Datasheet Linear Technology LTC1682IS8-5#PBF — Ficha de datos

Fabricante	Linear Technology
Serie	LTC1682
Numero de parte	LTC1682IS8-5#PBF

Bombas de carga doble con regulador lineal de bajo ruido

Hojas de datos

PDF, 201 Kb, Revisión: S, Archivo subido: sept 27, 2017

Extracto del documento

Precios

Embalaje

Package	SO-8
Package Code	S8
Package Index	05-08-1610 (S8)

Paramétricos

Demo Boards	DC249A-A,DC249A-B,DC249A-C,DC332A
Design Tools	LTspice Model
Export Control	no
Frequency	550 kHz
Function	Regulated Step-Up Charge Pump
Ishutdown	1 µA
Isupply	0.15 mA
Number of Outputs	1
Operating Temperature Range	-40 to 85 °C
Output Current	0.05 A
Output Voltage	3.3V, 5V, Adj
Vin Max	4.4 V
Vin Min	1.8 V

Plan ecológico

RoHS

Obediente

Notas de Diseño

Descargar
Tiny Regulators Drive White LED Backlights &mdash DN231
PDF, 76 Kb, Archivo publicado: mayo 1, 2001
Extracto del documento
Tiny Regulators Drive White LED Backlights вЂ“ Design Note 231
Dave Kim
Introduction
The emergence of color LCD displays in handheld
information appliances has created the need for a
small, bright white backlight. Fortunately, the recent
commercialization of high intensity white LEDs provides
the perfect solution. These tiny LEDs are capable of
delivering ample white light without the fragility problems and costs associated with п¬‚uorescent backlights
commonly used in notebook computers. However, they
do pose a problemвЂ”the forward voltage of white LEDs
can be as high as 4V, precluding powering them directly
from a single lithium-ion cell.
This Design Note describes several different circuits that
may be used to boost and regulate the Li-Ion battery
voltage to power white LEDs. These circuits provide
sufп¬Ѓcient power to drive multiple white LEDs and are
small enough to easily п¬Ѓt within cellular telephones and
handheld computers. VIN
3V TO
4.2V LTC1754-5
C3
10ОјF …

Artículos

Descargar
Low Noise Boost VCO Power Supply for Portable Applications &mdash LT Journal
PDF, 167 Kb, Archivo publicado: sept 1, 1999
Extracto del documento
DESIGN IDEAS Low Noise Boost VCO Power Supply
for Portable Applications
by Ted Henderson
Introduction
Many portable RF products use voltage controlled oscillators (VCOs) to
generate the RF carrier frequency.
These applications often require low
noise VCO power supply voltages that
are greater than the primary battery
supply. A DC/DC converter powering
a low noise linear regulator is often
used. Unfortunately, there are several disadvantages to this solution.
The DC/DC converter tends to produce noise that may not be rejected
by the regulator, resulting in regulator output noise far greater than the
thermal noise levels. The linear regulator may require a large output compensation capacitor with specific
ESR requirements. The board area
for both devices and support components can be large. The LTC1682
charge pump DC/DC voltage converter has been designed to minimize
these issues. The charge pump and
linear regulator have been mutually
optimized for minimum regulator output noise. The linear regulator was
designed to operate with several different types of output capacitors
including small, low value, low ESR …

Linea modelo

Serie: LTC1682 (24)

LTC1682CMS8#PBF LTC1682CMS8#TRPBF LTC1682CMS8-3.3#PBF LTC1682CMS8-3.3#TRPBF LTC1682CMS8-5#PBF LTC1682CMS8-5#TRPBF LTC1682CS8#PBF LTC1682CS8#TRPBF LTC1682CS8-3.3#PBF LTC1682CS8-3.3#TRPBF LTC1682CS8-5#PBF LTC1682CS8-5#TRPBF LTC1682IMS8#PBF LTC1682IMS8#TRPBF LTC1682IMS8-3.3#PBF LTC1682IMS8-3.3#TRPBF LTC1682IMS8-5#PBF LTC1682IMS8-5#TRPBF LTC1682IS8#PBF LTC1682IS8#TRPBF LTC1682IS8-3.3#PBF LTC1682IS8-3.3#TRPBF LTC1682IS8-5#PBF LTC1682IS8-5#TRPBF

Clasificación del fabricante

Power Management > Inductorless (Charge Pump) DC/DC Converters > Regulated Step-Up Charge Pumps

Otros nombres:

LTC1682IS8-5PBF, LTC1682IS8-5 PBF, LTC1682IS85#PBF, LTC1682IS8 5#PBF

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