Datasheet Linear Technology LTC3251 — 数据表

制造商	Linear Technology
系列	LTC3251

500mA高效，低噪声，无电感降压型DC / DC转换器

数据表

PDF, 383 Kb, 修订版: B, 文件上传: Sep 27, 2017

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价格

打包

	LTC3251EMSE#PBF	LTC3251EMSE#TRPBF	LTC3251EMSE-1.2#PBF	LTC3251EMSE-1.2#TRPBF	LTC3251EMSE-1.5#PBF	LTC3251EMSE-1.5#TRPBF
N	1	2	3	4	5	6
Package	MS-10E 包装外形图	MS-10E 包装外形图	MS-10E 包装外形图	MS-10E 包装外形图	MS-10E 包装外形图	MS-10E 包装外形图
Package Code	MSE	MSE	MSE	MSE	MSE	MSE
Package Index	05-08-1664	05-08-1664	05-08-1664	05-08-1664	05-08-1664	05-08-1664
Pin Count	10	10	10	10	10	10

参数化

Parameters / Models	LTC3251EMSE#PBF	LTC3251EMSE#TRPBF	LTC3251EMSE-1.2#PBF	LTC3251EMSE-1.2#TRPBF	LTC3251EMSE-1.5#PBF	LTC3251EMSE-1.5#TRPBF
Demo Boards	DC506A	DC506A	DC506A	DC506A	DC506A	DC506A
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no	no	no
Frequency, kHz	1600	1600	1600	1600	1600	1600
Function	Regulated Step-Down Charge Pump	Regulated Step-Down Charge Pump	Regulated Step-Down Charge Pump	Regulated Step-Down Charge Pump	Regulated Step-Down Charge Pump	Regulated Step-Down Charge Pump
Ishutdown, µA	1	1	1	1	1	1
Isupply, mA	0.009	0.009	0.009	0.009	0.009	0.009
Number of Outputs	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85
Output Current, A	0.5	0.5	0.5	0.5	0.5	0.5
Output Voltage	1.2V, 1.5V, Adj	1.2V, 1.5V, Adj	1.2V, 1.5V, Adj	1.2V, 1.5V, Adj	1.2V, 1.5V, Adj	1.2V, 1.5V, Adj
Vin Max, V	5.5	5.5	5.5	5.5	5.5	5.5
Vin Min, V	2.7	2.7	2.7	2.7	2.7	2.7

生态计划

	LTC3251EMSE#PBF	LTC3251EMSE#TRPBF	LTC3251EMSE-1.2#PBF	LTC3251EMSE-1.2#TRPBF	LTC3251EMSE-1.5#PBF	LTC3251EMSE-1.5#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

设计须知

下载
New Step-Down Charge Pumps are Tiny, Efficient and Very Low Noise &mdash DN310
PDF, 126 Kb, 档案已发布: May 1, 2003
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Step-Down Charge Pumps Are Tiny, Efficient
and Very Low Noise вЂ“ Design Note 310
William Walter
Introduction
Inductorless charge pump DC/DC converters are popular
in space-constrained applications with 10mA to 500mA
load currents. Such converters are available in small
packages, operate with very low quiescent current and
require minimal external components. However, the
downside for most charge pumps is noise. Noise that
is generated at the power input can interfere with RF
transmission and reception in wireless applications, and
noise at the output can couple into sensitive circuits
or even create audible noise. The new LTCВ®3250 and
LTC3251 step-down charge pumps solve this problem
with a new switching architecture that mitigates noise
without sacriп¬Ѓcing any of the space saving, high efп¬Ѓciency beneп¬Ѓts typical of charge pump converters.
The LTC3250-1.5 is optimized for applications that require up to 250mA of current from a п¬Ѓxed 1.5V output,
and where space is at an absolute premium. The LTC3251
provides more п¬‚exibility in a slightly larger footprint:
it features an adjustable output voltage (0.9V to 1.6V),
up to 500mA output, ultralow input and output noise
and spread spectrum operation. Both ICs use 2-to-1 …

模型线

系列: LTC3251 (6)

LTC3251EMSE#PBF LTC3251EMSE#TRPBF LTC3251EMSE-1.2#PBF LTC3251EMSE-1.2#TRPBF LTC3251EMSE-1.5#PBF LTC3251EMSE-1.5#TRPBF

制造商分类

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

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