Datasheet Linear Technology LTC1709EG-85#TRPBF — Datenblatt

Hersteller	Linear Technology
Serie	LTC1709-85
Artikelnummer	LTC1709EG-85#TRPBF

2-Phasen-, 5-Bit-VID, Strommodus, hocheffizienter, synchroner Abwärtsschaltregler

Datenblätter

PDF, 325 Kb, Datei hochgeladen: Sep 20, 2017

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Preise

Verpackung

Package	SSOP-36
Package Code	G
Package Index	05-08-1640 (G36)

Parameter

Demo Boards	DC292B-D
Design Tools	LTspice Model
Export Control	no
Features	VID, PolyPhase
Frequency	300 kHz
Integrated Inductor	no
Ishutdown	20 µA
Isupply	0.47 mA
Max Phases	2
Monolithic	no
Number of Outputs	1
Operating Temperature Range	0 to 85 °C
Output Current	40 A
Polyphase	yes
Switch Current	40 A
Synchronous	yes
Topology	Buck
Vin Max	36 V
Vin Min	4 V
Vout Max	1.825 V
Vout Min	1.05 V

Öko-Plan

RoHS

Compliant

Konstruktionshinweise

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Active Voltage Positioning Reduces Output Capacitors &mdash Design Solutions 10
PDF, 130 Kb, Datei veröffentlicht: 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 …

Artikel

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LTC1709-85 High Efficiency Converter with VRM 8.5 Compliant VID Control Minimizes Input and Output Capacitors &mdash LT Journal
PDF, 168 Kb, Datei veröffentlicht: Sep 1, 2001
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DESIGN IDEAS LTC1709-85 High Efficiency Converter
with VRM 8.5 Compliant VID Control
Minimizes Input and Output Capacitors
by Peter Guan
Introduction Design Example
high power-conversion efficiency for
low voltage, high current applications.
Because of the resulting output ripple
current cancellation, lower value
inductors can be used, resulting in a
faster load transient response. This,
plus the 5-bit VID table, makes this
device particularly attractive for CPU
power supply applications. The VID
table complies with the Intel VRM 8.5
specification. The LTC1709-85 is a 5-bit VID programmable, 2-phase, current mode,
step-down switching regulator controller that drives two synchronous
stages, composed of all N-channel
power MOSFETs, 180В° 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 Figure 1 shows the schematic diagram of a 30A power supply for the
Intel PentiumВ® III microprocessor; its …

Modellreihe

Serie: LTC1709-85 (2)

LTC1709EG-85#PBF LTC1709EG-85#TRPBF

Herstellerklassifikation

Power Management > Switching Regulator > Digitally Programmable Regulators

Andere Namen:

LTC1709EG-85TRPBF, LTC1709EG-85 TRPBF, LTC1709EG85#TRPBF, LTC1709EG 85#TRPBF

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