Datasheet Linear Technology LT3487 — 数据表

制造商	Linear Technology
系列	LT3487

CCD偏置的升压和反相开关稳压器

数据表

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PDF, 296 Kb, 语言: en, 文件上传: Sep 18, 2017, 页数: 16
Boost and Inverting Switching Regulator for CCD Bias

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打包

	LT3487EDD#PBF	LT3487EDD#TRPBF
N	1	2
Package	3x3 DFN-10 包装外形图	3x3 DFN-10 包装外形图
Package Code	DD	DD
Package Index	05-08-1699	05-08-1699
Pin Count	10	10

参数化

Parameters / Models	LT3487EDD#PBF	LT3487EDD#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC912A	DC912A
Design Tools	LTspice File	LTspice File
Export Control	no	no
Features	Output Disconnect, Sequencing, Integrated Schottky Diode	Output Disconnect, Sequencing, Integrated Schottky Diode
Frequency, kHz	2000	2000
Integrated Inductor	no	no
Ishutdown, µA	5.3	5.3
Isupply, mA	3.7	3.7
Monolithic	yes	yes
Number of Outputs	2	2
Operating Temperature Range, °C	0 to 85	0 to 85
Polyphase	no	no
Switch Current, A	1.09	1.09
Switch Current 2, A	0.92	0.92
Synchronous	no	no
Topology	Boost, Inverting	Boost, Inverting
Topology 1	Boost	Boost
Topology 2	Inverting	Inverting
Vin Max, V	16	16
Vin Min, V	2.3	2.3
Vin Min Startup, V	2.3	2.3
Vout Max, V	28	28
Vout Max 2, V	34	34
Vout Min, V	1.23	1.23
Vswitch Max, V	32	32

生态计划

	LT3487EDD#PBF	LT3487EDD#TRPBF
RoHS	Compliant	Compliant

文章

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CCD Bias Supply Integrates 'њOutput Disconnect,'ќ Schottkys and Feedback Resistors &mdash LT Journal
PDF, 257 Kb, 档案已发布: Nov 22, 2006
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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 …
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J-FET-Based DC/DC Converter Starts and Runs from 300mV Supply &mdash LT Journal
PDF, 475 Kb, 档案已发布: Nov 22, 2006
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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, …

模型线

系列: LT3487 (2)

LT3487EDD#PBF LT3487EDD#TRPBF

制造商分类

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