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MIC2169B

14.5V, 500 KHz, PWM Synchronous Buck Controller IC

Status: In Production

Features:

  • 3V to 14.5V input voltage range
  • Adjustable output voltage down to 0.8V
  • 500kHz PWM operation
  • Up to 95% efficiency
  • Output pre-biased protection
  • Built-in 2.2ω drivers to drive two N-Channel MOSFETs
  • Adaptive gate drive increases efficiency
  • Simple, externally-compensated voltage-mode PWM control
  • Short minimum ON time of 30ns allowing very low duty cycle
  • Fast transient response
  • Adjustable current limit senses high-side N-Channel MOSFET current
  • Hiccup mode short-circuit protection
  • No external current-sense resistor
  • Internal soft-start current source
  • Dual function COMP and EN pin allows low-power shutdown
  • Available in a small size 10-pin MSOP and 10-pin MSOP ePad package
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The MIC2169B is a high-efficiency, simple to use 500kHz PWM synchronous buck control IC housed in a small MSOP-10 ePad package. It allows compact DC/DC solutions with a minimal external component count and cost. The device features high output driver capability to drive loads up to 30A.

The MIC2169B 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 within the smallest possible printed circuit board space area.

The MIC2169B 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 MIC2169B is identical to the MIC2169A except it supports pre-bias loads. Internal pre-bias circuit prevents output voltage drooping and excessive reverse inductor current when powering up with a pre-bias voltage at the output.

The MIC2169B is available in a 10-pin MSOP and a thermally-capable 10-pin ePad MSOP package, with a wide junction operating range of -40°C to +125°C.

Additional Features
    • 3V to 14.5V input voltage range
    • Adjustable output voltage down to 0.8V
    • 500kHz PWM operation
    • Up to 95% efficiency
    • Output pre-biased protection
    • Built-in 2.2ω drivers to drive two N-Channel MOSFETs
    • Adaptive gate drive increases efficiency
    • Simple, externally-compensated voltage-mode PWM control
    • Short minimum ON time of 30ns allowing very low duty cycle
    • Fast transient response
    • Adjustable current limit senses high-side N-Channel MOSFET current
    • Hiccup mode short-circuit protection
    • No external current-sense resistor
    • Internal soft-start current source
    • Dual function COMP and EN pin allows low-power shutdown
    • Available in a small size 10-pin MSOP and 10-pin MSOP ePad package
Parametrics
Name
Value
Supported Topologies
Sync. Buck
Supported Outputs
1
Minimum Input Voltage (V)
3
Maximum Input Voltage (V)
14.5
Minimum Output Voltage (V)
0.8
Typical Tolerance (%)
±1
Duty Cycle Max (%)
0.92
Operating Frequency (Hz)
500K
Soft Start
True
Internal Voltage Bias
True
Enable Pin
True
Current Limit / Short Circuit Protection
True
Operating Supply Current (mA)
1.5
Iq Off (µA)
50
Package
10/MSOP

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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
MIC2169BYMM
0.024500
0.135600
10
MSOP
3x3x1.0mm
NiPdAu
e4
MIC2169BYMM-TR
0.024500
0.431180
10
MSOP
3x3x1.0mm
NiPdAu
e4
MIC2169BYMME
0.024800
0.135600
10
MSOP
3x3x1.0mm
Matte Tin
e3
MIC2169BYMME-TR
0.024800
0.206148
10
MSOP
3x3x1.0mm
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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