MIC22405
The Micrel MIC22405 is a high efficiency, 4A integrated switch synchronous buck (step-down) regulator. The MIC22405 is optimized for highest efficiency, achieving more than 95% efficiency while still switching at 1MHz. The ultra-high speed control loop keeps the output voltage within regulation even under the extreme transient load swings commonly found in FPGAs and low-voltage ASICs. The output voltage is pre-bias safe and can be adjusted down to 0.7V to address all low-voltage power needs.
The MIC22405 offers a full range of sequencing and tracking options. The Enable/Delay (EN/DLY) pin, combined with the Power Good (PG) pin, allows multiple outputs to be sequenced in any way during turn-on and turn-off. The Ramp Control™ (RC) pin allows the device to be connected to another product in the MIC22xxx and/or MIC68xxx family, to keep the output voltages within a certain ∆V on start-up.
The MIC22405 is available in a 20-pin 3mm x 4mm MLF® with a junction operating range from -40°C to +125°C.
Features- Input voltage range: 2.9V to 5.5V
- Output voltage adjustable down to 0.7V
- Output load current up to 4A
- Safe start-up into a pre-biased output
- Full sequencing and tracking capability
- Power Good output
- Efficiency > 95% across a broad load range
- Programmable frequency 300kHz to 4MHz
- Ultra-fast transient response
- Easy RC compensation
- 100% maximum duty cycle
- Fully-integrated MOSFET switches
- Thermal shutdown and current-limit protection
- 20-pin 3mm x 4mm MLF®
- -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)
2.9
|
2.9
| |
Input Voltage Range Max (V)
5.5
|
5.5
| |
Output Voltage Range Min (V)
0.7
|
0.7
| |
Output Voltage Range Max (V)
5.5
|
5.5
| |
Output Current (A) max
4
|
4
| |
Quiescent Current (mA) typ
1.3
|
1.3
| |
Synchronous Rectifier
Yes
|
Yes
| |
Operating Temp Range
-40 to 125
|
-40 to 125
| |
Vfb (V)
0.7
|
0.7
| |
Duty Cycle Max (%)
1
|
1
| |
SHUTDOWN Current (µA) (Typ)
5
|
5
|
|
Documents
Ordering Information
| Part Number | Leads | Package Type | Temp Range | Packing | 1+ | 26+ | 100+ | 1000+ | 5000+ |
|---|
| MIC22405YML-TR | 20 | VQFN | -40C to +125C | T/R | 2.20 | 1.84 | 1.67 | 1.61 | 1.60 |
相关开发工具
RoHS Information
| PartNumber | DeviceWeight | ShippingWeight | LeadCount | PackageType | PackageWidth | SolderComposition | JEDECIndicator | RoHS | ChinaEFUP |
|---|
| MIC22405YML-TR | | 0.664302 | 20 | VQFN | 4x3x0.9mm | NiPdAu | e4 |  |  |
