Datasheet Linear Technology LTC3729L-6

Manufacturer	Linear Technology
Series	LTC3729L-6

PolyPhase, Synchronous Step-Down Switching Regulator

Datasheets

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PDF, 356 Kb, Language: en, File uploaded: Sep 23, 2017, Pages: 28
PolyPhase, Synchronous Step-Down Switching Regulator

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Packaging

	LTC3729LEUH-6#PBF	LTC3729LEUH-6#TRPBF
N	1	2
Package	5x5 QFN-32 Package Outline Drawing	5x5 QFN-32 Package Outline Drawing
Package Code	UH	UH
Package Index	05-08-1693	05-08-1693
Pin Count	32	32

Parametrics

Parameters / Models	LTC3729LEUH-6#PBF	LTC3729LEUH-6#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode
Design Tools	LTspice Model	LTspice Model
Export Control	no	no
Features	PolyPhase	PolyPhase
Frequency, kHz	550	550
Integrated Inductor	no	no
Ishutdown, µA	20	20
Isupply, mA	0.47	0.47
Max Phases	2, 3, 4, 6, 8, 12	2, 3, 4, 6, 8, 12
Monolithic	no	no
Number of Outputs	1	1
Operating Temperature Range, °C	0 to 85	0 to 85
Output Current, A	40	40
Polyphase	yes	yes
Sense Resistor	Rsense	Rsense
Switch Current, A	40	40
Synchronous	yes	yes
Topology	Buck	Buck
Vin Max, V	30	30
Vin Min, V	4	4
Vout Max, V	5	5
Vout Maximum	5V	5V
Vout Min, V	0.6	0.6
Vref Accuracy Over Temp, %	1	1

Eco Plan

	LTC3729LEUH-6#PBF	LTC3729LEUH-6#TRPBF
RoHS	Compliant	Compliant

Application Notes

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PCB Layout Considerations for Non-Isolated Switching Power Supplies &mdash AN136
PDF, 215 Kb, File published: Sep 20, 2012
The best news when you power up a prototype supply board for the very first time is when it not only works, but also runs quiet and cool. Unfortunately, this does not always happen. A common problem of switching power supplies is “unstable” switching waveforms. Sometimes, waveform jittering is so pronounced that audible noise can be heard from the magnetic components. If the problem is related to the printed circuit board (PCB) layout, identifying the cause can be difficult. This is why proper PCB layout at the early stage of a switching supply design is very critical. Its importance cannot be overstated.
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Application Note 136
June 2012
PCB Layout Considerations for Non-Isolated Switching
Power Supplies
Henry J. Zhang
Introduction
The best news when you power up a prototype supply board
for the very first time is when it not only works, but also
runs quiet and cool. Unfortunately, this does not always
happen. A common problem of switching power supplies
is вЂњunstableвЂќ switching waveforms. Sometimes, waveform
jittering is so pronounced that audible noise can be heard
from the magnetic components. If the problem is related
to the printed circuit board (PCB) layout, identifying the
cause can be difficult. This is why proper PCB layout at
the early stage of a switching supply design is very critical.
Its importance cannot be overstated.
The power supply designer is the person who best understands the technical details and functional requirements of
the supply within the final product. He or she should work
closely with the PCB layout designer on the critical supply
layout from the beginning. A good layout design optimizes
supply efficiency, alleviates thermal stress, and most importantly, minimizes the noise and interactions among traces
and components. To achieve these, it is important for the …

Model Line

Series: LTC3729L-6 (2)

LTC3729LEUH-6#PBF LTC3729LEUH-6#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > External Power Switch Buck Controllers