Datasheet Linear Technology LTC3839

Manufacturer	Linear Technology
Series	LTC3839

Fast, Accurate, 2-Phase, Single-Output Step-Down DC/DC Controller with Differential Output Sensing

Datasheets

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PDF, 944 Kb, Language: en, File uploaded: Sep 23, 2017, Pages: 50
Fast, Accurate, 2-Phase, Single-Output Step-Down DC/DC Controller with Differential Output Sensing

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Packaging

	LTC3839EUH#PBF	LTC3839EUH#TRPBF	LTC3839IUH#PBF	LTC3839IUH#TRPBF
N	1	2	3	4
Package	5x5 QFN-32 Package Outline Drawing	5x5 QFN-32 Package Outline Drawing	5x5 QFN-32 Package Outline Drawing	5x5 QFN-32 Package Outline Drawing
Package Code	UH	UH	UH	UH
Package Index	05-08-1693	05-08-1693	05-08-1693	05-08-1693
Pin Count	32	32	32	32

Parametrics

Parameters / Models	LTC3839EUH#PBF	LTC3839EUH#TRPBF	LTC3839IUH#PBF	LTC3839IUH#TRPBF
Architecture	Controlled On-Time Valley Current Mode	Controlled On-Time Valley Current Mode	Controlled On-Time Valley Current Mode	Controlled On-Time Valley Current Mode
Demo Boards	DC1632A	DC1632A	DC1632A	DC1632A
Design Tools	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File
Export Control	no	no	no	no
Features	Differential Remote Sense, External Synchronization, Resistor Set Frequency, PolyPhase, DCR Current Sense, Tracking, Power Good	Differential Remote Sense, External Synchronization, Resistor Set Frequency, PolyPhase, DCR Current Sense, Tracking, Power Good	Differential Remote Sense, External Synchronization, Resistor Set Frequency, PolyPhase, DCR Current Sense, Tracking, Power Good	Differential Remote Sense, External Synchronization, Resistor Set Frequency, PolyPhase, DCR Current Sense, Tracking, Power Good
Frequency, kHz	2000	2000	2000	2000
Frequency Adjust Range	200kHz - 2MHz	200kHz - 2MHz	200kHz - 2MHz	200kHz - 2MHz
Frequency Sync Range	200kHz - 2MHz	200kHz - 2MHz	200kHz - 2MHz	200kHz - 2MHz
Integrated Inductor	no	no	no	no
Ishutdown, µA	15	15	15	15
Isupply, mA	3	3	3	3
Max Phases	2, 3, 4, 6, 12	2, 3, 4, 6, 12	2, 3, 4, 6, 12	2, 3, 4, 6, 12
Monolithic	no	no	no	no
Number of Outputs	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 85	-40 to 85
Output Current, A	60	60	60	60
Polyphase	yes	yes	yes	yes
Sense Resistor	Rsense, DCR	Rsense, DCR	Rsense, DCR	Rsense, DCR
Switch Current, A	60	60	60	60
Synchronous	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck
Vin Max, V	38	38	38	38
Vin Min, V	4.5	4.5	4.5	4.5
Vout Max, V	5.5	5.5	5.5	5.5
Vout Maximum	5.5V	5.5V	5.5V	5.5V
Vout Min, V	0.6	0.6	0.6	0.6
Vref Accuracy Over Temp, %	1	1	1	1

Eco Plan

	LTC3839EUH#PBF	LTC3839EUH#TRPBF	LTC3839IUH#PBF	LTC3839IUH#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Articles

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2MHz Dual DC/DC Controller Halves Settling Time of Load Release Transients, Features 0.67% Differential VOUT Accuracy and Is Primed for High Step-Down Ratios &mdash LT Journal
PDF, 2.7 Mb, File published: Apr 24, 2012
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design features 2MHz Dual DC/DC Controller Halves Settling Time of
Load Release Transients, Features 0.67% Differential VOUT
Accuracy and IsВ Primed for High Step-Down Ratios
Shuo Chen and Terry Groom Electrical conditions once considered extreme are now
the norm. Modern electronic systems demand high
currents and very low voltages that can appear to a
DC/DC converter as an intermittent electrical short. It is
not uncommon for sub-0.9V power supply rails to demand
25A or more. In this environment, tight total differential
regulation accuracy is critical to achieve the demanding
voltage tolerances required to power core processors
and large ASICs. In addition, PCB and component
size constraints have driven up converter operating
frequencies to enable the use of smaller components. VIN
4.5V TO 38V + CIN1
100ВµF CIN2
10ВµF
Г—3 LTspice IV circuits.linear.com/546
VIN 0.1ВµF
3.57k + COUT2
330ВµF
Г—2 SENSE1вЂ“ SENSE2вЂ“ SENSE1+ SENSE2+ BOOST1 BOOST2 0.1ВµF TG1 MT1 3.57k TG2 MT2
DB2 SW1 1ВµF 15k 0.1ВµF DB1 …
Download
Dual, Fast, Step-Down Controller's External Reference Input Enables Dynamic Voltage Scaling from 0.4V to 5.5V and 0.3% Total Combined Regulation Accuracy &mdash LT Journal
PDF, 2.8 Mb, File published: Apr 10, 2013
Extract from the document
design features Dual, Fast, Step-Down ControllerвЂ™s External Reference Input
Enables Dynamic Voltage Scaling from 0.4V to 5.5V and
0.3% Total Combined Regulation Accuracy
Shuo Chen and Terry Groom Low voltage, high current
systems require accurate
differential regulation. It is
not uncommon for power
supply rails at or below
0.9V to demand 25A or
more, with fast transients
that look like intermittent
electrical shorts to the
power supply rail. Such
systems typically require
power supply regulation
accuracy of less than 1%
regulated DC and 3% in the
face of input transients.
Increasingly, core processors and other
large scale digital ICs (such as ASICs and
FPGAs) require dynamic voltage scalingвЂ”either multiple fixed levels, or a
continuously adjusted reference voltage
using a servo loopвЂ”to deliver power …

Model Line

Series: LTC3839 (4)

LTC3839EUH#PBF LTC3839EUH#TRPBF LTC3839IUH#PBF LTC3839IUH#TRPBF

Manufacturer's Classification

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