ISL6269B
®
Data Sheet
August 7, 2006
FN6280.1
High-Performance Notebook PWM
Features
Controller with Audio-Frequency Clamp
3
• High performance R technology
The ISL6269B 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 and bootstrap diode result in
fewer components and smaller implementation area.
• Fast transient response
3
• ±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
3
Intersil’s R technology combines the best features of fixed-
frequency PWM and hysteretic PWM while eliminating many
of their shortcomings. R technology employs an innovative
• Selectable diode emulation mode for increased light load
efficiency
3
modulator that synthesizes an AC ripple voltage signal V ,
analogous to the output inductor ripple current. The AC signal
R
• Programmable PWM frequency: 200kHz to 600kHz
• Pre-biased output start-up capability
• Integrated MOSFET drivers and bootstrap diode
• Internal digital soft-start
V
enters a window comparator where the lower threshold is
R
the error amplifier output V
, and the upper threshold is a
COMP
programmable voltage reference V resulting in generation
W,
of the PWM signal. The voltage reference V sets the steady-
W
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 ISL6269B has an error amplifier that provides
±1% voltage regulation at the FB pin.
• Power good monitor
• PWM minimum frequency above audible spectrum
• Fault protection
- Undervoltage protection
- Soft crowbar overvoltage protection
- Low-side MOSFET r
overcurrent protection
DS(on)
- Over-temperature protection
The ISL6269B 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 ISL6269B
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.
- 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
Pinout
ISL6269B (4x4 QFN)
Ordering Information
TOP VIEW
PART
PKG.
DWG. #
PART NUMBER MARKING TEMP (°C)
PACKAGE
ISL6269BCRZ
(See Note)
6269BCRZ -10 to +100 16 Ld 4x4 QFN L16.4x4
(Pb-Free)
16 15 14 13
PVCC
LG
1
2
3
4
12
11
VIN
VCC
FCCM
EN
ISL6269BCRZ-T 6269BCRZ 16 Ld 4x4 QFN Tape and
(See Note) Reel (Pb-Free)
L16.4x4
GND
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.
10 PGND
ISEN
9
5
6
7
8
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
1
All other trademarks mentioned are the property of their respective owners.
5秒后页面跳转
SK海力士量产12层HBM3E，容量高达36GB
意法半导体传感器驱动Sphere，开启沉浸式电影新时代
摩尔斯微电子在美国约书亚树国家公园测试 Wi-Fi HaLow
贸泽上架Tallysman TW5386智能GNSS天线
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
