High-Performance Notebook PWM Controller
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Overview
Description
The ISL6269A IC is a Single-phase Synchronous-Buck PWM controller featuring Intersil's Robust Ripple Regulator R3™ Technology that delivers truly superior dynamic response to input voltage and output load transients. Integrated MOSFET drivers and bootstrap diode result in fewer components and smaller implementation area. Intersil’s R3™ Technology combines the best features of fixed-frequency PWM and hysteretic PWM while eliminating many of their shortcomings. R3™ Technology employs an innovative modulator that synthesizes an AC ripple voltage signal VR, analogous to the output inductor ripple current. The AC signal VR enters a window comparator where the lower threshold is the error amplifier output VCOMP, and the upper threshold is a programmable voltage reference VW, resulting in generation of the PWM signal. The voltage reference VW sets the steady-state PWM frequency. Both edges of the PWM can be modulated in response to input voltage transients and output load transients, much faster than conventional fixed-frequency PWM controllers. Unlike a conventional hysteretic converter, the ISL6269A has an error amplifier that provides ±1% voltage regulation at the FB pin. The ISL6269A has a 1. 5ms digital soft-start and can be started into a prebiased output voltage. A resistor divider is used to program the output voltage setpoint. The ISL6269A can be configured to operate in Continuous Conduction Mode (CCM) or Diode Emulation Mode (DEM), which improves light-load efficiency. In CCM the controller always operates as a synchronous rectifier, however when DEM is enabled, the low-side MOSFET is permitted to stay off, blocking negative current flow into the low-side MOSFET from the output inductor.
Features
- High performance R3™ Technology
- Fast transient response
- ±1% regulation accuracy: -10°C to +100°C and -40°C to +100°C
- Wide input voltage range: +5.0V to +25.0V
- Output voltage range: +0.6V to +3.3V
- Wide output load range: 0A to 25A
- Selectable diode emulation mode for increased light load efficiency
- Programmable PWM frequency: 200kHz to 600kHz
- Prebiased output start-up capability
- Integrated MOSFET drivers and bootstrap diode
- Internal digital soft-start
- Power good monitor
- Fault protection
- Undervoltage protection
- Soft crowbar overvoltage protection
- Low-side MOSFET rDS(ON) overcurrent protection
- Over-temperature protection
- Fault identification by PGOOD pull down resistance
- Pb-free (RoHS compliant)
Applications
Applications
- PCI express graphical processing unit
- Auxiliary power rail
- VRM
- Network adapter
Documentation
| Document title | Document type
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Date Date | |
|---|---|---|---|
| PDF 793 KB | Datasheet | ||
| PDF 509 KB | Application Note | ||
| PDF 397 KB | Application Note | ||
| PDF 303 KB | Other | ||
| PDF 169 KB | Product Change Notice | ||
| PDF 202 KB | Product Change Notice | ||
| PDF 326 KB | Product Change Notice | ||
| PDF 398 KB | Product Change Notice | ||
| PDF 106 KB | Product Change Notice | ||
| PDF 173 KB | Product Change Notice | ||
| PDF 79 KB | Product Change Notice | ||
| PDF 248 KB | Product Change Notice | ||
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Design & Development
Software & Tools
Software & Tools
| Software title
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Software type
|
Company
|
|---|---|---|
| iSim:PE Offline Simulation Tool iSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs.
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Simulator | Renesas |
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Boards & Kits
Boards & Kits
High-Performance Notebook PWM Controller Evaluation Board
The ISL6269AEVAL2Z evaluation board is used to demonstrate the performance of the ISL6269A single-phase synchronous buck PWM controller featuring Renesas' Robust Ripple...
Featured Documents:
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Product Options
Processing table
| QFN | Tube | 750 | Get Samples, | |
ISL6269ACRZ-T Active Samples Available |
QFN | Reel | 6000 | Get Samples, |
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