MCP16321T-500E/NG

MCP16321T-500E/NG Datasheet

For further designs, please refer to the MIC24046 or MCP16311/2 Data Sheets

Part	Datasheet
MCP16321T-500E/NG	MCP16321T-500E/NG (pdf)

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PDF Datasheet Preview
Obsolete Device For further designs, please refer to the MIC24046 or MCP16311/2 Data Sheets MCP16321/2 24V Input, 1A/2A Output, High Efficiency Synchronous Buck Regulator with Power Good Indication • Up to 95% Typical Efficiency • Input Voltage Range 6.0V to 24V • 1A Output Current MCP16321 • 2A Output Current MCP16322 • Fixed Output Voltages 0.9V, 1.5V, 1.8V, 2.5V, 3.3V, 5V with 2% Output Voltage Accuracy • Adjustable Version Output Voltage Range: 0.9V to 5V with Reference Voltage Accuracy • Integrated N-Channel High-Side Switch 180 • Integrated N-Channel Low-Side Switch 120 • 1 MHz Fixed Frequency • Low Device Shutdown Current • Peak Current Mode Control • Internal Compensation • Stable with Ceramic Capacitors • Internal Soft-Start • Cycle-by-Cycle Peak Current Limit • Undervoltage Lockout UVLO 5.75V • Overtemperature Protection • VOUT Overvoltage Protection • VOUT Voltage Supervisor Reported at the PG Pin • Available Package QFN-16 3x3 mm • Microcontroller Bias Supply • 12V Industrial Input DC-DC Conversion • Set-Top Boxes • DSL Cable Modems • Automotive • Wall Cube Regulation • SLA Battery Powered Devices • AC-DC Digital Control Power Source • Power Meters • Consumer • Medical and Health Care • Distributed Power Supplies The MCP16321/2 is a highly integrated, high-efficiency, fixed frequency, synchronous step-down DC-DC converter in a 16-pin QFN package that operates from input voltages up to 24V. Integrated features include a high-side and low-side N-Channel switch, fixed frequency Peak Current Mode Control, internal compensation, peak current limit, VOUT overvoltage protection and overtemperature protection. Minimal external components are necessary to develop a complete synchronous step-down DC-DC converter power supply. High converter efficiency is achieved by integrating a high-speed, current limited, low resistance, high-side N-Channel MOSFET, as well as a high-speed, low resistance, low-side N-Channel MOSFET and associated drive circuitry. High switching frequency minimizes the size of the inductor and output capacitor, resulting in a small solution size. The MCP16321/2 device can supply 1A/2A of continuous current while regulating the output voltage from 0.9V to 5V. A 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 supplies. The regulator can be turned on and off with a logic level signal applied to the EN input. The EN input is internally pulled up to a 4.2V reference and is rated for a maximum of 6V. With EN low, typically 5 µA of current is consumed from the input, making the part ideal for power shedding and load distribution applications. The PG output is an open-drain output pin used to interface with other components of the system, and can be pulled up to a maximum of 6V. The output voltage can either be fixed at output voltages of 0.9V, 1.5V, 1.8V, 2.5V, 3.3V, 5V or adjustable using an external resistor divider. The MCP16321/2 is offered in a 3x3 QFN-16 surface mount package. 2011-2016 Microchip Technology Inc. DS20002285B-page 1 MCP16321/2 Package Type MCP16321/2 3x3 QFN* PGND PGND 16 15 14 13 12 SW VIN 2 VIN 3 SGND 4 EP 17 11 VIN 10 BOOST 9 EN 8 * Includes Exposed Thermal Pad EP see Table Typical Applications Typical Application with Adjustable Output Voltage VIN 6.0V to 24V CIN 2x10 uF BOOST CBOOST 22 nF L1 uH MCP16321/2 VOUT 10 SGND PGND VOUT 4.2V 1A/2A COUT 2x22 uF Typical Application with Fixed Output Voltage VIN 6.0V to 24V CIN 2x10 uF

