Datasheet Linear Technology LTC3704

Manufacturer	Linear Technology
Series	LTC3704

Wide Input Range, No RSENSE Positive-to-Negative DC/DC Controller

Datasheets

Preview and Download

PDF, 333 Kb, Language: en, File uploaded: Sep 22, 2017, Pages: 28
Wide Input Range, No RSENSE™ Positive-to-Negative DC/DC Controller

Extract from the document

Prices

Packaging

	LTC3704EMS#PBF	LTC3704EMS#TRPBF	LTC3704IMS#PBF	LTC3704IMS#TRPBF
N	1	2	3	4
Package	MS-10 Package Outline Drawing	MS-10 Package Outline Drawing	MS-10 Package Outline Drawing	MS-10 Package Outline Drawing
Package Code	MS	MS	MS	MS
Package Index	05-08-1661	05-08-1661	05-08-1661	05-08-1661
Pin Count	10	10	10	10

Parametrics

Parameters / Models	LTC3704EMS#PBF	LTC3704EMS#TRPBF	LTC3704IMS#PBF	LTC3704IMS#TRPBF
Demo Boards	DC518A,DC524A	DC518A,DC524A	DC518A,DC524A	DC518A,DC524A
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File
Export Control	no	no	no	no
Features	No Rsense, Resistor Set Frequency, External Synchronization, Burst Mode	No Rsense, Resistor Set Frequency, External Synchronization, Burst Mode	No Rsense, Resistor Set Frequency, External Synchronization, Burst Mode	No Rsense, Resistor Set Frequency, External Synchronization, Burst Mode
Frequency, kHz	1000	1000	1000	1000
Frequency Adjust Range	50kHz to 1MHz	50kHz to 1MHz	50kHz to 1MHz	50kHz to 1MHz
Frequency Sync Range	50kHz to 1MHz	50kHz to 1MHz	50kHz to 1MHz	50kHz to 1MHz
Integrated Inductor	no	no	no	no
Ishutdown, µA	10	10	10	10
Isupply, mA	0.250	0.250	0.250	0.250
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
Polyphase	no	no	no	no
Sense Resistor	None	None	None	None
Switch Current, A	20	20	20	20
Synchronous	no	no	no	no
Topology	Inverting	Inverting	Inverting	Inverting
Vin Max, V	36	36	36	36
Vin Min, V	2.5	2.5	2.5	2.5
Vout Max, V	72	72	72	72
Vout Maximum	-3, -5, -12 and higher	-3, -5, -12 and higher	-3, -5, -12 and higher	-3, -5, -12 and higher
Vswitch Max, V	80	80	80	80

Eco Plan

	LTC3704EMS#PBF	LTC3704EMS#TRPBF	LTC3704IMS#PBF	LTC3704IMS#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Design Notes

Download
Reduce Component Count and Improve Efficiency in SLIC and RF Power Supplies &mdash DN282
PDF, 77 Kb, File published: Apr 2, 2002
Extract from the document
advertisement Reduce Component Count and Improve Efficiency in
SLIC and RF Power Supplies вЂ“ Design Note 282
Tick Houk
Introduction
Nonisolated power supplies with negative output
voltages require op amps and other вЂњglueвЂќ circuitry in
order to level-shift the feedback voltage to the error
ampliп¬Ѓer. In applications such as SLIC (subscriber line
interface circuit) power supplies, this extra circuitry
adds unwanted cost and requires more space on the
PC board, with no increase in system performance. A Dual Output SLIC Supply With Simpliп¬Ѓed
Feedback Using the LTC3704
Figure 1 illustrates a dual output telecom power supply
designed for use in subscriber line interface circuits
or SLICs. The input to the SLIC power supply is some
form of battery (lead-acid or lithium-ion, for example)
so that extended talk-time can be provided to POTS
(plain old telephone system) phones during an AC line
failure (or rolling blackout). The output voltage is typically proportional to the distance the subscriber line
runs from the local hub to a house or ofп¬Ѓce, in order
to compensate for the impedance of the loop. Multiple
output supplies are used to supply groups of users at
different distances from the hub. The LTC В®3704 is a high performance, single-ended …

Articles

Download
A High Performance, Single-Ended, No R_SENSE Controller for Negative Output Supplies &mdash LT Journal
PDF, 214 Kb, File published: Mar 1, 2002
Extract from the document
DESIGN FEATURES A High Performance, Single-Ended,
No RSENSE Controller for Negative
Output Supplies
by Tick Houk
Introduction
The LTC3704 is a general-purpose,
single-ended current-mode DC/DC
controller IC that is optimized for use
in negative output converter applications. Unlike traditional controllers,
which are optimized for positive outputs, the LTC3704 has a negative
feedback pin (NFB), which can be
connected directly to a divider from
the negative output to ground. This
direct connection saves space and
expense by eliminating the traditional
glue circuitry normally required to
level-shift the feedback signal above
ground. The LTC3704 provides flexible, high performance operation in a
small MS10 package.
The LTC3704 takes advantage of
Linear Technology CorporationвЂ™s proprietary No RSENSEв„ў technology by
sensing the voltage across the power
MOSFET, as shown in Figure 1. This …

Model Line

Series: LTC3704 (4)

LTC3704EMS#PBF LTC3704EMS#TRPBF LTC3704IMS#PBF LTC3704IMS#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Inverting Regulators

Related publications

Datasheets Datasheet Analog Devices LTC3704

EMS supplier

Slices

Microcontrollers