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Part Number: MIC2169

 

 

 

 

Description: The MIC2169 is a high-efficiency, simple to use 500kHz PWM synchronous buck control IC housed in a small MSOP- 10 packa...


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MIC2169 General Description


The MIC2169 is a high-efficiency, simple to use 500kHz PWM synchronous buck control IC housed in a small MSOP- 10 package. The MIC2169 allows compact DC/DC solutions with a minimal external component count and cost.

The MIC2169 operates from a 3V to 14.5V input, without the need of any additional bias voltage. The output voltage can be precisely regulated down to 0.8V. The adaptive all N-Channel MOSFET drive scheme allows efficiencies over
95% across a wide load range.

The MIC2169 senses current across the high-side N-Channel MOSFET, eliminating the need for an expensive and
lossy current-sense resistor. Current limit accuracy is maintained by a positive temperature coefficient that tracks the increasing RDS(ON) of the external MOSFET. Further cost and space are saved by the internal in-rush-current limiting
digital soft-start.

The MIC2169 is available in a 10-pin MSOP package, with a wide junction operating range of 40°C to +125°C.

All support documentation can be found on Micrel's web site at www.micrel.com.

MIC2169 Maximum Ratings

Supply Voltage (VIN) .................................................. 15.5V
Booststrapped Voltage (VBST) ............................... VIN +5V
Junction Temperature (TJ) ........... 40°C TJ +125°C
Storage Temperature (TS) .................. 65°C to +150°C

MIC2169 Features

• 3V to 14.5V input voltage range
• Adjustable output voltage down to 0.8V
• Up to 95% efficiency
• 500kHz PWM operation
• Adjustable current limit senses high-side N-Channel MOSFET current
• No external current-sense resistor
• Adaptive gate drive increases efficiency
• Ultra-fast response with hysteretic transient recovery mode
• Overvoltage protection protects the load in fault conditions
• Dual mode current limit speeds up recovery time
• Hiccup mode short-circuit protection
• Internal soft-start
• Dual function COMP and EN pin allows low-power shutdown
• Small size MSOP 10-lead package

MIC2169 Typical Application

• Point-of-load DC/DC conversion
• Set-top boxes
• Graphic cards
• LCD power supplies
• Telecom power supplies
• Networking power supplies
• Cable modems and routers

MIC2169 Connection Diagram

MIC2169 Connection Diagram

MIC2169 datasheet

MIC2169
PDF/DataSheet Download

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