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MC33063AD

MC33063AD Texas Instruments Power Management IC – Obsolete

MPNMC33063AD
Obsolete

Texas Instruments MC33063AD, adjustable buck/boost switching regulator, 1.5A switch, 100kHz, 8-SOIC (0.154", 3.90mm width), tube packaging.

$1.3800Ref. price · indicative, final on quote
Texas Instruments MC33063AD datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

MC33063AD specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Voltage - input40V
Voltage - output40V (Switch)
Voltage - output (Min (Fixed))1.25V
Output current1.5A (Switch)
Frequency - switching100kHz
I/O channels1
Operating temperature-40°C~85°C(TA)
PackageTube
FunctionStep-Up, Step-Down
TopologyBuck, Boost
Case8-SOIC (0.154\", 3.90mm Width)
Output configurationPositive or Negative
Synchronous rectifierNo

Product details

The MC33063AD: Availability is sourced per RFQ — no stock-holding claim, but the part can be quoted to order against the required quantity.

Buck-boost regulator with 1.5A switch and 100kHz switching

The MC33063AD is a step-up/step-down switching regulator with a 1.5A (switch) output current rating and a fixed 100kHz switching frequency. The 100kHz rate is low by modern standards — it keeps switching losses modest but demands larger magnetics than a 400kHz+ part would. Input voltage range spans 3V to 40V, covering 5V, 12V, and 24V industrial rails. The output is adjustable from 1.25V up to 40V, with positive or negative output configuration.

Industrial temperature range and layout considerations

The lack of synchronous rectification means the external Schottky diode carries the full load current — its forward drop and thermal dissipation must be accounted for in the layout.

Frequently asked questions

What is the maximum output current of MC33063AD?

The internal switch is rated for 1.5A. This is the peak switch current, not the continuous output current — the actual output depends on the topology (buck vs boost), input voltage, and inductor ripple. In a typical buck configuration, expect around 1A continuous output before the switch current limit is reached.

What is the switching frequency of MC33063AD?

The switching frequency is 100kHz. This is a fixed-frequency architecture — no frequency foldback or spread-spectrum. The 100kHz rate allows simple loop compensation but requires a larger inductor and output capacitor than a higher-frequency part.

Can MC33063AD be used in boost topology?

Yes, the device supports both buck and boost topologies. It can also be configured as a buck-boost (inverting) regulator. The output can be positive or negative, which makes it flexible for generating split rails from a single supply.