ISL6269 Intersil Corporation, ISL6269 Datasheet

ISL6269

Manufacturer Part Number

ISL6269

Description

Single Phase PWM Controller

Manufacturer

Intersil Corporation

Datasheet

1.ISL6269.pdf (17 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

ISL6269ACRZ

Manufacturer:

INTERSIL

Quantity:

20 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

ISL6269CRZ

Manufacturer:

INTERSIL

Quantity:

Company:

Meier Automation Equipment Co., Limited

Part Number:

ISL6269CRZ

Manufacturer:

INTERSIL

Quantity:

20 000

Company:

BOSTOCK HK LIMITED

Part Number:

ISL6269CRZ-T

Manufacturer:

INTERSIL/PBF

Quantity:

5 999

Company:

Meier Automation Equipment Co., Limited

Part Number:

ISL6269CRZ-T

Manufacturer:

INTERSIL

Quantity:

20 000

Current page: 1 of 17
Download datasheet (421Kb)

www.DataSheet4U.com

Single Phase PWM Controller for Mobile

Graphical Processing Unit (GPU)

The ISL6269 IC is a Single-Phase Synchronous-Buck PWM

controller featuring Intersil's Robust Ripple Regulator (R

technology that delivers truly superior dynamic response to

input voltage and output load transients. Integrated

MOSFET drivers, 5V LDO, and bootstrap diode result in

fewer components and smaller implementation area.

Intersil’s R

frequency PWM and hysteretic PWM while eliminating many

of their shortcomings. R

modulator that synthesizes an AC ripple voltage signal V

analogous to the output inductor ripple current. The AC

signal V

threshold is the error amplifier output V

threshold is a programmable voltage reference V

in generation of the PWM signal. The voltage reference V

sets the steady-state PWM frequency. Both rising and falling

edges of the PWM are modulated, providing faster response

to input voltage transients and output load transients than

conventional fixed-frequency PWM controllers. Unlike a

conventional hysteretic converter, the ISL6269 has an error

amplifier that provides ±1% voltage regulation at the FB pin.

The ISL6269 has a 1.5ms digital soft-start and can be

started into a pre-biased output voltage. A resistor divider is

used to program the output voltage setpoint. The ISL6269

can be configured to operate in forced-continuous-

conduction-mode (FCCM) or in diode-emulation-mode

(DEM), which improves light-load efficiency. In FCCM the

controller always operates as a synchronous rectifier,

switching the low-side MOSFET regardless of the output

load, however with DEM enabled, the low-side MOSFET is

disabled preventing negative current flow from the output

inductor during low load operation. An audio filter prevents

the PWM switching frequency from entering the audible

spectrum due to extremely light load while in DEM.

A PGOOD pin indicates when the converter is capable of

supplying regulated voltage. The ISL6269 features a unique

fault-identification capability that can drastically reduce

trouble-shooting time and effort. The pull-down resistance of

the PGOOD pin is 30Ω for an overcurrent fault, 60Ω for an

overvoltage fault, or 90Ω for either an undervoltage fault or

during soft-start. The overcurrent protection is accomplished

by measuring the voltage drop across the r

low-side MOSFET. A single resistor programs the

overcurrent and short-circuit points. Overvoltage and

undervoltage protection is monitored at the FB voltage

feedback pin.

enters a hysteretic comparator where the lower

technology combines the best features of fixed-

technology employs an innovative

Data Sheet

COMP

DS(ON)

, and the upper

of the

resulting

1-888-INTERSIL or 1-888-468-3774

)

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

Features

• High performance synthetic ripple regulation

• Extremely fast transient response

• External type-two loop compensation

• ±1% regulation accuracy: -10°C to +100°C

• Starts into a pre-biased output

• Wide input voltage range: +7.0V to +25.0V

• Wide output voltage range: +0.6V to +3.3V

• Wide output load range: 0A to 25A

• Programmable PWM frequency: 200kHz to 600kHz

• Power good monitor

• Fault identification by PGOOD pull down resistance

• Integrated MOSFET drivers with shoot-through protection

• Internal digital soft-start

• Internal 5V LDO regulator

• Configure forced continuous conduction or diode

• PWM minimum frequency above audible spectrum

• Integrated boot-strap diode

• Low-side MOSFET r

• Undervoltage protection

• Soft crowbar overvoltage protection

• Over-temperature protection

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• PCI express graphical processing unit

• Auxiliary power rail

• VRM

• Network adapter

emulation for increased light load efficiency

All other trademarks mentioned are the property of their respective owners.

June 14, 2005

Intersil (and design) is a registered trademark of Intersil Americas Inc.

DS(ON)

overcurrent protection

ISL6269

FN9177.0

Related parts for ISL6269

Related keywords

ISL6269 datasheet
ISL6269 data sheet
ISL6269 pdf datasheet
ISL6269 component
ISL6269 part
ISL6269 distributor
ISL6269 RoHS
ISL6269 datasheet download