PDF Datasheet Preview

Obsolete Device

For further designs, please refer to the MIC24046 or MCP16311/2 Data Sheets

MCP16321/2
24V Input, 1A/2A Output, High Efficiency Synchronous Buck Regulator with Power Good Indication
• Up to 95% Typical Efficiency
• Input Voltage Range 6.0V to 24V
• 1A Output Current MCP16321
• 2A Output Current MCP16322
• Fixed Output Voltages 0.9V, 1.5V, 1.8V, 2.5V,
3.3V, 5V with 2% Output Voltage Accuracy
• Adjustable Version Output Voltage Range:
0.9V to 5V with Reference Voltage Accuracy
• Integrated N-Channel High-Side Switch 180
• Integrated N-Channel Low-Side Switch 120
• 1 MHz Fixed Frequency
• Low Device Shutdown Current
• Peak Current Mode Control
• Internal Compensation
• Stable with Ceramic Capacitors
• Internal Soft-Start
• Cycle-by-Cycle Peak Current Limit
• Undervoltage Lockout UVLO 5.75V
• Overtemperature Protection
• VOUT Overvoltage Protection
• VOUT Voltage Supervisor Reported at the PG Pin
• Available Package QFN-16 3x3 mm
• Microcontroller Bias Supply
• 12V Industrial Input DC-DC Conversion
• Set-Top Boxes
• DSL Cable Modems
• Automotive
• Wall Cube Regulation
• SLA Battery Powered Devices
• AC-DC Digital Control Power Source
• Power Meters
• Consumer
• Medical and Health Care
• Distributed Power Supplies

The MCP16321/2 is a highly integrated, high-efficiency, fixed frequency, synchronous step-down DC-DC converter in a 16-pin QFN package that operates from input voltages up to 24V. Integrated features include a high-side and low-side N-Channel switch, fixed frequency Peak Current Mode Control, internal compensation, peak current limit, VOUT overvoltage protection and overtemperature protection. Minimal external components are necessary to develop a complete synchronous step-down DC-DC converter power supply.

High converter efficiency is achieved by integrating a high-speed, current limited, low resistance, high-side N-Channel MOSFET, as well as a high-speed, low resistance, low-side N-Channel MOSFET and associated drive circuitry. High switching frequency minimizes the size of the inductor and output capacitor, resulting in a small solution size.

The MCP16321/2 device can supply 1A/2A of continuous current while regulating the output voltage from 0.9V to 5V. A 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 supplies.

The regulator can be turned on and off with a logic level signal applied to the EN input. The EN input is internally pulled up to a 4.2V reference and is rated for a maximum of 6V. With EN low, typically 5 µA of current is consumed from the input, making the part ideal for power shedding and load distribution applications. The PG output is an open-drain output pin used to interface with other components of the system, and can be pulled up to a maximum of 6V.

The output voltage can either be fixed at output voltages of 0.9V, 1.5V, 1.8V, 2.5V, 3.3V, 5V or adjustable using an external resistor divider. The MCP16321/2 is offered in a 3x3 QFN-16 surface mount package.
2011-2016 Microchip Technology Inc.

DS20002285B-page 1

MCP16321/2

Package Type

MCP16321/2 3x3 QFN*

PGND

PGND
16 15 14 13
12 SW

VIN 2 VIN 3 SGND 4

EP 17
11 VIN 10 BOOST 9 EN 8
* Includes Exposed Thermal Pad EP see Table

Typical Applications Typical Application with Adjustable Output Voltage

VIN 6.0V to 24V

CIN 2x10 uF

BOOST

CBOOST 22 nF

L1 uH

MCP16321/2

VOUT 10

SGND

PGND

VOUT 4.2V 1A/2A

COUT 2x22 uF

Typical Application with Fixed Output Voltage

VIN 6.0V to 24V

CIN 2x10 uF

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MCP16321T-500E/NG Datasheet file may be downloaded here without warranties.

Datasheet ID: MCP16321T-500E/NG 648135