TPSM81033VCDR - 5.5V 2A Boost Power Module | Texas Instruments
MPN: TPSM81033VCDR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.35 | $2.35 |
| 10 | $2.11 | $21.10 |
| 100 | $1.82 | $182.00 |
| 500 | $1.58 | $790.00 |
| 1,000 | $1.42 | $1,420.00 |
TPSM81033VCDR Overview
A boost converter is a DC-DC switching regulator that steps an input voltage up to a higher output voltage. It is essential in battery-powered systems where cell voltage falls below the required rail. The TPSM81033 belongs to the power module family within power management ICs, integrating the magnetic component and power stage to reduce design effort and board space versus discrete solutions.
Key features include a 2A valley switching current limit, fixed 2.4MHz switching frequency for small external components and low ripple, and an integrated 0.43uH inductor with excellent thermal performance. Adaptive constant on-time valley-current-control topology regulates the output, while two light-load modes (auto PFM and forced PWM) selected via the MODE pin balance efficiency and noise immunity. Optional spread spectrum frequency modulation minimizes EMI.
The synchronous rectifier architecture eliminates the external Schottky diode, improving efficiency, and the integrated inductor reduces parasitic losses and radiated EMI. Only input and output capacitors plus feedback resistors are required. Protection features include 5.75V output overvoltage protection, output short-circuit protection, thermal shutdown, and a power good output for sequencing in multi-rail systems.
Typical applications include smart devices and portable equipment powered by batteries, IoT sensor power supplies, and TFT-LCD bias or OLED display rails. The wide input range and high switching frequency suit space-constrained designs.
Design tip: ensure adequate input and output capacitance for stability and low ripple, and use the MODE pin to trade efficiency against noise. For a fixed 5V output, tie FB to AVIN per the datasheet layout guidelines.
Drop-in alternatives for TPSM81033VCDR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPSM81033VCER
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPSM81033VCDR Maximum Ratings & Electrical Characteristics
| Topology | Synchronous Boost |
| Input Voltage Range | 1.8 V to 5.5 V |
| Output Voltage Range | 2.2 V to 5.5 V (fixed 5.0V with FB to AVIN) |
| Switch Current Limit | 2 A (valley, typical) |
| Switching Frequency | 2.4 MHz |
| Integrated Inductor | 0.43 uH (MagPack) |
| Control Topology | Adaptive constant on-time valley-current-control |
| Light Load Modes | Auto PFM / Forced PWM (MODE pin) |
| Spread Spectrum | Optional |
| Output OVP Threshold | 5.75 V |
| Protection | OVP, short-circuit, thermal shutdown, power good |
| Package | QFN-FCMOD (9), 2.6 mm x 2.5 mm |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Applications | Smart devices, portable equipment, battery-powered systems |
TPSM81033VCDR Pin Configuration
| Pin 1 | AVIN — Analog input supply; FB tied here selects fixed 5.0V output |
| Pin 2 | EN — Enable control input |
| Pin 3 | MODE — Light-load mode select: auto PFM or forced PWM |
| Pin 4 | FB — Feedback input; connect to AVIN for fixed 5.0V output |
| Pin 5 | PGOOD — Power good status output |
| Pin 6 | GND — Ground |
| Pin 7 | VOUT — Boosted output voltage |
| Pin 8 | VIN — Power stage input supply (1.8V to 5.5V) |
| Pin 9 | GND (thermal pad) — Exposed ground/thermal pad |
Typical Applications
TPSM81033VCDR is suitable for 6 applications: Battery-Powered Smart Devices, Portable IoT Sensor Nodes, TFT-LCD and OLED Display Bias, Portable Audio Power Supply, Battery Backup for Industrial Sensing, USB Accessory and Charging Accessories.
Battery-Powered Smart Devices
The TPSM81033 fits smart devices powered by single-cell batteries because its 1.8V to 5.5V input tolerates deep battery discharge while still delivering a regulated 2.2V to 5.5V rail. Auto PFM mode sustains high efficiency at the microamp-to-milliamp sleep loads typical of wearables and smart tags, extending battery life. The fully integrated 0.43uH MagPack inductor in a 2.6mm x 2.5mm QFN-FCMOD package lets designers place the complete power stage beside the battery connector with only input and output capacitors, and the power good flag simplifies system reset sequencing.
