LTC3830-1 High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation

The LTC®3830/LTC3830-1 are high power, high efficiency switching regulator controllers optimized for 3.3V-5V to 1.xV-3.xV step-down applications. A precision internal reference and feedback system provide ±1% output regulation over temperature, load current and line voltage variations. The LTC3830/LTC3830-1 use a synchronous switching architecture with N-channel MOSFETs. Additionally, the chip senses output current through the drain-source resistance of the upper N-channel FET, providing an adjustable current limit without a current sense resistor.

The LTC3830/LTC3830-1 operate with an input supply voltage as low as 3V and with a maximum duty cycle of >91% over temperature. They include a fixed frequency PWM oscillator for low output ripple operation. The 200kHz free-running clock frequency can be externally adjusted or synchronized with an external signal from 100kHz to 500kHz. In shutdown mode, the LTC3830 supply current drops to <10µA. The LTC3830-1 differs from the LTC3830 S8 version by replacing shutdown with a soft-start function.

For a similar, pin compatible DC/DC converter with an output voltage as low as 0.6V, please refer to the LTC3832.

产品特点 Features

High Power Switching Regulator Controller for 3.3V-5V to 1.xV-3.xV Step-Down Applications
No Current Sense Resistor Required
Low Input Supply Voltage Range: 3V to 8V
Maximum Duty Cycle >91% Over Temperature
All N-Channel External MOSFETs
Excellent Output Regulation: ±1% Over Line, Load and Temperature Variations
High Efficiency: Over 95% Possible
Adjustable or Fixed 3.3V Output (16-Pin Version)
Programmable Fixed Frequency Operation: 100kHz to 500kHz
External Clock Synchronization
Soft-Start (Some Versions)
Low Shutdown Current: <10µA
Overtemperature Protection
Available in S8, S16 and SSOP-16 Packages

应用

CPU Power Supplies
Multiple Logic Supply Generator
Distributed Power Applications
High Efficiency Power Conversion

典型应用图

参数

LTC3830-1 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) *
LTC3830-1ES8	SO	8	E	$3.61	$3.05
LTC3830-1ES8#PBF	SO	8	E	$3.61	$3.05
LTC3830-1ES8#TR	SO	8	E		$3.11
LTC3830-1ES8#TRPBF	SO	8	E		$3.11
LTC3830EGN	SSOP	16	E	$4.50	$3.80
LTC3830EGN#PBF	SSOP	16	E	$4.50	$3.80
LTC3830EGN#TR	SSOP	16	E		$3.86
LTC3830EGN#TRPBF	SSOP	16	E		$3.86
LTC3830ES	SO	16	E	$4.14	$3.50
LTC3830ES#PBF	SO	16	E	$4.14	$3.50
LTC3830ES#TR	SO	16	E		$3.56
LTC3830ES#TRPBF	SO	16	E		$3.56
LTC3830ES8	SO	8	E	$3.61	$3.05
LTC3830ES8#PBF	SO	8	E	$3.61	$3.05
LTC3830ES8#TR	SO	8	E		$3.11
LTC3830ES8#TRPBF	SO	8	E		$3.11

LTC3830-1 数据手册及相关资料下载

数据手册(英文) : LTC3830/LTC3830-1 - High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation.PDF
可靠性数据 : R320 Reliability Data .PDF