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Renesas ISL6442IAZ-TKS2715
- Part No.:
- ISL6442IAZ-TKS2715
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ISL6442IAZ-TKS2715.pdf
- Description:
- IC REG TRPL BUCK/LNR SYNC 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,104
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Product details
Overview
ISL6442IAZ-TKS2715 from Renesas Electronics (formerly Intersil) is a triple-output power controller integrating two 180° out-of-phase voltage-mode PWM buck controllers and one linear controller for broadband, DSL, and networking point-of-load regulation. It delivers ±1.5% reference accuracy, programmable 300kHz–2.5MHz switching frequency, and supports soft-start into pre-biased loads. Used in DSL modems and FPGA/ASIC core supply rails.
For engineers reviewing the ISL6442IAZ-TKS2715 datasheet, ISL6442IAZ-TKS2715 pinout, ISL6442IAZ-TKS2715 application, or ISL6442IAZ-TKS2715 equivalent, key selection criteria include dual PWM phase synchronization, lossless rDS(ON)-based overcurrent protection, independent enable/soft-start per channel, PGOOD with delay, and 24-lead QSOP packaging with RoHS compliance.
Technical Context
The ISL6442IAZ-TKS2715 implements voltage-mode PWM control with dedicated error amplifiers (88 dB DC gain, 15 MHz GBWP) and a sawtooth oscillator whose frequency is set by an external RT resistor. Its dual PWM outputs operate 180° out of phase to reduce input ripple and RMS current draw.
Each PWM channel features independent soft-start via SS1/EN1 and SS2/EN2 pins (30 µA current source, 1.0 V enable threshold, 3.2 V ramp top), hiccup-mode overcurrent protection using upper MOSFET rDS(ON) sensing, and separate OVP/UVP comparators (116%/82% thresholds). The linear controller uses LCDR/LCFB pins to drive an external PNP transistor with 50 mA sink capability and 0.595 V feedback threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5V to 24V (VIN); 5V ±10% (VCC direct supply) |
| Reference Accuracy | ±1.5% over line, load, and -40°C to +85°C temperature range |
| Switching Frequency | Programmable 300 kHz to 2.5 MHz via RT resistor; enables fast transient response and small magnetics |
| Output Regulation | 0.6 V internal reference; supports output voltages ≥0.6 V with external resistor divider |
| Overcurrent Protection | Lossless rDS(ON) sensing; hiccup mode activation after 32 consecutive OC cycles |
| PGOOD Delay | 370 ms typical at 1.4 MHz; inversely proportional to switching frequency (t = 0.5236 / FSW) |
| Thermal Shutdown | 150°C trip point with 20°C hysteresis; protects against sustained overtemperature |
Pinout & Package
ISL6442IAZ-TKS2715 is housed in a 24-lead QSOP (M24.15) package with Pb-free (RoHS-compliant) finish and thermal resistance θJA = 85°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OCSET1, OCSET2 | Overcurrent setpoint inputs | Connect to upper MOSFET drain via ROCSET resistor; 110 µA internal current source sets OC trip based on rDS(ON) |
| SS1/EN1, SS2/EN2 | Soft-start and enable inputs | 30 µA pull-up charges external capacitor; 1.0 V threshold enables channel; 3.2 V ramp completion signals soft-start end |
| FB1, FB2 | PWM feedback inputs | Monitor output voltage via resistor divider; feed error amplifier and PGOOD/OVP/UVP comparators |
| LCFB, LCDR | Linear controller feedback and driver | LCFB sets linear output voltage (0.595 V threshold); LCDR sinks up to 50 mA to drive external PNP pass transistor |
| UGATE1/2, LGATE1/2 | High-side and low-side gate drivers | UGATE: bootstrapped N-channel driver (0.7 A peak, 20 ns rise/fall); LGATE: VCC-sourced N-channel driver |
| PHASE1, PHASE2 | Power switch node connections | Junction of upper MOSFET source, lower MOSFET drain, and output inductor; critical for layout and EMI control |
| PGND, SGND | Power and signal ground returns | PGND carries high-current return paths for gate drivers; SGND is isolated reference for analog circuitry and feedback |
| PGOOD | Open-drain power-good indicator | Asserts high after 370 ms delay when both PWM outputs are within ±10% and linear output >75% of nominal |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase dual PWM | Reduces input RMS current and capacitor stress by ~30% versus in-phase operation |
