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双路、高效率、PFM、升压型DC-DC控制器

尺寸最小的双输出升压转换器,用于逻辑电路及LCD或闪存供电,1.5V输入

产品详情

主要特征

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 1.5
VIN (V) (max) 11
VOUT1 (V) (min) 1.25
VOUT1 (V) (max) 100
IOUT1 (A) (max) 2
Switch Type External
Output Adjust. Method Resistor
Power Good Signal Yes
ICC (mA) (typ) 0.05
Shutdown Mode Supply Current (µA) (typ) 1
# DC-DC Outputs 2
Package/Pins QSOP/16
Budgetary
Price (See Notes)
3.47
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参量

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 1.5
VIN (V) (max) 11
VOUT1 (V) (min) 1.25
VOUT1 (V) (max) 100
IOUT1 (A) (max) 2
Switch Type External
Output Adjust. Method Resistor
Power Good Signal Yes
ICC (mA) (typ) 0.05
Shutdown Mode Supply Current (µA) (typ) 1
# DC-DC Outputs 2
Package/Pins QSOP/16
Budgetary
Price (See Notes)
3.47

主要特征

  • Smallest Dual Step-Up Converter: 16-Pin QSOP
  • 90% Efficiency
  • 1.5V Start-Up Voltage
  • 85µA Max Total Quiescent Supply Current
  • 1µA Shutdown Mode
  • Independent Shutdown Inputs
  • Drives Surface-Mount, Dual N-Channel MOSFETs
  • Low-Battery Input/Output Comparator
  • Step-Up/Down Configurable

应用/用途

  • 2节及3节电池供电的便携式设备
  • 双电源(逻辑与LCD)
  • 手持式仪表(PDA、掌上电脑)
  • 数字助理
  • 掌上电脑
  • PDA及其它手持设备
  • 转换器

描述

The MAX863 dual-output DC-DC converter contains two independent step-up controllers in a single compact package. This monolithic Bi-CMOS design draws only 85µA when both controllers are on. The input range extends down to 1.5V, permitting use in organizers, translators, and other low-power hand-held products. The MAX863 provides 90% efficiency at output loads from 20mA to over 1A. This space-saving device is supplied in a 16-pin QSOP package that fits in the same area as an 8-pin SOIC.

The device uses a current-limited, pulse-frequency-modulated (PFM) control architecture that reduces start-up surge currents and maintains low quiescent currents for excellent low-current efficiency. Each controller drives a low-cost, external, N-channel MOSFET switch, whose size can be optimized for any output current or voltage.

In larger systems, two MAX863s can be used to generate 5V, 3.3V, 12V, and 28V from just two or three battery cells. An evaluation kit (MAX863EVKIT) is available to speed designs. For a single-output controller, refer to the MAX608 and MAX1771 data sheets.

简化框图

MAX863:典型工作电路 MAX863:典型工作电路 Zoom icon

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心