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參數(shù)資料
| 型號： | ISL6545IRZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 5V or 12V Single Synchronous Buck Pulse-Width Modulation (PWM) Controller |
| 中文描述： | SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, ROHS COMPLIANT, PLASTIC, MO-229WEED-3, DFN-10 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 302K |
| 代理商： | ISL6545IRZ |
www.DataSheet4U.com
1
FN6305.3
ISL6545, ISL6545A
5V or 12V Single Synchronous Buck
Pulse-Width Modulation (PWM) Controller
The ISL6545 makes simple work out of implementing a
complete control and protection scheme for a DC/DC stepdown
converter driving N-channel MOSFETs in a synchronous buck
topology. Since it can work with either 5V or 12V supplies, this
one IC can be used in a wide variety of applications within a
system. The ISL6545 integrates the control, gate drivers, output
adjustment, monitoring and protection functions into a single 8
Ld SOIC or 10 Ld DFN package.
The ISL6545 provides single feedback loop, voltage-mode
control with fast transient response. The output voltage can be
precisely regulated to as low as 0.6V, with a maximum
tolerance of ±1.0% over temperature and line voltage
variations. A selectable fixed frequency oscillator (ISL6545 for
300kHz; ISL6545A for 600kHz) reduces design complexity,
while balancing typical application cost and efficiency.
The error amplifier features a 20MHz gain-bandwidth
product and 9V/
μ
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 lower MOSFET to inhibit PWM
operation appropriately. This approach simplifies the
implementation and improves efficiency by eliminating the
need for a current sense resistor.
Pinout
ISL6545 (SOIC)
TOP VIEW
ISL6545 (10 LD 3x3 DFN)
TOP VIEW
Features
Operates from +5V or +12V Supply Voltage (for bias)
- 1.0V to 12V V
IN
Input Range (up to 20V possible with
restrictions; see Input Voltage Considerations)
- 0.6V to V
IN
Output Range
- Integrated Gate Drivers use V
CC
(5V to 12V)
- 0.6V Internal Reference; ±1.0% tolerance
Simple Single-Loop Control Design
- Voltage-Mode PWM Control
- Drives N-Channel MOSFETs
Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Cycle
Lossless, Programmable Overcurrent Protection
- Uses Lower MOSFET’s r
DS(ON)
Small Converter Size in 8 Ld SOIC or 10 Ld DFN
- 300kHz or 600kHz Fixed Frequency Oscillator
- Fixed Internal Soft-Start, Capable into a Pre-biased
Load
- Integrated Boot Diode
- Enable/Shutdown Function on COMP/SD Pin
- Output Current Sourcing and Sinking
Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
Power Supplies for Microprocessors or Peripherals
- PCs, Embedded Controllers, Memory Supplies
- DSP and Core Communications Processor Supplies
Subsystem Power Supplies
- PCI, AGP; Graphics Cards; Digital TV
- SSTL-2 and DDR/DDR2/DDR3 SDRAM Bus
Termination Supply
Cable Modems, Set Top Boxes, and DSL Modems
Industrial Power Supplies; General Purpose Supplies
5V or 12V-Input DC/DC Regulators
Low-Voltage Distributed Power Supplies
5
6
8
7
4
3
2
1
UGATE
GND
PHASE
FB
VCC
COMP/SD
BOOT
LGATE/OCSET
1
BOOT
UGATE
N/C
GND
PHASE
COMP/SD
FB
N/C
VCC
2
3
4
5
LGATE/OCSET
10
9
8
7
6
GND
Data Sheet
November 15, 2006
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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