MIC26603Z
The Micrel MIC26603-ZA is a constant-frequency, synchronous buck regulator featuring a unique adaptive ON-time control architecture. The MIC26603-ZA operates over an input supply range of 4.5V to 28V and provides a regulated output of up to 6A of output current. The output voltage is adjustable down to 0.6V with a guaranteed accuracy of ±1%, and the device operates at a switching frequency of 600kHz.
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 MIC26603-ZA offers a full suite of features to ensure protection of the IC during fault conditions. These include under voltage 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 = 0.6V)
- Small output capacitance
- 4.5V to 28V voltage input
- 6A output current capability, up to 95% efficiency
- Adjustable output voltage from 0.6V 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 short-circuit protection
- Supports safe startup into a pre-biased load
- -40°C to +125°C junction temperature range
- Available in 28-pin 5mm — 6mm QFN 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)
0.6
|
0.6
| |
Output Voltage Range Max (V)
5.5
|
5.5
| |
Output Current (A) max
6
|
6
| |
Quiescent Current (mA) typ
0.73
|
0.73
| |
Switching Frequency (kHz)
600
|
600
| |
Synchronous Rectifier
Yes
|
Yes
| |
Operating Temp Range
-40 to 125
|
-40 to 125
| |
Vfb (V)
0.6
|
0.6
| |
Duty Cycle Max (%)
0.82
|
0.82
| |
SHUTDOWN Current (µA) (Typ)
5
|
5
|
|
Documents
Ordering Information
| Part Number | Leads | Package Type | Temp Range | Packing | 1+ | 26+ | 100+ | 1000+ | 5000+ |
|---|
| MIC26603-ZYJL-TR | 28 | VQFN | -40C to +125C | T/R | 2.36 | 1.97 | 1.79 | 1.73 | 1.71 |
