MP38872DL-LF-P

MP38872DL-LF-P Datasheet

MP38872

Part	Datasheet
MP38872DL-LF-P	MP38872DL-LF-P (pdf)

Related Parts	Information
MP38872DL-LF-Z	MP38872DL-LF-Z

PDF Datasheet Preview
The Future of Analog IC Technology MP38872 6A, 21V, 600kHz Step-Down Converter with Synchronizable Gate Driver The MP38872 is a monolithic step-down switch mode converter with a built in high-side internal power MOSFET and a gate driver for a low-side external MOSFET. It achieves 6A continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and reliable over-current protection. The MP38872 requires a minimum number of readily available standard external components and is available in a 14-pin QFN 3x4 package with exposed pad. • Wide 4.5V to 21V Operating Input Range • 6A Output Current • Internal Power MOSFET Switch • Power Good Indicator • Synchronizable Gate Driver Delivers up to 95% Efficiency • Fixed 600kHz Frequency • Synchronizable to >1MHz External Clock • Cycle-by-Cycle Over Current Protection • Thermal Shutdown • Output Adjustable from 0.8V • Stable with Low ESR Output Ceramic Capacitors • Available in a Thermally Enhanced 14-Pin QFN 3x4 Package • Point of Load Regulator in Distributed Power System • Digital Set Top Boxes • Personal Video Recorders • Broadband Communications • Flat Panel Television and Monitors For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. VIN C1 22uF 25V C3 1uF 16V Power Good OFF ON 4, 5, 6 IN 11 BST R3 100kΩ SW VCC MP38872 BG 8, 9, 10 13 3 EN/SYNC C4 1uF L1 16V 2.2uH R1 40.2kΩ R2 13kΩ VOUT 3.3V C2 100uF 6.3V EFFICIENCY % Efficiency vs Output Current VIN=12V VIN=20V VOUT=3.3V 50 0123456 OUTPUT CURRENT A 9/21/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved. ORDERING INFORMATION Package QFN14 3x4 Top Marking 38872 Free Air Temperature TA to +85°C * For Tape & Reel, add suffix e.g. For RoHS Compliant Packaging, add suffix e.g. PACKAGE REFERENCE PIN 1 ID TOP VIEW FB 1 PG 2 EN/SYNC 3 IN 4 IN 5 IN 6 N/C 7 EXPOSED PAD ON BACKSIDE 14 GND 13 BG 12 VCC 11 BST 10 SW 9 SW 8 SW ABSOLUTE MAXIMUM RATINGS 1 Supply Voltage VIN 23V VSW........................-0.3V -5V for < 10ns to 24V VBS - 6V All Other Pins to +6V Continuous Power Dissipation TA = +25°C 2 QFN14L 3mm x 4mm 2.6W Junction Temperature ...............................150°C Lead Temperature Storage Temperature.............. to +150°C Recommended Operating Conditions 3 Supply Voltage VIN ...........................4.5V to 21V Output Voltage VOUT.........................0.8V to 15V Maximum Junction Temp. TJ . ...............+125°C Thermal Resistance 4 QFN14L 3mm x 4mm 48 °C/W Notes 1 Exceeding these ratings may damage the device. 2 The maximum allowable power dissipation is a function of the maximum junction temperature TJ MAX , the junction-toambient thermal resistance and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD MAX = TJ MAX TA / Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3 The device is not guaranteed to function outside of its operating conditions. 4 Measured on JESD5 1-7, 4-layer PCB. 9/21/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved. MP38872 6A, 21V, 600kHz STEP-DOWN WITH SYNCHRONIZABLE GATE DRIVER ELECTRICAL CHARACTERISTICS VIN = 12V, TA = +25°C, unless otherwise noted. Parameters Feedback Voltage Feedback Current Switch On Resistance 5 Switch Leakage Current Limit 5 VFB IFB RDS ON Oscillator Frequency Fold-back Frequency Maximum Duty Cycle Minimum On Time 5 Under Voltage Lockout Threshold Rising Under Voltage Lockout Threshold Hysteresis tON VCC_UVLO EN Input Low Voltage EN Input High Voltage EN Input Current Sync Frequency Range Low Sync Frequency Range High Enable Turnoff Delay Supply Current Shutdown Supply Current Quiescent Thermal Shutdown Thermal Shutdown Hysteresis BG Driver Bias Supply Voltage Gate Driver Sink Impedance 5 Gate Driver Source Impedance 5 Gate Drive Current Sense Trip Threshold Power Good Control Power Good Threshold Rising Power Good Threshold Hysteresis PG Pin Level Note 5 Guaranteed by design.

