MIC2198 _ BDTIC 中国领先电子元器件代理商

MIC2198

The MIC2198 is a high power 500kHz synchronous buck DC-to-DC controller housed in a small 4mm x 4mm MLF^® 12-lead package. The MIC2198 operates from a wide 4.5V to 32V input and can be programmed for output voltages from 0.8V to 6V. The wide input voltage capability makes the MIC2198 an ideal solution for point-of-load DC-to-DC conversion in 5V, 12V and higher systems.

The 500kHz switching frequency allows the use of a small inductor and small output capacitors. The current mode PWM control along with the external COMP pin allows for ease of stability compensation and fast transient response across a wide range of applications.

An all N-Channel synchronous architecture and powerful output drivers allow up to 20A of output current capability.

For higher efficiency at higher input voltages, refer to the 300kHz MIC2199.

The MIC2198 is available in a 12-pin 4mm x 4mm MLF^® package with a junction temperature range from -40°C to 125°C.

产品特性

4.5V to 32V input range
4mm x 4mm MLF® package
500kHz PWM operation
>90% efficiency
Output voltage adjustable down to 0.8V
20A output current capability
Drives all N-Channel MOSFETs
Logic controlled micropower shutdown
Cycle-by-cycle current limiting
Adjustable undervoltage lockout
Frequency foldback overcurrent protection

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) 32	32
Minimum Output Voltage (V) 0.8	0.8
Maximum Output Voltage (V) 6	6
Typical Tolerance (%) ±1	±1
Duty Cycle Max (%) 0.76	0.76
Operating Frequency (Hz) 500K	500K
Internal Voltage Bias True	True
Enable Pin True	True
Current Limit / Short Circuit Protection True	True
Operating Supply Current (mA) 3.5	3.5
Iq Off (µA) 0.1	0.1
Package 12/4x4 MLF	12/4x4 MLF