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Renesas IW676-00
- Part No.:
- IW676-00
- Manufacturer:
- Renesas
- Package:
- SOT-23-6
- Datasheet:
-
IW676-00.pdf
- Description:
- IC REG FLYBACK ADJ 3A SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,444
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Product details
Overview
The IW676-00 from Renesas Electronics is a digital synchronous rectifier (SR) controller for discontinuous conduction mode (DCM) flyback converters, featuring lossless VDS sensing, integrated MOSFET gate driver, 3–25V output voltage support, 100V drain voltage sensing capability, and operation down to sub-3V in Direct Charge applications. It replaces secondary-side rectifier diodes to reduce conduction losses in compact AC/DC adapters.
For engineers reviewing the IW676-00 datasheet, IW676-00 pinout, IW676-00 application, or IW676-00 equivalent, key selection considerations include its SOT23-6 package, absence of Active Voltage Positioning (AVP), no internal GND tie on SOURCE pin, ultra-low no-load current capability, and compatibility with primary-side controllers like iW1602 and iW1782 in multi-level USB PD and QC3.0 designs.
Technical Context
The IW676-00 implements digital adaptive turn-off control to minimize deadtime without requiring an external Schottky diode, using lossless drain-source voltage sensing to determine MOSFET switching timing. Its pulse linear regulator (PLR) enables stable operation at output voltages as low as 2.4V under constant-current mode.
This variant lacks the Active Voltage Positioning (AVP) function found in -3X/-3XC versions, resulting in higher no-load power consumption than AVP-equipped variants but retaining full 3–25V output range support, 100V drain sensing, and compatibility with iW1780H-30 in Direct Charge topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage range | 3V to 25V - supports multi-level USB PD and QC3.0 adapter outputs without external scaling. |
| Drain voltage sensing limit | −1.5V to 100V - eliminates need for external clamping circuits in ≤12V multi-output systems. |
| VIN operating range | −0.3V to 33V - accommodates wide-input bias sourcing from adapter output rails. |
| Gate peak output current | ±3A - drives standard 5V logic-level SR MOSFETs with fast edge rates and robust drive strength. |
| Operating junction temperature | −40°C to +150°C - qualified for high-density charger environments with minimal thermal derating. |
| No-load operating current | Ultra-low (not quantified in IW676-00 spec sheet; <30mW achieved in 5V/2.5A adapter with iW1602) - enables Energy Star Tier 2 and CoC v5 compliance. |
| Package | SOT23-6 - surface-mount footprint compatible with automated assembly and space-constrained mobile adapter PCBs. |
Pinout & Package
Package: 6-pin SOT23, 1.6mm × 2.9mm body, 0.95mm height, 0.95mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DRAIN (Pin 1) | Analog input / PLR input | Senses SR MOSFET drain voltage for lossless timing control; also serves as PLR input for sub-3V operation. |
| SOURCE (Pin 2) | Analog input | Senses SR MOSFET source voltage; not internally tied to GND (unlike IW676-00C), requiring external connection to MOSFET source node. |
| OUT (Pin 3) | Driver output | High-current gate driver output (±3A peak) directly controls external N-channel SR MOSFET. |
| GND (Pin 4) | Ground reference | Primary ground return for internal logic, driver, and sensing circuitry; must be low-impedance connection. |
| VCC (Pin 5) | Internal LDO output | 5V-regulated supply for internal circuitry; requires local 1µF ceramic decoupling capacitor. |
| VIN (Pin 6) | Bias input / output sensing | Accepts adapter output voltage (3–25V); powers internal LDO and enables SR based on output voltage level. |
Key Features
| Feature | Design Value |
|---|---|
| Digital adaptive turn-off control | Minimizes deadtime between SR MOSFET turn-off and freewheeling diode conduction, eliminating need for parallel Schottky diode. |
| Lossless VDS sensing | Enables precise MOSFET timing without current-sense resistors or auxiliary windings, reducing BOM count and layout complexity. |
| Pulse Linear Regulator (PLR) | Extends functional operation down to sub-3V output levels in Direct Charge applications, supporting USB-C CC logic and battery charging paths. |
| Integrated 5V gate driver | Delivers ±3A peak current to drive standard logic-level N-channel MOSFETs with minimal external components. |
| Wide VIN range (−0.3V to 33V) | Supports direct biasing from diverse output rails including 5V, 9V, 12V, 15V, and 20V USB PD profiles without external regulators. |
Applications
| USB PD Compact Adapter | Qualcomm® Quick Charge™ 3.0 Charger |
|---|---|
Use Scenario: 5V/9V/12V/15V/20V USB PD 3.0 adapter for smartphones and tablets with <30mW no-load power. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier controller coordinating with iW1602 primary-side IC to manage DCM flyback timing and gate drive. Use Value: Enables >94% efficiency across full load range and meets DOE Level VI/CoC v5 no-load requirements without auxiliary diode. | Use Scenario: Multi-level output charger supporting QC3.0 negotiation (3.6–20V) with dynamic voltage stepping and constant-current regulation. IC Role / Device Role / Timing Role: SR controller interfacing with iW1782 primary and iW636 secondary controllers to maintain tight output regulation during voltage transitions. Use Value: Achieves <20mW no-load power while sustaining fast transient response and sub-30mV load regulation across all QC3.0 output steps. |
| Direct Charge System | Low-Voltage Industrial DC-DC Module |
