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  4. 16V, 20A, Configurable Frequency Synchronous Step-Down Converter with Adjustable Current Limit and Voltage Tracking MPQ8643 (Monolithic Power Systems, Inc.)
16V, 20A, Configurable Frequency Synchronous Step-Down Converter with Adjustable Current Limit and Voltage Tracking MPQ8643-MPQ8643
16V, 20A, Configurable Frequency Synchronous Step-Down Converter with Adjustable Current Limit and Voltage Tracking MPQ8643-Monolithic Power Systems, Inc.

16V, 20A, Configurable Frequency Synchronous Step-Down Converter with Adjustable Current Limit and Voltage Tracking MPQ8643
Monolithic Power Systems, Inc.

Monolithic Power Systems, Inc.'s Response Status

Response Rate

100.0%

Response Time

15.6hours

Relatively Fast Response

About This Product

■Summary

The MPQ8643 is an integrated, high frequency step-down converter. The MP2332 is a highly compact solution with excellent load and line regulation and up to 20A of output current (IOUT) over a wide input voltage (VIN) range. The MPQ8643 operates with high efficiency over a wide IOUT load range. Internally compensated constant-on-time (COT) control provides fast transient response and facilitates loop stabilization. The selectable switching frequency (fSW) can be set to 600kHz, 800kHz, or 1,000kHz by setting the MODE pin. This allows constant fSW to be maintained regardless of VIN and output voltage (VOUT). During start-up, an internal soft-start time (tSS) (1ms) ramps up VOUT in a controlled manner. tSS can be increased by adding a capacitor to the TRK/REF pin. An open-drain power-good (PG) signal indicates whether VOUT is within its nominal voltage range. If the input cannot power the MPQ8643, the PG voltage (VPG) is clamped to approximately 0.7V by an external pull-up voltage. Extensive protection features include overcurrent protection (OCP), overvoltage protection (OVP), undervoltage protection (UVP), and overtemperature protection (OTP). The MPQ8643 requires minimal standard external components and is available in a QFN-21 (3mm x 4mm) package.

■Wide input voltage (VIN) range

・2.7V to 16V with external 3.3V bias ・4V to 16V with internal bias or external 3.3V bias

■Reference voltage (VREF) accuracy

・Accuracy of 0.5%VREF from 0℃ to 70℃ ・1%VREF from -40℃ to +125℃

■Features and benefits

・Differential output remote detection ・Accurate configurable current limit (ILIMIT) ・20A output current (IOUT) ・Built-in low RDS (ON) power MOSFET ・Unique switching loss reduction technology ・Adaptive constant on-time (COT) for ultra-fast transient response ・Stable with zero ESR output capacitor -Selectable pulse-skipping mode (PSM) or forced continuous conduction mode (FCCM)

  • Product

    16V, 20A, Configurable Frequency Synchronous Step-Down Converter with Adjustable Current Limit and Voltage Tracking MPQ8643

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1 Models of 16V, 20A, Configurable Frequency Synchronous Step-Down Converter with Adjustable Current Limit and Voltage Tracking MPQ8643

Image Part Number Price (excluding tax) Iout (max) (A) Iq (typ) (mA) Max Duty Cycle (%) P.G. SS Vfb (V) Fsw (max) (kHz) Grade Package (mm) Input voltage (max) (V) Input voltage (min) (V)
16V, 20A, Configurable Frequency Synchronous Step-Down Converter with Adjustable Current Limit and Voltage Tracking MPQ8643-Part Number-MPQ8643

MPQ8643

Available upon quote

20

0.65

90

Yes

External

0.6

1,000

Industrial

QFN-21 (3x4)

16

4

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About Company Handling This Product

Monolithic Power Systems, Inc.

Response Rate

100.0%

Response Time

15.6hrs

Company Overview

Monolithic Power Systems (MPS), founded in 1997 and headquartered in San Jose, California, is a manufacturer o...

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