Datasheet Linear Technology LTC3642

Manufacturer	Linear Technology
Series	LTC3642

High Efficiency, High Voltage 50mA Synchronous Step-Down Converter

Datasheets

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PDF, 1.8 Mb, Language: en, File uploaded: Sep 22, 2017, Pages: 22
High Efficiency, High Voltage 50mA Synchronous Step-Down Converter

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Prices

Packaging

	LTC3642EDD#PBF	LTC3642EDD#TRPBF	LTC3642EDD-3.3#PBF	LTC3642EDD-3.3#TRPBF	LTC3642EDD-5#PBF	LTC3642EDD-5#TRPBF	LTC3642EMS8E#PBF	LTC3642EMS8E#TRPBF	LTC3642EMS8E-3.3#PBF	LTC3642EMS8E-3.3#TRPBF	LTC3642EMS8E-5#PBF	LTC3642EMS8E-5#TRPBF	LTC3642IDD#PBF	LTC3642IDD#TRPBF	LTC3642IDD-3.3#PBF	LTC3642IDD-3.3#TRPBF	LTC3642IDD-5#PBF	LTC3642IDD-5#TRPBF	LTC3642IMS8E#PBF	LTC3642IMS8E#TRPBF	LTC3642IMS8E-3.3#PBF	LTC3642IMS8E-3.3#TRPBF	LTC3642IMS8E-5#PBF	LTC3642IMS8E-5#TRPBF
N	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24
Package	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	MS-8E Package Outline Drawing	MS-8E Package Outline Drawing	MS-8E Package Outline Drawing	MS-8E Package Outline Drawing	MS-8E Package Outline Drawing	MS-8E Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	MS-8E Package Outline Drawing	MS-8E Package Outline Drawing	MS-8E Package Outline Drawing	MS-8E Package Outline Drawing	MS-8E Package Outline Drawing	MS-8E Package Outline Drawing
Package Code	DD	DD	DD	DD	DD	DD	MS8E	MS8E	MS8E	MS8E	MS8E	MS8E	DD	DD	DD	DD	DD	DD	MS8E	MS8E	MS8E	MS8E	MS8E	MS8E
Package Index	05-08-1698	05-08-1698	05-08-1698	05-08-1698	05-08-1698	05-08-1698	05-08-1662	05-08-1662	05-08-1662	05-08-1662	05-08-1662	05-08-1662	05-08-1698	05-08-1698	05-08-1698	05-08-1698	05-08-1698	05-08-1698	05-08-1662	05-08-1662	05-08-1662	05-08-1662	05-08-1662	05-08-1662
Pin Count	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8

Parametrics

Parameters / Models	LTC3642EDD#PBF	LTC3642EDD#TRPBF	LTC3642EDD-3.3#PBF	LTC3642EDD-3.3#TRPBF	LTC3642EDD-5#PBF	LTC3642EDD-5#TRPBF	LTC3642EMS8E#PBF	LTC3642EMS8E#TRPBF	LTC3642EMS8E-3.3#PBF	LTC3642EMS8E-3.3#TRPBF	LTC3642EMS8E-5#PBF	LTC3642EMS8E-5#TRPBF	LTC3642IDD#PBF	LTC3642IDD#TRPBF	LTC3642IDD-3.3#PBF	LTC3642IDD-3.3#TRPBF	LTC3642IDD-5#PBF	LTC3642IDD-5#TRPBF	LTC3642IMS8E#PBF	LTC3642IMS8E#TRPBF	LTC3642IMS8E-3.3#PBF	LTC3642IMS8E-3.3#TRPBF	LTC3642IMS8E-5#PBF	LTC3642IMS8E-5#TRPBF
Architecture	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode
Demo Boards	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A	DC1429A
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File
Export Control	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Features	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle	Burst Mode, 100% Duty Cycle
Integrated Inductor	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Ishutdown, µA	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3
Isupply, mA	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012
Max Phases	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Monolithic	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Number of Outputs	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	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	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Output Current, A	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05
Over Voltage Protection, V	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60
Polyphase	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Switch Current, A	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115	0.115
Synchronous	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Vin Max, V	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45
Vin Min, V	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5
Vout Max, V	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45
Vout Maximum	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin
Vout Min, V	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8
Vref Accuracy Over Temp, %	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1

Eco Plan

	LTC3642EDD#PBF	LTC3642EDD#TRPBF	LTC3642EDD-3.3#PBF	LTC3642EDD-3.3#TRPBF	LTC3642EDD-5#PBF	LTC3642EDD-5#TRPBF	LTC3642EMS8E#PBF	LTC3642EMS8E#TRPBF	LTC3642EMS8E-3.3#PBF	LTC3642EMS8E-3.3#TRPBF	LTC3642EMS8E-5#PBF	LTC3642EMS8E-5#TRPBF	LTC3642IDD#PBF	LTC3642IDD#TRPBF	LTC3642IDD-3.3#PBF	LTC3642IDD-3.3#TRPBF	LTC3642IDD-5#PBF	LTC3642IDD-5#TRPBF	LTC3642IMS8E#PBF	LTC3642IMS8E#TRPBF	LTC3642IMS8E-3.3#PBF	LTC3642IMS8E-3.3#TRPBF	LTC3642IMS8E-5#PBF	LTC3642IMS8E-5#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Articles

Download
Robust DC/DC Step-Down Converter in 3mm × 3mm DFN Resists 60V Input Surges &mdash LT Journal
PDF, 565 Kb, File published: Sep 1, 2009
Extract from the document
LвЂ‰DESIGN IDEAS Robust DC/DC Step-Down Converter
in 3mm Г— 3mm DFN Resists 60V
by Chuen Ming Tan
Input Surges
Introduction The LTC3642 comes in compact 3mm
Г— 3mm DFN and MS8E packages with
integrated MOSFETs, as shown in
Figure 2. It is extremely easy to use,
requiring no loop compensation. The
3.3V and 5V fixed output versions only
need two capacitors and an inductor
for operation (see Figure 3).
The constant peak switch current
thresholds of these devices inherently
protect them from output short circuits. Moreover, each of these devices
can reduce its peak switch current
threshold such that smaller input and
output capacitors can be used.
When operating with a high input
voltage source, the LTC3642вЂ™s RUN
pin can be optionally configured to VIN
10V/DIV 50Вµs/DIV Figure 1. The LTC3642 continues to regulate
the output despite a >45V spike on the input. 150ВµH VIN …

Model Line

Series: LTC3642 (24)

LTC3642EDD#PBF LTC3642EDD#TRPBF LTC3642EDD-3.3#PBF LTC3642EDD-3.3#TRPBF LTC3642EDD-5#PBF LTC3642EDD-5#TRPBF LTC3642EMS8E#PBF LTC3642EMS8E#TRPBF LTC3642EMS8E-3.3#PBF LTC3642EMS8E-3.3#TRPBF LTC3642EMS8E-5#PBF LTC3642EMS8E-5#TRPBF LTC3642IDD#PBF LTC3642IDD#TRPBF LTC3642IDD-3.3#PBF LTC3642IDD-3.3#TRPBF LTC3642IDD-5#PBF LTC3642IDD-5#TRPBF LTC3642IMS8E#PBF LTC3642IMS8E#TRPBF LTC3642IMS8E-3.3#PBF LTC3642IMS8E-3.3#TRPBF LTC3642IMS8E-5#PBF LTC3642IMS8E-5#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | Internal Power Switch Buck | High Input Voltage Buck