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简单的SOT23封装boost控制器

产品详情

The MAX1522/MAX1523/MAX1524 are simple, compact boost controllers designed for a wide range of DC-DC conversion topologies, including step-up, SEPIC, and flyback applications. They are for applications where extremely low cost and small size are top priorities. These devices are designed specifically to provide a simple application circuit and minimize the size and number of external components, making them ideal for PDAs, digital cameras, and other low-cost consumer electronics applications.

These devices use a unique fixed on-time, minimum off-time architecture, which provides excellent efficiency over a wide-range of input/output voltage combinations and load currents. The fixed on-time is pin selectable to either 0.5µs (50% max duty cycle) or 3µs (85% max duty cycle), permitting optimization of external component size and ease of design for a wide range of output voltages.

The MAX1522/MAX1523 operate from a +2.5V to +5.5V input voltage range and are capable of generating a wide range of outputs. The MAX1524 is intended for bootstrapped operation, permitting startup with lower input voltage. All devices have internal soft-start and short-circuit protection to prevent excessive switching current during startup and under output fault conditions. The MAX1522/MAX1524 have a latched fault mode, which shuts down the controller when a short-circuit event occurs, whereas the MAX1523 reenters soft-start mode during output fault conditions. The MAX1522/MAX1523/MAX1524 are available in a space-saving 6-pin SOT23 package.

主要特征

  • Simple, Flexible Application Circuit
  • 2-Cell NiMH or Alkaline Operation (MAX1524)
  • Low Quiescent Current (25µA typ)
  • Output Fault Protection and Soft-Start
  • High Efficiency Over 1000:1 IOUT Range
  • Pin-Selectable Maximum Duty Factor
  • Micropower Shutdown Mode
  • Small 6-Pin SOT23 Package
  • No Current-Sense Resistor

应用/用途

  • 工业+24V和+28V供电电源
  • LCD偏置电源
  • 低成本电池供电应用
  • 低成本、大电流或高电压升压转换器
  • 低成本、多输出反激式转换器
  • SEPIC转换器
Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 2.5
VIN (V) (max) 5.5
VOUT1 (V) (min) 2.5
VOUT1 (V) (max) 100
IOUT1 (A) (max) 1
Switch Type External
Output Adjust. Method Resistor
ICC (mA) (typ) 0.025
Shutdown Mode Supply Current (µA) (typ) 0.001
Shutdown Mode Supply Current (µA) (max) 1
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Package/Pins SOT23/6
Budgetary
Price (See Notes)
$1.12 @1k
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简化框图

MAX1522、MAX1523、MAX1524:典型工作电路 MAX1522、MAX1523、MAX1524:典型工作电路 Zoom icon

技术文档

设计与质量

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描述

MAX1522评估板(EV kit)是一块配备齐全且经过测试的表贴器件电路板,包含两个独立的升压开关控制电路。第一块电路(左侧)使用MAX1524,被配置为+5V输出电压、并可以提供最大1A的电流。MAX1524电源引脚被自举至输出。第二块电路(右侧)使用MAX1522,被配置为+12V输出电压,并可提供最大200mA的电流,输入电压最低可低至+2.7V。

MAX1522和MAX1524具有软启动和故障检测功能。评估板允许用户将N沟道MOSFET的导通时间设置为0.5µs或3µs。

查看详情

特征

  • 输入电压
    • +1.5V至+5.5V (左侧,自举)
    • +2.5V至+5.5V (右侧,非自举)
  • 输出电压
    • +5V, 最大输出电流1A (左侧)
    • +12V, 最大输出电流200mA (右侧)
  • 无需检流电阻
  • 故障检测
  • 软启动限制浪涌电流
  • 可选择最大占空比(45%或80%)
  • 可调输出电压
  • 1µA (最大)关断电流
  • 开关频率最高至1MHz
  • 配备齐全且经过测试

描述

MAX1522评估板(EV kit)是一块配备齐全且经过测试的表贴器件电路板,包含两个独立的升压开关控制电路。第一块电路(左侧)使用MAX1524,被配置为+5V输出电压、并可以提供最大1A的电流。MAX1524电源引脚被自举至输出。第二块电路(右侧)使用MAX1522,被配置为+12V输出电压,并可提供最大200mA的电流,输入电压最低可低至+2.7V。

