Datasheet Linear Technology LTC3727

Manufacturer	Linear Technology
Series	LTC3727

High Efficiency, 2-Phase Synchronous Step-Down Switching Regulators

Datasheets

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PDF, 381 Kb, Language: en, File uploaded: Sep 22, 2017, Pages: 32
High Efficiency, 2-Phase Synchronous Step-Down Switching Regulators

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Packaging

	LTC3727EG#PBF	LTC3727EG#TRPBF
N	1	2
Package	SSOP-28 Package Outline Drawing	SSOP-28 Package Outline Drawing
Package Code	G	G
Package Index	05-08-1640 (G28)	05-08-1640 (G28)
Pin Count	28	28

Parametrics

Parameters / Models	LTC3727EG#PBF	LTC3727EG#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode
Design Tools	LTspice Model	LTspice Model
Export Control	no	no
Features	PolyPhase, Power Good, PLL, External Synchronization, Burst Mode	PolyPhase, Power Good, PLL, External Synchronization, Burst Mode
Frequency, kHz	550	550
Frequency Sync Range	250kHz to 550kHz	250kHz to 550kHz
Integrated Inductor	no	no
Ishutdown, µA	20	20
Isupply, mA	0.67	0.67
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
Output Current 2, A	25	25
Polyphase	yes	yes
Sense Resistor	Rsense	Rsense
Switch Current, A	25	25
Switch Current 2, 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	14	14
Vout Maximum	14V	14V
Vout Min, V	0.8	0.8
Vout Min 2, V	.8	.8
Vref Accuracy Over Temp, %	1	1

Eco Plan

	LTC3727EG#PBF	LTC3727EG#TRPBF
RoHS	Compliant	Compliant

Other Options

LTC3727-1 LTC3727-1

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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PolyPhase Switching Now Available for High Output Voltage Telecom, Automotive and Industrial Power Supplies &mdash LT Journal
PDF, 142 Kb, File published: Dec 1, 2002
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DESIGN IDEAS PolyPhase Switching Now Available
for High Output Voltage Telecom,
Automotive and Industrial
Power Supplies
by Eric Gu
Introduction 1
0.1ВµF
180pF
20k
1% 2
105k
1% 1000pF 3
4
5 7
8
1000pF 9 33pF SENSE1 + TG1 SENSE1 вЂ“ SW1 VOSENSE1 BOOST1 PLLFLTR VIN
BG1 PLLIN EXTVCC FCB
LTC3727
ITH1
SGND INTVCC
PGND L1
15ВµH PGOOD 27 10
11 1000pF 12 20k …

Model Line

Series: LTC3727 (2)

LTC3727EG#PBF LTC3727EG#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | External Power Switch Buck Controllers

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