MIC2126
Micrel's MIC2125 and MIC2126 are constant-frequency synchronous buck controllers featuring a unique adaptive ON-time control architecture. The MIC2125/6 operates over an input voltage range from 4.5V to 28V and can be used to supply load current up to 25A . The output voltage is adjustable down to 0.6V with a guaranteed accuracy of ±1%. The device operates with programmable switching frequency from 200kHz to 650kHz.
Micrel's HyperLight Load® architecture provides the same high efficiency and ultra-fast transient response as the Hyper Speed Control® architecture under the medium to heavy loads. It also maintains high efficiency under light load conditions by transitioning to variable frequency, discontinuous conduction mode operation.
The MIC2125/6 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, "hiccup" mode short-circuit protection, and thermal shutdown.
Features- Hyper Speed Control® architecture enables:
- High delta-V operation (VIN = 28V and VOUT = 0.6V)
- Any Capacitor™ stable
- 4.5V to 28V input voltage
- Adjustable output voltage from 0.6V to 24V
- 200kHz to 650kHz programmable switching frequency
- HyperLight Load® (MIC2125)
- Hyper Speed Control® (MIC2126)
- Enable input and power good output
- Built-in 5V regulator for single-supply operation
- Programmable current limit and "hiccup" mode short-circuit protection
- 7ms internal soft-start, internal compensation, and thermal shutdown
- Supports safe start-up into a pre-biased output
- -40°C to +125°C junction temperature range
- Available in 16-pin 3mm x 3mm QFN package
| Parameter|
Parameter Name
Value
| Value | |
PFM, Discontinuous, Hyperlight load, or Skip Mode
False
|
False
| |
External Clock Sync
False
|
False
| |
Power Good Signal
False
|
False
| |
Soft Start
False
|
False
| |
Internal Compensation
False
|
False
| |
Internal Voltage Bias
False
|
False
| |
Enable Pin
False
|
False
| |
Current Limit / Short Circuit Protection
False
|
False
|
|
Documents
Ordering Information
| Part Number | Leads | Package Type | Temp Range | Packing | 1+ | 26+ | 100+ | 1000+ | 5000+ |
|---|
| MIC2126YML-T5 | 16 | VQFN | -40C to +85C | T/R | 2.59 | 2.15 | 1.96 | 1.63 | 1.51 |
| MIC2126YML-TR | 16 | VQFN | -40C to +85C | T/R | 1.52 | 1.27 | 1.15 | 1.11 | 1.10 |
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