MIC2165 _ BDTIC a Leading Distributor in China

MIC2165

The Micrel MIC2165 is a synchronous adaptive on-time buck controller targeting high performance, cost sensitive applications such as set-top boxes, gateways, routers, computing peripherals, and telecom/networking equipment.

The MIC2165 operates over a supply range of 4.5V to 28V. It has an internal linear regulator which provides a regulated 5V supply to power the internal control circuitry. MIC2165 operates at a constant 600kHz switching frequency and can be used to drive up to 25A of output current. The output voltage is adjustable from 0.8V to 5.5V.

A unique Hyper Speed Control™ architecture enables ultra-fast transient response while reducing the output capacitance and also makes High V_IN/Low V_OUT operation possible.

A UVLO feature is provided to ensure proper operation under power-sag conditions to prevent the external power MOSFET from over heating. Also, a soft start feature is provided to reduce the inrush current. Short current sensing on the bottom MOSFET with hiccup mode operation ensures protection in case of an output short circuit. Further, the MIC2165 includes an EN pin to shut down the converter and a Power Good (PGOOD) pin to allow simple sequencing.

The MIC2165 is available in a 10-pin MSOP ePad package with a junction operating temperature range from -40°C to +125°C.

Features

Hyper Speed Control™ architecture enables
High VIN/Low VOUT operation (VIN=28V and VOUT=0.8V)
Smallest output capacitance
HyperLight Load® Efficiency
Built-in 5V regulator for single-supply operation
Any Capacitor™ stable
Zero ESR to high ESR
Power-Good output
Input voltage range: 4.5V to 28V
5 µA typical shutdown current
25A output current drive capability
Adjustable output from 0.8Vto 5.5V with ±1% FB Accuracy
600kHz switching frequency
Internal 5ms digital soft start
Thermal shutdown and "hiccup" current limit protection
No external current-sense resistor required
Safe start-up into pre-biased loads
10-pin MSOP ePad package
-40°C to +125°C junction temperature range

Parameter

Parameter Name Value	Value
Supported Topologies Sync. Buck	Sync. Buck
Supported Outputs 1	1
Minimum Input Voltage (V) 4.5	4.5
Maximum Input Voltage (V) 28	28
Minimum Output Voltage (V) 0.8	0.8
Maximum Output Voltage (V) 5.5	5.5
PFM, Discontinuous, Hyperlight load, or Skip Mode True	True
Typical Tolerance (%) ±1	±1
Duty Cycle Max (%) 0.82	0.82
Operating Frequency (Hz) 600K	600K
Power Good Signal True	True
Soft Start True	True
Internal Voltage Bias True	True
Enable Pin True	True
Current Limit / Short Circuit Protection True	True
Input UVLO Typ (V) 4.2	4.2
Operating Supply Current (mA) 0.45	0.45
Iq Off (µA) 5	5
Package 10/MSOP	10/MSOP