LTC3404IMS8 datasheet, PDF - EEWORLD Datasheet

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LTC3404IMS8: DescriptionSwitching Regulator, Current-mode, 1.5A, 1650kHz Switching Freq-Max, CMOS, PDSO8; CategoryPower/power management The power supply circuit; File Size200KB，16 Pages; ManufacturerADI; Websitehttps://www.analog.com

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LTC3404IMS8 Overview

Switching Regulator, Current-mode, 1.5A, 1650kHz Switching Freq-Max, CMOS, PDSO8

LTC3404IMS8 Parametric

Parameter Name	Attribute value
Control Technology	PULSE WIDTH MODULATION
Number of functions	1
technology	CMOS
Temperature level	INDUSTRIAL
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
control mode	CURRENT-MODE
surface mount	YES
Switch configuration	BUCK
Maximum switching frequency	1650 kHz
Maximum input voltage	6 V
Minimum input voltage	2.65 V
Nominal input voltage	3.6 V
Maximum output current	1.5 A
Certification status	Not Qualified
JESD-30 code	S-PDSO-G8
JESD-609 code	e0
length	3 mm
Maximum seat height	1.1 mm
width	3 mm
Humidity sensitivity level	1
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Number of terminals	8
Package shape	SQUARE
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Terminal pitch	0.65 mm
Terminal location	DUAL
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	GULL WING
Reach Compliance Code	Not Compliant
YTEOL	0
package instruction	TSSOP,
ECCN code	EAR99
Is Samacsys	N
Objectid	4002731061
Is it Rohs certified?	No

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LTC3404

1.4MHz High Efficiency

Monolithic Synchronous

Step-Down Regulator

FEATURES

■

DESCRIPTIO

High Efficiency: Up to 95%

Very Low Quiescent Current: Only 10

During Operation

600mA Output Current at V

= 3.3V

2.65V to 6V Input Voltage Range

1.4MHz Constant Frequency Operation

No Schottky Diode Required

Low Dropout Operation: 100% Duty Cycle

Synchronizable from 1MHz to 1.7MHz

Selectable Burst Mode

Operation or

Pulse Skipping Mode

0.8V Reference Allows Low Output Voltages

Shutdown Mode Draws < 1μA Supply Current

±2%

Output Voltage Accuracy

Current Mode Control for Excellent Line and

Load Transient Response

Overcurrent and Overtemperature Protected

Available in 8-Lead MSOP Package

The LTC

3404 is a high efficiency monolithic synchro-

nous buck regulator using a constant frequency, current

mode architecture. Supply current during operation is

only 10μA and drops to < 1μA in shutdown. The 2.65V to

6V input voltage range makes the LTC3404 ideally suited

for single Li-Ion battery-powered applications. 100% duty

cycle provides low dropout operation, extending battery

life in portable systems.

Switching frequency is internally set at 1.4MHz, allowing

the use of small surface mount inductors and capacitors.

For noise sensitive applications the LTC3404 can be

externally synchronized from 1MHz to 1.7MHz. Burst

Mode operation is inhibited during synchronization or

when the SYNC/MODE pin is pulled low, preventing low

frequency ripple from interfering with audio circuitry.

The internal synchronous switch increases efficiency and

eliminates the need for an external Schottky diode. Low

output voltages are easily supported with the 0.8V feed-

back reference voltage. The LTC3404 is available in a

space saving 8-lead MSOP package.

For higher input voltage (11V abs max) applications, refer

to the LTC1877 data sheet.

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

Burst Mode is a registered trademark of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

APPLICATIO S

■

Cellular Telephones

Wireless and DSL Modems

Personal Information Appliances

Portable Instruments

Distributed Power Systems

Battery-Powered Equipment

TYPICAL APPLICATIO

2.65V

TO 6V

10μF***

CER

47pF

SYNC

RUN

GND V

Efficiency vs Output Load Current

100

EFFICIENCY (%)

High Efficiency Step-Down Converter

4.7μH*

20pF

OUT

†

3.3V

22μF**

CER

LTC3404

887k

280k

3404 TA01

*TOKO D52LC A914BYW-4R7M

**TAIYO-YUDEN CERAMIC JMK325BJ226MM

***TAIYO-YUDEN CERAMIC LMK325BJ106MN

†

OUT

CONNECTED TO V

FOR 2.65V < V

< 3.3V

0.1

= 3.6V

= 4.2V

= 6V

Burst Mode OPERATION

OUT

= 3.3V

L = 4.7μH

LOAD (mA)

100

1000

3404 TA02

3404fb

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