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Renesas ISL6227CAZ-TS2698
- Part No.:
- ISL6227CAZ-TS2698
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ISL6227CAZ-TS2698.pdf
- Description:
- IC REG CTRLR DDR 2OUT 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,164
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Product details
Overview
ISL6227CAZ-TS2698 from Renesas (formerly Intersil) is a dual-channel synchronous buck PWM controller optimized for DDR memory and chipset power in notebook PCs. It delivers two independently adjustable outputs (0.9V–5.5V), supports DDR mode with VTT tracking VDDQ/2 and buffered VREF, operates from 5V–28V input, and features automatic PWM/hysteretic mode transition for high efficiency across load ranges.
For engineers reviewing the ISL6227CAZ-TS2698 datasheet, ISL6227CAZ-TS2698 pinout, ISL6227CAZ-TS2698 application, or ISL6227CAZ-TS2698 equivalent, this device is selected for precision dual-rail DC/DC regulation in mobile computing platforms where battery life, transient response, and DDR compliance are critical design requirements.
Technical Context
The ISL6227CAZ-TS2698 integrates two current-mode PWM controllers with voltage feed-forward ramp modulation, enabling fast input and load transient response without complex external compensation. Each channel uses rDS(ON) sensing for overcurrent protection and supports independent soft-start, PGOOD, and enable control.
In DDR mode (DDR pin high), Channel 2 becomes a bidirectional VTT regulator tracking VDDQ/2, while PG2/REF outputs a buffered 1.25V reference; phase shift between channels is dynamically set to 0°, 90°, or 180° based on VIN voltage and DDR state to minimize input ripple and inter-channel interference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 28V - enables direct regulation from Li-ion battery or AC/DC adapter without pre-regulation. |
| Output Voltage Range | 0.9V to 5.5V per channel - supports DDR1/DDR2 VDDQ, chipset core, and graphics rail requirements. |
| PWM Switching Frequency | 300 kHz (±15%) - fixed-frequency operation ensures predictable EMI profile and filter design. |
| VDDQ/VTT Tracking Accuracy | VTT = VDDQ/2 ±1% - meets JEDEC DDR1/DDR2 termination voltage tolerance for signal integrity. |
| Overvoltage Protection | 115% of set point - latches lower MOSFET ON to clamp output during fault, resuming automatically upon recovery. |
| Undervoltage Lockout | 75% of set point - shuts down channel if output collapses, preventing system instability from brownout. |
| Thermal Limit | 125°C junction max - validated for continuous operation in compact notebook thermal envelopes. |
Pinout & Package
ISL6227CAZ-TS2698 is housed in a 28-lead QSOP package (M28.15), Pb-free and RoHS-compliant, with 0.635 mm lead pitch and exposed thermal pad not present (unlike QFN variants).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 / EN2 | Channel enable inputs | Independent TTL-compatible enables; low = shutdown, high = active - allows staggered startup and power sequencing. |
| VSEN1 / VSEN2 | Feedback sense inputs | High-impedance (80 nA bias) inputs for resistive divider - sets output voltage with 0.9V internal reference and ±1% accuracy. |
| PG1 / PG2/REF | Power-good / DDR reference | Open-drain outputs; PG1 indicates CH1 regulation; in DDR mode, PG2/REF sources 10 mA at VDDQ/2 for DDR reference buffer. |
| DDR | Mode select input | Logic-high activates DDR architecture: CH2 becomes bidirectional VTT regulator, OCSET2 repurposed as VDDQ/2 tracking input. |
| ISEN1 / ISEN2 | Current sense inputs | Monitor rDS(ON) voltage drop across low-side MOSFETs - enables lossless OCP without external sense resistor (optional). |
| UGATE1 / UGATE2 | High-side gate drivers | Low-impedance (4–8 Ω pull-up/pull-down) outputs - drive N-channel upper MOSFETs with adaptive dead-time control. |
| LGATE1 / LGATE2 | Low-side gate drivers | Optimized for fast turn-on/turn-off of synchronous rectifiers - minimizes conduction loss and shoot-through risk. |
