TPSM81033VCDR 5.5V 2A Boost Power Module: Complete Selection & Design Guide

What Is the TPSM81033VCDR and Why Should Designers Care?

The TPSM81033VCDR is a Texas Instruments 5.5V, 2A synchronous boost power module that integrates a 0.43uH MagPack power inductor and power MOSFETs into a compact 2.6mm x 2.5mm QFN-FCMOD (9) package. It operates from a 1.8V to 5.5V input and delivers an adjustable 2.2V to 5.5V output, with a fixed 5.0V option when you tie FB to AVIN. Switching at a fixed 2.4MHz, it uses adaptive constant on-time valley-current-control and offers auto PFM or forced PWM light-load modes plus optional spread spectrum for EMI reduction. As of 2026-09-04, the part is in stock at XAIPART with 99,999 units available, an MOQ of 1, and pricing from $2.35 at qty 1 down to $1.42 at qty 1,000. The lifecycle status is active. Because the inductor, MOSFETs, and control are all integrated, only input and output capacitors plus optional feedback resistors are needed — a complete boost power stage in about 6.5 square millimeters of board area.

The synchronous rectifier architecture eliminates the external Schottky diode required by traditional boost designs, improving efficiency and cutting BOM count. Integrated protection includes 5.75V output overvoltage protection, output short-circuit protection, thermal shutdown, and a power good output for sequencing in multi-rail systems. Typical applications span battery-powered smart devices, IoT sensor nodes, TFT-LCD and OLED display bias, and portable audio rails.

How Do You Design In the TPSM81033VCDR? A Technical Guide

Input and Output Voltage Planning

Start by confirming your supply window. The TPSM81033 accepts 1.8V to 5.5V at the VIN pin, making it ideal for single-cell alkaline, NiMH, or Li-ion batteries whose voltage sags over discharge. The regulated output spans 2.2V to 5.5V adjustable, or a fixed 5.0V if you connect the FB pin directly to AVIN. For a 3.3V logic rail from a single Li-ion cell, or a 5V display rail from two alkaline cells, this range covers the requirement directly.

Output Voltage Setting

For fixed 5.0V operation — common in USB-accessory and display-bias designs — tie FB to AVIN. This removes the external feedback divider entirely, saving two resistors in cost-sensitive builds. For any adjustable output between 2.2V and 5.5V, use an external resistor divider on FB per the TI TPSM81033 datasheet recommended values.

MODE Pin Configuration: Efficiency vs. Noise

The MODE pin (pin 3) selects between two light-load behaviors. Auto PFM mode maximizes light-load efficiency — the right choice for battery-powered devices spending most of their life in sleep. Forced PWM mode holds the fixed 2.4MHz switching frequency at all loads, delivering lower output ripple and predictable EMI — the right choice for RF rails and audio supplies. Spread spectrum frequency modulation can also be enabled for additional EMI peak reduction.

Load Current Reality Check

The switch current limit is 2A (valley, typical). Because boost conversion draws more input current than it delivers, supported output current is roughly 1A depending on VIN, VOUT, and efficiency. Always verify your specific operating point against the datasheet inductor current limit curves before committing to a design. For several-hundred-milliwatt class-D amplifier rails or display bias loads from a single cell, this budget is comfortable.

External Components and Layout

Only input and output ceramic capacitors plus optional feedback resistors are required. The 2.4MHz switching frequency keeps these capacitors small. Place the input capacitor close to VIN and GND, keep the FB trace away from the switch node, and solder the exposed pad (pin 9, GND/thermal pad) to a solid ground plane — it provides both the ground return and heat spreading, allowing operation without heatsinking at typical accessory power levels. For a fixed 5V output, tie FB to AVIN per the datasheet layout guidelines.

Pin Configuration Summary

The 9-pin QFN-FCMOD pinout includes AVIN (pin 1), EN (pin 2), MODE (pin 3), FB (pin 4), PGOOD (pin 5), GND (pin 6), VOUT (pin 7), VIN (pin 8), and the exposed GND thermal pad (pin 9). The PGOOD output lets the host MCU detect loss of regulation and trigger safe shutdown in backup-power systems.

What Are the Alternatives to the TPSM81033VCDR?

There is no widely published pin-to-pin drop-in replacement for the TPSM81033 in its proprietary QFN-FCMOD (9) MagPack package. The only same-package option is the TPSM81033VCER reel variant of the identical die. Functionally similar TI boost converters require PCB rework. The table below compares only parts with verified data:

Parameter | TPSM81033VCDR | TPSM81033VCER | TPS61230 | TPS610981DSER
Architecture | Synchronous boost power module, integrated 0.43uH MagPack inductor | Same die, alternate reel packaging | Boost converter, external inductor | Ultra-low-power boost converter
Package/Pinout | QFN-FCMOD (9), 2.6mm x 2.5mm | Same package and pinout | Different package and pinout | Different package and pinout
Drop-in replacement? | — | Yes | No — PCB rework required | No — PCB rework required
Best for | Space-constrained integrated design | High-volume reel purchasing | Custom inductor values, BOM flexibility | Ultra-low-power applications

Choose the TPSM81033 when board space, design time, or EMI control is critical. Choose the TPS61230 if you need custom inductor values, lower BOM cost at high volume, or a different footprint. No cross-brand pin-compatible equivalent exists because the QFN-FCMOD (9) package with integrated MagPack inductor is proprietary to TI; any third-party substitution requires a PCB redesign.

What Is the Market Position and Supply Situation for the TPSM81033VCDR?

Per the XAIPART product database, the TPSM81033VCDR carries an active lifecycle status and is a current-generation TI power module. Stock stands at 99,999 units as of 2026-09-04 with an MOQ of 1, so prototype through mid-volume orders ship immediately. Pricing starts at $2.35 (qty 1), $2.11 (qty 10), $1.82 (qty 100), $1.58 (qty 500), and $1.42 (qty 1,000) as of 2026-09-04. [DATA_NEEDED: distributor lead times for high-volume production orders and manufacturer forecast/allocation status] — for production-scale commitments, verify allocation directly with TI or your distributor sales contact.

What Should Buyers Watch Next? Trends and Outlook

Watch three things anchored to verified specs. First, integration trend: the TPSM81033's MagPack approach — integrating a 0.43uH inductor with the power stage in 2.6mm x 2.5mm — reflects the industry push toward module-based power that removes magnetics selection and layout sensitivity; expect more designs to favor modules over discrete boost like the TPS61230 where footprint matters more than BOM cost. Second, EMI pressure: the combination of a fixed 2.4MHz switching frequency, forced PWM mode, and optional spread spectrum positions this part well as regulatory and coexistence demands on wireless IoT devices tighten; buyers specifying new RF-enabled sensor nodes should prefer forced PWM plus spread spectrum from the start. Third, sourcing: with active lifecycle status and deep stock at XAIPART as of 2026-09-04, near-term supply risk is low, but lock in tiered pricing ($1.42 at 1,000 units) for volume programs and monitor the TPSM81033VCER variant as your high-volume packaging option. Verify load current against the 2A valley switch current limit for each new VIN/VOUT operating point before finalizing BOMs.