Datasheet Linear Technology LT3487EDD#TRPBF — Ficha de datos

Fabricante	Linear Technology
Serie	LT3487
Numero de parte	LT3487EDD#TRPBF

Regulador de conmutación de refuerzo e inversión para polarización CCD

Hojas de datos

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PDF, 296 Kb, Idioma: en, Archivo subido: sept 18, 2017, Páginas: 16
Boost and Inverting Switching Regulator for CCD Bias

Extracto del documento

Embalaje

Package	3x3 DFN-10
Package Code	DD
Package Index	05-08-1699

Paramétricos

Architecture	Constant Frequency Current Mode
Demo Boards	DC912A
Design Tools	LTspice File
Export Control	no
Features	Output Disconnect, Sequencing, Integrated Schottky Diode
Frequency	2000 kHz
Integrated Inductor	no
Ishutdown	5.3 µA
Isupply	3.7 mA
Monolithic	yes
Number of Outputs	2
Operating Temperature Range	0 to 85 °C
Polyphase	no
Switch Current	1.09 A
Switch Current 2	0.92 A
Synchronous	no
Topology	Boost, Inverting
Topology 1	Boost
Topology 2	Inverting
Vin Max	16 V
Vin Min	2.3 V
Vin Min Startup	2.3 V
Vout Max	28 V
Vout Max 2	34 V
Vout Min	1.23 V
Vswitch Max	32 V

Plan ecológico

RoHS

Obediente

Artículos

Descargar
CCD Bias Supply Integrates 'њOutput Disconnect,'ќ Schottkys and Feedback Resistors &mdash LT Journal
PDF, 257 Kb, Archivo publicado: nov 22, 2006
Extracto del documento
DESIGN FEATURESвЂ‰L CCD Bias Supply Integrates
вЂњOutput Disconnect,вЂќ Schottkys
by Jesus Rosales
and Feedback Resistors
Introduction CCD Draws High Power
from Discharged Li-Ion FigureВ 1 shows the LT3487 in a high
power CCD application that provides
45mA at 15V and 90mA at вЂ“8V from
a nearly discharged Li-Ion battery at
3.0V. This power handling allows the
LT3487 to be used in digital cameras
with video capability.
This particular converter operates
over a wide input voltage range between 2.3V and 16V. Both channels
run at a 2MHz switching frequency,
enabling the use of tiny inductors and
capacitors. The fixed frequency PWM
control provides outputs with low,
predictable ripple.
External components are minimized as both channels incorporate
on-chip Schottky diodes. Each channel
also requires only one external resistor
to set the output voltage. The second …
Descargar
J-FET-Based DC/DC Converter Starts and Runs from 300mV Supply &mdash LT Journal
PDF, 475 Kb, Archivo publicado: nov 22, 2006
Extracto del documento
LвЂ‰DESIGN IDEAS J-FET-Based DC/DC Converter Starts
and Runs from 300mV Supply by Jim Williams
A J-FETвЂ™s self-biasing characteristic
can be utilized to construct a DC/DC
converter powered from as little as
300mV. Solar cells, thermopiles and
single stage fuel cells, all with outputs below 600mV, are typical power
sources for such a converter.
Figure 1, an N-channel J-FET I-V
plot, shows drain-source conduction
under zero bias (gate and source tied
together) conditions. This property can
be exploited to produce a self-starting
DC/DC converter that runs from 0.3V
to 1.6V inputs.
Figure 2 shows the circuit. Q1 and
T1 form an oscillator with T1вЂ™s secondary providing regenerative feedback
to Q1вЂ™s gate. When power is applied,
Q1вЂ™s gate is at zero volts and its drain
conducts current via T1вЂ™s primary. T1вЂ™s
phase inverting secondary responds by
going negative at Q1вЂ™s gate, turning
it off. T1вЂ™s primary current ceases, …

Linea modelo

Serie: LT3487 (2)

LT3487EDD#PBF LT3487EDD#TRPBF

Clasificación del fabricante

Power Management > Switching Regulator > Inverting Regulators | LCD/CCD/OLED Bias
Power Management > Switching Regulator > Step-Up (Boost) Regulators > Internal Power Switch Boost

Otros nombres:

LT3487EDDTRPBF, LT3487EDD TRPBF