- MPQ8645
MPQ8645
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Description
The MPQ8645 is a fully integrated, high-frequency, synchronous buck converter. The MPQ8645 offers a very compact solution that achieves up to 30A of output current (IOUT), with excellent load and line regulation across a wide input supply range. The MPQ8645 operates at high efficiency across a wide IOUT load range.
The MPQ8645 adopts an internally compensated constant-on-time (COT) control mode that provides fast transient response and eases loop stabilization. The switching frequency (fSW) is 800kHz and remains constant regardless of the input and output voltages. An open-drain power good (PG) signal indicates whether the output is within its nominal voltage range.
Fully integrated protection features include over-current protection (OCP), over-voltage protection (OVP), under-voltage protection (UVP), and over-temperature protection (OTP).
The MPQ8645 requires a minimal number of readily available, standard external components, and is available in a TQFN-25 (4mmx5mm) package.
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Features & Benefits
- 3.1V to 16V with External 3.3V VCC Bias
- 4V to 16V with Internal Bias or External 3.3V VCC Bias
- 30A Continuous Output Current (IOUT)
- Low On Resistance (RDS(ON)), Integrated Power MOSFETs
- Lossless and Accurate On-Die Current Sensing
- Adaptive Constant-On-Time (COT) for Ultra-Fast Transient Response
- Stable with Zero-ESR Output Capacitors
- 0.5% Reference Voltage across 0°C to 70°C Junction Temperature (TJ) Range
- Output Voltage (VOUT) True Remote Sense
- Forced Continuous Conduction Mode (FCCM) Operation
- Power Good (PG) Active-Clamped at Low Level during Power Failure
- VOUT Discharge
- Pre-Biased Start-Up
- Excellent Load Regulation
- 800kHz Switching Frequency (fSW)
- 2ms Soft-Start Time (tSS)
- Output Adjustable from 0.6V to 0.9 x VIN Up to 5.5V Max
- Hiccup Mode for Over-Current Protection (OCP), Over-Voltage Protection (OVP), Under-Voltage Protection (UVP), and Over-Temperature Protection (OTP)
- Available in a TQFN-25 (4mmx5mm) Package

Active Part Numbers:
MPQ8645GVT-Z MPQ8645GVT-P
Part numbers ending in P and Z are the same parts. P and Z only indicates reel size.
Meaning of P & Z
MPQ8645 Resources
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ARTICLE
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APPLICATION
POWER SOLUTION FOR 5GAPPLICATION -
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POWER SOLUTION FOR NICAPPLICATION -
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POWER SOLUTION FOR SWITCHESAPPLICATION -
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SMALL CELL BASE STATIONSAPPLICATIONSmall cell base stations are more useful than ever with the ubiquity of smartphones, rising data usage, and the advent of 5G. However, small cell base station designs must meet these demands as well as weight and volume restrictions, without sacrificing performance or significantly increasing power consumption. Todays wireless market demands reliability and flexibility wherever possible, so new pr...
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PRODUCT CATEGORY
STEP-DOWN (BUCK)PRODUCT CATEGORY -
PRODUCT CATEGORY
VIN (MAX) 14V TO 19VPRODUCT CATEGORY -
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