Features
- Wide Input Supply Voltage Range
- 5.6V to 24V
- 4.5V to 5.6V
- Two Independently Programmable Output Voltages
- Switching Frequency 300kHz
- Out of Phase PWM Controller Operation
- Reduces Required Input Capacitance and Power Supply Induced Loads
- No External Current Sense Resistor
- Uses Lower MOSFET's rDS(ON)
- Programmable Soft-Start
- Extensive Circuit Protection Functions
- PGOOD
- UVLO
- Overcurrent
- Overtemperature
- Independent Shutdown for Both PWMs
- Excellent Dynamic Response
- Voltage Feed-Forward with Current Mode Control
- Pb-Free Plus Anneal Available (RoHS Compliant)
ISL6440 Functional Diagram
Description
The ISL6440 is a high-performance, dual-output PWM controller optimized for converting wall adapter, battery or network intermediate bus DC input supplies into the system supply voltages required for a wide variety of applications. Each output is adjustable down to 0. 8V. The two PWMs are synchronized 180o out of phase reducing the RMS input current and ripple voltage. The ISL6440 incorporates several protection features. An adjustable overcurrent protection circuit monitors the output current by sensing the voltage drop across the lower MOSFET. Hiccup mode overcurrent operation protects the DC/DC components from damage during output overload/short circuit conditions. Each PWM has an independent logic-level shutdown input (SD1 and SD2). A single PGOOD signal is issued when soft-start is complete on both PWM controllers and their outputs are within 10% of the set point. Thermal shutdown circuitry turns off the device if the junction temperature exceeds +150°C.
Applications
- Power Supplies with Two Outputs
- xDSL Modems/Routers
- DSP, ASIC, and FPGA Power Supplies
- Set-Top Boxes
- Dual Output Supplies for DSP, Memory, Logic, µP Core and I/O
- Telecom Systems
| Part Number | Status | Samples | Stock | RoHS | Package | Carrier Type |
|---|---|---|---|---|---|---|
| ISL6440IAZ | Obsolete | N/A | Out of Stock | RoHS:EN | QSOP | Tube |
| ISL6440IAZ-T | Obsolete | N/A | Out of Stock | Contact | QSOP | Reel |
| ISL6440IAZ-TK | Obsolete | N/A | Out of Stock | RoHS:EN | QSOP | Reel |
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- Product Change NoticePDF 398 KB PCN15046 Jan 07, 2016
- Product Change NoticePDF 268 KB PCN13037 Jun 11, 2013
- Application NotePDF 397 KB an1684 Jan 19, 2004AI-generated Summary: The document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design and safety, disclaims liability for damages, and clarifies no intellectual property licenses are granted. Products are categorized by quality grades with specific application recommendations. Users must comply with laws, avoid unauthorized modifications, and ensure safe use within specified conditions. Contact details for Renesas Electronics sales offices worldwide are provided.
- Application NotePDF 509 KB an1681 Jan 19, 2004AI-generated Summary: The document explains grounding techniques for PCB layouts using a dual op amp example on a single-layer copper board. It compares three grounding schemes: a center spine ground trace, an outer ground plane, and a split/star ground plane, highlighting the benefits of single-point grounding to minimize noise and antenna effects. It emphasizes following current paths, minimizing loop lengths, and ensuring close forward and return paths to reduce interference. The document also includes disclaimers on product use, quality grades, safety, and legal compliance.
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- Application NotePDF 397 KB an1684 Jan 19, 2004AI-generated Summary: The document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design and safety, disclaims liability for damages, and clarifies no intellectual property licenses are granted. Products are categorized by quality grades with specific application recommendations. Users must comply with laws, avoid unauthorized modifications, and ensure safe use within specified conditions. Contact details for Renesas Electronics sales offices worldwide are provided.
- Application NotePDF 509 KB an1681 Jan 19, 2004AI-generated Summary: The document explains grounding techniques for PCB layouts using a dual op amp example on a single-layer copper board. It compares three grounding schemes: a center spine ground trace, an outer ground plane, and a split/star ground plane, highlighting the benefits of single-point grounding to minimize noise and antenna effects. It emphasizes following current paths, minimizing loop lengths, and ensuring close forward and return paths to reduce interference. The document also includes disclaimers on product use, quality grades, safety, and legal compliance.
Application Notes & White Papers (2)
- Product Change NoticePDF 398 KB PCN15046 Jan 07, 2016
- Product Change NoticePDF 268 KB PCN13037 Jun 11, 2013
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