Datasheet Linear Technology LTC1708-PG

Manufacturer	Linear Technology
Series	LTC1708-PG

Dual Adjustable 5-Bit VID High Efficiency, 2-Phase Current Mode Synchronous Buck DC/DC Regulator Controller

Datasheets

PDF, 343 Kb, File uploaded: Sep 20, 2017

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Prices

Packaging

	LTC1708EG-PG#PBF	LTC1708EG-PG#TRPBF
N	1	2
Package	SSOP-36 Package Outline Drawing	SSOP-36 Package Outline Drawing
Package Code	G	G
Package Index	05-08-1640 (G36)	05-08-1640 (G36)
Pin Count	36	36

Parametrics

Parameters / Models	LTC1708EG-PG#PBF	LTC1708EG-PG#TRPBF
Demo Boards	DC302A	DC302A
Export Control	no	no
Features	VID, Active Voltage Positioning, PolyPhase, Burst Mode	VID, Active Voltage Positioning, PolyPhase, Burst Mode
Frequency, kHz	300	300
Frequency Adjust Range	150kHz - 300kHz	150kHz - 300kHz
Integrated Inductor	no	no
Ishutdown, µA	20	20
Isupply, mA	0.85	0.85
Max Phases	2	2
Monolithic	no	no
Number of Outputs	2	2
Operating Temperature Range, °C	0 to 85	0 to 85
Output Current, A	25	25
Polyphase	yes	yes
Switch Current, A	25	25
Synchronous	yes	yes
Topology	Buck	Buck
Topology 1	Buck	Buck
Topology 2	Buck	Buck
Vin Max, V	36	36
Vin Min, V	4	4
Vout Max, V	2	2
Vout Min, V	0.9	0.9

Eco Plan

	LTC1708EG-PG#PBF	LTC1708EG-PG#TRPBF
RoHS	Compliant	Compliant

Design Notes

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

Articles

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Beware: Worst-Case Specifications Can Be a Reality &mdash LT Journal
PDF, 172 Kb, File published: Feb 1, 2000
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DESIGN FEATURES Beware: Worst-Case Specifications
Can Be a Reality
by Steve Hobrecht
Introduction
The design of portable electronic
devices always involves trade-offs
among cost, weight, size, speed, runtime, features and reliability. It is
necessary to design the power supply
for worst-case conditions because the
software, which may or may not have
been written yet, may, in some situations, exercise the hardware to its
fullest potential. If typical operating
conditions are used to define the power
supply design requirements, hardware reliability may depend upon the
particular software being used, either
in normal operation or when the software is вЂњacting up.вЂќ
In the case of a typical notebook
computer, the nominal 120mA I/O
current can rise to 2.5A for an indeterminate amount of time. The
software being executed is the determining factor. If a linear regulator is
5V
SYSTEM
SUPPLY …

Model Line

Series: LTC1708-PG (2)

LTC1708EG-PG#PBF LTC1708EG-PG#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Digitally Programmable Regulators

EMS supplier

Slices

Microcontrollers