Datasheet Linear Technology LTC3633

Manufacturer	Linear Technology
Series	LTC3633

Dual Channel 3A, 15V Monolithic Synchronous Step-Down Regulator

Datasheets

Preview and Download

PDF, 411 Kb, Language: en, File uploaded: Sep 22, 2017, Pages: 28
Dual Channel 3A, 15V Monolithic Synchronous Step-Down Regulator

Extract from the document

Prices

Packaging

	LTC3633EFE#PBF	LTC3633EFE#TRPBF	LTC3633EUFD#PBF	LTC3633EUFD#TRPBF	LTC3633IFE#PBF	LTC3633IFE#TRPBF	LTC3633IUFD#PBF	LTC3633IUFD#TRPBF
N	1	2	3	4	5	6	7	8
Package	TSSOP-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing
Package Code	FE	FE	UFD	UFD	FE	FE	UFD	UFD
Package Index	05-08-1663 (EB)	05-08-1663 (EB)	05-08-1712	05-08-1712	05-08-1663 (EB)	05-08-1663 (EB)	05-08-1712	05-08-1712
Pin Count	28	28	28	28	28	28	28	28

Parametrics

Parameters / Models	LTC3633EFE#PBF	LTC3633EFE#TRPBF	LTC3633EUFD#PBF	LTC3633EUFD#TRPBF	LTC3633IFE#PBF	LTC3633IFE#TRPBF	LTC3633IUFD#PBF	LTC3633IUFD#TRPBF
Architecture	Constant Frequency Controlled On-Time Current Mode	Constant Frequency Controlled On-Time Current Mode	Constant Frequency Controlled On-Time Current Mode	Constant Frequency Controlled On-Time Current Mode	Constant Frequency Controlled On-Time Current Mode	Constant Frequency Controlled On-Time Current Mode	Constant Frequency Controlled On-Time Current Mode	Constant Frequency Controlled On-Time Current Mode
Demo Boards	DC1347B	DC1347B	DC1347B	DC1347B	DC1347B	DC1347B	DC1347B	DC1347B
Design Tools	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File	LTspice File,LTpowerCAD File
Export Control	no	no	no	no	no	no	no	no
Features	Anti-Phase Switching, Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Power Good	Anti-Phase Switching, Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Power Good	Anti-Phase Switching, Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Power Good	Anti-Phase Switching, Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Power Good	Anti-Phase Switching, Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Power Good	Anti-Phase Switching, Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Power Good	Anti-Phase Switching, Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Power Good	Anti-Phase Switching, Burst Mode, Resistor Set Frequency, External Synchronization, Tracking, Power Good
Frequency, kHz	4000	4000	4000	4000	4000	4000	4000	4000
Frequency Adjust Range	500kHz - 4MHz	500kHz - 4MHz	500kHz - 4MHz	500kHz - 4MHz	500kHz - 4MHz	500kHz - 4MHz	500kHz - 4MHz	500kHz - 4MHz
Frequency Sync Range	500kHz - 4MHz	500kHz - 4MHz	500kHz - 4MHz	500kHz - 4MHz	500kHz - 4MHz	500kHz - 4MHz	500kHz - 4MHz	500kHz - 4MHz
Integrated Inductor	no	no	no	no	no	no	no	no
Ishutdown, µA	13	13	13	13	13	13	13	13
Isupply, mA	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5
Max Phases	2	2	2	2	2	2	2	2
Monolithic	yes	yes	yes	yes	yes	yes	yes	yes
Number of Outputs	2	2	2	2	2	2	2	2
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Output Current, A	3	3	3	3	3	3	3	3
Output Current 2, A	3	3	3	3	3	3	3	3
Polyphase	yes	yes	yes	yes	yes	yes	yes	yes
Switch Current, A	3.5	3.5	3.5	3.5	3.5	3.5	3.5	3.5
Switch Current 2, A	3.5	3.5	3.5	3.5	3.5	3.5	3.5	3.5
Synchronous	yes	yes	yes	yes	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Topology 1	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Topology 2	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Vin Max, V	15	15	15	15	15	15	15	15
Vin Min, V	3.6	3.6	3.6	3.6	3.6	3.6	3.6	3.6
Vout Max, V	14.7	14.7	14.7	14.7	14.7	14.7	14.7	14.7
Vout Maximum	.98Vin	.98Vin	.98Vin	.98Vin	.98Vin	.98Vin	.98Vin	.98Vin
Vout Min, V	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6
Vout Min 2, V	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6
Vref Accuracy Over Temp, %	1	1	1	1	1	1	1	1

Eco Plan

	LTC3633EFE#PBF	LTC3633EFE#TRPBF	LTC3633EUFD#PBF	LTC3633EUFD#TRPBF	LTC3633IFE#PBF	LTC3633IFE#TRPBF	LTC3633IUFD#PBF	LTC3633IUFD#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

Download
Dual Output Monolithic Synchronous Buck Regulator Operates from 3.6V to 15V Inputs and Delivers 3A Per Channel &mdash DN1020
PDF, 542 Kb, File published: Nov 10, 2010
Extract from the document
advertisement Dual Output Monolithic Synchronous Buck Regulator Operates
from 3.6V to 15V Inputs and Delivers 3A Per Channel вЂ“ Design Note 1020
Tom Gross
Introduction
The LTC3633 is a high efficiency, dual output monolithic
synchronous step-down switching regulator, capable of
delivering 3A of output current per channel from input
voltages between 3.6V and 15V. Its compact 4mm Г— 5mm
QFN package has very low thermal impedance eliminating
the need for an external heat sink. Its high input voltage
capability makes the LTC3633 ideal for 12V distributed
power systems.
1.8V and 3.3V 2MHz Buck Regulator
Figure 1 shows a LTC3633 12VIN to 1.8VOUT and 3.3VOUT,
3A, buck regulator. With the frequency setting pin, RT,
connected to the internal 3.3V regulator rail (INTVCC), this
circuit runs at 2MHz вЂ”the LTC3633 switching frequency
is programmable from 500kHz to as high as 4MHz, and
can also be synchronized to an external clockвЂ”reducing
the value and size of the output capacitors and inductor.
Even with this high switching frequency, the efficiency of
this circuit is good: 87% at full load for the 3.3V regulator and 82% at full load for the 1.8V regulator, at 12VIN
(see Figure 2). …

Model Line

Series: LTC3633 (8)

LTC3633EFE#PBF LTC3633EFE#TRPBF LTC3633EUFD#PBF LTC3633EUFD#TRPBF LTC3633IFE#PBF LTC3633IFE#TRPBF LTC3633IUFD#PBF LTC3633IUFD#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | Internal Power Switch Buck