PDF Datasheet Preview

The Future of Analog IC Technology

MP38872
6A, 21V, 600kHz Step-Down Converter with Synchronizable Gate Driver

The MP38872 is a monolithic step-down switch mode converter with a built in high-side internal power MOSFET and a gate driver for a low-side external MOSFET. It achieves 6A continuous output current over a wide input supply range with excellent load and line regulation.

Current mode operation provides fast transient response and reliable over-current protection.

The MP38872 requires a minimum number of readily available standard external components and is available in a 14-pin QFN 3x4 package with exposed pad.
• Wide 4.5V to 21V Operating Input Range
• 6A Output Current
• Internal Power MOSFET Switch
• Power Good Indicator
• Synchronizable Gate Driver Delivers up to
95% Efficiency
• Fixed 600kHz Frequency
• Synchronizable to >1MHz External Clock
• Cycle-by-Cycle Over Current Protection
• Thermal Shutdown
• Output Adjustable from 0.8V
• Stable with Low ESR Output Ceramic

Capacitors
• Available in a Thermally Enhanced 14-Pin

QFN 3x4 Package
• Point of Load Regulator in Distributed Power System
• Digital Set Top Boxes
• Personal Video Recorders
• Broadband Communications
• Flat Panel Television and Monitors

For MPS green status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc.

VIN C1
22uF 25V

C3 1uF 16V

Power Good

OFF ON
4, 5, 6 IN
11 BST

R3 100kΩ

SW VCC

MP38872 BG
8, 9, 10 13
3 EN/SYNC

C4 1uF L1 16V 2.2uH

R1 40.2kΩ

R2 13kΩ

VOUT 3.3V

C2 100uF 6.3V

EFFICIENCY %

Efficiency vs Output Current

VIN=12V

VIN=20V

VOUT=3.3V
50 0123456

OUTPUT CURRENT A
9/21/2011

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
2011 MPS. All Rights Reserved.
ORDERING INFORMATION

Package QFN14 3x4

Top Marking 38872

Free Air Temperature TA to +85°C
* For Tape & Reel, add suffix e.g. For RoHS Compliant Packaging, add suffix e.g.

PACKAGE REFERENCE

PIN 1 ID

TOP VIEW

FB 1 PG 2 EN/SYNC 3 IN 4 IN 5 IN 6 N/C 7

EXPOSED PAD ON BACKSIDE
14 GND 13 BG 12 VCC 11 BST 10 SW 9 SW 8 SW

ABSOLUTE MAXIMUM RATINGS 1

Supply Voltage VIN 23V VSW........................-0.3V -5V for < 10ns to 24V VBS - 6V All Other Pins to +6V Continuous Power Dissipation TA = +25°C 2 QFN14L 3mm x 4mm 2.6W Junction Temperature ...............................150°C Lead Temperature Storage Temperature.............. to +150°C

Recommended Operating Conditions 3

Supply Voltage VIN ...........................4.5V to 21V Output Voltage VOUT.........................0.8V to 15V Maximum Junction Temp. TJ . ...............+125°C

Thermal Resistance 4

QFN14L 3mm x 4mm 48 °C/W

Notes 1 Exceeding these ratings may damage the device. 2 The maximum allowable power dissipation is a function of the
maximum junction temperature TJ MAX , the junction-toambient thermal resistance and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD MAX = TJ MAX TA / Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3 The device is not guaranteed to function outside of its operating conditions. 4 Measured on JESD5 1-7, 4-layer PCB.
9/21/2011

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
2011 MPS. All Rights Reserved.

MP38872 6A, 21V, 600kHz STEP-DOWN WITH SYNCHRONIZABLE GATE DRIVER

ELECTRICAL CHARACTERISTICS

VIN = 12V, TA = +25°C, unless otherwise noted.

Parameters

Feedback Voltage

Feedback Current Switch On Resistance 5

Switch Leakage Current Limit 5

VFB IFB RDS ON

Oscillator Frequency

Fold-back Frequency

Maximum Duty Cycle Minimum On Time 5

Under Voltage Lockout Threshold Rising

Under Voltage Lockout Threshold Hysteresis
tON VCC_UVLO

EN Input Low Voltage

EN Input High Voltage

EN Input Current

Sync Frequency Range Low Sync Frequency Range High Enable Turnoff Delay Supply Current Shutdown Supply Current Quiescent Thermal Shutdown Thermal Shutdown Hysteresis BG Driver Bias Supply Voltage Gate Driver Sink Impedance 5 Gate Driver Source Impedance 5 Gate Drive Current Sense Trip Threshold Power Good Control Power Good Threshold Rising Power Good Threshold Hysteresis PG Pin Level

Note 5 Guaranteed by design.

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 MP38872DL-LF-P Datasheet file may be downloaded here without warranties.

Datasheet ID: MP38872DL-LF-P 650030