Datasheet Linear Technology LTC1709 — 数据表

制造商	Linear Technology
系列	LTC1709

2相，5位可调，高效，同步降压型开关稳压器

数据表

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PDF, 308 Kb, 文件上传: Sep 20, 2017

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价格

打包

	LTC1709EG#PBF	LTC1709EG#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#PBF	LTC1709EG#TRPBF
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	3.5	3.5
Vout Min, V	1.3	1.3

生态计划

	LTC1709EG#PBF	LTC1709EG#TRPBF
RoHS	Compliant	Compliant

设计须知

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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 …
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PolyPhase Surface Mount Power Supply Meets AMD Athlon Processor Requirements with No Heat Sink &mdash DN216
PDF, 87 Kb, 档案已发布: Oct 3, 1999
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advertisement PolyPhase Surface Mount Power Supply Meets AMD Athlon
Processor Requirements with No Heat Sink вЂ“ Design Note 216
Craig Varga
Introduction
With the introduction of the AMD Athlon processor, the
supply current requirement for a desktop PCвЂ™s processor
has, for the п¬Ѓrst time, surpassed the 40A mark. This,
combined with low operating voltage (1.6V nominal)
and very tight transient-response requirements, pushes
conventional power supply design approaches to their
limits. The LTC В®1929 PolyPhaseВ® current mode controller makes a slight break with convention. Instead
of trying to deliver 40A with a single regulator, the
load is split in half by paralleling two regulators. The
magic, however, is in the phase relationship of the two
regulatorsвЂ™ clocks. PolyPhase Architecture
The two synchronous buck regulators are connected in
parallel and their clocks are synchronized 180В° out of
phase. This seemingly simple trick results in tremendous
performance advantages as well as cost savings. A
current mode architecture was chosen to reduce possible problems related to circulating currents that can
appear in paralleled voltage mode regulators. Competing
L, LT, LTC, LTM, Linear Technology, the Linear logo and PolyPhase are registered
trademarks of Linear Technology Corporation. All other trademarks are the property …

模型线

系列: LTC1709 (2)

LTC1709EG#PBF LTC1709EG#TRPBF

制造商分类

Power Management > Switching Regulator > Digitally Programmable Regulators