| Voltage tracking capability | Enables controlled sequencing of multiple rails (e.g., 1.8 V and 3.3 V) using proportional soft-start capacitance |
| Pre-biased soft-start support | Allows seamless ramp-up from existing output voltage without reverse inductor current or overshoot |
| Lossless current sensing | Eliminates external sense resistor; uses MOSFET rDS(ON) for overcurrent detection - improves efficiency and BOM count |
| Independent enable control | Each PWM channel can be enabled/disabled separately post-power-up; both must be released to initiate first startup |
Applications
| DSL Modem Power Management | FPGA Core & I/O Supply |
|---|---|
Use Scenario: Integrated power solution for ADSL/VDSL modems requiring tightly regulated 1.2 V, 1.8 V, and 3.3 V rails with sequencing. IC Role / Device Role / Timing Role: ISL6442IAZ-TKS2715 acts as primary triple-output controller managing all DC/DC conversion and linear bias generation. Use Value: Reduces component count by consolidating three regulators into one IC while enabling voltage tracking for safe FPGA configuration sequencing. | Use Scenario: Point-of-load regulation for Xilinx or Intel FPGA core (VCCINT), auxiliary (VCCAUX), and I/O (VCCIO) supplies. IC Role / Device Role / Timing Role: ISL6442IAZ-TKS2715 provides independently controllable, fast-transient PWM outputs plus a low-noise linear rail for sensitive analog I/O banks. Use Value: Achieves ±1.5% output accuracy across temperature and line variation, critical for FPGA logic stability and signal integrity. |
| Networking Router SoC Supply | Broadband Gateway Baseband |
Use Scenario: Powering multi-core communications processors (e.g., Broadcom BCM63xx) with dynamic voltage scaling requirements. IC Role / Device Role / Timing Role: ISL6442IAZ-TKS2715 delivers two synchronized buck outputs for CPU cores and memory interfaces, plus linear bias for PHY analog sections. Use Value: 180° phase shift minimizes input capacitor ripple current, extending capacitor lifetime in compact router PCB layouts. | Use Scenario: Dual-rail supply for QAM demodulator and FEC decoder ASICs in cable modems and gateways. IC Role / Device Role / Timing Role: ISL6442IAZ-TKS2715 regulates main digital supply (1.2 V) and analog bias rail (3.3 V) with precise tracking and hiccup-mode fault containment. Use Value: Programmable 300 kHz–2.5 MHz switching allows optimization for efficiency (low fSW) or size (high fSW) without redesigning compensation networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-output controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RTQ2132B-QT | Single-chip dual-phase buck + LDO; 4.5–18 V input; fixed 600 kHz fSW; no RT pin; integrated MOSFETs | Targeted at automotive infotainment; AEC-Q100 qualified; lacks independent soft-start and voltage tracking | Choose RTQ2132B-QT only if board space is constrained and integrated FETs are acceptable; not suitable for discrete MOSFET designs requiring rDS(ON) sensing. |
| TPS51220ARUKR | Dual 180° out-of-phase buck controller; 5–24 V input; 300–1000 kHz fSW; no linear controller; uses external current-sense resistors | Designed for notebook CPU VRMs; lacks LDO output and PGOOD delay timing; requires sense resistors | Choose TPS51220ARUKR if linear output is unnecessary and discrete current sensing is preferred; verify compatibility with existing layout due to different pinout and no LCDR/LCFB functionality. |
Compared with RTQ2132B-QT and TPS51220ARUKR, the ISL6442IAZ-TKS2715 uniquely combines dual-phase PWM control, a dedicated linear controller, voltage tracking, and lossless rDS(ON) overcurrent protection - making it optimal for cost-sensitive, discrete-FET broadband infrastructure where sequencing and fault robustness are critical.
Availability
ISL6442IAZ-TKS2715 is available at Aetrix Electronics and suitable for DSL modems, FPGA point-of-load regulation, and broadband gateway applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL6442IAZ-TKS2715 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 connectivity solutions for automotive, industrial, and infrastructure markets.
