MIC261201
The Micrel MIC261201 is a constant-frequency, synchronous buck regulator featuring a unique adaptive on-time control architecture. The MIC261201 operates over an input supply range of 4.5V to 28V and provides a regulated output of up to 12A of output current. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%, and the device operates at a switching frequency of 600kHz.
Micrel’s Hyper Speed Control™ architecture allows for ultra-fast transient response while reducing the output capacitance and also makes (High VIN)/(Low VOUT) operation possible. This adaptive tON ripple control architecture combines the advantages of fixed-frequency operation and fast transient response in a single device.
The MIC261201 offers a full suite of protection features to ensure protection of the IC during fault conditions. These include undervoltage lockout to ensure proper operation under power-sag conditions, internal soft-start to reduce inrush current, foldback current limit, “hiccup mode†short-circuit protection and thermal shutdown. An open-drain Power Good (PG) pin is provided.
Features- Hyper Speed Control™ architecture enables
- High delta V operation (VIN = 28V and VOUT = 0.8V)
- Small output capacitance
- 4.5V to 28V voltage input
- 12A output current capability, up to 95% efficiency
- Adjustable output from 0.8V to 5.5V
- ±1% feedback accuracy
- Any Capacitor® stable - zero-to-high ESR
- 600kHz switching frequency
- No external compensation
- Power Good (PG) output
- Foldback current-limit and "hiccup" mode short-circuit protection
- Supports safe startup into a pre-biased load
- -40°C to +125°C junction temperature range
- 28-pin 5mm x 6mm MLF® package
| Parameter|
Parameter Name
Value
| Value | |
Regulator Type
Step Down (Buck)
|
Step Down (Buck)
| |
# of Outputs
1
|
1
| |
Input Voltage Range Min (V)
4.5
|
4.5
| |
Input Voltage Range Max (V)
28
|
28
| |
Output Voltage Range Min (V)
0.8
|
0.8
| |
Output Voltage Range Max (V)
5.5
|
5.5
| |
Output Current (A) max
12
|
12
| |
Quiescent Current (mA) typ
0.45
|
0.45
| |
Switching Frequency (kHz)
600
|
600
| |
Synchronous Rectifier
Yes
|
Yes
| |
Operating Temp Range
-40 to 125
|
-40 to 125
| |
Vfb (V)
0.8
|
0.8
| |
Duty Cycle Max (%)
0.82
|
0.82
| |
SHUTDOWN Current (µA) (Typ)
5
|
5
|
|
Documents
RoHS Information
| PartNumber | DeviceWeight | ShippingWeight | LeadCount | PackageType | PackageWidth | SolderComposition | JEDECIndicator | RoHS | ChinaEFUP |
|---|
| MIC261201YJL-TR | 0.081600 | 0.227180 | 28 | VQFN | 5x6x0.9mm | NiPdAu | e4 |  |  |
