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ISL6522BCB Datasheet

  • ISL6522BCB

  • Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) C...

  • 472.00KB

  • 15页

  • INTERSIL

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庐
ISL6522B
Data Sheet
April 4, 2005
FN9150.1
Buck and Synchronous Rectifier
Pulse-Width Modulator (PWM) Controller
The ISL6522B provides complete control and protection for a
DC-DC converter optimized for high-performance
microprocessor applications. It is designed to drive two
N-Channel MOSFETs in a synchronous rectified buck topology.
The ISL6522B integrates all of the control, output adjustment,
monitoring and protection functions into a single package.
The output voltage of the converter can be precisely
regulated to as low as 0.8V, with a maximum tolerance of
卤1%
over temperature and line voltage variations.
The ISL6522B provides simple, single feedback loop, voltage-
mode control with fast transient response. It includes a 200kHz
free-running triangle-wave oscillator that is adjustable from
below 50kHz to over 1MHz. The error amplifier features a
15MHz gain-bandwidth product and 6V/碌s slew rate which
enables high converter bandwidth for fast transient perform-
ance. The resulting PWM duty ratio ranges from 0-100%.
The ISL6522B protects against overcurrent conditions by
inhibiting PWM operation. The ISL6522B monitors the
current by using the r
DS(ON)
of the upper MOSFET which
eliminates the need for a current sensing resistor.
Features
鈥?Drives two N-Channel MOSFETs
鈥?Operates from +5V or +12V input
鈥?Simple single-loop control design
- Voltage-mode PWM control
鈥?Fast transient response
- High-bandwidth error amplifier
- Full 0鈥?00% duty ratio
鈥?Excellent output voltage regulation
- 0.8V internal reference
-
卤1%
over line voltage and temperature
鈥?Overcurrent fault monitor
- Does not require extra current sensing element
- Uses MOSFETs r
DS(ON)
鈥?Converter can source and sink current
鈥?Pre-Biased Load Start Up
鈥?Small converter size
- Constant frequency operation
- 200kHz free-running oscillator programmable from
50kHz to over 1MHz
鈥?14-lead SOIC package and 16-lead 5x5mm QFN Package
鈥?QFN Package
- Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat
No Leads-Product Outline
- Near Chip-Scale Package Footprint; Improves PCB
Efficiency and Thinner in Profile
鈥?Pb-Free Available (RoHS Compliant)
Pinouts
RT
OCSET
SS
COMP
FB
EN
GND
ISL6522B (SOIC)
TOP VIEW
1
2
3
4
5
6
7
14 VCC
13 PVCC
12 LGATE
11 PGND
10 BOOT
9
8
UGATE
PHASE
Applications
鈥?Power supply for Pentium
庐
, Pentium Pro, PowerPC
庐
and
AlphaPC鈩?microprocessors
鈥?FPGA Core DC/DC Converters
鈥?Low-voltage distributed power supplies
ISL6522B (QFN)
TOP VIEW
OCSET
VCC
13
12 PVCC
11 LGATE
10 PGND
9
5
NC
6
GND
7
PAHSE
8
UGATE
BOOT
NC
16
SS 1
COMP 2
FB 3
EN 4
15
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2004, 2005. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.
PowerPC
庐
is a trademark of IBM. AlphaPC鈩?is a trademark of Digital Equipment Corporation. Pentium
庐
is a registered trademark of Intel Corporation.
1
RT
14

ISL6522BCB PDF文件相关型号

ISL6522CR,ISL6522CV,ISL6523

ISL6522BCB 产品属性

  • 50

  • 集成电路 (IC)

  • PMIC - 稳压器 - DC DC 切换控制器

  • -

  • 电压模式

  • 1

  • 1MHz

  • 100%

  • 10.8 V ~ 13.2 V

  • 是

  • 是

  • 无

  • 无

  • 无

  • 无

  • 无

  • 无

  • 0°C ~ 70°C

  • 14-SOIC（0.154"，3.90mm 宽）

  • 管件

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