MAX20077

36V、2.5A、微型Buck转换器，3.5uA I_Q

业界最佳、超低I_Q 、微型Buck转换器，汽车应用的理想选择

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概述

说明

MAX20077/MAX25277是小尺寸、同步降压型转换器，集成高边和低边开关。器件在3.5V至36V输入电压下提供高达2.5A (MAX20077ATCC/VY+版本为2.0A)电流，空载时的静态电流仅为3.5μA。

在FPWM模式下，器件在6V至18V工作输入电压范围下提供精度为±2%的输出电压。转换器具备20ns最小导通时间，能够提供较大输入至输出转换比。通过PGOOD信号，可监测电压质量。器件可工作在99%占空比的低压差模式，使其成为汽车和工业应用的理想选择。在FPWM模式下，器件提供5V和3.3V两种固定输出电压。此外，使用外部电阻分压器，可将器件配置为1V至10V输出电压。频率内部固定为2.1MHz，允许使用较小的外部元件，以及降低输出纹波、保证无AM干扰。也提供400kHz选项，可提供最小开关损耗和最大效率。器件在轻载时自动进入跳脉冲模式，空载时具有超低的3.5µA静态电流。器件提供引脚使能的扩频调制，将调制频率引起的EMI辐射发射降至最低。

提供MAX20077/MAX25277版本，采用小尺寸(3mm x 3mm)、12引脚、侧面可润湿TDFN封装，带有裸焊盘，需要极少外部元件。

关键特性

同步DC-DC转换器，集成FET
- MAX20077ATCA/VY+/B/D/E = 2.5A I_OUT
- MAX20077ATCC/VY+ = 2.0A I_OUT
- 待机模式下的静态电流仅为3.5μA
小尺寸方案节省空间
- 20ns最小导通时间
- 2.1MHz或400kHz工作频率
- 1V至10V可编程输出电压，或提供固定5V/3.3V选项
- 固定3.5ms内部软启动
- 固定输出电压，输出精度为±2% (5V/3.3V)；或者外部电阻可调(1V至10V)输出，精度为±1.5% FB
- 创新的电流模式控制结构，最大程度降低总电路板空间和BOM数量
PGOOD输出和高压EN输入，简化电源排序
保护特性和工作范围是汽车应用的理想选择
- 3.5V至36V工作V_IN范围
- 40V抛负载保护
- 99%占空比，低压差
- -40°C至+125°C汽车级温度范围
- AEC-Q100认证

应用

汽车
高电压DC-DC转换器
工业

参数规格

Part Number

V_IN
(V)

V_OUT1
(V)

Preset V_OUT
(V)

Output Adjust. Method

I_OUT1
(A)

Switch Type

Synchronous Switching

Power Good Signal

DC-DC Outputs

Oper. Freq.
(kHz)

Design Tools

Package/Pins

Budgetary
Price

min

max

min

max

See Notes

MAX20077

3.5

3.3

Preset

Resistor

2.5

Internal

Yes

400

2100

EE-Sim

TDFN-CU/12

$1.09 @1k

MAX25277

TDFN-CU/12

查看所有Step-Down Switching Regulators (367)

Pricing Notes:

价格仅供参考，用于同类产品的比较。所提供报价为美元，需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题，请参考：价格与供货网站或与指定代理商联系。

设计资源

MAX20077EVKIT: MAX20077评估板

质量与环境

型号	生产流程	工艺	样本量	不合格	FIT @ 25°C	FIT @ 55°C

备注：通过技术手段对故障率进行汇总，并映射到相关的材料部件号。故障率与被测件的数量密切相关。

质量管理体系 >
环境管理体系 >

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