal. Phase synchronization is dynamically determined by VIN voltage level relative to 4.2V when DDR = 1, enabling 0°, 90°, or 180° inter-channel offset to minimize input ripple and EMI.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	5V to 28V - supports direct battery input from Li-ion packs or AC/DC adapters without pre-regulation.
PWM Switching Frequency	300 kHz ±15% - fixed-frequency operation ensures predictable EMI profile and simplifies filter design.
Output Voltage Range	0.9V to 5.5V - programmable per channel via external resistor dividers for multi-rail system flexibility.
VDDQ/VTT Tracking Accuracy	±1% VREF (0.9V) - enables precise DDR1/DDR2 termination voltage generation with buffered VDDQ/2 output.
Overvoltage Protection Threshold	115% of set point - clamps output by holding lower MOSFET on, ensuring safe recovery without external circuitry.
Thermal Resistance θ_JA	80°C/W - specified for 28-lead QSOP package, defining maximum power dissipation under standard PCB layout conditions.
Operating Temperature Range	−10°C to +100°C - qualified for commercial-grade notebook and tablet PC thermal environments.

Pinout & Package

ISL6227CA-T is housed in a 28-lead QSOP (Quad Small Outline Package) with 0.65 mm lead pitch and exposed pad thermal enhancement per package drawing M28.15.

Pin/Terminal	Circuit Role	Design Meaning
EN1 / EN2	Channel enable inputs	Independent logic-level control (2.0V min high, 0.8V max low) for sequencing or fault isolation of each buck converter.
VSEN1 / VSEN2	Feedback voltage sense inputs	High-impedance (80 nA bias) inputs monitoring resistive divider outputs to regulate VOUT1/VOUT2 with ±1% reference accuracy.
PG1 / PG2/REF	Power-good outputs	Open-drain signals indicating regulation status; PG2/REF serves dual role as PGOOD2 in dual mode or VDDQ/2 buffer output in DDR mode.
OCSET1 / OCSET2	Overcurrent threshold programming	Buffered 0.9V reference pins - resistor-to-ground sets current limit via r_DS(ON) sensing or external sense resistor.
DDR	Mode select input	Logic-high (≥3V) configures IC as complete DDR solution: enables VTT tracking, VREF buffering, and VIN-dependent phase shift.
UGATE1 / UGATE2	Upper MOSFET gate drivers	Capable of driving high-side N-channel MOSFETs with 4Ω pull-up / 2.3Ω pull-down resistance at VCC = 5V.
LGATE1 / LGATE2	Lower MOSFET gate drivers	Low-side drivers with 4Ω pull-up / 1.1Ω pull-down resistance, optimized for synchronous rectification efficiency.
VIN	Input voltage feed-forward input	Provides ramp modulation proportional to input voltage (125 mV/V ≥4.2V; 250 mV/V ≤4.1V), improving line transient rejection.

Key Features

Feature	Design Value
Dual independent soft-start	Each channel uses dedicated SOFT1/SOFT2 pins with 4.5 µA current source and 0.9V/1.5V thresholds for controlled ramp-up and PGOOD enable timing.
Adaptive HYS/PWM mode transition	Automatic switch between fixed-frequency PWM (heavy load) and diode-emulation hysteretic mode (light load) per channel to maximize efficiency across full load range.
r_DS(ON) current sensing	Eliminates need for external sense resistors by using lower MOSFET's on-resistance as current-sense element - reduces BOM cost and board space.
DDR-specific VTT sourcing/sinking	CH2 delivers bidirectional current to DDR termination bus, supporting both charge and discharge during memory read/write cycles without external components.
Integrated protection suite	Per-channel overvoltage (115%), undervoltage (75%), overcurrent (programmable), and VCC UVLO (4.14V/4.45V) with automatic recovery or latched shutdown based on fault type.

