Datasheet Linear Technology LT8611 — Datenblatt

Hersteller	Linear Technology
Serie	LT8611

42V, 2,5A Synchron-Abwärtsregler mit Stromerfassung und 2,5µA Ruhestrom

Datenblätter

Vorschau und Herunterladen

PDF, 343 Kb, Sprache: en, Datei hochgeladen: Sep 19, 2017, Seiten: 26
42V, 2.5A Synchronous Step-Down Regulator with Current Sense and 2.5μA Quiescent Current

Auszug aus dem Dokument

Preise

Verpackung

	LT8611EUDD#PBF	LT8611EUDD#TRPBF	LT8611IUDD#PBF	LT8611IUDD#TRPBF
N	1	2	3	4
Package	3x5 QFN-24 Paketumrisszeichnung	3x5 QFN-24 Paketumrisszeichnung	3x5 QFN-24 Paketumrisszeichnung	3x5 QFN-24 Paketumrisszeichnung
Package Code	UDD	UDD	UDD	UDD
Package Index	05-08-1833	05-08-1833	05-08-1833	05-08-1833
Pin Count	24	24	24	24

Parameter

Parameters / Models	LT8611EUDD#PBF	LT8611EUDD#TRPBF	LT8611IUDD#PBF	LT8611IUDD#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC1750A	DC1750A	DC1750A	DC1750A
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	Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Rail-to-Rail Current Sense Amplifier, Output Current Monitor	Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Rail-to-Rail Current Sense Amplifier, Output Current Monitor	Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Rail-to-Rail Current Sense Amplifier, Output Current Monitor	Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Rail-to-Rail Current Sense Amplifier, Output Current Monitor
Frequency, kHz	2200	2200	2200	2200
Ishutdown, µA	1	1	1	1
Isupply, mA	0.0024	0.0024	0.0024	0.0024
Monolithic	yes	yes	yes	yes
Number of Outputs	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 85	-40 to 85
Output Current, A	2.5	2.5	2.5	2.5
Switch Current, A	4.8	4.8	4.8	4.8
Synchronous	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck
Vin Max, V	42	42	42	42
Vin Min, V	3.4	3.4	3.4	3.4
Vout Max, V	40	40	40	40

Öko-Plan

	LT8611EUDD#PBF	LT8611EUDD#TRPBF	LT8611IUDD#PBF	LT8611IUDD#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Konstruktionshinweise

Herunterladen
42V, 2.5A Synchronous Step-Down Regulator with 2.5ОјA Quiescent Current &mdash DN504
PDF, 97 Kb, Datei veröffentlicht: May 30, 2012
Auszug aus dem Dokument
42V, 2.5A Synchronous Step-Down Regulator with 2.5ВµA
Quiescent Current
Design Note 504
Hua (Walker) Bai
Introduction
The LTВ®8610 and LT8611 are 42V, 2.5A synchronous
step-down regulators that meet the stringent high
input voltage and low output voltage requirements of
automotive, industrial and communications applications. To minimize external components and solution
size, the top and bottom power switches are integrated
in a synchronous regulator topology, including internal
compensation. The regulator consumes only 2.5ОјA
quiescent current from the input source even while
regulating the output.
High Efп¬Ѓciency Synchonous Operation
Replacing an external Schottky diode with an internal
synchronous power switch not only minimizes the solution size, but also increases efп¬Ѓciency and reduces power
dissipation. The efп¬Ѓciency improvement is signiп¬Ѓcant
in low output voltage applications where the voltage
drop of the Schottky diode represents a relatively large
portion of the output voltage. Figure 1 shows a 12V
to 3.3V circuit. Figure 2 shows the efп¬Ѓciency of this
circuit reaching 94%, which is 5% to 10% higher than …

Modellreihe

Serie: LT8611 (4)

LT8611EUDD#PBF LT8611EUDD#TRPBF LT8611IUDD#PBF LT8611IUDD#TRPBF

Herstellerklassifikation

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | Internal Power Switch Buck | High Input Voltage Buck
Power Management > LED Driver ICs > Step-Down (Buck) LED Drivers