MAX1675：高效率、低电源电流、紧凑的、升压型DC-DC转换器

紧凑的低成本、低噪声设计：电感阻尼开关可有效降低纹波，改善EMI抑制

The MAX1674/MAX1675/MAX1676 compact, high-efficiency, step-up DC-DC converters fit in small µMAX packages. They feature a built-in synchronous rectifier, which improves efficiency and reduces size and cost by eliminating the need for an external Schottky diode. Quiescent supply current is only 16µA. The input voltage ranges from 0.7V to VOUT, where VOUT can be set from 2V to 5.5V. Start-up is guaranteed from 1.1V inputs. The MAX1674/MAX1675/MAX1676 have a preset, pin-selectable output for 5V or 3.3V. The outputs can also be adjusted to other voltages using two external resistors. All three devices have a 0.3Ω N-channel MOSFET power switch. The MAX1674 has a 1A current limit. The MAX1675 has a 0.5A current limit, which permits the use of a smaller inductor. The MAX1676 comes in a 10-pin µMAX package and features an adjustable current limit and circuitry to reduce inductor ringing.

关键特性

94% Efficient at 200mA Output Current
16µA Quiescent Supply Current
Internal Synchronous Rectifier (no external diode)
0.1µA Logic-Controlled Shutdown
LBI/LBO Low-Battery Detector
Selectable Current Limit for Reduced Ripple
Low-Noise, Anti-Ringing Feature (MAX1676)
8-Pin and 10-Pin µMAX Packages
Preassembled Evaluation Kit (MAX1676EVKIT)

MAX1674、MAX1675、MAX1676：典型工作电路

应用

1节至3节电池供电的手持设备
手持式计算机
医疗设备
寻呼机
PDA
射频标记
无线电话

数据手册DataSheet

语言	下载文件	备注
英文	MAX1674-MAX1676.pdf	Rev 3; 03/2000

关键参数

Part Number	V_IN (V)	V_IN (V)	V_OUT1 (V)	V_OUT1 (V)	Preset V_OUT (V)	I_OUT1 (A)	Output Adjust. Method	Switch Type	Power Good Signal	Synchronous Switching	I_CC (mA)	Shutdown Mode Supply Current (µA)	Shutdown Mode Supply Current (µA)	DC-DC Outputs	Package/Pins	Budgetary Price
Part Number	min	max	min	max	Preset V_OUT (V)	max	Output Adjust. Method	Switch Type	Power Good Signal	Synchronous Switching	typ	typ	max	DC-DC Outputs	Package/Pins	See Notes
MAX1674	0.7	5.5	2	5.5	3.3 5	0.3	Preset Resistor	Internal	Yes	Yes	0.016	0.1	1	1	µMAX/8	$1.85 @1k
MAX1675															µMAX/8	$2.17 @1k
MAX1676															µMAX/10	$1.99 @1k

订购型号

型号	状况	推荐替代产品	封装	温度	RoHS/无铅
MAX1675EUA	停止供货	MAX1675EUA+	µMAX,；8引脚；15.6mm²	-40°C至+85°C	RoHS/无铅：否
MAX1675EUA+	生产中		µMAX,；8引脚；15.6mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1675EUA+T	生产中		µMAX,；8引脚；15.6mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1675EUA-T	停止供货	MAX1675EUA+T	µMAX,；8引脚；15.6mm²	-40°C至+85°C	RoHS/无铅：否