Applications

Notebook PC Dual-Rail Power	DDR Memory Power Supply
Use Scenario: Providing separate 2.5V and 1.8V rails for memory and graphics interface in ultraportable notebooks with battery input (5–28V). IC Role / Device Role / Timing Role: Dual-channel synchronous buck controller managing independent voltage regulation, soft-start sequencing, and inter-channel phase shift to reduce input ripple. Use Value: Enables compact, high-efficiency dual-output power stage with no external compensation required and minimal external component count.	Use Scenario: Generating VDDQ (2.5V), VTT (1.25V), and VREF (1.25V) for DDR1/DDR2 SDRAM modules in mobile computing platforms. IC Role / Device Role / Timing Role: DDR-configured power controller delivering VTT tracking with sourcing/sinking capability and buffered VDDQ/2 reference output. Use Value: Eliminates need for discrete op-amps or tracking LDOs - achieves ±1% VTT accuracy and fast transient response matching DDR timing requirements.
Chipset Core Voltage Regulation	Graphics Subsystem Power
Use Scenario: Delivering tightly regulated core voltage (e.g., 1.2V @ 5A) to Intel/AMD chipset northbridge or platform controller hub under dynamic load conditions. IC Role / Device Role / Timing Role: High-bandwidth current-mode buck controller with voltage feed-forward and internal loop compensation for rapid load-step response. Use Value: Maintains output voltage within ±2% during 0–5A load transients, preventing chipset reset or data corruption during burst activity.	Use Scenario: Supplying GPU core voltage (e.g., 1.0V @ 4A) and I/O voltage (1.8V) in discrete or integrated graphics solutions with thermal constraints. IC Role / Device Role / Timing Role: Dual-channel controller operating CH1 in forced PWM mode for stable GPU core rail and CH2 in adaptive HYS/PWM for efficient I/O rail. Use Value: Achieves >90% peak efficiency across 10mA–4A load range while maintaining <50 mV output deviation during 3A/µs GPU load steps.

Notebook PC Dual-Rail Power

DDR Memory Power Supply

Use Scenario: Providing separate 2.5V and 1.8V rails for memory and graphics interface in ultraportable notebooks with battery input (5–28V).

IC Role / Device Role / Timing Role: Dual-channel synchronous buck controller managing independent voltage regulation, soft-start sequencing, and inter-channel phase shift to reduce input ripple.

Use Value: Enables compact, high-efficiency dual-output power stage with no external compensation required and minimal external component count.

Use Scenario: Generating VDDQ (2.5V), VTT (1.25V), and VREF (1.25V) for DDR1/DDR2 SDRAM modules in mobile computing platforms.

IC Role / Device Role / Timing Role: DDR-configured power controller delivering VTT tracking with sourcing/sinking capability and buffered VDDQ/2 reference output.

Use Value: Eliminates need for discrete op-amps or tracking LDOs - achieves ±1% VTT accuracy and fast transient response matching DDR timing requirements.

Chipset Core Voltage Regulation

Graphics Subsystem Power

Use Scenario: Delivering tightly regulated core voltage (e.g., 1.2V @ 5A) to Intel/AMD chipset northbridge or platform controller hub under dynamic load conditions.

IC Role / Device Role / Timing Role: High-bandwidth current-mode buck controller with voltage feed-forward and internal loop compensation for rapid load-step response.

Use Value: Maintains output voltage within ±2% during 0–5A load transients, preventing chipset reset or data corruption during burst activity.

Use Scenario: Supplying GPU core voltage (e.g., 1.0V @ 4A) and I/O voltage (1.8V) in discrete or integrated graphics solutions with thermal constraints.

IC Role / Device Role / Timing Role: Dual-channel controller operating CH1 in forced PWM mode for stable GPU core rail and CH2 in adaptive HYS/PWM for efficient I/O rail.

Use Value: Achieves >90% peak efficiency across 10mA–4A load range while maintaining <50 mV output deviation during 3A/µs GPU load steps.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel buck controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
RT8205AZSP	Single-chip dual-phase controller with integrated high/low-side MOSFETs; fixed 500kHz switching frequency; no DDR-specific VTT tracking or VREF buffering.	Suitable for general-purpose dual-rail DC/DC but not DDR memory termination; requires external VREF generation for DDR applications.	Select RT8205AZSP only when integrated FETs and higher switching frequency are prioritized over DDR compliance and VTT sourcing capability.
TPS51220ARGER	TI dual-channel controller with DDR-specific VTT tracking, VREF output, and 300kHz PWM; supports −40°C to +85°C industrial temp range vs. ISL6227CA-T's −10°C to +100°C.	Functionally compatible DDR power solution but rated for narrower ambient temperature range and different package (24-pin QFN vs. 28-pin QSOP).	Choose TPS51220ARGER when industrial temperature rating is required and QFN packaging is preferred, accepting trade-offs in thermal resistance (θ_JA = 45°C/W) and pin count reduction.