| VIN | Feed-forward input | Provides input voltage proportional ramp to PWM comparator - improves line regulation and reduces need for loop compensation. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PWM/HYS mode transition | Enables high efficiency at light loads (diode emulation) and stable regulation at heavy loads (CCM), extending battery runtime without manual mode selection. |
| rDS(ON) current sensing | Eliminates external current-sense resistor - reduces BOM cost, PCB area, and power loss while maintaining accurate overcurrent protection. |
| VDDQ/2 tracking with sink/source capability | CH2 regulates VTT to exactly half VDDQ and supplies/sinks current - satisfies DDR termination requirements for bidirectional data bus signaling. |
| Programmable channel phase shift | 0°, 90°, or 180° phase offset between CH1 and CH2 - reduces input capacitor RMS current and system-level conducted EMI. |
| Integrated soft-start with independent timing | 4.5 µA constant-current SOFTx pins - enables controlled ramp-up of each output voltage to prevent inrush current and ensure proper sequencing. |
Applications
| DDR Memory Power Supply | Notebook PC Dual-Rail System |
|---|---|
|
Use Scenario: Providing VDDQ (2.5V), VTT (1.25V), and VREF (1.25V) to DDR1/DDR2 SDRAM modules in ultraportable notebooks. IC Role / Device Role / Timing Role: ISL6227CAZ-TS2698 acts as complete DDR power controller - CH1 regulates VDDQ, CH2 tracks VDDQ/2 as VTT and buffers VREF, all synchronized under DDR pin control. Use Value: Eliminates need for discrete VTT LDO and reference IC; achieves ±1% VTT tracking and 10 mA VREF drive within single 28-pin QSOP. |
Use Scenario: Generating +2.5V for graphics interface and +1.8V for chipset core logic from shared 19.5V battery rail in thin-and-light notebooks. IC Role / Device Role / Timing Role: ISL6227CAZ-TS2698 serves as dual independent buck controller - CH1 and CH2 operate in separate PWM modes with 180° phase shift to reduce input ripple. Use Value: Delivers >90% peak efficiency at 3A load per channel while meeting tight voltage tolerances (±2%) and fast transient response (<50 µs). |
| Tablet PC Core Logic Supply | Handheld Instrument Dual Output |
|
Use Scenario: Powering ARM-based application processor core (1.2V) and I/O (3.3V) from 7.4V dual-cell Li-ion battery in 7-inch tablets. IC Role / Device Role / Timing Role: ISL6227CAZ-TS2698 functions as flexible dual-output regulator - both channels configured in forced PWM mode for noise-sensitive digital loads. Use Value: Enables single-chip solution for asymmetric rail generation with independent enable, soft-start, and PGOOD signals - simplifies power tree design. |
Use Scenario: Supplying ±1.8V analog front-end and 3.3V microcontroller domain in portable test equipment powered by 12V sealed lead-acid battery. IC Role / Device Role / Timing Role: ISL6227CAZ-TS2698 operates as isolated dual buck controller - CH1 powers analog section, CH2 powers digital section with independent fault reporting. Use Value: Provides channel-specific OVP/UVP/OC protection and PGOOD assertion - enhances system reliability during field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6227HRZ | Same die in 28-lead QFN (5×5 mm) package with exposed thermal pad - θJA = 36°C/W vs. 80°C/W for QSOP. | Better thermal performance required for >4A/channel continuous operation; incompatible pinout and layout. | Select ISL6227HRZ only when board space and thermal headroom allow QFN rework and higher assembly cost. |
| RT8205AZSP | Single-chip dual-phase controller with integrated MOSFET drivers but no DDR-specific VTT/VREF functions; 500 kHz switching. | Lacks VDDQ/2 tracking, bidirectional VTT, and buffered DDR reference - unsuitable for DDR memory systems. | Choose RT8205AZSP only for generic dual-output buck applications where DDR compliance is not required. |
Compared with ISL6227CAZ-TS2698, ISL6227HRZ offers superior thermal dissipation in space-constrained designs, while RT8205AZSP provides higher switching frequency but omits DDR-specific regulation features - making ISL6227CAZ-TS2698 uniquely suited for JEDEC-compliant memory power delivery.