The ISL6442IAZ-TKS2715 belongs to Renesas' legacy Intersil power management portfolio, designed specifically for high-density, multi-rail DC/DC conversion in broadband access equipment where input ripple reduction and sequencing reliability are essential.
FAQ
What input voltage ranges does the ISL6442IAZ-TKS2715 support?
The ISL6442IAZ-TKS2715 supports two input configurations: 5.5 V to 24 V applied to the VIN pin (enabling internal 5 V VCC regulation), or 5 V ±10% applied directly to the VCC pin. Operation outside these ranges risks damage or undefined behavior, as confirmed by Absolute Maximum Ratings and Recommended Operating Conditions in the FN9204 datasheet.
How does the ISL6442IAZ-TKS2715 implement overcurrent protection without a sense resistor?
The ISL6442IAZ-TKS2715 uses lossless rDS(ON) current sensing: an internal 110 µA current source pulls down the OCSET1 or OCSET2 pin, establishing a voltage threshold. During upper MOSFET conduction, the PHASE node voltage is compared to this threshold; if PHASE falls below OCSET, overcurrent is detected. This eliminates external sense resistors and associated power loss, as detailed in the Protection Mechanisms section of FN9204.
Can the ISL6442IAZ-TKS2715 soft-start into a pre-biased output voltage?
Yes, the ISL6442IAZ-TKS2715 supports monotonic soft-start into pre-biased loads. When the SS/EN ramp voltage is below the existing output voltage, the low-side MOSFET remains disabled until the ramp exceeds that voltage, preventing reverse inductor current and ensuring seamless ramp-up - a feature explicitly verified in Figure 8 and Functional Description of FN9204.
What is the function of the LCDR and LCFB pins on the ISL6442IAZ-TKS2715?
The LCDR pin is an open-drain PNP transistor driver that sinks up to 50 mA to control the base of an external PNP pass transistor. The LCFB pin is the feedback input for the linear regulator, with a 0.595 V threshold (±25 mV over temperature). Together they form a precision low-current linear output, distinct from the two PWM channels - as defined in Pin Descriptions and Block Diagram of FN9204.
How is the PGOOD delay determined for the ISL6442IAZ-TKS2715?
The PGOOD delay for the ISL6442IAZ-TKS2715 is fixed and inversely proportional to switching frequency: tPGOOD = 0.5236 / FSW (seconds), where FSW is in MHz. At 1.4 MHz, delay is 370 ms (typical); at 524 kHz, it extends to 1 second. No external adjustment is possible - this timing relationship is specified in Equation 3 and Figure 9 of FN9204.
ISL6442IAZ-TKS2715 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Topology:
- Step-Down (Buck) Synchronous (2), Linear (LDO) (1)
- Number of Outputs:
- 3
- Frequency - Switching:
- 300kHz ~ 2.55MHz
- Voltage/Current - Output 1:
- Controller
- Voltage/Current - Output 2:
- Controller
- Voltage/Current - Output 3:
- Controller
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QSOP
ISL6442IAZ-TKS2715 FAQ
1.How can I place an order for ISL6442IAZ-TKS2715 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6442IAZ-TKS2715 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 ISL6442IAZ-TKS2715 reliable?
The price and inventory of ISL6442IAZ-TKS2715 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6442IAZ-TKS2715 is usually 5 days.
3.What payment methods are accepted for ISL6442IAZ-TKS2715?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6442IAZ-TKS2715 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6442IAZ-TKS2715?
ISL6442IAZ-TKS2715 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6442IAZ-TKS2715 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 ISL6442IAZ-TKS2715?
For technical support, including ISL6442IAZ-TKS2715 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6442IAZ-TKS2715 requirements.
6.How does Aetrix verify that ISL6442IAZ-TKS2715 is sourced from the original manufacturer or authorized distributors?
All ISL6442IAZ-TKS2715 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 ISL6442IAZ-TKS2715 meets industry standards.
7.What is the process for return or replacement of ISL6442IAZ-TKS2715?
All ISL6442IAZ-TKS2715 units undergo pre-shipment inspection (PSI). If there is an issue with ISL6442IAZ-TKS2715, 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 ISL6442IAZ-TKS2715 part is unused and in its original packaging.
Return procedure for ISL6442IAZ-TKS2715:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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