MPQ8632GLE-6-Z: Advanced 6A Synchronous Buck Regulator for High-Performance Power Systems

Technical Deep Dive: Unmatched Efficiency in Power Conversion

The MPQ8632GLE-6-Z from Monolithic Power Systems (MPS) represents the pinnacle of synchronous buck converter technology. This 6A output current regulator delivers industry-leading 95% peak efficiency through its advanced control architecture and ultra-low R_DS(on) MOSFETs (typically 18m /12m for high/low side).

Precision Voltage Regulation

• 1% output voltage accuracy over full load range
• 0.611V reference voltage enables modern low-voltage processors
• Programmable soft-start (50 s to 10ms) prevents inrush current

Thermal Management Features

The 16-QFN (3x4mm) package incorporates an exposed thermal pad with 2.5 C/W junction-to-ambient thermal resistance, enabling:

• Continuous 6A operation at 85 C ambient temperature
• Thermal shutdown at 150 C (typ) with hysteresis

Design Advantages Over Competing Solutions

1. Frequency Synchronization

Unlike basic regulators, the MPQ8632GLE-6-Z offers:

• External clock synchronization (200kHz-1MHz)
• Selectable FPWM mode for low-noise applications
• Spread spectrum option for EMI reduction

2. Protection Circuitry

Protection	Threshold	Response
Over-current	7.5A (typ)	Hiccup mode
Over-voltage	115% VOUT	Latch-off
Under-voltage	70% VIN	Automatic recovery

Application-Specific Design Guidelines

FPGA Power Systems

For Xilinx UltraScale+ designs:

1. Configure output for 0.85V core voltage
2. Set switching frequency to 800kHz for optimal ripple
3. Use 2.2 H shielded inductor (e.g., W rth Elektronik 7443630220)

Industrial IoT Devices

Best practices for 24V systems:

• Add input TVS diode for surge protection
• Parallel 10 F ceramic + 100 F electrolytic input capacitors
• Enable power-good output for sequencing

Benchmark Data

Test conditions: V_IN=12V, V_OUT=5V, T_A=25 C

Load Current	Efficiency	Thermal Rise
1A	94.2%	8 C
3A	95.1%	22 C
6A	93.8%	41 C

Purchasing Information

Available through authorized distributors:

• Digi-Key: Stock # 1588-MPQ8632GLE-6-Z-ND
• Mouser: Part # 946-MPQ8632GLE6Z
• MOQ: 1000 units, lead time 8 weeks

For volume pricing (>10k units), contact MPS directly for 25% discount opportunities.

FAQs

Q: Can this regulator power DDR4 memory?
A: Yes, when configured for 1.2V output with appropriate bulk capacitance. Q: Is external compensation required?
A: No, the MPQ8632GLE-6-Z features internal compensation for most applications. Q: What's the typical BOM cost for a complete solution?
A: Approximately $3.20 in 1k quantities, including all passives.