MAX1522和MAX1524具有软启动和故障检测功能。评估板允许用户将N沟道MOSFET的导通时间设置为0.5µs或3µs。

查看详情

特征

  • 输入电压
    • +1.5V至+5.5V (左侧,自举)
    • +2.5V至+5.5V (右侧,非自举)
  • 输出电压
    • +5V, 最大输出电流1A (左侧)
    • +12V, 最大输出电流200mA (右侧)
  • 无需检流电阻
  • 故障检测
  • 软启动限制浪涌电流
  • 可选择最大占空比(45%或80%)
  • 可调输出电压
  • 1µA (最大)关断电流
  • 开关频率最高至1MHz
  • 配备齐全且经过测试

描述

MAX1522评估板(EV kit)是一块配备齐全且经过测试的表贴器件电路板,包含两个独立的升压开关控制电路。第一块电路(左侧)使用MAX1524,被配置为+5V输出电压、并可以提供最大1A的电流。MAX1524电源引脚被自举至输出。第二块电路(右侧)使用MAX1522,被配置为+12V输出电压,并可提供最大200mA的电流,输入电压最低可低至+2.7V。

MAX1522和MAX1524具有软启动和故障检测功能。评估板允许用户将N沟道MOSFET的导通时间设置为0.5µs或3µs。

查看详情

特征

  • 输入电压
    • +1.5V至+5.5V (左侧,自举)
    • +2.5V至+5.5V (右侧,非自举)
  • 输出电压
    • +5V, 最大输出电流1A (左侧)
    • +12V, 最大输出电流200mA (右侧)
  • 无需检流电阻
  • 故障检测
  • 软启动限制浪涌电流
  • 可选择最大占空比(45%或80%)
  • 可调输出电压
  • 1µA (最大)关断电流
  • 开关频率最高至1MHz
  • 配备齐全且经过测试

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参量

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 2.5
VIN (V) (max) 5.5
VOUT1 (V) (min) 2.5
VOUT1 (V) (max) 100
IOUT1 (A) (max) 1
Switch Type External
Output Adjust. Method Resistor
ICC (mA) (typ) 0.025
Shutdown Mode Supply Current (µA) (typ) 0.001
Shutdown Mode Supply Current (µA) (max) 1
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Package/Pins SOT23/6
Budgetary
Price (See Notes)
$1.12 @1k

主要特征

  • Simple, Flexible Application Circuit
  • 2-Cell NiMH or Alkaline Operation (MAX1524)
  • Low Quiescent Current (25µA typ)
  • Output Fault Protection and Soft-Start
  • High Efficiency Over 1000:1 IOUT Range
  • Pin-Selectable Maximum Duty Factor
  • Micropower Shutdown Mode
  • Small 6-Pin SOT23 Package
  • No Current-Sense Resistor

应用/用途

  • 工业+24V和+28V供电电源
  • LCD偏置电源
  • 低成本电池供电应用
  • 低成本、大电流或高电压升压转换器
  • 低成本、多输出反激式转换器
  • SEPIC转换器

描述

The MAX1522/MAX1523/MAX1524 are simple, compact boost controllers designed for a wide range of DC-DC conversion topologies, including step-up, SEPIC, and flyback applications. They are for applications where extremely low cost and small size are top priorities. These devices are designed specifically to provide a simple application circuit and minimize the size and number of external components, making them ideal for PDAs, digital cameras, and other low-cost consumer electronics applications.

These devices use a unique fixed on-time, minimum off-time architecture, which provides excellent efficiency over a wide-range of input/output voltage combinations and load currents. The fixed on-time is pin selectable to either 0.5µs (50% max duty cycle) or 3µs (85% max duty cycle), permitting optimization of external component size and ease of design for a wide range of output voltages.

The MAX1522/MAX1523 operate from a +2.5V to +5.5V input voltage range and are capable of generating a wide range of outputs. The MAX1524 is intended for bootstrapped operation, permitting startup with lower input voltage. All devices have internal soft-start and short-circuit protection to prevent excessive switching current during startup and under output fault conditions. The MAX1522/MAX1524 have a latched fault mode, which shuts down the controller when a short-circuit event occurs, whereas the MAX1523 reenters soft-start mode during output fault conditions. The MAX1522/MAX1523/MAX1524 are available in a space-saving 6-pin SOT23 package.

简化框图

MAX1522、MAX1523、MAX1524:典型工作电路 MAX1522、MAX1523、MAX1524:典型工作电路 Zoom icon

技术文档

支持和培训

在Maxim的知识库中搜索您所需的答案。

过滤搜索

Maxim专业的应用工程师团队也可以为您解答技术问题,请 访问Maxim的 支持中心