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MP2125 2.7-6V, 1.5A, 1.2MHz Synchronous Step-Down Converter QFN14
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pMPS MP2125 — Synchronous Step-Down Converter, 2.7-6V input, 1.5 A output, QFN14./p
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MP2125 2.7-6V, 1.5A, 1.2MHz Synchronous Step-Down Converter QFN14
The MPS MP2125 is a Synchronous Step-Down Converter. It operates from a 2.7 V to 6 V input, is rated for 1.5 A and switches at 1.2 MHz. It is supplied in a QFN14 package.
The MP2125 is a fully integrated dual PWM step-down converter with built-in internal power MOSFETs.
Key Specifications
| Part Number | MP2125 |
| Function | Synchronous Step-Down Converter |
| Input Voltage | 2.7 V to 6 V |
| Current Rating | 1.5 A |
| Switching Frequency | 1.2 MHz |
| Interface | PWM |
| Peak Efficiency | 92% |
| Package | QFN14 |
| Ordering Codes | MP2125 |
Features
- 2.7V-6V Input Operation Range
- Each Output Adjustable from 0.8V to VIN
- 1uA Shutdown Current
- Up to 92% Efficiency
- 100% Duty Cycle for Low Dropout Applications
- Fixed 1.2MHz Frequency
- Stable with Low ESR Output Ceramic Capacitors
- Cycle-by-Cycle Over Current Protection
- Thermal Shutdown
- Short Circuit Protection
Typical Application Circuit
Applications
- Solid State Disk
- DVD+/-RW Drivers
- Smart Phones
- Digital Cameras
- Portable Instruments "MPS" and "The Future of Analog IC Technology" are Registered Trademarks of Monolithic Power Systems, Inc.
Design Notes
- Size the inductor for the ripple current at the actual switching frequency, typically 30% of the DC load — not for the DC rating alone.
- The hot loop from input capacitor through the switch to ground sets conducted EMI. Keep that copper area as small as the layout allows.
- Output ripple is set by the capacitor ESR and its DC-bias derating; a 10 µF ceramic often behaves like 4 µF at the rated output voltage.
- Route the feedback divider from the output capacitor terminals, away from the switch node.
Common Questions
What input voltage does the MP2125 support?
2.7 V to 6 V. The rated output is 1.5 A.
Which package and ordering codes apply to the MP2125?
QFN14; order codes include MP2125.
What are the defining features of the MP2125?
2.7V-6V Input Operation Range Each Output Adjustable from 0.8V to VIN
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