Compared with RT8205AZSP and TPS51220ARGER, the ISL6227CA-T uniquely combines DDR-compliant VTT sourcing/sinking, buffered VREF, and wide-input-voltage operation in a thermally robust QSOP package-making it optimal for commercial-grade notebook platforms requiring proven DDR1/DDR2 power integrity.

Availability

ISL6227CA-T is available at Aetrix Electronics and suitable for notebook PCs, tablet PCs, and handheld portable instruments requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for ISL6227CA-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 products for automotive, industrial, infrastructure, and IoT applications.

The ISL6227CA-T belongs to Renesas' legacy Intersil power management portfolio, specifically designed for high-efficiency, multi-rail DC/DC conversion in mobile computing platforms with emphasis on DDR memory compliance and battery-input operation.

FAQ

What is the primary function of the DDR pin on the ISL6227CA-T?

The DDR pin on the ISL6227CA-T configures the device between dual independent buck controller mode (DDR = low) and complete DDR memory power solution mode (DDR = high). When asserted, it enables VTT tracking of VDDQ/2, activates the buffered VREF output on PG2/REF, and modifies phase-shift behavior based on VIN voltage level - all essential for DDR1/DDR2 compliance.

How does the ISL6227CA-T achieve high efficiency across light and heavy loads?

The ISL6227CA-T achieves high efficiency by automatically transitioning between constant-frequency PWM mode (at heavy loads) and hysteretic diode-emulation mode (at light loads) per channel. This adaptive operation minimizes switching losses during light-load conditions while maintaining tight regulation and fast transient response under full load - extending battery life in portable systems without sacrificing performance.

Can the ISL6227CA-T be used for non-DDR applications such as generic dual-rail power supplies?

Yes, the ISL6227CA-T can be used for generic dual-rail power supplies by holding the DDR pin low. In this configuration, both channels operate as independent synchronous buck controllers with programmable output voltages (0.9V–5.5V), selectable phase shift (0°/90°/180°), and individual PGOOD, soft-start, and protection functions - making it suitable for chipset, GPU, or peripheral rail generation in notebooks and embedded systems.

What protection features are integrated into the ISL6227CA-T?

The ISL6227CA-T integrates per-channel overvoltage protection (115% trip), undervoltage lockout (75% trip with latch-off), adjustable overcurrent protection via OCSET pins, and VCC UVLO (4.14V/4.45V thresholds). It also includes adaptive dead-time control and diode-emulation logic to prevent shoot-through and circulating currents - providing comprehensive fault coverage without external supervision circuitry.

What package type and thermal characteristics apply to the ISL6227CA-T?

The ISL6227CA-T is supplied in a 28-lead QSOP package (M28.15 drawing) with θ_JA = 80°C/W under standard JEDEC test conditions. This package supports surface-mount assembly, Pb-free (RoHS-compliant) reflow profiles, and provides adequate thermal performance for typical notebook power stage power dissipation up to ~1.5W per channel with appropriate PCB copper area.

ISL6227CA-T Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 28-SSOP (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Applications:: Controller, DDR

Voltage - Input:: 5V ~ 28V

Number of Outputs:: 2

Voltage - Output:: 0.9V ~ 5.5V

Operating Temperature:: -10°C ~ 100°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 28-SSOP/QSOP

ISL6227CA-T FAQ

1.How can I place an order for ISL6227CA-T through Aetrix?

Please submit a Request for Quotation (RFQ) for ISL6227CA-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 ISL6227CA-T reliable?

The price and inventory of ISL6227CA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6227CA-T is usually 5 days.

3.What payment methods are accepted for ISL6227CA-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6227CA-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ISL6227CA-T?

ISL6227CA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ISL6227CA-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 ISL6227CA-T?

For technical support, including ISL6227CA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6227CA-T requirements.

6.How does Aetrix verify that ISL6227CA-T is sourced from the original manufacturer or authorized distributors?

All ISL6227CA-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 ISL6227CA-T meets industry standards.

7.What is the process for return or replacement of ISL6227CA-T?

All ISL6227CA-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6227CA-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 ISL6227CA-T part is unused and in its original packaging.

Return procedure for ISL6227CA-T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

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.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

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…