Datasheet Linear Technology LT1375HV — Datenblatt

Hersteller	Linear Technology
Serie	LT1375HV

1,5 A, 500 kHz Abwärtsschaltregler

Datenblätter

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PDF, 518 Kb, Sprache: en, Datei hochgeladen: Sep 3, 2017, Seiten: 28
1.5A, 500kHz Step-Down Switching Regulators

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Preise

Verpackung

	LT1375HVCS8#PBF	LT1375HVCS8#TRPBF	LT1375HVIS8#PBF	LT1375HVIS8#TRPBF
N	1	2	3	4
Package	SO-8 Paketumrisszeichnung	SO-8 Paketumrisszeichnung	SO-8 Paketumrisszeichnung	SO-8 Paketumrisszeichnung
Package Code	S8	S8	S8	S8
Package Index	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)	05-08-1610 (S8)
Pin Count	8	8	8	8

Parameter

Parameters / Models	LT1375HVCS8#PBF	LT1375HVCS8#TRPBF	LT1375HVIS8#PBF	LT1375HVIS8#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC084B-A,DC084B-B	DC084B-A,DC084B-B	DC084B-A,DC084B-B	DC084B-A,DC084B-B
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File
Export Control	no	no	no	no
Features	External Synchronization	External Synchronization	External Synchronization	External Synchronization
Frequency, kHz	500	500	500	500
Frequency Sync Range	580kHz - 900kHz	580kHz - 900kHz	580kHz - 900kHz	580kHz - 900kHz
Integrated Inductor	no	no	no	no
Ishutdown, µA	20	20	20	20
Isupply, mA	2.5	2.5	2.5	2.5
Max Phases	1	1	1	1
Monolithic	yes	yes	yes	yes
Number of Outputs	1	1	1	1
Operating Temperature Range, °C	0 to 70	0 to 70	-40 to 85	-40 to 85
Output Current, A	1.2	1.2	1.2	1.2
Polyphase	no	no	no	no
Switch Current, A	2	2	2	2
Synchronous	no	no	no	no
Topology	Buck	Buck	Buck	Buck
Vin Max, V	30	30	30	30
Vin Min, V	5	5	5	5
Vout Max, V	25.8	25.8	25.8	25.8
Vout Maximum	.86VIN	.86VIN	.86VIN	.86VIN
Vout Min, V	2.42	2.42	2.42	2.42
Vref Accuracy Over Temp, %	2.5	2.5	2.5	2.5
Vswitch Max, V	40	40	40	40

Öko-Plan

	LT1375HVCS8#PBF	LT1375HVCS8#TRPBF	LT1375HVIS8#PBF	LT1375HVIS8#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Andere Optionen

LT1375 LT1375 LT1376 LT1376 LT1376HV

Anwendungshinweise

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Ultracompact LCD Backlight Inverters &mdash AN81
PDF, 365 Kb, Datei veröffentlicht: Sep 1, 1999
It has become desirable to fashion laptop computers with large area screens, leaving little room for the display's backlight inverter electronics. Miniaturization limitations of high voltage magnetic transformers impose limits on achievable space reduction. Another voltage step-up technology, piezoelectric transformers, permits the desired size reduction and provides additional benefits. This publication describes practical piezoceramic transformers and support circuitry. Ancillary benefits of the piezoelectric approach are also described. Appended sections detail transformer operation and feedback loop considerations.
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Application Note 81
September 1999
Ultracompact LCD Backlight Inverters
A Svelte Beast Cuts High Voltage Down to Size
Jim Williams, Linear Technology Corporation
Jim Phillips, Gary Vaughn, CTS Wireless Components
INTRODUCTION
The liquid crystal display (LCD) has become ubiquitous. It
is in use everywhere, from personal computers of all sizes
to point-of-sale terminals as well as instruments, autos
and medical apparatus. The LCD utilizes a cold cathode
fluorescent lamp (CCFL) as a light source to back light the
display. The CCFL requires a high voltage AC supply for
operation. Typically, over 1000 volts RMS is required to
initiate lamp operation, with sustaining voltages ranging
from 200VAC to 800VAC. To date, the high voltage section
of backlight вЂњinvertersвЂќ has been designed around magnetic transformers. A great deal of effort has been directed
towards these ends, accompanied by a large volume of
descriptive material.1 Unfortunately, as available circuit
board space continues to shrink, magnetic transformer
based approaches begin to encounter difficulty. In particular, it is highly desirable to fashion laptop computers
with large area screens, leaving little room for the backlight inverter board. In many cases there is so little space
available that building the inverter function inside the LCD …

Modellreihe

Serie: LT1375HV (4)

LT1375HVCS8#PBF LT1375HVCS8#TRPBF LT1375HVIS8#PBF LT1375HVIS8#TRPBF

Herstellerklassifikation

Power Management > Switching Regulator > SEPIC Regulators
Power Management > Switching Regulator > Step-Down (Buck) Regulators > Internal Power Switch Buck