MIC2169A _ BDTIC a Leading Distributor in China

MIC2169A

The MIC2169A is a high-efficiency, simple to use 500kHz PWM synchronous buck control IC housed in a small MSOP-10 package. The MIC2169A allows compact DC/DC solutions with a minimal external component count and cost.

The MIC2169A 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 Nâ€‘Channel MOSFET drive scheme allows efficiencies over 95% across a wide load range.

The MIC2169A 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 R_DS(ON) of the external MOSFET. Further cost and space are saved by the internal in-rush-current limiting digital soft-start.

The MIC2169A is available in a 10-pin MSOP package, with a wide junction operating range of -40°C to +125°C.

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
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

Parameter

Parameter Name Value	Value
Supported Topologies Sync. Buck	Sync. Buck
Supported Outputs 1	1
Minimum Input Voltage (V) 3	3
Maximum Input Voltage (V) 14.5	14.5
Minimum Output Voltage (V) 0.8	0.8
Typical Tolerance (%) ±1	±1
Duty Cycle Max (%) 0.92	0.92
Operating Frequency (Hz) 500K	500K
Soft Start True	True
Internal Voltage Bias True	True
Enable Pin True	True
Current Limit / Short Circuit Protection True	True
Operating Supply Current (mA) 1.5	1.5
Iq Off (µA) 50	50
Package 10/MSOP	10/MSOP