LTC3405A-1.5 1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT

The LTC®3405A-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

产品特点 Features

High Efficiency: Up to 90%
Very Low Quiescent Current: Only 20µA During Operation
300mA Output Current at VIN = 3V
2.5V to 5.5V Input Voltage Range
1.5MHz Constant Frequency Operation
No Schottky Diode Required
Low Dropout Operation: 100% Duty Cycle
Stable with Ceramic Capacitors
Shutdown Mode Draws <1µA Supply Current
±3% Output Voltage Accuracy
Current Mode Operation for Excellent Line and Load Transient Response
Overtemperature Protected
Low Profile (1mm) ThinSOTTM Package

参数

应用

Cellular Telephones
Personal Information Appliances
Wireless and DSL Modems
Digital Still Cameras
MP3 Players
Portable Instruments

典型应用图

LTC3405A-1.5 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC3405AES6	SOT	6	E	$2.37
LTC3405AES6#PBF	SOT	6	E	$2.37
LTC3405AES6#TR	SOT	6	E	$2.37	$1.67
LTC3405AES6#TRM	SOT	6	E	$2.37	$1.69
LTC3405AES6#TRMPBF	SOT	6	E	$2.37	$1.69
LTC3405AES6#TRPBF	SOT	6	E	$2.37	$1.67
LTC3405AES6-1.375	SOT	6	E	$2.37
LTC3405AES6-1.375#PBF	SOT	6	E	$2.37
LTC3405AES6-1.375#TR	SOT	6	E	$2.37	$1.67
LTC3405AES6-1.375#TRM	SOT	6	E	$2.37	$1.69
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	SOT	6	E	$2.37
LTC3405AES6-1.5#PBF	SOT	6	E	$2.37
LTC3405AES6-1.5#TR	SOT	6	E	$2.37	$1.67
LTC3405AES6-1.5#TRM	SOT	6	E	$2.37	$1.69
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	SOT	6	E	$2.37
LTC3405AES6-1.8#PBF	SOT	6	E	$2.37
LTC3405AES6-1.8#TR	SOT	6	E	$2.37	$1.67
LTC3405AES6-1.8#TRM	SOT	6	E	$2.37	$1.69
LTC3405AES6-1.8#TRMPBF	SOT	6	E	$2.37	$1.69
LTC3405AES6-1.8#TRPBF	SOT	6	E	$2.37	$1.67
LTC3405ES6	SOT	6	E	$1.96
LTC3405ES6#PBF	SOT	6	E	$1.96
LTC3405ES6#TR	SOT	6	E	$1.96	$1.67
LTC3405ES6#TRM	SOT	6	E	$1.96	$1.69
LTC3405ES6#TRMPBF	SOT	6	E	$1.96	$1.69
LTC3405ES6#TRPBF	SOT	6	E	$1.96	$1.67

LTC3405A-1.5 数据手册及相关资料下载

数据手册(英文) : LTC3405A-1.5/LTC3405A-1.8 - 1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT.PDF
设计要点 (英文) : DN256 - 1.4MHz Switching Regulator Draws Only 10µA Supply Current.PDF
可靠性数据 : R415 Reliability Data .PDF