Datasheet Linear Technology LTC3819

Manufacturer	Linear Technology
Series	LTC3819

2-Phase, High Efficiency, Step-Down Controller for Sun Server CPUs

Datasheets

PDF, 397 Kb, File uploaded: Sep 23, 2017

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Prices

Packaging

	LTC3819EG#PBF	LTC3819EG#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	LTC3819EG#PBF	LTC3819EG#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode
Export Control	no	no
Features	VID, PolyPhase, Differential Remote Sense, Power Good, Burst Mode	VID, PolyPhase, Differential Remote Sense, Power Good, Burst Mode
Frequency, kHz	300	300
Frequency Adjust Range	150kHz - 300kHz	150kHz - 300kHz
Frequency Sync Range	150kHz - 300kHz	150kHz - 300kHz
Integrated Inductor	no	no
Ishutdown, µA	20	20
Isupply, mA	1.2	1.2
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	45	45
Polyphase	yes	yes
Sense Resistor	Rsense	Rsense
Switch Current, A	45	45
Synchronous	yes	yes
Topology	Buck	Buck
Vin Max, V	36	36
Vin Min, V	4	4
Vout Max, V	1.4125	1.4125
Vout Maximum	1.025V to 1.4125V	1.025V to 1.4125V
Vout Min, V	1.025	1.025

Eco Plan

	LTC3819EG#PBF	LTC3819EG#TRPBF
RoHS	Compliant	Compliant

Design Notes

Download
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 …

Model Line

Series: LTC3819 (2)

LTC3819EG#PBF LTC3819EG#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Digitally Programmable Regulators

EMS supplier

Slices

Microcontrollers