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MIC23350

3A Buck Regulator with HyperLight Load® & I2C

Status: In Production

Features:

  • 3A Continuous Output Current
  • Reduced Component Count (No Feedback Resistors)
  • High Efficiency (up to 95%)
  • Constant-ON-Time Control with High Switching Frequency:
  • Three-State pins (nine voltage options)
  • 0.6V, 0.8V, 0.9V, 1.0V, 1.2V, 1.5V, 1.8V, 2.5V or 3.3V output voltage
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The MIC23350 is a high-efficiency, low-voltage input, 3A continuous current synchronous step-down regulator. The Constant-ON-Time (COT) control architecture with HyperLight Load™ provides very high efficiency at light loads, while still having ultra-fast transient response.

The MIC23350 output voltage is set by two VSEL (Voltage Selection) pins, between nine different values. This method eliminates the need for an external feedback resistor divider and improves the output voltage setting accuracy. 

The 2.4V to 5.5V input voltage range, low shutdown and quiescent currents make the MIC23350 ideal for single-cell Li-Ion battery-powered applications. The 100% duty cycle capability provides low dropout operation, extending operating range in portable systems.

The MIC23350 pinout is compatible with the MIC23356 I2C-based programmable regulator version, such that applications can be easily converted. An open-drain Power Good output is provided to indicate when the output voltage is within 9% of regulation and facilitates the interface with an MCU, or power sequencing. If set in shutdown (EN=GND), the MIC23350 typically draws 1.5 µA, while the output is discharged through 10W pull-down.

The MIC23350 is available in a thermally efficient, 16 Lead 2.5 mm x 2.5 mm x 0.55 mm thin FTQFN package, with an operating junction temperature range from –40°C to +125°C.

Additional Features
  • 2.4V to 5.5V Input Voltage Range
  • 3A Continuous Output Current
  • Reduced Component Count (No Feedback Resistors)
  • High Efficiency (up to 95%)
  • Output Discharge when Disabled
  • Constant-ON-Time Control with High Switching Frequency:
  • 1.2 MHz typical at 1.0V output voltage
  • ±1.5% Output Voltage Accuracy Over Line/Load/Temperature Range
  • 0.8 ms/V Soft Start Speed
  • Supports Safe Start-Up with Pre-Biased Output
  • Typical 1.5 µA Shutdown Supply Current
  • Low Dropout Operation (100% Duty Cycle)
  • Ultra Fast Transient Response
  • Latch-Off Thermal Shutdown Protection
  • Latch-Off Current Limit Protection
  • Power Good (PG) Open-Drain Output
  • Pin Strapping Voltage Selection:
    • Three-State pins (nine voltage options)
    • 0.6V, 0.8V, 0.9V, 1.0V, 1.2V, 1.5V, 1.8V, 2.5V or 3.3V output voltage
Parametrics
Name
Value
Regulator Type
Step Down (Buck)
# of Outputs
1
Input Voltage Range Min (V)
2.4
Input Voltage Range Max (V)
5.5
Output Voltage Range Min (V)
0.6
Output Voltage Range Max (V)
3.84
Output Current (mA) max
3000
Quiescent Current (mA) typ
.060
Switching Frequency (kHz)
1200
Synchronous Rectifier
Yes
Operating Temp Range
-40 to 125
Vfb (V)
0.6
Duty Cycle Max (%)
100
SHUTDOWN Current (µA) (Typ)
1.5
Light Load Efficiency Mode
Yes

Documents

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Data Sheets

03/06/2019
757KB

Development Environment

  • Demo & Evaluation Boards
Demo & Evaluation Boards
MIC23350 3A Synch Buck Regulator Eval Bd
MIC23350 3A Synch Buck Regulator Eval Bd ( ADM00880 )

The MIC23350 Evaluation Board is developed to evaluate and demonstrate Microchip Technology’s MIC23350 product. The board features the MIC23350 in a typical Buck application supplied from an external source, between 2.4V – 5.5V. Nine output voltage levels can be set via two Voltage Select pins. Test connectors allow probing, while the board can be loaded up to 3A.

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC23350YFT-TR
0.000000
16
UQFN
2.5x2.5x0.6mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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