LTC1775 - High Power No R_SENSE™ Current Mode Synchronous Step-Down Switching Regulator

LTC1775 - High Power No R_SENSE™ Current Mode Synchronous Step-Down Switching Regulator - Linear Technology（凌力尔特）

The LTC1775 is a synchronous step-down switching regulator controller that drives external N-channel power MOSFETs using few external components. Current mode control with MOSFET VDS sensing eliminates the need for a sense resistor and improves efficiency. Largely similar to the LTC1625, the LTC1775 has twice the maximum sense voltage for high current applications. The frequency of a nominal 150kHz internal oscillator can be synchronized to an external clock over a 1.5:1 frequency range. Burst Mode™ operation at low load currents reduces switching losses and low dropout operation extends operating time in battery-powered systems. A forced continuous mode control pin can assist secondary winding regulation by disabling Burst Mode operation when the main output is lightly loaded. Fault protection is provided by foldback current limiting and an output overvoltage comparator. An external capacitor attached to the RUN/SS pin provides soft start capability for supply sequencing. A wide supply range allows operation from 4V (4.3V for LTC1775I) to 36V at the input and 1.19V to VIN at the output.

Highest Efficiency Current Mode Controller

No Sense Resistor Required

300mV Maximum Current Sense Voltage

Stable High Current Operation

Dual N-Channel MOSFET Synchronous Drive

Wide VIN Range: 4V to 36V

Wide VOUT Range: 1.19V to VIN

±1% 1.19V Reference

Programmable Fixed Frequency with Injection Lock

Very Low Drop Out Operation: 99% Duty Cycle

Forced Continuous Mode Control Pin

Optional Programmable Soft Start

Pin Selectable Output Voltage

Foldback Current Limit

Output Overvoltage Protection

Logic Controlled Micropower Shutdown: IQ< 30µA

Available in 16-Lead Narrow SSOP and SO Packages

Notebook Computers

Automotive Electronics

Battery Chargers

Distributed Power Systems

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)
LTC1775CGN	SSOP-16	C	$5.90	$5.00
LTC1775CGN#PBF	SSOP-16	C	$5.90	$5.00
LTC1775CGN#TR	SSOP-16	C		$5.06
LTC1775CGN#TRPBF	SSOP-16	C		$5.06
LTC1775CS	SO-16	C	$5.55	$4.65
LTC1775CS#PBF	SO-16	C	$5.55	$4.65
LTC1775CS#TR	SO-16	C		$4.71
LTC1775CS#TRPBF	SO-16	C		$4.71
LTC1775IGN	SSOP-16	I	$7.35	$6.00
LTC1775IGN#PBF	SSOP-16	I	$7.35	$6.00
LTC1775IGN#TR	SSOP-16	I		$6.06
LTC1775IGN#TRPBF	SSOP-16	I		$6.06
LTC1775IS	SO-16	I	$6.85	$5.60
LTC1775IS#PBF	SO-16	I	$6.85	$5.60
LTC1775IS#TR	SO-16	I		$5.66
LTC1775IS#TRPBF	SO-16	I		$5.66

LTC1624 - High Efficiency SO-8 N-Channel Switching Regulator Controller

LTC3703 - 100V 同步开关稳压控制器

LTC1625 - No R_SENSE^TM Current Mode Synchronous Step-Down Switching Regulator

LTC3810 - 100V 电流模式同步开关稳压控制器

LTC3864 - 具 100% 占空比能力的 60V、低 I_Q、降压型 DC/DC 控制器

LT3800 - 高电压同步电流模式降压型控制器

LTC3878 - 快速、宽工作范围、No Rsense、降压型控制器

LT3844 - 具可设置工作频率的高电压、电流模式开关稳压控制器

LTC3891 - 低 Iq、60V、同步降压型控制器

LT3741 / LT3741-1 - 高功率、恒定电流、恒定电压、降压型控制器

• LTC4274C - LTC4274C是单通道 PoE / PoE+ / LTPoE++ PSE 控制器
• LTC2142-14 - LTC2142-14是14 位、65Msps、低功率、双通道 ADC
• LTC2292 - LTC2292是Dual 12-Bit, 40Msps Low Power 3V ADC
• LTC1596A - LTC1596A是串行 16 位乘法 DAC
• LTC1871 - LTC1871是宽输入范围、No R_SENSE? 电流模式升压、反激和 SEPIC 控制器
• LTC2640-8 - LTC2640-8是具 10ppm/oC 基准的单通道 12 / 10 / 8 位 SPI Vout DAC
• LTC1514 - LTC1514是Step-Up/Step-Down Switched Capacitor DC/DC Converters with Low-Battery Comparator
• LTC2051HV - LTC2051HV是双路零漂移运算放大器
• LT3081 - LT3081是具监视器的 1.5A 单电阻器坚固型线性稳压器
• LT6003 - LT6003是1.6V、1μA 精准轨至轨输入和输出运放