Datasheet Linear Technology LTC3446

Manufacturer	Linear Technology
Series	LTC3446

Monolithic Buck Regulator with Dual VLDO Regulators

Datasheets

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PDF, 290 Kb, Language: en, File uploaded: Sep 21, 2017, Pages: 20
Monolithic Buck Regulator with Dual VLDO Regulators

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Packaging

	LTC3446EDE#PBF	LTC3446EDE#TRPBF	LTC3446IDE#PBF	LTC3446IDE#TRPBF
N	1	2	3	4
Package	4x3 DFN-14 Package Outline Drawing	4x3 DFN-14 Package Outline Drawing	4x3 DFN-14 Package Outline Drawing	4x3 DFN-14 Package Outline Drawing
Package Code	DE	DE	DE	DE
Package Index	05-08-1708	05-08-1708	05-08-1708	05-08-1708
Pin Count	14	14	14	14

Parametrics

Parameters / Models	LTC3446EDE#PBF	LTC3446EDE#TRPBF	LTC3446IDE#PBF	LTC3446IDE#TRPBF
Buck Output Current, A	1	1	1	1
Demo Boards	DC893A	DC893A	DC893A	DC893A
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no
Features	LDO, Power Good, Burst Mode	LDO, Power Good, Burst Mode	LDO, Power Good, Burst Mode	LDO, Power Good, Burst Mode
LDO Output Current, A	0.3, 0.3	0.3, 0.3	0.3, 0.3	0.3, 0.3
Number of Outputs	3	3	3	3
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 85	-40 to 85
PowerPath	Linear PowerPath, Internal Ideal Diode	Linear PowerPath, Internal Ideal Diode	Linear PowerPath, Internal Ideal Diode	Linear PowerPath, Internal Ideal Diode
Vin Max, V	5.5	5.5	5.5	5.5
Vin Min, V	2.7	2.7	2.7	2.7

Eco Plan

	LTC3446EDE#PBF	LTC3446EDE#TRPBF	LTC3446IDE#PBF	LTC3446IDE#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Design Notes

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One IC Generates Three Sub-2V Power Rails from a Li-Ion Cell &mdash DN419
PDF, 101 Kb, File published: Jun 26, 2007
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One IC Generates Three Sub-2V Power Rails from a Li-Ion Cell
Design Note 419
Frank Lee
Introduction
Shrinking geometries in IC technology have pushed the
operating voltages of todayвЂ™s electronics well below 2V,
presenting a number of design challenges. One common
problem is the need for multiple supply voltages: for
example, one voltage for a CPU core, another for I/O and
still others for peripherals. Sensitive RF, audio and analog
circuitry may require additional dedicated quiet supplies,
separate from less noise-sensitive digital circuits. As the
number of supplies increases, it becomes impractical
to use a separate power supply IC for each voltage and
special-requirements subsystem. Board area would be
quickly consumed by power supplies. One solution to
the space crunch is power supply integration, provided
by a triple regulator like the LTCВ®3446вЂ”three voltages
from a single IC.
Triple Supply in a Tiny Package
The LTC3446 combines a 1A synchronous buck regulator with two 300mA very low dropout (VLDO TM) linear
regulators to provide up to three stepped-down output voltages from a single input voltage, all in a tiny
3mm Г— 4mm DFN. The 2.7V to 5.5V input voltage range …

Model Line

Series: LTC3446 (4)

LTC3446EDE#PBF LTC3446EDE#TRPBF LTC3446IDE#PBF LTC3446IDE#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | Internal Power Switch Buck | Buck Regulator Plus LDO
Power Management > PMIC & Multifunction > Multitopology DC/DC

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