MIC4721
The Micrel MIC4721 is a high efficiency PWM buck (step-down) regulators that provides up to 1.5A of output current. The MIC4721 operates at 2MHz and has proprietary internal compensation that allows a closed loop bandwidth of over 200kHz.
The low on-resistance internal p-channel MOSFET of the MIC4721 allows efficiencies up to 94%, reduces external components count and eliminates the need for an expensive current sense resistor.
The MIC4721 operates from 2.7V to 5.5V input and the output can be adjusted down to 1V. The devices can operate with a maximum duty cycle of 100% for use in low-dropout conditions.
The MIC4721 is available in the 10-pin MSOP package with a junction operating range from -40°C to +125°C.
Features- 2.7V to 5.5V supply voltage
- 2MHz PWM mode
- Output current to 1.5A
- Up to 94% efficiency
- 100% maximum duty cycle
- Adjustable output voltage option down to 1V
- Ultra-fast transient response
- Stable with a 1µH inductor and a 4.7µF output capacitor
- Fully integrated 1.5A MOSFET switch
- Micropower shutdown
- Power Good pin
- Thermal shutdown and current limit protection
- Pb-free 10-pin MSOP package
- -40°C to +125°C junction temperature range
| Parameter|
Parameter Name
Value
| Value | |
Regulator Type
Step Down (Buck)
|
Step Down (Buck)
| |
# of Outputs
1
|
1
| |
Input Voltage Range Min (V)
2.7
|
2.7
| |
Input Voltage Range Max (V)
5.5
|
5.5
| |
Output Voltage Range Min (V)
1
|
1
| |
Output Voltage Range Max (V)
5.5
|
5.5
| |
Output Current (A) max
1
|
1
| |
Quiescent Current (mA) typ
0.57
|
0.57
| |
Switching Frequency (kHz)
2000
|
2000
| |
Operating Temp Range
-40 to 125
|
-40 to 125
| |
Vfb (V)
1
|
1
| |
Duty Cycle Max (%)
1
|
1
| |
SHUTDOWN Current (µA) (Typ)
2
|
2
|
|
Documents
Ordering Information
| Part Number | Leads | Package Type | Temp Range | Packing | 1+ | 26+ | 100+ | 1000+ | 5000+ |
|---|
| MIC4721YMM-TR | 10 | MSOP | -40C to +125C | T/R | 0.65 | 0.54 | 0.49 | 0.48 | 0.47 |
相关开发工具
RoHS Information
| PartNumber | DeviceWeight | ShippingWeight | LeadCount | PackageType | PackageWidth | SolderComposition | JEDECIndicator | RoHS | ChinaEFUP |
|---|
| MIC4721YMM-TR | 0.024500 | 0.431180 | 10 | MSOP | 3x3x1.0mm | NiPdAu | e4 |  |  |
| MIC4721YMM | 0.024500 | 0.135600 | 10 | MSOP | 3x3x1.0mm | NiPdAu | e4 | | |
