LT1946 - 1.2MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start

The LT®1946 is a fixed frequency step-up DC/DC converter containing an internal 1.5A, 36V switch. Capable of generating 8V at 430mA from a 3.3V input, the LT1946 is ideal for large TFT-LCD panel power supplies. The LT1946 switches at 1.2MHz, allowing the use of tiny, low profile inductors and low value ceramic capacitors. Loop compensation can be either internal or external, giving the user flexibility in setting loop compensation and allowing optimized transient response with low ESR ceramic output capacitors. Soft-start is controlled with an external capacitor, which determines the input current ramp rate during start-up.

The 8-lead MSOP package and high switching frequency ensure a low profile overall solution less than 1.2mm high.

特点

1.5A, 36V Internal Switch
1.2MHz Switching Frequency
Integrated Soft-Start Function
Output Voltage Up to 34V
Low VCESAT Switch: 300mV at 1.5A (Typ)
8V at 430mA from a 3.3V Input
Small 8-Lead MSOP Package

典型应用

应用

TFT-LCD Bias Supplies
GPS Receivers
DSL Modems
Local Power Supplies

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) *
LT1946EMS8#PBF	MS-8	E	$2.08	$1.75
LT1946EMS8#TRPBF	MS-8	E		$1.81
LT1946EMS8E#PBF	MS-8	E	$2.14	$1.80
LT1946EMS8E#TRPBF	MS-8	E		$1.86

演示电路板


器件型号	描述	价格
DC459A	LT1946EMS8 LT1946AEMS8E \| 12Vout Boost Converter, +5Vin, +12Vout/400mA and Triple Output TFT LCD Bias Supply, 3.3Vin, Vout=+23V/5mA, +8V/350mA, -8V/10mA	联系凌力尔特