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MP2159A 2.5-6V, 1A, 1.5MHz Synchronous Step-Down Converter TSOT23
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pMPS MP2159A — synchronous step-down converter, 2.5-6V input, 1A output, 1.5 MHz, TSOT23./p
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MP2159A 2.5-6V, 1A, 1.5MHz Synchronous Step-Down Converter TSOT23
MPS MP2159A is a synchronous step-down converter that accepts 2.5 V to 6 V input, delivers 1 A, switches at 1.5 MHz, supplied in a TSOT23 package.
Key Specifications
| Part Number | MP2159A |
| Input Voltage | 2.5 V to 6 V |
| Output Current | 1 A |
| Switching Frequency | 1.5 MHz |
| Topology | Synchronous Step-Down Converter |
| Package | TSOT23 |
| Ordering Codes | MP2159A |
Features
- Very Low IQ: 17 μA
- Default 1.5 MHz Switching Frequency
- 1.5% VFB Accuracy
- EN and Power Good for Power Sequencing
- Wide 2.5 V to 6 V Operating Input Range
- Output Adjustable from 0.6 V
- Up to 1 A Output Current
- 100% Duty Cycle in Dropout
- 120 mΩ and 90 mΩ Internal Power MOSFET Switches
- Cycle-by-Cycle Over-Current Protection
Applications
- Wireless/Networking Cards
- Portable Instruments
- Battery Powered Devices
Design Notes
- The step-down topology needs an inductor and output capacitor sized for the ripple at the switching frequency, not just the DC load.
- Keep the input loop short — high di/dt at the switch node sets conducted EMI.
- Power switches are integrated, so the thermal path is the PCB copper under the pad.
- Package TSOT23 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the MP2159A?
2.5–6 V input and 1 A output.
What switching frequency does the MP2159A run at?
1.5 MHz.
Which package is the MP2159A available in?
TSOT23.
Shenzhen Gaorunxin Technology Co., Ltd
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