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ISL6527CB Datasheet

  • ISL6527CB

  • Single Synchronous Buck Pulse-Width Modulation (PWM) Control...

  • 424.00KB

  • 15頁

  • INTERSIL   INTERSIL

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ISL6527
Data Sheet
April 8, 2005
FN9056.7
Single Synchronous Buck Pulse-Width
Modulation (PWM) Controller
The ISL6527 makes simple work out of implementing a
complete control and protection scheme for a DC-DC
stepdown converter. Designed to drive N-Channel
MOSFETs in a synchronous buck topology, the ISL6527
integrates the control, output adjustment, monitoring and
protection functions into a single package.
The ISL6527 provides simple, single feedback loop, voltage-
mode control with fast transient response. The output voltage
can be regulated to as low as the provided external reference.
A fixed frequency oscillator reduces design complexity, while
balancing typical application cost and efficiency.
The error amplifier features a 15MHz gain-bandwidth
product and 6V/碌s slew rate which enables high converter
bandwidth for fast transient performance. The resulting
PWM duty cycles range from 0% to 100%.
Protection from overcurrent conditions is provided by
monitoring the r
DS(ON)
of the upper MOSFET to inhibit PWM
operation appropriately. This approach simplifies the
implementation and improves efficiency by eliminating the
need for a current sense resistor.
Features
鈥?Operates from 3.3V to 5V input
鈥?Utilizes an external reference
鈥?Drives N-Channel MOSFETs
鈥?Simple single-loop control design
- Voltage-mode PWM control
鈥?Fast transient response
- High-bandwidth error amplifier
- Full 0% to 100% duty cycle
鈥?Lossless, programmable overcurrent protection
- Uses upper MOSFET鈥檚 r
DS(ON)
鈥?Converter can source and sink current
鈥?Small converter size
- Internal fixed frequency oscillator
- ISL6527: 300kHz
- ISL6527A: 600kHz
- Internal soft-start
- 14 Lead SOIC or 16 Lead, 5x5 QFN
鈥?QFN Package:
- Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat
No Leads - Package Outline
- Near Chip Scale Package footprint, which improves
PCB efficiency and has a thinner profile
鈥?Pb-Free Available (RoHS Compliant)
Applications
鈥?Power supplies for microprocessors
- PCs
- Embedded controllers
鈥?Subsystem power supplies
- PCI/AGP/GTL+ busses
- ACPI power control
- DDR SDRAM bus termination supply
鈥?Cable modems, set top boxes, and DSL modems
鈥?DSP and core communications processor supplies
鈥?Memory supplies
鈥?Personal computer peripherals
鈥?Industrial power supplies
鈥?3.3V-input DC-DC regulators
鈥?Low-voltage distributed power supplies
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2003-2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

ISL6527CB 產(chǎn)品屬性

  • 500

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 切換控制器

  • -

  • 電壓模式

  • 1

  • 325kHz

  • 100%

  • 2.97 V ~ 3.63 V

  • 是

  • 是

  • 無

  • 無

  • 無

  • 無

  • 無

  • 無

  • 0°C ~ 70°C

  • 14-SOIC（0.154"，3.90mm 寬）

  • 管件

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