TPS65135 - DC-DC bipolar power supply with one inductor. Free Technical Library News

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TPS65135 - DC-DC bipolar power supply with one choke

03.11.2016

The TPS65135 is a high performance buck-boost converter that generates positive and negative voltage with a single inductor.

The buck-boost topology of the TPS65135 can generate output voltages that are above or below the input supply voltage: -7 to 6 V (80 mA) at an input voltage of 2,5 to 5,5 V.

The device uses a Single Inductance Multiple Output (SIMO) topology, which reduces the number of external components. The SIMO topology achieves excellent regulation performance to prevent voltage fluctuations when an additional load is switched on.

The TPS65135 has excellent transient response and buck-boost response.

High efficiency over the entire load range is maintained by reducing the switching frequency at low load. At the same time, the "Out-of-audio" mode prevents the switching frequency from decreasing to the region of the audible audio range below 20 kHz.

The built-in UVLO function disables the inverter if the input supply voltage is too low for normal operation (<2,5V).

Features of TPS65135:

Topology with one inductance and several outputs;
Input voltage from 2,5 to 5,5 V;
Output power 750 mW at 2,9 V input;
Output positive voltage up to 6 V;
Output negative voltage up to -7 V;
Output voltage accuracy 1%;
Output current mismatch up to 50% is allowed;
High efficiency energy-saving mode at low loads;
Low noise operation;
"Out-of-Audio" mode;
Short circuit protection;
Overheat protection;
Compact QFN package (3x3 mm).

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