1 A, 6 V, 1.5 MHz, Low IQ, COT Synchronous Step-Down Converter in 8-pin TSOT23

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The MP2159A is a monolithic step-down, switch-mode converter with built-in power MOSFETs. It achieves a 1 A continuous output current from a 2.5 V to 6 V input voltage range with excellent load and line regulation. The output voltage can be regulated as low as 0.6 V.

The constant-on-time (COT) control scheme provides fast transient response and eases loop stabilization. Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown.

The MP2159A is available in a small TSOT23-8 package and requires a minimum number of readily available, standard, external components.

The MP2159A is ideal for a wide range of applications including high-performance DSPs, FPGAs, PDAs, and portable instruments.

Symmetry Electronics is an authorized Monolithic Power Systems distributor.


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Very Low IQ: 17 A
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 m? and 90 m? Internal Power MOSFET Switches
Cycle-by-Cycle Over-Current Protection
Short-Circuit Protection with Hiccup Mode
Stable with Low ESR Output Ceramic Capacitors
Available in a TSOT23-8 Package


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Monolithic Power Systems Datasheet