Datasheet Linear Technology LTC3251

Manufacturer	Linear Technology
Series	LTC3251

500mA High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converters

Datasheets

PDF, 383 Kb, Revision: B, File uploaded: Sep 27, 2017

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Prices

Packaging

	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 Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing
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

Parametrics

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

Eco Plan

	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

Design Notes

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

Model Line

Series: LTC3251 (6)

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

Manufacturer's Classification

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

EMS supplier

Slices

Microcontrollers