Datasheet Linear Technology LTC3250 — Datenblatt

Hersteller	Linear Technology
Serie	LTC3250

Hocheffizienter, rauscharmer, induktorloser DC / DC-Abwärtswandler

Datenblätter

PDF, 334 Kb, Revision: A, Datei hochgeladen: Sep 27, 2017

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Preise

Verpackung

	LTC3250ES6-1.2#PBF	LTC3250ES6-1.2#TRMPBF	LTC3250ES6-1.2#TRPBF	LTC3250ES6-1.5#PBF	LTC3250ES6-1.5#TRMPBF	LTC3250ES6-1.5#TRPBF
N	1	2	3	4	5	6
Package	SOT-23 Paketumrisszeichnung	SOT-23 Paketumrisszeichnung	SOT-23 Paketumrisszeichnung	SOT-23 Paketumrisszeichnung	SOT-23 Paketumrisszeichnung	SOT-23 Paketumrisszeichnung
Package Code	S6	S6	S6	S6	S6	S6
Package Index	05-08-1636	05-08-1636	05-08-1636	05-08-1636	05-08-1636	05-08-1636
Pin Count	6	6	6	6	6	6

Parameter

Parameters / Models	LTC3250ES6-1.2#PBF	LTC3250ES6-1.2#TRMPBF	LTC3250ES6-1.2#TRPBF	LTC3250ES6-1.5#PBF	LTC3250ES6-1.5#TRMPBF	LTC3250ES6-1.5#TRPBF
Demo Boards	DC488A	DC488A	DC488A	DC488A	DC488A	DC488A
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no	no	no
Frequency, kHz	1500	1500	1500	1500	1500	1500
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	0.035	0.035	0.035	0.035	0.035	0.035
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	0.25	0.25	0.25	0.25	0.25	0.25
Output Voltage	1.2V, 1.5V	1.2V, 1.5V	1.2V, 1.5V	1.2V, 1.5V	1.2V, 1.5V	1.2V, 1.5V
Vin Max, V	5.5	5.5	5.5	5.5	5.5	5.5
Vin Min, V	3.1	3.1	3.1	3.1	3.1	3.1

Öko-Plan

	LTC3250ES6-1.2#PBF	LTC3250ES6-1.2#TRMPBF	LTC3250ES6-1.2#TRPBF	LTC3250ES6-1.5#PBF	LTC3250ES6-1.5#TRMPBF	LTC3250ES6-1.5#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Konstruktionshinweise

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New Step-Down Charge Pumps are Tiny, Efficient and Very Low Noise &mdash DN310
PDF, 126 Kb, Datei veröffentlicht: 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 …

Artikel

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Inductorless, Low Noise Step-Down DC/DC Converter Saves Space and Provides Efficient 1.5V Output &mdash LT Journal
PDF, 143 Kb, Datei veröffentlicht: Aug 9, 2004
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DESIGN IDEAS Inductorless, Low Noise Step-Down
DC/DC Converter Saves Space and
Provides Efficient 1.5V Output by Bill Walter
Introduction
Linear TechnologyвЂ™s new LTC32501.5 switched capacitor step-down DC/
DC converter squeezes into the tightest spaces while providing up to
250mA of output current at 1.5V from
a single 3.1V to 5.5V supply. To keep
the converter footprint small, the
LTC3250 operates at high frequency,
allowing the use of tiny low cost ceramic capacitorsвЂ”no inductors are
required. The LTC3250 is available in
a tiny 6-pin ThinSOT package making it possible to build a complete
converter in an area of less than
0.04in2, as shown on the board in
FigureвђЈ 1.
The LTC3250 uses a 2-to-1
switched capacitor fractional conversion mode to achieve a 50% efficiency
improvement over that of a linear
regulator. A single input and output
capacitor, and an external flying capacitor are all that is needed for
operation.
The LTC3250 also features Burst …

Modellreihe

Serie: LTC3250 (6)

LTC3250ES6-1.2#PBF LTC3250ES6-1.2#TRMPBF LTC3250ES6-1.2#TRPBF LTC3250ES6-1.5#PBF LTC3250ES6-1.5#TRMPBF LTC3250ES6-1.5#TRPBF

Herstellerklassifikation

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

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