Recommended
Portable IoT Sensor Nodes
IoT sensor nodes spend most of their life in sleep, so light-load efficiency dominates energy budgets. The TPSM81033's auto PFM mode minimizes quiescent overhead during sleep, while forced PWM via the MODE pin gives clean fixed-frequency rails during radio transmit bursts, protecting RF phase noise. Its 2.4MHz switching keeps the switching harmonics out of common sub-GHz and 2.4GHz receive bands, and the optional spread spectrum further reduces EMI peaks. The integrated inductor removes magnetics selection and layout tuning, accelerating compact sensor PCB designs.
Recommended
TFT-LCD and OLED Display Bias
Small displays in portable products need a stable 3.3V to 5V logic and analog rail generated from a single Li-ion cell or two alkaline cells. The TPSM81033's adjustable 2.2V to 5.5V output and fixed 5.0V option (FB tied to AVIN) cover these rails directly. Forced PWM mode keeps switching frequency constant at 2.4MHz so display flicker and visible ripple are minimized under varying brightness loads. The 5.75V output overvoltage protection guards the display panel against feedback faults, and the 2.6mm x 2.5mm module fits behind the display flex connector.
Recommended
Portable Audio Power Supply
Portable audio codecs and amplifier stages demand low supply noise to preserve dynamic range. The TPSM81033 operated in forced PWM at 2.4MHz provides a fixed-frequency rail well above the audio band, and spread spectrum modulation reduces narrow-band EMI that could couple into high-impedance analog nodes. With a 2A valley current limit it supports several-hundred-milliwatt class-D amplifier rails from a single cell. Placing this module near the battery and following it with a low-noise LDO yields an audiophile-grade supply in minimal board area.
Recommended
Battery Backup for Industrial Sensing
Industrial sensors and meters must ride through mains outages on a small backup cell. The TPSM81033 converts the 1.8V to 5.5V cell voltage into the system's 3.3V or 5V logic rail with high efficiency, and the power good output lets the host MCU detect loss of regulation and enter safe shutdown. Protection features including short-circuit protection, 5.75V OVP, and thermal shutdown ensure robust behavior in unattended installations. The integrated-inductor module reduces qualification effort versus discrete designs in conformally coated, space-limited enclosures.
Recommended
USB Accessory and Charging Accessories
Battery-powered accessories such as earbud cases, tracking tags, and small chargers need to boost one or two cells to a 5V-class rail. The TPSM81033's 5.5V maximum output and 2A valley current limit cover this range, and the 5.0V fixed option via FB-to-AVIN removes feedback resistors from cost-sensitive designs. At 2.4MHz switching, ceramic capacitors stay small, and the QFN-FCMOD thermal pad allows operation without heatsinking at typical accessory power levels. Protection circuits guard against output shorts from connectors and cables.
Recommended
Recommended Products Summary
Engineering reference data for TPSM81033VCDR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPSM81033VCER | TPS61230 | TPS610981 |
|---|---|---|---|---|
| Package | QFN-FCMOD (9) 2.6mm x 2.5mm | QFN-FCMOD (9) - same | Different package - PCB rework | Different package - PCB rework |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Integrated Inductor | 0.43 uH MagPack | 0.43 uH MagPack | External inductor required | External inductor required |
Key Differentiators
- Fully integrated MagPack inductor (vs TPS61230)
- Selectable PFM/PWM light-load operation (vs TPS610981)
- Synchronous rectification (vs Asynchronous boost alternatives)
Design Notes
Place the input capacitor (recommended 10uF ceramic, datasheet value) within 2mm of the VIN pin and the output capacitor close to VOUT. Because the inductor is integrated, loop area is already minimized inside the package; remaining EMI depends on tight external cap placement and a solid ground connection to the exposed pad. Refer to the TPSM81033 datasheet layout section for the reference layout.
Enable spread spectrum modulation when the design must pass conducted emissions testing near sensitive RF receivers. If lowest ripple is required instead, use forced PWM via the MODE pin and accept reduced light-load efficiency. The 2.4MHz switching frequency places harmonics above many IF bands, but verify with a near-field probe on the final layout.
Do not exceed the 5.5V maximum input; a fully charged supply with transients can exceed this. For adjustable outputs, use 1%-tolerance feedback resistors per datasheet equations. The valley current limit of 2A means available load current depends on boost ratio - check the datasheet thermal and current-limit curves at your minimum VIN before finalizing the load budget.
Compliance Information
RoHS compliance per TI product listing; other compliance attributes not stated in provided data.
