Datasheet Linear Technology LTC3421

Manufacturer	Linear Technology
Series	LTC3421

3A, 3MHz Micropower Synchronous Boost Converter with Output Disconnect

Datasheets

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PDF, 246 Kb, File uploaded: Sep 21, 2017

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Prices

Packaging

	LTC3421EUF#PBF	LTC3421EUF#TRPBF
N	1	2
Package	4x4 QFN-24 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing
Package Code	UF	UF
Package Index	05-08-1697	05-08-1697
Pin Count	24	24

Parametrics

Parameters / Models	LTC3421EUF#PBF	LTC3421EUF#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC565A	DC565A
Design Tools	LTspice Model	LTspice Model
Export Control	no	no
Features	Output Disconnect, Burst Mode, Resistor Set Frequency, External Synchronization	Output Disconnect, Burst Mode, Resistor Set Frequency, External Synchronization
Frequency, kHz	3000	3000
Frequency Adjust Range	100kHz - 3MHz	100kHz - 3MHz
Frequency Sync Range	100kHz - 3MHz	100kHz - 3MHz
Integrated Inductor	no	no
Ishutdown, µA	0.1	0.1
Isupply, mA	0.012	0.012
Monolithic	yes	yes
Number of Outputs	1	1
Operating Temperature Range, °C	0 to 85	0 to 85
Polyphase	no	no
Switch Current, A	4.2	4.2
Synchronous	yes	yes
Topology	Boost	Boost
Vin Max, V	4.5	4.5
Vin Min, V	0.5	0.5
Vin Min Startup, V	0.88	0.88
Vout Max, V	5.25	5.25
Vout Min, V	2.4	2.4
Vswitch Max, V	6	6

Eco Plan

	LTC3421EUF#PBF	LTC3421EUF#TRPBF
RoHS	Compliant	Compliant

Articles

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LCD Power Supply Provides ±15V Plus LED Driver &mdash LT Journal
PDF, 84 Kb, File published: May 1, 2004
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DESIGN IDEAS LCD Power Supply Provides
В±15V Plus LED Driver
VIN
2.7V
TO 4.2V L1
10ВµH
CIN
4.7ВµF
6.3V 15mA SW1 VOUT1 VIN
SHDN1 SHDN2
SW2 374k
1% D2 C1
0.1ВµF L2
10ВµH C2
0.1ВµF B0540W CLED
0.47ВµF
16V VREF
FB2 GND LED1 LED2 LED3 R1
82.5 FB1 LT3463 COUT1, COUT2:
CLED:
L1, L2:
LED1вЂ“LED3:
10pF …
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Synchronous Boost Converter with Output Disconnect Delivers 4W from Two Cells &mdash LT Journal
PDF, 137 Kb, File published: May 1, 2004
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DESIGN IDEAS Synchronous Boost Converter
with Output Disconnect
Delivers 4W from Two Cells by Dongyan Zhou
Introduction
Portable, battery-powered devices require power supplies that are efficient
and small. The LTC3421 synchronous
boost converter offers both. It features
a low, 12ВµA quiescent current in Burst
Mode operation, greatly improving battery life in applications that spend
much of their time in low power mode.
The LTC3421 itself is small, available
in a small 4mm Г— 4mm QFN package,
and its oscillator frequency can be programmed or synchronized up to 3MHz,
which minimizes the size of external
components. It can drive power hungry
circuits with its 3A guaranteed switch
currentвЂ”up to 4W output power from
two NiCd or NiMH cells.
In a conventional synchronous
boost converter, the internal body
diode of the synchronous rectifier
connects the input supply through the
inductor to the load. The peak inrush …

Model Line

Series: LTC3421 (2)

LTC3421EUF#PBF LTC3421EUF#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Up (Boost) Regulators > Micropower Boost | Internal Power Switch Boost