Datasheet Linear Technology LT3689

Manufacturer	Linear Technology
Series	LT3689

700mA Step-Down Regulator with Power-On Reset and Watchdog Timer

Datasheets

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PDF, 986 Kb, Language: en, File uploaded: Sep 19, 2017, Pages: 34
700mA Step-Down Regulator with Power-On Reset and Watchdog Timer

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Prices

Packaging

	LT3689EMSE#PBF	LT3689EMSE#TRPBF	LT3689EUD#PBF	LT3689EUD#TRPBF	LT3689HMSE#PBF	LT3689HMSE#TRPBF	LT3689IMSE#PBF	LT3689IMSE#TRPBF	LT3689IUD#PBF	LT3689IUD#TRPBF
N	1	2	3	4	5	6	7	8	9	10
Package	MS-16E Package Outline Drawing	MS-16E Package Outline Drawing	3x3 QFN-16 Package Outline Drawing	3x3 QFN-16 Package Outline Drawing	MS-16E Package Outline Drawing	MS-16E Package Outline Drawing	MS-16E Package Outline Drawing	MS-16E Package Outline Drawing	3x3 QFN-16 Package Outline Drawing	3x3 QFN-16 Package Outline Drawing
Package Code	MSE	MSE	UD	UD	MSE	MSE	MSE	MSE	UD	UD
Package Index	05-08-1667	05-08-1667	05-08-1691	05-08-1691	05-08-1667	05-08-1667	05-08-1667	05-08-1667	05-08-1691	05-08-1691
Pin Count	16	16	16	16	16	16	16	16	16	16

Parametrics

Parameters / Models	LT3689EMSE#PBF	LT3689EMSE#TRPBF	LT3689EUD#PBF	LT3689EUD#TRPBF	LT3689HMSE#PBF	LT3689HMSE#TRPBF	LT3689IMSE#PBF	LT3689IMSE#TRPBF	LT3689IUD#PBF	LT3689IUD#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC1312A	DC1312A	DC1312A	DC1312A	DC1312A	DC1312A	DC1312A	DC1312A	DC1312A	DC1312A
Design Tools	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
Features	Burst Mode, Resistor Set Frequency, External Synchronization, Watchdog Timer	Burst Mode, Resistor Set Frequency, External Synchronization, Watchdog Timer	Burst Mode, Resistor Set Frequency, External Synchronization, Watchdog Timer	Burst Mode, Resistor Set Frequency, External Synchronization, Watchdog Timer	Burst Mode, Resistor Set Frequency, External Synchronization, Watchdog Timer	Burst Mode, Resistor Set Frequency, External Synchronization, Watchdog Timer	Burst Mode, Resistor Set Frequency, External Synchronization, Watchdog Timer	Burst Mode, Resistor Set Frequency, External Synchronization, Watchdog Timer	Burst Mode, Resistor Set Frequency, External Synchronization, Watchdog Timer	Burst Mode, Resistor Set Frequency, External Synchronization, Watchdog Timer
Frequency, kHz	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200
Frequency Adjust Range	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz
Frequency Sync Range	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz	350kHz - 2.2MHz
Integrated Inductor	no	no	no	no	no	no	no	no	no	no
Ishutdown, µA	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01
Isupply, mA	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05
Max Phases	1	1	1	1	1	1	1	1	1	1
Monolithic	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Number of Outputs	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	-40 to 125	-40 to 125	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Output Current, A	0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.7
Over Voltage Protection, V	60	60	60	60	60	60	60	60	60	60
Polyphase	no	no	no	no	no	no	no	no	no	no
Switch Current, A	1.55	1.55	1.55	1.55	1.55	1.55	1.55	1.55	1.55	1.55
Synchronous	no	no	no	no	no	no	no	no	no	no
Topology	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Vin Max, V	38	38	38	38	38	38	38	38	38	38
Vin Min, V	3.4	3.4	3.4	3.4	3.4	3.4	3.4	3.4	3.4	3.4
Vout Max, V	34.2	34.2	34.2	34.2	34.2	34.2	34.2	34.2	34.2	34.2
Vout Maximum	0.9Vin	0.9Vin	0.9Vin	0.9Vin	0.9Vin	0.9Vin	0.9Vin	0.9Vin	0.9Vin	0.9Vin
Vout Min, V	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8
Vref Accuracy Over Temp, %	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5

Eco Plan

	LT3689EMSE#PBF	LT3689EMSE#TRPBF	LT3689EUD#PBF	LT3689EUD#TRPBF	LT3689HMSE#PBF	LT3689HMSE#TRPBF	LT3689IMSE#PBF	LT3689IMSE#TRPBF	LT3689IUD#PBF	LT3689IUD#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Other Options

LT3689-5 LT3689-5

Articles

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Industrial/Automotive Step-Down Regulator Accepts 3.6V to 36V and Includes Power-On Reset and Watchdog Timer in 3mm × 3mm QFN &mdash LT Journal
PDF, 218 Kb, File published: Mar 1, 2009
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LвЂ‰DESIGN FEATURES Industrial/Automotive Step-Down
Regulator Accepts 3.6V to 36V
and Includes Power-On Reset and
Watchdog Timer in 3mm Г— 3mm QFN
by Ramanjot Singh Introduction
As the number of microprocessors in
automotive and industrial applications continues to expand, so does the
need for rugged step-down regulators
that can operate over a wide input
voltage range and withstand high
voltage transients and output shorts.
Microprocessor-based applications
also require supervisory functions,
such as power-on reset (POR) and
watchdog timing, to ensure high system reliability. The regulator must
have high efficiency at light loads
to increase battery life. The LT3689
delivers all of these features in tiny
16-pin 3mm Г— 3mm QFN and 16-pin
MSOP packages. Features of the LT3689
Step-Down Regulator The LT3689 employs a constant frequency, current mode architecture to
provide 800mA of continuous output
current. The part operates from a …

Model Line

Series: LT3689 (10)

LT3689EMSE#PBF LT3689EMSE#TRPBF LT3689EUD#PBF LT3689EUD#TRPBF LT3689HMSE#PBF LT3689HMSE#TRPBF LT3689IMSE#PBF LT3689IMSE#TRPBF LT3689IUD#PBF LT3689IUD#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | Internal Power Switch Buck | High Input Voltage Buck
Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Switching Regulators