Datasheet > MAX17231ETLS

MAX17231ETLS

更新时间： 2024-11-21 02:49:31

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
29页	2022K
描述
2Vâ36V, Synchronous Dual Buck Controller with Integrated Boost and 20Î¼A Quiescent Current

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MAX17231ETLS 数据手册

MAX17230/MAX17231

2V–36V, Synchronous Dual Buck Controller with

Integrated Boost and 20µA Quiescent Current

General Description

Beneﬁts and Features

● Eliminates External Components and Reduces Total Cost

• No Schottky-Synchronous Operation for High

EfficiencyꢀandꢀReducedꢀCost

The MAX17230/MAX17231 offers dual synchronous step-

down DC-DC controllers with integrated MOSFETs and a

step-up/boost controller. They operate over a 3.5V to 36V

input voltage range, and down to 2V with the boost controller

active. The devices can operate in dropout condition by

running at 95% duty cycle. The controllers can generate

fixed output voltages of 3.3V/5V, along with the capability

to program the output voltage between 1V to 10V.

• Simple External RC compensation for Stable

Operation at Any Output Voltage

• All-Ceramic Capacitor Solution: Ultra-Compact

Layout

• 180° Out-of-Phase Operation Reduces Output

Ripple and Enables Cascaded Power Supplies

These devices use current-mode-control architecture

and can be operated in the pulse-width modulation

(PWM) or pulse-frequency modulation (PFM) control

schemes. PWM operation provides constant frequency

operation at all loads and is useful in applications

sensitive to switching frequency. PFM operation disables

negative inductor current and additionally skips pulses at

light loads for high-efficiency. The low-resistance, on-chip

MOSFETs ensure high efficiency at full load and simplify

the layout.

● Reduces Number of DC-DC Controllers to Stock

• Fixed Output Voltage with ±1% Accuracy (5V/3.3V)

or Externally Resistor Adjustable (1V to 10V)

• 220kHz to 2.2MHz Adjustable Frequency with

External Synchronization

• Frequency Synchronization Input

● Reduces Power Dissipation

• 92%ꢀPeakꢀEfficiency

• 8μAꢀ(typ)ꢀinꢀShutdown

• 20μAꢀ(typ)ꢀQuiescentꢀCurrentꢀinꢀPFMꢀMode

The MAX17230/MAX17231 include a boost controller.

This boost circuitry turns on during low input voltage

conditions. It is designed to power step-down controller

channels with input voltages as low as 2V.

● Operates Reliably

• 42V Input Voltage Transient Protection

• Cycle-by-Cycle Current Limit, Thermal Shutdown

• Supply Overvoltage and Undervoltage Lockout

• Power-OK Monitor

• Reduced EMI Emission with Spread-Spectrum Control

• 50ns Minimum On-Time Guarantees PWM

Operation at Low Duty Cycle at 2.2MHz

These devices are available in a 40-pin TQFN package

with exposed pad, and are specified for operation over

-40°C to +85°C.

Applications

● Distributed Supply Regulation

● Wall Transformer Regulation

● General-Purpose Point-of-Load

Ordering Information and Selector Guide appear at end of

data sheet.

19-8313; Rev 0; 2/16

12 3 4 5 6 7...29

中文翻译

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与MAX17231ETLS相关器件

型号	品牌	获取价格	描述	数据表
MAX17231ETLV	MAXIM	获取价格	2Vâ36V, Synchronous Dual Buck Controller wi
MAX17231ETLW	MAXIM	获取价格	2Vâ36V, Synchronous Dual Buck Controller wi
MAX17231ETLW/T+	MAXIM	获取价格	Dual Switching Controller,
MAX17232	MAXIM	获取价格	Eliminates External Components and Reduces Total Cost
MAX17232	ADI	获取价格	3.5V至36V、2.2MHz、双路同步Buck控制器，20μA静态电流
MAX17232ETI_+	MAXIM	获取价格	Eliminates External Components and Reduces Total Cost
MAX17232ETIR+	MAXIM	获取价格	Eliminates External Components and Reduces Total Cost
MAX17232ETIS+	MAXIM	获取价格	Dual Switching Controller,
MAX17232ETIS+T	MAXIM	获取价格	3.5V 36V, 2.2MHZ, SYNCHRONOUS DU
MAX17233	MAXIM	获取价格	Eliminates External Components and Reduces Total Cost

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