MIC4742 _ BDTIC a Leading Distributor in China

MIC4742

The Micrel MIC4742 is a high efficiency dual PWM buck (step-down) regulator that provides dual 2A current output. The MIC4742 operates at 2MHz. A proprietary internal compensation technique allows a closed loop bandwidth of over 200kHz.

The low on-resistance internal P-channel MOSFET of the MIC4742 allows efficiencies over 92%, reduces external components count and eliminates the need for an expensive current sense resistor.

The MIC4742 operates from 2.9V to 5.5V input and the output can be adjusted down to 0.6V. The device can operate with a maximum duty cycle of 100% for use in low-dropout conditions.

The MIC4742 is available in the exposed pad 16-pin 3mm x 3mm MLF^® and ETSSOP-16 packages with a junction operating range from â€“40°C to +125°C.

Features

2.9V to 5.5V supply voltage
2MHz PWM mode
2A Dual output
Greater than 92% efficiency
100% maximum duty cycle
Adjustable output voltage option down to 0.6V
Ultra-fast transient response
Ultra-small external components Stable with a 1µH inductor and a 4.7µF output capacitor
Fully integrated 2A MOSFET switches
Micro-power shutdown
Thermal shutdown and current limit protection
Available in a 3mm x 3mm 16-pin MLF® and 16-pin TSSOP
-40°C to +125°C junction temperature range

Parameter

Parameter Name Value	Value
Regulator Type Step Down (Buck)	Step Down (Buck)
# of Outputs 2	2
Input Voltage Range Min (V) 2.9	2.9
Input Voltage Range Max (V) 5.5	5.5
Output Voltage Range Min (V) 0.6	0.6
Output Voltage Range Max (V) 5.5	5.5
Switching Frequency (kHz) 2000	2000
Operating Temp Range -40 to 125	-40 to 125
Vfb (V) 0.6	0.6
Duty Cycle Max (%) 1	1
SHUTDOWN Current (µA) (Typ) 1.6	1.6