MAX1714A, MAX1714B：高速、降压型控制器，用于笔记本电脑

低成本、具有快速响应特性、精度为1%的电源控制器，用于下一代笔记本CPU核以及I/O供电

The MAX1714 pulse-width modulation (PWM) controller provides the high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high-voltage batteries to generate low-voltage CPU core or chip-set/RAM supplies in notebook computers. Maxim's proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns "instant-on" response to load transients while maintaining a relatively constant switching frequency. The MAX1714 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by an ability to drive very large synchronous-rectifier MOSFETs. Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping down the +5V system supply instead of the battery) at a higher switching frequency allows the minimum possible physical size. The MAX1714 is intended for CPU core, chipset, DRAM, or other low-voltage supplies as low as 1V. The MAX1714A is available in a 20-pin QSOP package and includes overvoltage protection. The MAX1714B is available in a 16-pin QSOP package with no overvoltage protection. For applications requiring VID compliance or DAC control of output voltage, refer to the MAX1710/MAX1711 data sheet. For a dual output version, refer to the MAX1715 data sheet.

关键特性

Ultra-High Efficiency
No Current-Sense Resistor (Lossless ILIMIT)
Quick-PWM with 100ns Load-Step Response
1% VOUT Accuracy Over Line and Load
2.5V/3.3V Fixed or 1V to 5.5V Adjustable Output Range
2V to 28V Battery Input Range
200/300/450/600kHz Switching Frequency
Overvoltage Protection (MAX1714A)
Undervoltage Protection
1.7ms Digital Soft-Start
Drives Large Synchronous-Rectifier FETs
2V ±1% Reference Output
Power-Good Indicator

MAX1714、MAX1714A、MAX1714B：最简工作电路

应用

1.8V与2.5V I/O电源
芯片组/RAM供电，电压可低至1V
CPU核电源
笔记本电脑

数据手册DataSheet

语言	下载文件	备注
英文	MAX1714-MAX1714B.pdf	Rev 2; 09/2005

关键参数

Part Number	V_IN (V)	V_IN (V)	V_OUT1 (V)	V_OUT1 (V)	Preset V_OUT (V)	Output Adjust. Method	I_OUT1 (A)	Switch Type	Synchronous Switching	DC-DC Outputs	Oper. Freq. (kHz)	Package/Pins	Budgetary Price
Part Number	min	max	min	max	Preset V_OUT (V)	Output Adjust. Method	max	Switch Type	Synchronous Switching	DC-DC Outputs	Oper. Freq. (kHz)	Package/Pins	See Notes
MAX1714A	2	28	1	5.5	2.5 3.3	Preset Resistor	8	External	Yes	1	600	QSOP/16 QSOP/20	$3.06 @1k
MAX1714B	2	28	1	5.5	2.5 3.3	Preset Resistor	8	External	Yes	1	600	QSOP/16 QSOP/20	$3.06 @1k

开发工具

质量和环境数据

MAX1714A.pdf

订购型号

型号	状况	推荐替代产品	封装	温度	RoHS/无铅
MAX1714AEEP	停止供货	MAX1714AEEP+	QSOP,；20引脚；54.2mm²	-40°C至+85°C	RoHS/无铅：否
MAX1714AEEP+	生产中		QSOP,；20引脚；54.2mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1714AEEP+T	生产中		QSOP,；20引脚；54.2mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1714AEEP-T	停止供货	MAX1714AEEP+T	QSOP,；20引脚；54.2mm²	-40°C至+85°C	RoHS/无铅：否