MIC2101 _ BDTIC 中国领先电子元器件代理商

MIC2101

The Micrel MIC2101/02 are constant-frequency, synchronous buck controllers featuring a unique adaptive ON-time control architecture. The MIC2101/02 operates over an input supply range from 4.5V to 38V and can be used to supply up to 15A of output current. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%. The device operates with programmable switching frequency from 200kHz to 600kHz.

Micrel's Hyper Light Load™ architecture provides the same high-efficiency and ultra-fast transient response as the Hyper Speed Control architecture under the medium to heavy loads, but also maintains high efficiency under light load conditions by transitioning to variable frequency, discontinuous-mode operation.

The MIC2101/02 offers a full suite of protection features to ensure protection of the IC during fault conditions. These include under voltage lockout to ensure proper operation under power-sag conditions, internal soft-start to reduce inrush current, fold-back current limit, "hiccup" mode short circuit protection and thermal shutdown.

产品特性

Hyper Speed Control™ architecture enables
High delta V operation (V IN=38V and VOUT=1.2V)
Any Capacitor™ stable
4.5V to 38V input voltage
0.8V Reference Voltage with ±1% accuracy
200kHz to 600kHz, programmable switching frequency
Hyper Light Load Control (MIC2101 only)
Hyper Speed Control (MIC2102 only)
Enable input, Power-Good output
Built-in 5V regulator for single-supply operation
Programmable current limit and fold-back â€œhiccupâ€ mode short-circuit protection
5ms internal soft-start, internal compensation, and thermal shutdown
Supports safe start-up into a pre-biased output
-40°C to +125°C junction temperature range
Available in 16-pin 3mm x 3mm MLF® package

技术参数

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) 38	38
Minimum Output Voltage (V) 0.8	0.8
Maximum Output Voltage (V) 24	24
PFM, Discontinuous, Hyperlight load, or Skip Mode True	True
Typical Tolerance (%) ±1	±1
Duty Cycle Max (%) 0.85	0.85
Operating Frequency (Hz) 200K to 600K	200K to 600K
Power Good Signal True	True
Soft Start True	True
Internal Compensation 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) 0.4	0.4
Iq Off (µA) 0.1	0.1
Package 3x3 QFN	3x3 QFN

文档资料

MIC2101/02 - 38V, Synchronous Buck Controllers Featuring Adaptive On-Time Contro	Data Sheets	11/05/2015	1524KB
Micrel AN 87 - Putting Adaptive Constant-ON-Time Buck ICs and Modules to Work in Inverting Buck-Boost Converters	AppNote	10/02/2015	509KB
Micrel ANLPS207 - Putting Adaptive Constant-On-Time Buck ICs and Modules to Work in Inverting Buck-Boost Converters	AppNote	11/16/2015	509KB