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MIC2177

Features: • 4.5V to 16.5V input voltage range• Dual-mode operation for high efficiency (up to 96%)PWM mode for > 200mA load currentSkip mode for < 200mA load current• 100mW internal power MOSFETs at 12V input• 200kHz preset switching frequency• Low quiescent cur...

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SeekIC No. : 004420706 Detail

MIC2177: Features: • 4.5V to 16.5V input voltage range• Dual-mode operation for high efficiency (up to 96%)PWM mode for > 200mA load currentSkip mode for < 200mA load current• 100mW i...

MIC2177 Data Sheet

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Part Number:
MIC2177
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/26

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Product Details

Description



Features:

• 4.5V to 16.5V input voltage range
• Dual-mode operation for high efficiency (up to 96%)
PWM mode for > 200mA load current
Skip mode for < 200mA load current
• 100mW internal power MOSFETs at 12V input
• 200kHz preset switching frequency
• Low quiescent current
1.0mA in PWM mode
500mA in skip mode
< 5mA in shutdown mode
• 100% duty cycle for low dropout operation
• Current-mode control
Simplified loop compensation
Superior line regulation
• Current limit
• Thermal shutdown
• Undervoltage lockout




Application

• High-efficiency, battery-powered supplies
• Buck (step-down) dc-to-dc converters
• Cellular telephones
• Laptop computers
• Hand-held instruments
• Battery Charger




Pinout

Connection Diagram




Specifications

Supply Voltage [100ms transient] (VIN) ..................... 18V
Output Switch Voltage (VSW) ..................................... 18V
Output Switch Current (ISW) ..................................... 6.0A
Enable, Output-Sense Voltage (VEN, VOUT) .................18V
Sync Voltage (VSYNC) ....................................................6V




Description

The Micrel MIC2177 is a 200kHz syn chro nous buck (step-down) switching regulator designed for high-efficiency, bat tery-powered applications.

The MIC2177 operates from a 4.5V to 16.5V input and features internal power MOSFETs that can supply up to 2.5A output current. It can operate with a max i mum duty cycle of 100% for use in low-dropout con di tions. MIC2177 also features a shut down mode that reduces qui es cent current to less than 5?A.

The MIC2177 achieves high efficiency over a wide output current range by switching between PWM and skip mode. Operating mode is automatically se lect ed ac cord ing to output conditions. Switching fre quen cy is pre set to 200kHz and can be syn chro nized to an external clock signal of up to 300kHz.

The MIC2177 uses current-mode control with internal cur rent sensing. Current-mode control provides su pe ri or line reg u la tion and makes the regulator control loop easy to com pen sate. The output is protected with pulse-by-pulse current limiting and thermal shutdown. Un der volt age lock out turns the output off when the input voltage is less than 4.5V.

The MIC2177 is packaged in a 20-lead wide power SO package with an operating temperature range of 40ºC to +85ºC.

See the MIC2178 for externally selected PWM or skip-mode operation.






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