Key facts
- Brand
- Micrel
- Model
- MIC5156
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-12
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Micrel MIC5156/5157/5158 Super LDO Regulator Controller Manual
The MIC5156, MIC5157, and MIC5158 are Super Low‑Dropout (LDO) regulator controllers that use an external N‑channel MOSFET as the pass element. They operate from 3 V to 36 V and offer fixed or programmable output voltages with optional current‑limit functionality.
The manual includes detailed pin configurations, electrical characteristics, typical performance graphs, and application notes such as MOSFET selection, circuit layout, current‑limiting design, and examples for battery chargers, UPS supplies, and high‑current switching.
Micrel MIC5156 specifications
| Operating Supply Voltage Range | 3V to 36V |
|---|---|
| Typical Operating Current (MIC5156) | 4.5mA |
| Typical Standby Current | <1µA |
| Current Limit Threshold | 35mV |
| Initial Output Voltage Tolerance | 1% |
| Output Voltage Tolerance (Over Temp) | 2% |
| Shutdown Supply Current | <11µA |
Source: Micrel MIC5156/5157/5158 Super LDO Regulator Controller Datasheet
All Micrel MIC5156 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the dropout voltage of these regulators?
The dropout voltage is as low as the Rds(on) of the external power MOSFET multiplied by the output current.
From: Micrel MIC5156/5157/5158 Super LDO Regulator Controller Datasheet
Do MIC5157 and MIC5158 require an external gate drive supply?
No, they each have an internal charge pump tripler to produce the gate drive voltage.
From: Micrel MIC5156/5157/5158 Super LDO Regulator Controller Datasheet
What is the operating voltage range of the MIC5156/5157/5158 controllers?
They operate from 3 V to 36 V.
From: Micrel MIC5156/5157/5158 Super LDO Regulator Controller Manual
How is shutdown mode activated?
Applying a TTL low to the EN pin places the controller in shutdown mode, reducing supply current to less than 1 µA.
From: Micrel MIC5156/5157/5158 Super LDO Regulator Controller Manual