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MCP16311T-E/MS

30V/1A sync buck, PFM/PWM auto-mode, 95% eff, 500kHz, MSOP-8, T&R

9100

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Manufacturer Part：

MCP16311T-E/MS

Package：

MSOP-8 (3.0 x 3.0 x 1.10 mm)

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Description

Product Overview

The MCP16311T-E/MS from Microchip Technology is a 30 V, 1 A synchronous buck regulator in an 8-pin MSOP package. It features automatic PFM/PWM mode operation for high efficiency across the entire load range, peak current mode control, and internal compensation, requiring minimal external components.

Key Specifications

Input Voltage Range 4.4 V to 30 V
Output Voltage Range 2.0 V to 24 V (adjustable)
Output Current 1 A
Switching Frequency 500 kHz
Reference Voltage 0.8 V
High-Side RDS(on) 300 mOhm
Low-Side RDS(on) 170 mOhm
Efficiency Up to 95%
Operating Temperature -40°C to +125°C (TJ)

Features

  • Automatic PFM/PWM mode for high efficiency at light and heavy loads
  • Integrated high-side and low-side MOSFET switches
  • Internal soft-start: 300 us turn-on time
  • Peak current mode control with internal compensation
  • Low 3 uA shutdown current and 44 uA quiescent current in PFM mode
  • Cycle-by-cycle peak current limit protection
  • Undervoltage lockout at 3.6 V typical with 0.5 V hysteresis
  • Thermal shutdown at 150°C with 25°C hysteresis

Applications

  • Industrial and automotive distributed power systems
  • Battery-powered devices and portable instruments
  • Set-top boxes and consumer electronics
  • USB-powered and wall adapter applications

The MCP16311T-E/MS from Microchip Technology is a compact, high-efficiency, fixed-frequency synchronous step-down DC-DC converter that operates from input voltages up to 30 V. It integrates both high-side (300 mOhm) and low-side (170 mOhm) N-channel MOSFET switches in an 8-pin MSOP package, providing up to 1 A output current with adjustable output voltage from 2.0 V to 24 V. The device employs peak current mode control with internal compensation, simplifying the design by eliminating external compensation components. A key feature is the automatic PFM/PWM mode switching: the device operates in PWM mode at heavier loads for low output ripple, and automatically transitions to PFM mode at light loads to maintain high efficiency. The quiescent current in PFM mode is only 44 uA, and the shutdown current is a mere 3 uA, making the device ideal for battery-powered applications. The internal 300 us soft-start limits inrush current, while cycle-by-cycle current limiting and thermal shutdown provide robust protection.

The MCP16311T-E/MS operates through four key subsystems: (1) The control loop uses peak current mode control where the output voltage is sensed via the FB pin and compared to the 0.8 V internal reference. The error amplifier output controls the peak inductor current on a cycle-by-cycle basis. Internal compensation eliminates the need for external RC networks. (2) The power stage consists of integrated high-side and low-side N-channel MOSFETs driven by the BOOST capacitor circuit. The high-side switch connects the input to the inductor during the on-time, while the low-side switch provides a synchronous freewheeling path during the off-time, achieving up to 95% efficiency. (3) The mode controller automatically switches between PWM and PFM based on load current. In PWM mode at 500 kHz, the device maintains constant frequency operation. Below a load threshold, it enters PFM mode where switching pulses are skipped to reduce gate drive and switching losses, maintaining efficiency above 80% even at 1 mA load. (4) Protection circuits include UVLO at 3.6 V, cycle-by-cycle current limit, and thermal shutdown at 150°C.

Pin No. Pin Name Function
1 VIN Input voltage supply (4.4-30 V)
2 VCC Internal 5 V LDO output, bypass with 1 uF
3 EN Enable input (active high, internal pull-up)
4 VFB Voltage feedback input (0.8 V reference)
5 GND Power ground
6 SW Switching node (inductor connection)
7 BOOST Bootstrapped supply for high-side driver
8 GND Signal ground
  • Industrial distributed power architectures converting 12 V or 24 V bus to 3.3 V or 5 V point-of-load rails at up to 1 A
  • Battery-powered portable instruments requiring high efficiency across the full load range with PFM/PWM auto-switching
  • USB-powered devices converting 5 V bus to 3.3 V or 1.8 V logic rails with minimal external components
  • Automotive auxiliary power supplies operating from 12 V battery with cold-crank immunity down to 4.4 V input
Model Brand Vin Max Iout Package
MCP16312T-E/MS Microchip 30 V 1 A MSOP-8
TPS560200DBVR TI 17 V 500 mA SOT-23-5
LMR16006YQDDCRQ1 TI 40 V 600 mA SOT-23-6
AP63200WU-7 Diodes 32 V 2 A TSOT-26
MP1584EN-LF-Z MPS 28 V 3 A SOIC-8
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

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We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Shipping & Payment

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5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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We cooperate with mainstream international logistics providers including DHL, FedEx, UPS and TNT to achieve fast global delivery. We can provide complete export documents such as customs declaration files, commercial invoices and packing lists to ensure smooth customs clearance for international shipments. Local pickup is also available for customers in Shenzhen, China.

Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

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We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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