MCP16331 datasheet(1/40 Pages) MICROCHIP

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 2014 Microchip Technology Inc.

DS20005308B-page 1

MCP16331

Features:

• Up to 96% Efficiency

• Input Voltage Range: 4.4V to 50V

• Output Voltage Range: 2.0V to 24V

• 2% Output Voltage Accuracy

• Qualification: AEC-Q100 Rev. G, Grade 1(-40oC

to 125oC)

• Integrated N-Channel Buck Switch: 600 m



• Minimum 500 mA Output Current Over All Input

Voltage Range (See Figure 2-9 for Maximum

Output Current vs. VIN)

- Up to 1.2A Output Current at 3.3V and 5V

VOUT, VIN>12V, SOT-23 package at 25oC

ambient temperature

- Up to 0.8A Output Current at 12V VOUT,

VIN>18V, SOT-23 package at 25oC ambient

temperature

•500 kHz Fixed Frequency

• Adjustable Output Voltage

• Low Device Shutdown Current

• Peak Current Mode Control

• Internal Compensation

• Stable with Ceramic Capacitors

• Internal Soft-Start

• Internal Pull-Up on EN

• Cycle-by-Cycle Peak Current Limit

• Undervoltage Lockout (UVLO): 4.1V to Start;



3.6V to Stop

• Overtemperature Protection

• Available Package: 6-Lead SOT-23, 8-Lead 2x3

TDFN

Applications:

•PIC® MCU/dsPIC® DSC Microcontroller Bias

Supply

• 48V, 24V and 12V Industrial Input DC-DC

Conversion

• Set-Top Boxes

• DSL Cable Modems

• Automotive

• AC/DC Adapters

• SLA Battery Powered Devices

• AC-DC Digital Control Power Source

• Power Meters

•Consumer

• Medical and Health Care

• Distributed Power Supplies

General Description:

The MCP16331 is a highly integrated, high-efficiency,

fixed frequency, step-down DC-DC converter in a

popular 6-pin SOT-23 or 8-pin TDFN 2x3 package that

operates from input voltage sources up to 50V.

Integrated features include a high side switch, fixed

frequency Peak Current Mode Control, internal

compensation, peak current limit and overtemperature

protection.

Minimal

external

components

are

necessary to develop a complete step-down DC-DC

converter power supply.

High converter efficiency is achieved by integrating the

current-limited, low-resistance, high-speed N-Channel

MOSFET and associated drive circuitry. High switching

frequency minimizes the size of external filtering

components resulting in a small solution size.

The MCP16331 can supply 500 mA of continuous

current while regulating the output voltage from 2.0V to

24V. An integrated, high-performance peak current

mode architecture keeps the output voltage tightly

regulated, even during input voltage steps and output

current transient conditions that are common in power

systems.

The EN input is used to turn the device on and off.

While off, only a few µA of current are consumed from

the input for power shedding and load distribution

applications. This pin is internally pulled up, so the

device will start even if the EN pin is left floating.

Output voltage is set with an external resistor divider.

The MCP16331 is offered in a space saving 6-Lead

SOT-23 and 8-Lead 2x3 TDFN surface mount package.

Package Type

MCP16331

6-Lead SOT-23

MCP16331

8-Lead 2x3 TDFN*

VFB

GND

EN

1

2

3

6

4

SW

BOOST

5

VIN

NC

EN

NC

1

2

3

4

8

7

6

5

SW

EP

9

VIN

BOOST

VFB

GND

* Includes Exposed Thermal Pad (EP); see Table 3-1

High-Voltage Input Integrated Switch Step-Down Regulator

Số phần tương tự - MCP16331

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