LTC3405A-1.8 - 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.

特点

High Efficiency: Up to 93%
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) ThinSOT™ Package

典型应用

应用

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

封装信息

**Order Information 订购型号**
器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC3405AES6-1.8#PBF	SOT-23	E	$2.37
LTC3405AES6-1.8#TRMPBF	SOT-23	E	$2.37	$1.69
LTC3405AES6-1.8#TRPBF	SOT-23	E	$2.37	$1.67

演示电路板


器件型号	描述	价格
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