Datasheet Linear Technology LTC3788-1 — Datenblatt

Hersteller	Linear Technology
Serie	LTC3788-1

2-Phasen-Synchron-Boost-Controller mit zwei Ausgängen

Datenblätter

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PDF, 391 Kb, Revision: C, Datei hochgeladen: Sep 23, 2017

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Preise

Verpackung

	LTC3788EGN-1#PBF	LTC3788EGN-1#TRPBF	LTC3788IGN-1#PBF	LTC3788IGN-1#TRPBF
N	1	2	3	4
Package	SSOP-28 Paketumrisszeichnung	SSOP-28 Paketumrisszeichnung	SSOP-28 Paketumrisszeichnung	SSOP-28 Paketumrisszeichnung
Package Code	GN	GN	GN	GN
Package Index	05-08-1641 (GN28)	05-08-1641 (GN28)	05-08-1641 (GN28)	05-08-1641 (GN28)
Pin Count	28	28	28	28

Parameter

Parameters / Models	LTC3788EGN-1#PBF	LTC3788EGN-1#TRPBF	LTC3788IGN-1#PBF	LTC3788IGN-1#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Design Tools	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model
Export Control	no	no	no	no
Features	PolyPhase, Burst Mode, DCR Current Sense, Resistor Set Frequency, External Synchronization, Power Good	PolyPhase, Burst Mode, DCR Current Sense, Resistor Set Frequency, External Synchronization, Power Good	PolyPhase, Burst Mode, DCR Current Sense, Resistor Set Frequency, External Synchronization, Power Good	PolyPhase, Burst Mode, DCR Current Sense, Resistor Set Frequency, External Synchronization, Power Good
Frequency, kHz	900	900	900	900
Frequency Adjust Range	50kHz - 900kHz	50kHz - 900kHz	50kHz - 900kHz	50kHz - 900kHz
Frequency Sync Range	75kHz - 850kHz	75kHz - 850kHz	75kHz - 850kHz	75kHz - 850kHz
Integrated Inductor	no	no	no	no
Ishutdown, µA	8	8	8	8
Isupply, mA	0.125	0.125	0.125	0.125
Max Phases	2	2	2	2
Monolithic	no	no	no	no
Number of Outputs	2	2	2	2
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 85	-40 to 85
Polyphase	yes	yes	yes	yes
Sense Resistor	Rsense, DCR	Rsense, DCR	Rsense, DCR	Rsense, DCR
Switch Current, A	25	25	25	25
Switch Current 2, A	25	25	25	25
Synchronous	yes	yes	yes	yes
Topology	Boost	Boost	Boost	Boost
Topology 1	Boost	Boost	Boost	Boost
Topology 2	Boost, Inverting	Boost, Inverting	Boost, Inverting	Boost, Inverting
Vin Max, V	38	38	38	38
Vin Min, V	2.5	2.5	2.5	2.5
Vin Min Startup, V	4.5	4.5	4.5	4.5
Vout Max, V	60	60	60	60
Vout Max 2, V	15	15	15	15
Vout Maximum	60V	60V	60V	60V
Vout Min, V	1.2	1.2	1.2	1.2
Vswitch Max, V	60	60	60	60

Öko-Plan

	LTC3788EGN-1#PBF	LTC3788EGN-1#TRPBF	LTC3788IGN-1#PBF	LTC3788IGN-1#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Artikel

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Boost 12V to 140V with a Single Converter IC &mdash LT Journal
PDF, 152 Kb, Datei veröffentlicht: Nov 2, 2015
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Boost 12V to 140V with a Single Converter IC
Victor Khasiev Generating a high voltage from a much lower voltage
presents a number of challenges for the classical single
stage boost topology. For instance, the maximum
duty cycle limitation of a boost controller may not
allow the required step-up ratio. Even if it does, there
is often a sharp decrease in efficiency at high duty
cycles. The duty cycle can be shortened by choosing
discontinuous mode of operation, but this leads to high
peak input current, higher losses and EMI challenges.
An alternative to a single boost converter
is a 2-stage boost converter, where the
first stage produces anВ intermediate
voltage and the second stage boosts
to the final high voltage. A 2-stage
converter can be produced with a single
controller IC, such as the LTC3788, a high performance 2-phase dual output
synchronous boost controller, which
drives all NвЂ‘channel power MOSFETs.
The LTC3788 can be configured such that
the first boost stage takes advantage of its
synchronous rectification feature, which
maximizes efficiency, reduces power losses FigureВ 1. Block diagram of LTC3788-based 2-stage boost converter CINT 40V ABS MAX TG1 SW1 PGOOD1 ILIM SS1 ITH1 FB1 SENSE1+ Q1 …

Modellreihe

Serie: LTC3788-1 (4)

LTC3788EGN-1#PBF LTC3788EGN-1#TRPBF LTC3788IGN-1#PBF LTC3788IGN-1#TRPBF

Herstellerklassifikation

Power Management > Switching Regulator > Step-Up (Boost) Regulators > Multiple Output Boost | External Power Switch Boost