MIC26950
The Micrel MIC26950 is a constant-frequency, synchronous buck regulator featuring a unique digitally modified adaptive ON-time control architecture. The MIC26950 operates over an input supply range of 4.5V to 26V and provides a regulated output at up to 12A of output current. The output voltage is adjustable down to 0.8V with a typical accuracy of ±1%, and the device operates at a switching frequency of 300kHz.
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 digitally modified adaptive tON ripple control architecture combines the advantages of fixed-frequency operation and fast transient response in a single device.
The MIC26950 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, fold-back current limit, "hiccup" mode short-circuit protection and thermal shutdown.
Features- Hyper Speed Control™ architecture enables
- High delta V operation (VIN = 26V and VOUT = 0.8V)
- Small output capacitance
- 4.5V to 26V input voltage
- Adjustable output from 0.8V to 5.5V (±1% accuracy)
- Any Capacitor™ Stable
- Zero ESR to high-ESR output capacitance
- 12A output current capability
- 300kHz switching frequency
- Internal compensation
- Up to 95% efficiency
- 6ms Internal soft-start
- Foldback current-limit and "hiccup" mode short-circuit protection
- Thermal shutdown
- Supports safe start-up 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)
26
|
26
| |
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
1.4
|
1.4
| |
Switching Frequency (kHz)
300
|
300
| |
Synchronous Rectifier
Yes
|
Yes
| |
Operating Temp Range
-40 to 125
|
-40 to 125
| |
Vfb (V)
0.8
|
0.8
| |
Duty Cycle Max (%)
0.87
|
0.87
| |
SHUTDOWN Current (µA) (Typ)
700
|
700
|
|
Documents
Ordering Information
| Part Number | Leads | Package Type | Temp Range | Packing | 1+ | 26+ | 100+ | 1000+ | 5000+ |
|---|
| MIC26950YJL-TR | 28 | VQFN | -40C to +125C | T/R | 2.38 | 1.98 | 1.80 | 1.74 | 1.72 |
RoHS Information
| PartNumber | DeviceWeight | ShippingWeight | LeadCount | PackageType | PackageWidth | SolderComposition | JEDECIndicator | RoHS | ChinaEFUP |
|---|
| MIC26950YJL-TR | 0.081600 | 0.227180 | 28 | VQFN | 5x6x0.9mm | NiPdAu | e4 |  |  |
