Datasheet Linear Technology LTC1709-9 — 数据表

制造商	Linear Technology
系列	LTC1709-9

2相，5位VID，电流模式，高效，同步降压型开关稳压器

数据表

PDF, 273 Kb, 文件上传: Sep 20, 2017

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价格

打包

	LTC1709EG-9#PBF	LTC1709EG-9#TRPBF
N	1	2
Package	SSOP-36 包装外形图	SSOP-36 包装外形图
Package Code	G	G
Package Index	05-08-1640 (G36)	05-08-1640 (G36)
Pin Count	36	36

参数化

Parameters / Models	LTC1709EG-9#PBF	LTC1709EG-9#TRPBF
Demo Boards	DC292B-C,DC311A	DC292B-C,DC311A
Design Tools	LTspice Model	LTspice Model
Export Control	no	no
Features	VID, PolyPhase	VID, PolyPhase
Frequency, kHz	300	300
Integrated Inductor	no	no
Ishutdown, µA	20	20
Isupply, mA	0.47	0.47
Max Phases	2	2
Monolithic	no	no
Number of Outputs	1	1
Operating Temperature Range, °C	0 to 85	0 to 85
Output Current, A	40	40
Polyphase	yes	yes
Switch Current, A	40	40
Synchronous	yes	yes
Topology	Buck	Buck
Vin Max, V	36	36
Vin Min, V	4	4
Vout Max, V	1.85	1.85
Vout Min, V	1.1	1.1

生态计划

	LTC1709EG-9#PBF	LTC1709EG-9#TRPBF
RoHS	Compliant	Compliant

其他选择

设计须知

下载
Active Voltage Positioning Reduces Output Capacitors &mdash Design Solutions 10
PDF, 130 Kb, 档案已发布: Nov 1, 1999
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Design Solutions 10
November 1999
Active Voltage Positioning Reduces Output Capacitors
by Robert Sheehan
INTRODUCTION
Power supply performance, especially transient response,
is key to meeting todayвЂ™s demands for low voltage, high
current microprocessor power. In an effort to minimize
the voltage deviation during a load step, a technique that
has recently been coined вЂњactive voltage positioningвЂќ is
generating substantial interest and gaining popularity in
the portable computer market. The benefits include lower
peak-to-peak output voltage deviation for a given load
step, without having to increase the output filter capacitance. Alternatively, the output filter capacitance can be
reduced while maintaining the same peak-to-peak transient response.
BASIC PRINCIPLE
The term вЂњactive voltage positioningвЂќ (AVP) refers to
setting the power supply output voltage at a point that is
dependent on the load current. At minimum load, the
output voltage is set to a slightly higher than nominal level.
At full load, the output voltage is set to a slightly lower than
nominal level. Effectively, the DC load regulation is
degraded, but the load transient voltage deviation will be …

文章

下载
LTC1709 Low Cost, High Efficiency 42A Converters with VID Control Reduce Input and Output Capacitors &mdash LT Journal
PDF, 190 Kb, 档案已发布: May 1, 2000
从文件中提取
DESIGN IDEAS LTC1709 Low Cost, High Efficiency 42A
Converters with VID Control Reduce
Input and Output Capacitors by Wei Chen
Introduction
used, resulting in a faster load transient response. This, plus the 5-bit
VID table, makes these devices particularly attractive for CPU power
supply applications. Two VID tables
are available to comply with the
VRM 8.4 (LTC1709-8) and VRM9.0
(LTC1709-9) specifications. The LTC1709-8/LTC1709-9 are dual,
current mode, PolyPhaseв„ў controllers that drive two synchronous buck
stages out of phase. This architecture
reduces the number of input and
output capacitors without increasing
the switching frequency. The relatively low switching frequency and
integrated high current MOSFET
drivers help provide high powerconversion efficiency for low voltage,
high current applications. Because of
the output ripple current cancellation, lower value inductors can be
C1
1000pF Design Example
Figure 1 shows the schematic diagram of a 42A power supply for the
AMD Athlon microprocessor. With …

模型线

系列: LTC1709-9 (2)

LTC1709EG-9#PBF LTC1709EG-9#TRPBF

制造商分类

Power Management > Switching Regulator > Digitally Programmable Regulators

相关刊物

数据表 Datasheet Linear Technology LTC1709

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