Datasheet Linear Technology LTC1872ES6#PBF

Manufacturer	Linear Technology
Series	LTC1872
Part Number	LTC1872ES6#PBF

Constant Frequency Current Mode Step-Up DC/DC Controller in SOT-23

Datasheets

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PDF, 266 Kb, Revision: A, File uploaded: Sep 20, 2017

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Packaging

Package	SOT-23
Package Code	S6
Package Index	05-08-1636

Parametrics

Architecture	Constant Frequency Current Mode
Demo Boards	DC328A
Design Tools	LTspice Model
Export Control	no
Features	Burst Mode
Frequency	550 kHz
Integrated Inductor	no
Ishutdown	8 µA
Isupply	0.27 mA
Max Phases	1
Monolithic	no
Number of Outputs	1
Operating Temperature Range	0 to 85 °C
Polyphase	no
Sense Resistor	Rsense
Switch Current	10 A
Synchronous	no
Topology	Boost, Flyback, Sepic
Vin Max	9.8 V
Vin Min	2.5 V
Vin Min Startup	2.5 V
Vout Max	36 V
Vout Maximum	3, 5, 12 and higher
Vout Min	0.8 V
Vswitch Max	36 V

Eco Plan

RoHS

Compliant

Design Notes

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Tiny Step-Up/Step-Down Power Supply Delivers 3.3V at 1.3A in Battery-Powered Devices &mdash DN271
PDF, 74 Kb, File published: Nov 1, 2001
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Tiny Step-Up/Step-Down Power Supply Delivers 3.3V at 1.3A in
Battery-Powered Devices вЂ“ Design Note 271
Keith Szolusha
Introduction
Many of todayвЂ™s cellular phones, PDAs, MP3 players and
other portable devices require that a consistent 3.3V
power supply be delivered from a single, rechargeable
lithium-ion battery. The problem is that a Li-Ion battery
at full charge has a voltage somewhat higher than 3.3V
and loses voltage over the life of a charge to less than
3.3V. A power supply that depends on a Li-Ion requires
a voltage regulator that can maintain consistent 3.3V
output from both high and low inputs. Since typical
Li-Ion applications are portable mass-market devices
where the focus is on short time-to-market, long battery
life, small size and low cost, the regulator must take
minimal space, be highly efп¬Ѓcient and use inexpensive
off-the-shelf components wherever possible. Regulated Output Voltage from a Range of Inputs
Although a SEPIC is only one of many possible conп¬Ѓgurations for a DC/DC converter, it has a major advantage
over other choices when applied in a modern portable
device. The SEPIC in Figure 1 delivers 3.3V output
throughout the input voltage range, 2.7V to 4.2V. One
alternative to the SEPIC conп¬Ѓguration is a simple stepdown converter. A step-down converter delivers 3.3V …

Model Line

Series: LTC1872 (3)

LTC1872ES6#PBF LTC1872ES6#TRMPBF LTC1872ES6#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > SEPIC Regulators
Power Management > Switching Regulator > Step-Up (Boost) Regulators > External Power Switch Boost

Other Names:

LTC1872ES6PBF, LTC1872ES6 PBF