LTC3405A-1.8 - 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT
Datasheet Documentation
Datasheet
Design Note
Reliability Data
cad_symbol
LTpowerCAD
Overview

Features

Typical Application

LTC3405A-1.8 Typical Application
LTC3405A-1.8 Typical Application

Description

The LTC3405A-1.5/LTC3405A-1.8 are high efficiency monolithic synchronous buck regulators 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 LTC3405A-1.5/LTC3405A-1.8 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 LTC3405A-1.5/LTC3405A-1.8 are specifically designed to work well with ceramic output capacitors, achieving very low output voltage ripple and a small PCB footprint.

The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. The LTC3405A-1.5/LTC3405A-1.8 are available in a low profile (1mm) ThinSOT package.

For adjustable output voltage, refer to the LTC3405A data sheet.

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

  Vout Features
LTC3405 Adj. -
LTC3405A Adj. Stable With All Ceramic Caps
LTC3405A-1.375 1.375V Stable With All Ceramic Caps
LTC3405A-1.5 1.5V Stable With All Ceramic Caps
LTC3405A-1.8 1.8V Stable With All Ceramic Caps
Packaging

SOT-23

LTC3405A-1.8 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
(1-99)		 Price
(1k)*
LTC3405AES6#PBF SOT 6 E $2.37
LTC3405AES6#TRMPBF SOT 6 E $2.37 $1.69
LTC3405AES6#TRPBF SOT 6 E $2.37 $1.67
LTC3405AES6-1.375#PBF SOT 6 E $2.37
LTC3405AES6-1.375#TRMPBF SOT 6 E $2.37 $1.69
LTC3405AES6-1.375#TRPBF SOT 6 E $2.37 $1.67
LTC3405AES6-1.5#PBF SOT 6 E $2.37
LTC3405AES6-1.5#TRMPBF SOT 6 E $2.37 $1.69
LTC3405AES6-1.5#TRPBF SOT 6 E $2.37 $1.67
LTC3405AES6-1.8#PBF SOT 6 E $2.37
LTC3405AES6-1.8#TRMPBF SOT 6 E $2.37 $1.69
LTC3405AES6-1.8#TRPBF SOT 6 E $2.37 $1.67
LTC3405ES6#PBF SOT 6 E $1.96
LTC3405ES6#TRMPBF SOT 6 E $1.96 $1.69
LTC3405ES6#TRPBF SOT 6 E $1.96 $1.67
LTC3405ES6#TR SOT 6 E $3.92 $3.34
LTC3405ES6 SOT 6 E $3.92
LTC3405AES6 SOT 6 E $4.74
LTC3405AES6#TR SOT 6 E $4.74 $3.34
LTC3405AES6-1.5 SOT 6 E $4.74
LTC3405AES6-1.5#TR SOT 6 E $4.74 $3.34
LTC3405AES6-1.8 SOT 6 E $4.74
LTC3405AES6-1.8#TR SOT 6 E $4.74 $3.34
LTC3405AES6-1.375 SOT 6 E $4.74
LTC3405AES6-1.375#TR SOT 6 E $4.74 $3.34
LTC3405AES6#TRM SOT 6 E $4.74 $3.38
LTC3405AES6-1.375#TRM SOT 6 E $4.74 $3.38
LTC3405AES6-1.5#TRM SOT 6 E $4.74 $3.38
LTC3405AES6-1.8#TRM SOT 6 E $4.74 $3.38
LTC3405ES6#TRM SOT 6 E $3.92 $3.38
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.


Part Number Description Price Documentation
DC480A-C LTC3405AES6-1.8 | Thin SOT Synchronous Buck Regulator, 2.5 to 5.5 Vin, 1.8Vout 300mA(3.0 Vin min), (Small size Inductor) $75.00
DC480A-D LTC3405AES6-1.8 | Thin SOT Synchronous Buck Regulator, 2.5 to 5.5 Vin, 1.8Vout 300mA(3.0 Vin min), (High Efficiency Inductor) $75.00