Datasheet Linear Technology LT1940L — 数据表

制造商	Linear Technology
系列	LT1940L

双路单片1.4A，1.1MHz降压开关稳压器

数据表

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PDF, 288 Kb, 语言: en, 文件上传: Sep 3, 2017, 页数: 20
Dual Monolithic 1.4A, 1.1MHz Step-Down Switching Regulator

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打包

	LT1940LEFE#PBF	LT1940LEFE#TRPBF
N	1	2
Package	TSSOP-16 包装外形图	TSSOP-16 包装外形图
Package Code	FE	FE
Package Index	05-08-1663 (BA)	05-08-1663 (BA)
Pin Count	16	16

参数化

Parameters / Models	LT1940LEFE#PBF	LT1940LEFE#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC519A	DC519A
Design Tools	LTspice Model,LTpowerCAD Model	LTspice Model,LTpowerCAD Model
Export Control	no	no
Features	Anti-Phase Switching, Power Good	Anti-Phase Switching, Power Good
Frequency, kHz	1100	1100
Integrated Inductor	no	no
Ishutdown, µA	30	30
Isupply, mA	3.8	3.8
Max Phases	2	2
Monolithic	yes	yes
Number of Outputs	2	2
Operating Temperature Range, °C	0 to 85	0 to 85
Output Current, A	1.4	1.4
Output Current 2, A	1.4	1.4
Polyphase	yes	yes
Switch Current, A	2.4	2.4
Switch Current 2, A	2.4	2.4
Synchronous	no	no
Topology	Buck	Buck
Topology 1	Buck	Buck
Topology 2	Buck	Buck
Vin Max, V	7	7
Vin Min, V	3.6	3.6
Vout Max, V	22	22
Vout Maximum	.88VIN	.88VIN
Vout Min, V	1.25	1.25
Vout Min 2, V	1.25	1.25

生态计划

	LT1940LEFE#PBF	LT1940LEFE#TRPBF
RoHS	Compliant	Compliant

其他选择

设计须知

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Dual Monolithic Buck Regulator Provides Two 1.4A Outputs with 2-Phase Switching to Reduce EMI &mdash DN305
PDF, 82 Kb, 档案已发布: Mar 1, 2003
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advertisement Dual Monolithic Buck Regulator Provides Two 1.4A Outputs
with 2-Phase Switching to Reduce EMI вЂ“ Design Note 305
Jeff Witt
Introduction
Advanced electronic systems that use a single voltage
supply are a thing of the past. TodayвЂ™s electronic systems require several regulated voltages; even relatively
simple subsystems need a minimum of two supplies.
Microprocessors and DSPs, for example, might require
both a 1.8V core supply and a 3.3V supply for I/O and
memory. Many board level systems require both 3.3V
and 5V. Added to this mix is the ever increasing packaging density of electronic products. Voltage regulators
must п¬Ѓt in a small space in close proximity to sensitive
circuits, meaning they must be small, efп¬Ѓcient and low
noise. Linear regulators may generate too much heat,
or be too bulky for some applications, and switching
regulators present possible EMI problems.
Circuit Description
The LTВ®1940 is a dual step-down switching regulator
that solves these problems for systems requiring two or
VIN
7V TO 25V more regulated voltages. Its wide input range, 3.6V to
25V, accepts a variety of power sources. The low proп¬Ѓle
16-lead TSSOP package has an exposed metal backside, …

模型线

系列: LT1940L (2)

LT1940LEFE#PBF LT1940LEFE#TRPBF

制造商分类

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | Internal Power Switch Buck

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