Voltage regulator chip roundup

McZ and rsdio tipped us to a bunch of new and wonderful voltage regulator chips. Tiny regulators, high current regulators, and high voltage regulators.

  • TPS84620: 4.5V to 14.5V input, 6A switching regulator needs only three external parts
  • MAX15040: 2.4V to 3.6V input, 4A switching regulator is the smallest yet
  • MAX15050/MAX15051: 2.9V to 5.5V input, 4A switching regulator
  • TPS7A4001 100V input, 50mA very high voltage linear regulator

Details follow below the fold.

TPS84620 4.5V to 14.5V input, 6A switching regulator needs only three external parts, datasheet:

The TPS84620RUQ is an easy-to-use integrated power solution that combines a 6-A DC/DC converter with power MOSFETs, an inductor, and passives into a low profile, BQFN package. This total power solution allows as few as 3 external components and eliminates the loop compensation and magnetics part selection process.

The 9×15×2.8 mm BQFN package is easy to solder onto a printed circuit board and allows a compact point-of-load design with greater than 90% efficiency and excellent power dissipation with a thermal impedance of 13°C/W junction to ambient. The device delivers the full 6-A rated output current at 85°C ambient temperature without airflow.

The TPS84620 offers the flexibility and the feature-set of a discrete point-of-load design and is ideal for powering performance DSPs and FPGAs.

Next up we have a pair of tiny switching regulators with an impressive 4A output. MAX15040: 2.4V to 3.6V input, 4A switching regulator:

MAX15040, a low-voltage (2.4V to 3.6V), synchronous switching regulator in a 2mm x 2mm wafer-level package (WLP). This miniature step-down regulator integrates MOSFETs to simplify design, minimize EMI, improve reliability, and save board space. The MAX15040 operates from a fixed 1MHz switching frequency to further reduce total solution size, as it allows all-ceramic-capacitor designs. Offering efficiencies up to 94% at full load current (4A), this point-of-load regulator minimizes power loss in applications such as telecom, networking, and server equipment.

Here’s a higher-voltage version. MAX15050/MAX15051: 2.9V to 5.5V input, 4A switching regulator:

MAX15050/MAX15051, low-voltage (2.9V to 5.5V), 4A, synchronous DC-DC regulators in a 2mm x 2mm wafer-level package (WLP). These tiny step-down regulators integrate MOSFETs to simplify design, minimize EMI, and save board space. Operation from a fixed 1MHz switching frequency further reduces total solution size, allowing all-ceramic-capacitor designs. Offering peak efficiencies up to 96%, these point-of-load converters minimize power losses in applications ranging from portable devices to networking equipment.

Finally, a high voltage regulator from TI. TPS7A4001 100V input, 50mA, very high voltage linear regulator, datasheet:

• Wide Input Voltage Range: 7V to 100V
• Maximum Output Current: 50mA
• CMOS Logic-Level-Compatible Enable Pin
• Adjustable Output Voltage from ~1.175V to 90V
• Stable with Ceramic Capacitors:
– Input Capacitance: ≥ 1μF
– Output Capacitance: ≥ 4.7μF
• Dropout Voltage: 290mV
• Built-In Current-Limit and Thermal Shutdown Protection
• Package: High Thermal Performance MSOP-8 PowerPAD

Thanks rsdio & MichaelZ!

Join the Conversation


  1. 1. TPS84620:

    This is an interesting part, but only for a small operating range of interest. This part gets really inefficient at low output currents, and that situation only gets worse fast with higher input voltages.

    The part is in a difficult to mount package with several thermal pads underneath.

    At around $16 a part in unit quantity, the low parts-count advantage is nullified.

    2. MAX15040:

    Forget about actually buying one of these.

    3. MAX15050/51:

    Forget about actually buying one of these.

    4. TPS7A4001:

    This is an interesting part. A 50mA LDO with input tolerance to 100VDC. Maybe power something from a POTS phone line? There’s an interesting LED driver circuit shown in the datasheet’s application section.

    Low ESR caps (~10uF) are required on the input and output. I would put a bypass cap on it too.

    The 3mmx5mm DGN PowerPAD package has a thermal pad on the bottom. But it should be solderable with hot air.

    The TPS7A4001 costs around $5.70 but appears very difficult to find OTS.

  2. I am looking for a simple solution with a buck/boost/repic/Cyk regulator that takes input of 4V-6V (from 4 AA cells) and outputs 5V. Preferably through hole. A lot of the ICs I’ve found seem to be only buck or boost but not both. Do you guys have any suggestions for me?

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