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ISL6268 PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 ISL6268
部品説明 High-Performance Notebook PWM Controller
メーカ Intersil Corporation
ロゴ Intersil Corporation ロゴ 



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ISL6268 Datasheet, ISL6268 PDF,ピン配置, 機能
®
Data Sheet
August 22, 2006
ISL6268
FN6348.0
High-Performance Notebook PWM
Controller
The ISL6268 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 ISL6268 has an error
amplifier that provides ±1% voltage regulation at the FB pin.
The ISL6268 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 ISL6268
normally operates in continuous-conduction-mode (CCM),
automatically entering diode-emulation-mode (DEM) at low
load for optimum efficiency. In CCM the converter operates
as a synchronous rectifier. In DEM the low-side MOSFET
stays off, blocking negative current flow from the output
inductor.
Pinout
ISL6268 (16 LD SSOP)
TOP VIEW
PHASE 1
PGOOD 2
VIN 3
VCC 4
EN 5
COMP 6
FB 7
GND 8
16 UG
15 BOOT
14 PVCC
13 LG
12 PGND
11 ISEN
10 VO
9 FSET
Features
• High performance R3 technology
• Fast transient response
• ±1% regulation accuracy: -10°C to +100°C
• Wide input voltage range: +7.0V to +25.0V
• Output voltage range: +0.6V to +3.3V
• Wide output load range: 0A to 25A
• Diode emulation mode for increased light load efficiency
• Programmable PWM frequency: 200kHz to 600kHz
• Pre-biased 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 r DS(on) overcurrent protection
- Over-temperature protection
- Fault identification by PGOOD pull-down resistance
• Pb-free plus anneal available (RoHS compliant)
Applications
• PCI express graphical processing unit
• Auxiliary power rail
• VRM
• Network adapter
Ordering Information
PART
PART
PKG.
NUMBER MARKING TEMP (°C) PACKAGE DWG. #
ISL6268CAZ 6268CAZ -10 to +100 16 Ld QSOP M16.15A
(Note)
(Pb-free)
ISL6268CAZ-T 6268CAZ 16 Ld QSOP Tape and
(Note)
Reel (Pb-free)
M16.15A
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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