Availability
ISL6227CAZ-TS2698 is available at Aetrix Electronics and suitable for notebook PC power design, DDR memory subsystems, and portable industrial instrumentation requiring stable component supply and long-term lifecycle support.
Supply support for ISL6227CAZ-TS2698 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 and maintains full technical and manufacturing continuity for legacy power management ICs including the ISL6227 family.
The ISL6227 product line was designed specifically for high-efficiency, multi-rail DC/DC conversion in mobile computing platforms - emphasizing DDR compliance, battery-aware efficiency modes, and integration to reduce external component count.
FAQ
What is the operating temperature range for the ISL6227CAZ-TS2698?
The ISL6227CAZ-TS2698 is rated for an ambient temperature range of -10°C to +100°C, with a maximum junction temperature of +125°C. This commercial-grade specification aligns with notebook PC chassis thermal profiles and supports reliable operation under sustained CPU/GPU load conditions. The device includes built-in thermal protection that disables output if junction temperature exceeds safe limits.
How does the ISL6227CAZ-TS2698 implement DDR memory power functionality?
The ISL6227CAZ-TS2698 implements DDR power by asserting the DDR pin high, which reconfigures Channel 2 to track VDDQ/2 as VTT and repurposes PG2/REF as a buffered 1.25V reference output. In this mode, OCSET2 accepts a resistor divider from VDDQ to generate the tracking signal, and CH2 actively sinks or sources current to maintain precise termination voltage - fulfilling JEDEC DDR1/DDR2 requirements without external components.
Can the ISL6227CAZ-TS2698 operate with only one channel enabled?
Yes, the ISL6227CAZ-TS2698 supports independent channel control: EN1 and EN2 are separate TTL-compatible inputs, allowing Channel 1 to be active while Channel 2 remains disabled, or vice versa. When only one channel is enabled, the other remains in ultra-low-quiescent shutdown (1 µA ICCSN), minimizing system standby power - a key feature for always-on notebook subsystems.
What protection features does the ISL6227CAZ-TS2698 include?
The ISL6227CAZ-TS2698 integrates overvoltage protection (115% trip), undervoltage lockout (75% trip), cycle-by-cycle overcurrent detection via ISEN pins, and thermal shutdown. Each channel has independent PGOOD monitoring with 84–92% lower and 110–120% upper thresholds. Faults are latched until reset by cycling EN or VCC, ensuring robust system-level fault containment.
Is the ISL6227CAZ-TS2698 pin-compatible with other variants in the ISL6227 family?
Yes, the ISL6227CAZ-TS2698 shares identical 28-lead QSOP pinout and electrical behavior with ISL6227CA, ISL6227IA, and ISL6227IAZ - differing only in temperature grade (-10°C to +100°C vs. -40°C to +100°C) and Pb-free compliance. No PCB redesign is needed when substituting within the same package variant, though thermal and reliability validation must match application requirements.
ISL6227CAZ-TS2698 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
ISL6227CAZ-TS2698 FAQ
1.How can I place an order for ISL6227CAZ-TS2698 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6227CAZ-TS2698 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 ISL6227CAZ-TS2698 reliable?
The price and inventory of ISL6227CAZ-TS2698 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6227CAZ-TS2698 is usually 5 days.
3.What payment methods are accepted for ISL6227CAZ-TS2698?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6227CAZ-TS2698 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6227CAZ-TS2698?
ISL6227CAZ-TS2698 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6227CAZ-TS2698 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 ISL6227CAZ-TS2698?
For technical support, including ISL6227CAZ-TS2698 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6227CAZ-TS2698 requirements.
6.How does Aetrix verify that ISL6227CAZ-TS2698 is sourced from the original manufacturer or authorized distributors?
All ISL6227CAZ-TS2698 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 ISL6227CAZ-TS2698 meets industry standards.
7.What is the process for return or replacement of ISL6227CAZ-TS2698?
All ISL6227CAZ-TS2698 units undergo pre-shipment inspection (PSI). If there is an issue with ISL6227CAZ-TS2698, 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 ISL6227CAZ-TS2698 part is unused and in its original packaging.
Return procedure for ISL6227CAZ-TS2698:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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