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5V/3.3V或可调、低压差、低IQ、500mA线性稳压器

业内尺寸最小的500mA LDO,SO8封装可耗散1.8W的功率

产品详情

主要特征

Parametric specs for Linear Regulators
VIN (V) (min) 2.7
VIN (V) (max) 11.5
Adj. VOUT (V) (min) 1.3
Adj. VOUT (V) (max) 11.5
Rated ILOAD (mA) 500
Preset VOUT (V) 3.3
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.6
ICC (µA) (max) 35
Low Batt./ Pwr. Fail Out No
Watchdog No
Reverse Batt. Protect. No
Oper. Temp. (°C) -40 to +85
0 to +70
Package/Pins PDIP/8
SOIC (N)/8
Budgetary
Price (See Notes)
2.07
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参量

Parametric specs for Linear Regulators
VIN (V) (min) 2.7
VIN (V) (max) 11.5
Adj. VOUT (V) (min) 1.3
Adj. VOUT (V) (max) 11.5
Rated ILOAD (mA) 500
Preset VOUT (V) 3.3
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.6
ICC (µA) (max) 35
Low Batt./ Pwr. Fail Out No
Watchdog No
Reverse Batt. Protect. No
Oper. Temp. (°C) -40 to +85
0 to +70
Package/Pins PDIP/8
SOIC (N)/8
Budgetary
Price (See Notes)
2.07

主要特征

  • 500mA Output Current, with Foldback Current Limiting
  • High-Power (1.8W) 8-Pin SO Package
  • Dual Mode™ Operation: Fixed or Adjustable Output from 1.25V to 11V
  • Large Input Range (2.7V to 11.5V)
  • Internal 500mA P-Channel Pass Transistor
  • 15µA Typical Quiescent Current
  • 2µA (Max) Shutdown Mode
  • Thermal Overload Protection
  • Reverse-Current Protection

应用/用途

  • 1.25V至11V可调节的稳压器
  • 5V和3.3V稳压器
  • 汽车电子
  • 寻呼机及蜂窝电话
  • 便携式仪表
  • 太阳能供电仪表

描述

The MAX603/MAX604 low-dropout, low quiescent current, linear regulators supply 5V, 3.3V, or an adjustable output for currents up to 500mA. They are available in a 1.8W SO package. Typical dropouts are 320mV at 5V and 500mA, or 240mV at 3.3V and 200mA. Quiescent currents are 15µA typ and 35µA max. Shutdown turns off all circuitry and puts the regulator in a 2µA off mode. A unique protection scheme limits reverse currents when the input voltage falls below the output. Other features include foldback current limiting and thermal overload protection.

The output is preset at 3.3V for the MAX604 and 5V for the MAX603. In addition, both devices employ Dual Mode™ operation, allowing user-adjustable outputs from 1.25V to 11V using external resistors. The input voltage supply range is 2.7V to 11.5V.

The MAX603/MAX604 feature a 500mA P-channel MOSFET pass transistor. This transistor allows the devices to draw less than 35µA over temperature, independent of the output current. The supply current remains low because the P-channel MOSFET pass transistor draws no base currents (unlike the PNP transistors of conventional bipolar linear regulators). Also, when the input-to-output voltage differential becomes small, the internal P-channel MOSFET does not suffer from excessive base current losses that occur with saturated PNP transistors.

简化框图

MAX603、MAX604:典型工作电路 MAX603、MAX604:典型工作电路 Zoom icon

Technical Docs

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在Maxim的知识库中搜索技术问题的答案

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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