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參數(shù)資料
| 型號(hào)： | ISL6269 |
| 廠商： | Intersil Corporation |
| 英文描述： | Single Phase PWM Controller for Mobile Graphical Processing Unit (GPU) |
| 中文描述： | 單相PWM控制器，移動(dòng)圖形處理單元（GPU） |
| 文件頁(yè)數(shù)： | 1/17頁(yè) |
| 文件大?。?/td> | 395K |
| 代理商： | ISL6269 |
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1
FN9177.0
ISL6269
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
3
)
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
3
technology combines the best features of fixed-
frequency PWM and hysteretic PWM while eliminating many
of their shortcomings. R
3
technology employs an innovative
modulator that synthesizes an AC ripple voltage signal V
R
,
analogous to the output inductor ripple current. The AC
signal V
R
enters a hysteretic comparator where the lower
threshold is the error amplifier output V
COMP
, and the upper
threshold is a programmable voltage reference V
W,
resulting
in generation of the PWM signal. The voltage reference V
W
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 30
for an overcurrent fault, 60
for an
overvoltage fault, or 90
for either an undervoltage fault or
during soft-start. The overcurrent protection is accomplished
by measuring the voltage drop across the r
DS(ON)
of the
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.
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
emulation for increased light load efficiency
PWM minimum frequency above audible spectrum
Integrated boot-strap diode
Low-side MOSFET r
DS(ON)
overcurrent protection
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
Data Sheet
June 14, 2005
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. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6269_06 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:High-Performance Notebook PWM Controller with Bias Regulator and Audio-Frequency Clamp |
| ISL6269A | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:High-Performance Notebook PWM Controller |
| ISL6269ACRZ | 功能描述:IC REG CTRLR BUCK PWM 16-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:Robust Ripple Regulator™ (R³) 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6269ACRZ-T | 功能描述:IC REG CTRLR BUCK PWM 16-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:Robust Ripple Regulator™ (R³) 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6269ACRZ-TR5453 | 制造商:Intersil Corporation 功能描述:STD. ISL6269ACRZ-T WITH GOLD BOND WIRE ONLY, T&R - Tape and Reel |
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