LTC3405ES6 datasheet, PDF - EEWORLD Datasheet

LTC3405ES6: DescriptionConv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 5.5V 0.3A 6-Pin TSOT-23; File Size231KB，16 Pages; ManufacturerADI; Websitehttps://www.analog.com

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LTC3405ES6 Overview

Conv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 5.5V 0.3A 6-Pin TSOT-23

LTC3405ES6 Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Not Compliant
ECCN (US)	EAR99
Part Status	Unconfirmed
SVHC	Yes
SVHC Exceeds Threshold	Yes
Type	Synchronous Step Down
Output Type	Adjustable
Switching Frequency (kHz)	1800
Switching Regulator	Yes
Number of Outputs	1
Output Voltage (V)	0.8 to 5.5
Maximum Output Current (A)	0.3
Minimum Input Voltage (V)	2.5
Maximum Input Voltage (V)	5.5
Operating Supply Voltage (V)	2.5 to 5.5
Typical Quiescent Current (uA)	20
Line Regulation	0.4%/V
Load Regulation	0.5%(Typ)
Efficiency (%)	96
Minimum Operating Temperature (°C)	-40
Maximum Operating Temperature (°C)	85
Supplier Temperature Grade	Extended
Pin Count	6
Standard Package Name	SOT-23
Supplier Package	TSOT-23
Mounting	Surface Mount
Package Height	0.9(Max)
Package Length	2.9
Package Width	1.75(Max)
PCB changed	6
Lead Shape	Gull-wing

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LTC3405

1.5MHz, 300mA

Synchronous Step-Down

Regulator in ThinSOT

FEATURES

■

DESCRIPTIO

High Efficiency: Up to 96%

Very Low Quiescent Current: Only 20

During Operation

300mA Output Current at V

= 3V

2.5V to 5.5V Input Voltage Range

1.5MHz Constant Frequency Operation

No Schottky Diode Required

Low Dropout Operation: 100% Duty Cycle

0.8V Reference Allows Low Output Voltages

Shutdown Mode Draws < 1µA Supply Current

±2%

Output Voltage Accuracy

Current Mode Operation for Excellent Line and

Load Transient Response

Overtemperature Protected

Low Profile (1mm) ThinSOT

Package

The LTC

3405 is a high efficiency monolithic synchro-

nous buck regulator using a constant frequency, current

mode architecture. Supply current during operation is

only 20µA and drops to <1µA in shutdown. The 2.5V to

5.5V input voltage range makes the LTC3405 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 1.5MHz, allowing

the use of small surface mount inductors and capacitors.

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 LTC3405 is available in a low

profile (1mm) ThinSOT package.

For new designs, refer to the LTC3405A data sheet. For

fixed 1.5V and 1.8V output versions, refer to the

LTC3405A-1.5/LTC3405A-1.8 data sheet.

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

ThinSOT is a trademark of Linear Technology Corporation.

Protected by U.S. Patents, including 6580258, 5481178.

APPLICATIO S

■

Cellular Telephones

Personal Information Appliances

Wireless and DSL Modems

Digital Still Cameras

MP3 Players

Portable Instruments

TYPICAL APPLICATIO

2.7V

TO 5.5V

†

2.2µF

CER

RUN

MODE

GND

100

= 3.6V

4.7µH**

22pF

EFFICIENCY (%)

OUT

3.3V

= 5.5V

0.1

= 4.2V

LTC3405

OUT

††

33µF

887k

280k

3405 F01a

OUT

CONNECTED TO V

FOR 2.7V < V

< 3.3V

**MURATA LQH3C4R7M34

†

TAIYO YUDEN LMK212BJ225MG

††

AVX TPSB336K006R0600

Figure 1a. High Efficiency Step-Down Converter

Figure 1b. Efficiency vs Load Current

3405fa

100

OUTPUT CURRENT (mA)

1000

3405 F01b

LTC3405ES6 Related Products

	LTC3405ES6	LTC3405ES6#TR	LTC3405ES6#TRMPBF	LTC3405ES6#TRPBF
Description	Conv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 5.5V 0.3A 6-Pin TSOT-23	Conv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 5.5V 0.3A 6-Pin TSOT-23 T/R	Conv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 5.5V 0.3A 6-Pin TSOT-23 T/R	Conv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 5.5V 0.3A 6-Pin TSOT-23 T/R
EU restricts the use of certain hazardous substances	Not Compliant	Not Compliant	Compliant	Compliant
ECCN (US)	EAR99	EAR99	EAR99	EAR99
Part Status	Unconfirmed	LTB	Active	Active
Type	Synchronous Step Down	Synchronous Step Down	Synchronous Step Down	Synchronous Step Down
Output Type	Adjustable	Adjustable	Adjustable	Adjustable
Switching Frequency (kHz)	1800	1800	1800	1800
Switching Regulator	Yes	Yes	Yes	Yes
Number of Outputs	1	1	1	1
Output Voltage (V)	0.8 to 5.5	0.8 to 5.5	0.8 to 5.5	0.8 to 5.5
Maximum Output Current (A)	0.3	0.3	0.3	0.3
Minimum Input Voltage (V)	2.5	2.5	2.5	2.5
Maximum Input Voltage (V)	5.5	5.5	5.5	5.5
Operating Supply Voltage (V)	2.5 to 5.5	2.5 to 5.5	2.5 to 5.5	2.5 to 5.5
Typical Quiescent Current (uA)	20	20	20	20
Line Regulation	0.4%/V	0.4%/V	0.4%/V	0.4%/V
Load Regulation	0.5%(Typ)	0.5%(Typ)	0.5%(Typ)	0.5%(Typ)
Efficiency (%)	96	96	96	96
Minimum Operating Temperature (°C)	-40	-40	-40	-40
Maximum Operating Temperature (°C)	85	85	85	85
Supplier Temperature Grade	Extended	Extended	Extended	Extended
Pin Count	6	6	6	6
Standard Package Name	SOT-23	SOT-23	SOT	SOT
Supplier Package	TSOT-23	TSOT-23	TSOT-23	TSOT-23
Mounting	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package Height	0.9(Max)	0.9(Max)	0.9(Max)	0.9(Max)
Package Length	2.9	2.9	2.9	2.9
Package Width	1.75(Max)	1.75(Max)	1.75(Max)	1.75(Max)
PCB changed	6	6	6	6
Lead Shape	Gull-wing	Gull-wing	Gull-wing	Gull-wing
Packaging	-	Tape and Reel	Tape and Reel	Tape and Reel

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