MIC4744 Series

Dual 4 MHz 2A Buck Regulator

Catalog

Dual 4 MHz 2A Buck Regulator

Part	Number of Outputs	Frequency - Switching	Voltage - Output (Min/Fixed)	Output Configuration	Topology	Voltage - Output (Max) [Max]	Synchronous Rectifier	Mounting Type	Output Type	Supplier Device Package	Function	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Input (Max) [Max]	Voltage - Input (Min) [Min]	Package / Case [custom]	Package / Case	Package / Case [custom]	Current - Output
Microchip Technology MIC4744YTSE	2	4 MHz	0.6 V	Positive	Buck	5.5 V		Surface Mount	Adjustable	16-TSSOP-EP	Step-Down	-40 °C	125 ¯C	5.5 V	2.9 V	0.173 "	16-TSSOP Exposed Pad	4.4 mm	2 A
Microchip Technology MIC4744YTSE-TR	2	4 MHz	0.6 V	Positive	Buck	5.5 V		Surface Mount	Adjustable	16-TSSOP-EP	Step-Down	-40 °C	125 ¯C	5.5 V	2.9 V	0.173 "	16-TSSOP Exposed Pad	4.4 mm	2 A

Catalog

Dual 4 MHz 2A Buck Regulator

Key Features

• * 2.9V to 5.5V supply voltage

• * 4MHz PWM mode

• * 2A Dual output

• * Greater than 90% efficiency

• * 100% maximum duty cycle

• * Output voltage adjustable down to 0.6V

• * Ultra-fast transient response

• * Ultra-small external components

• Stable with a 0.47µH inductor and a 10µF output capacitor

• * Fully integrated 2A MOSFET switches

• * Micro-power shutdown

• * Thermal shutdown and current limit protection

• * -40°C to +125°C junction temperature range

Description

The MIC4744 is a high efficiency dual PWM buck (step-down) regulator that provides dual 2A current output. The MIC4744 operates at 4MHz. A proprietary internal compensation technique allows a closed loop bandwidth of over 200kHz. The low on-resistance internal P-Channel MOSFET of the MIC4744 allows efficiencies over 90%, reduces external components count and eliminates the need for an expensive current sense resistor. The MIC4744 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 MIC4744 is available in ETSSOP-16 packages with junction operating temperature ranging from -40°C to +125°C.