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MP28127 2.7-5.5V, 1.25A, 1.5MHz Synchronous Step-Down Switching Regulator QFN10
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pMPS MP28127 — Synchronous Step-Down Switching Regulator, 2.7-5.5V input, 1.25 A output, QFN10./p
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MP28127 2.7-5.5V, 1.25A, 1.5MHz Synchronous Step-Down Switching Regulator QFN10
The MPS MP28127 is a Synchronous Step-Down Switching Regulator. It operates from a 2.7 V to 5.5 V input, is rated for 1.25 A and switches at 1.5 MHz. It is supplied in a QFN10 package.
The MP28127 is an internally compensated 1.5MHz fixed frequency PWM synchronous step-down regulator.
Key Specifications
| Part Number | MP28127 |
| Function | Synchronous Step-Down Switching Regulator |
| Input Voltage | 2.7 V to 5.5 V |
| Current Rating | 1.25 A |
| Switching Frequency | 1.5 MHz |
| Interface | PWM |
| Package | QFN10 |
| Ordering Codes | MP28127 |
Features
- 1.25A Output Current
- Input Operation Range: 2.7V to 5.5V
- All Ceramic Capacitor Design
- 1.5MHz Fixed Switching Frequency
- Adjustable Output from 0.8V to 0.9xVIN
- Internal Soft-Start
- Frequency Synchronization Input
- Power Good Output
- Thermal Shutdown
- Cycle-by-Cycle Current Limiting
Typical Application Circuit
Applications
- µP/ASIC/DSP/FPGA Core and I/O Supplies
- Printers and LCD TVs
- Network and Telecom Equipment
- Point of Load Regulators "MPS" and "The Future of Analog IC Technology" are 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 MP28127 support?
2.7 V to 5.5 V. The rated output is 1.25 A.
Which package and ordering codes apply to the MP28127?
QFN10; order codes include MP28127.
What are the defining features of the MP28127?
1.25A Output Current Input Operation Range: 2.7V to 5.5V
Shenzhen Gaorunxin Technology Co., Ltd
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