Use Scenario: USB-C Direct Charge implementation using VBUS switch and MD interface (D+/D− or CC1/CC2) with iW1780H-30 primary controller. IC Role / Device Role / Timing Role: SR controller managing secondary-side rectification during sub-5V battery charging phases where output drops below 3V. Use Value: Pulse Linear Regulator allows continuous SR operation down to 2.4V in CC mode, improving charge efficiency over diode-based solutions. | Use Scenario: Isolated 3.3V or 5V industrial DC-DC module requiring high efficiency at light loads and robust ESD tolerance in harsh environments. IC Role / Device Role / Timing Role: Synchronous rectifier controller replacing Schottky diode in DCM flyback, leveraging 100V drain sensing for reliability under line transients. Use Value: ±2000V HBM ESD rating and −40°C to +150°C junction range ensure long-term reliability in unregulated industrial power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous rectifier controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NCP4306DR2G | Fixed-frequency analog SR controller; no digital adaptive turn-off; max 30V output; no PLR for sub-3V operation. | Lacks Direct Charge support and multi-level QC3.0 transient optimization; suited for fixed-output 5V/12V adapters only. | Select when cost-sensitive, single-output designs prioritize simplicity over ultra-low no-load power or sub-3V operation. |
| Diodes Incorporated AP34103AW6-7 | Digital SR controller with AVP; supports 3–24V output; includes internal GND tie on SOURCE pin (like IW676-00C); no sub-3V PLR. | Offers faster load transient response via AVP but cannot operate below 3V; requires different PCB layout due to internal SOURCE-GND bond. | Prefer for new designs needing AVP and <20mW no-load power, provided system output stays ≥3V and layout accommodates SOURCE-GND tie. |
Compared with IW676-00, NCP4306DR2G trades digital precision for analog simplicity and lower cost, while AP34103AW6-7 adds AVP and simplifies layout but sacrifices Direct Charge capability - making IW676-00 uniquely suitable for sub-3V battery charging paths in legacy-compatible designs.
Availability
IW676-00 is available at Aetrix Electronics and suitable for compact AC/DC adapters, Qualcomm® Quick Charge™ 3.0 chargers, and Direct Charge systems requiring stable component supply despite its "Not Recommended for New Designs" status.
Supply support for IW676-00 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 trusted embedded design innovation, with expertise in microcontrollers, analog, power management, and timing solutions.
The iW676 product line delivers digital synchronous rectifier control optimized for high-efficiency, multi-level USB power delivery and fast-charging applications in space-constrained adapters and chargers.
FAQ
What is the primary function of the IW676-00 in a flyback power supply?
The IW676-00 functions as a digital synchronous rectifier controller that replaces the secondary-side output diode in discontinuous conduction mode (DCM) flyback converters. It senses the SR MOSFET's drain-source voltage to precisely time gate drive signals, reducing conduction losses and improving overall efficiency. The IW676-00 achieves this without auxiliary components like Schottky diodes or current-sense resistors, and supports output voltages from 3V to 25V.
Does the IW676-00 include Active Voltage Positioning (AVP) functionality?
No, the IW676-00 does not include Active Voltage Positioning (AVP). Per Renesas' ordering information, AVP is only present in the -3X and -3XC variants (e.g., IW676-30C). The IW676-00 is explicitly designated as the non-AVP version, resulting in slower dynamic load response and higher no-load power compared to AVP-enabled variants - a trade-off accepted for legacy compatibility and Direct Charge use cases.
What is the significance of the SOURCE pin configuration in the IW676-00 versus the IW676-00C?
In the IW676-00, the SOURCE pin (Pin 2) is an analog input requiring external connection to the SR MOSFET source node. In contrast, the IW676-00C internally connects SOURCE to GND. This difference means IW676-00 designs must route the MOSFET source to Pin 2, while IW676-00C allows simplified layout with SOURCE left unconnected. Using IW676-00C in an IW676-00 layout may cause malfunction due to floating SOURCE detection.
Can the IW676-00 operate reliably at output voltages below 3V?
Yes, the IW676-00 supports Direct Charge applications down to sub-3V levels using its integrated Pulse Linear Regulator (PLR). Under constant-current (CC) mode, it operates down to 2.4V - confirmed in Renesas' Product Summary - enabling efficient rectification during the final stages of USB-C battery charging where output voltage collapses below 3V. This capability is absent in most competing SR controllers.
Why is the IW676-00 marked "Not Recommended for New Designs"?
The IW676-00 is marked "Not Recommended for New Designs" because Renesas has introduced the IW676-00C as its drop-in replacement, which features an internally grounded SOURCE pin for simplified layout and improved manufacturability. While functionally identical in core SR control, the IW676-00C reduces design risk and assembly complexity. However, IW676-00 remains valid for existing designs, especially those requiring the external SOURCE connection for specific sensing configurations or legacy qualification.
IW676-00 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Flyback
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- 25V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- 25V
- Current - Output:
- 3A
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
IW676-00 FAQ
1.How can I place an order for IW676-00 through Aetrix?
Please submit a Request for Quotation (RFQ) for IW676-00 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 IW676-00 reliable?
The price and inventory of IW676-00 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IW676-00 is usually 5 days.
3.What payment methods are accepted for IW676-00?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IW676-00 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IW676-00?
IW676-00 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IW676-00 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 IW676-00?
For technical support, including IW676-00 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IW676-00 requirements.
6.How does Aetrix verify that IW676-00 is sourced from the original manufacturer or authorized distributors?
All IW676-00 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 IW676-00 meets industry standards.
7.What is the process for return or replacement of IW676-00?
All IW676-00 units undergo pre-shipment inspection (PSI). If there is an issue with IW676-00, 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 IW676-00 part is unused and in its original packaging.
Return procedure for IW676-00:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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