Datasheet Linear Technology LT3685IDD#TRPBF

Manufacturer	Linear Technology
Series	LT3685
Part Number	LT3685IDD#TRPBF

36V, 2A, 2.4MHz Step-Down Switching Regulator

Datasheets

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PDF, 282 Kb, Language: en, File uploaded: Sep 19, 2017, Pages: 24
36V, 2A, 2.4MHz Step-Down Switching Regulator

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Prices

Packaging

Package	3x3 DFN-10
Package Code	DD
Package Index	05-08-1699

Parametrics

Architecture	Constant Frequency Current Mode
Demo Boards	DC1167A,DC1212A-B
Design Tools	LTspice File,LTpowerCAD Model
Export Control	no
Features	Resistor Set Frequency, External Synchronization, Power Good
Frequency	2400 kHz
Frequency Adjust Range	200kHz - 2.4MHz
Frequency Sync Range	250kHz - 2MHz
Integrated Inductor	no
Ishutdown	1.3 µA
Isupply	0.45 mA
Max Phases	1
Monolithic	yes
Number of Outputs	1
Operating Temperature Range	-40 to 85 °C
Output Current	2 A
Over Voltage Protection	60 V
Polyphase	no
Switch Current	3.7 A
Synchronous	no
Topology	Buck
Vin Max	36 V
Vin Min	3.6 V
Vout Max	20 V
Vout Maximum	20V
Vout Min	0.79 V
Vref Accuracy Over Temp	1.9 %

Eco Plan

RoHS

Compliant

Application Notes

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2-Wire Virtual Remote Sensing for Voltage Regulators - Clairvoyance Marries Remote Sensing &mdash AN126
PDF, 1.4 Mb, File published: Oct 1, 2010
Wires and connectors have resistance. This simple, unavoidable truth dictates that a power source’s remote load voltage will be less than the source’s output voltage. Traditional methods for countering this include increasing the power source voltage and "4-wire" remote voltage sensing. Both have limitations. A new IC based approach achieves "virtual" remote sensing at the load without adding the usual two extra sense wires. Numerous circuit examples show the IC working with various voltage regulators and remote loads. Appendices detail IC internal operation and design guidelines for applying the part in any regulator circuit.
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Application Note 126
October 2010
2-Wire Virtual Remote Sensing for Voltage Regulators
Clairvoyance Marries Remote Sensing
Jim Williams, Jesus Rosales, Kurk Mathews, Tom Hack
Introduction
Wires and connectors have resistance. This simple, unavoidable truth dictates that a power sourceвЂ™s remote load
voltage will be less than the sourceвЂ™s output voltage. Figure 1
shows this, and implies that intended load voltage can
be maintained by raising regulator output. Unfortunately,
line resistance and load variations introduce uncertainties,
limiting achievable performance.
WIRING DROPS POWER
SUPPLY LOAD
AN125 F01 WIRING DROPS Figure 1. Unavoidable Wiring Drops Cause Low Load
Voltage. Line and Load Resistance Variations Introduce
Additional Load Voltage Uncertainty, Mitigating Against
Compensation by Raising Supply Voltage LOAD
VOLTAGE
REGULATOR POWER
SUPPLY LOAD
AN125 F02 Figure 2. Local Regulation Stabilizes
Load Voltage But is Inefп¬Ѓcient VOUT+ VOLTAGE DROP Figure 2 illustrates one compensatory approach. Locally …

Model Line

Series: LT3685 (8)

LT3685EDD#PBF LT3685EDD#TRPBF LT3685EMSE#PBF LT3685EMSE#TRPBF LT3685IDD#PBF LT3685IDD#TRPBF LT3685IMSE#PBF LT3685IMSE#TRPBF

Manufacturer's Classification

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

Other Names:

LT3685IDDTRPBF, LT3685IDD TRPBF