参数资料
| 型号： | ISL6420BIRZ |
| 厂商： | Intersil |
| 文件页数： | 1/21页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 20-QFN |
| 标准包装： | 75 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1.4MHz |
| 占空比： | 100% |
| 电源电压： | 4.5 V ~ 28 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 包装： | 管件 |
Advanced Single Synchronous Buck Pulse-Width
Modulation (PWM) Controller
ISL6420B
The ISL6420B simplifies the implementation of a
complete control and protection scheme for a
high-performance DC/DC buck converter. It is designed
to drive N-Channel MOSFETs in a synchronous rectified
buck topology. The ISL6420B integrates control, output
adjustment, monitoring and protection functions into a
single package. Additionally, the IC features an external
reference voltage tracking mode for externally
referenced buck converter applications and DDR
termination supplies, as well as a voltage margining
mode for system testing in networking DC/DC converter
applications.
The ISL6420B provides simple, single feedback loop,
voltage mode control with fast transient response. The
output voltage of the converter can be precisely
regulated to as low as 0.6V.
The operating frequency is fully adjustable from 100kHz
to 1.4MHz. High frequency operation offers cost and
space savings.
The error amplifier features a 15MHz gain-bandwidth
product and 6V/μs slew rate that enables high converter
bandwidth for fast transient response. The PWM duty
cycle ranges from 0% to 100% in transient conditions.
Selecting the capacitor value from the ENSS pin to
ground sets a fully adjustable PWM soft-start. Pulling the
ENSS pin LOW disables the controller.
The ISL6420B monitors the output voltage and
generates a PGOOD (power good) signal when soft-start
sequence is complete and the output is within regulation.
A built-in overvoltage protection circuit prevents the
output voltage from going above typically 115% of the
set point. Protection from overcurrent conditions is
provided by monitoring the r DS(ON) of the upper MOSFET
to inhibit the PWM operation appropriately. This approach
simplifies the implementation and improves efficiency by
eliminating the need for a current sensing resistor.
Features
? Operates From:
- 4.5V to 5.5V Input
- 5.5V to 28V Input
? 0.6V Internal Reference Voltage
- ±2.0% Reference Accuracy
? Resistor-Selectable Switching Frequency
- 100kHz to 1.4MHz
? Voltage Margining and External Reference Tracking
Modes
? Output can Sink or Source Current
? Lossless, Programmable Overcurrent Protection
- Uses Upper MOSFET’s r DS(ON)
? Programmable Soft-Start
? Drives N-Channel MOSFETs
? Simple Single-Loop Control Design
- Voltage-Mode PWM Control
? Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Cycle
? Extensive Circuit Protection Functions
- PGOOD, Overvoltage, Overcurrent, Shutdown
? Diode Emulation during Startup for Pre-Biased Load
Applications
? Offered in 20 Ld QFN and QSOP Packages
? QFN (4x4) Package
- QFN compliant to JEDEC PUB95 MO-220
QFN -Quad Flat No Leads - Product Outline
- QFN Near Chip Scale Package Footprint; Improves
PCB Efficiency, Thinner in Profile
? Pb-Free (RoHS Compliant)
Applications
? Power Supplies for Microprocessors/ASICs
- Embedded Controllers
- DSP and Core Processors
- DDR SDRAM Bus Termination
? Ethernet Routers and Switchers
? High-Power DC/DC Regulators
? Distributed DC/DC Power Architecture
? Personal Computer Peripherals
? Externally Referenced Buck Converters
December 4, 2009
FN6901.1
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. 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6420BIRZ-T7A | 制造商:Intersil Corporation 功能描述:53068P02 MASK ONLY, SYNC BUCK PWM CONT. WITH 4.5V-28V INPUT, - Tape and Reel 制造商:Intersil Corporation 功能描述:IC REG CTRLR BUCK PWM VM 20QFN 制造商:Intersil Corporation 功能描述:ISL6420 Series 4.5 - 28 V 20 A Synchronous Buck PWM Controller - QFN-20 制造商:Intersil Corporation 功能描述:Advanced Single Sync Buck PWM Controller 制造商:Intersil Corporation 功能描述:Advanced Single Syn Buck PWM Controller |
| ISL6420BIRZ-TK | 功能描述:IC REG CTRLR BUCK PWM VM 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL6420BMAEP | 制造商:Intersil Corporation 功能描述:VOLT MODE PWM CNTRLR 20QSOP W - Rail/Tube |
| ISL6420BMAEP-TK | 制造商:Intersil Corporation 功能描述:VOLT MODE PWM CNTRLR 20QSOP W - Tape and Reel |
| ISL6420EVAL3 | 功能描述:EVALUATION BOARD 3 ISL6420 RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
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