Part A
TPS71933-33DRVR
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 6568 PCS
- Package
- WSON-6
- Series
- PMIC - Voltage Regulators - Linear
Replacement verdict
Compatible functional replacement candidate
The TPS71933-33DRVR and TPS717185DSER are both fixed-output low-dropout linear regulators from Texas Instruments in the same 6-pin WSON package, sharing comparable current capability and a wide operating temperature range. However, they differ in fixed output voltage and dropout voltage characteristics, so the TPS717185DSER can serve as a functional replacement for the TPS71933-33DRVR only when the 1.85 V output rail and associated dropout performance are acceptable for the target application.
Output Voltage
Validation required
Package Type
High match
Current Rating
High match
Dropout Voltage
Validation required
Parts at a glance
Part B
TPS717185DSER
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 3208 PCS
- Package
- WSON-6
- Series
- PMIC - Voltage Regulators - Linear
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | TPS71933-33DRVR | TPS717185DSER | Why it matters |
|---|---|---|---|
| Output Voltage | 3.3 V (fixed) | 1.85 V (fixed) | The regulated output voltage must match the target rail; a 3.3 V and 1.85 V LDO are not directly substitutable for the same load. |
| Output Current (Max) | 250 mA | 150 mA | Maximum load current determines whether the LDO can supply the downstream circuit without entering current limit or overheating. |
| Input Voltage Range | 2.7 V to 6.5 V | 2.5 V to 6.5 V | The input range must cover the available supply rail with margin for dropout and transient variation. |
| Dropout Voltage (Typical) | 230 mV at 250 mA | 170 mV at 150 mA | Lower dropout allows operation from a supply closer to the output voltage, affecting headroom and efficiency. |
| Quiescent Current (Typical) | 55 µA | 45 µA | Quiescent current impacts standby power consumption, which is critical in battery-powered and always-on designs. |
| Package | 6-pin WSON (DRV) | 6-pin WSON (DSE) | Package footprint and pinout must match the PCB layout for a drop-in replacement; different suffixes may indicate different thermal or pin configurations. |
| PSRR at 1 kHz (Typical) | 70 dB | 70 dB | Power supply rejection ratio determines how well the LDO filters input ripple, affecting noise-sensitive analog and RF loads. |
| Output Noise (Typical) | 28 µV RMS | 30 µV RMS | Output noise directly affects the spectral purity of the regulated rail, important for precision analog and RF circuits. |
| Enable / Shutdown | Yes (active-high enable) | Yes (active-high enable) | Enable functionality allows power sequencing and shutdown control, which is essential for multi-rail systems. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | The junction temperature range must cover the application's ambient and self-heating conditions for reliable operation. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | TPS71933-33DRVR | TPS717185DSER |
|---|---|---|
| Part Status | Active | Active |
| Output Configuration | Positive | Positive |
| Output Type | Fixed | Fixed |
| Number of Regulators | 2 | 1 |
| Voltage - Input (Max) | 6.5V | 6.5V |
| Voltage - Output (Min/Fixed) | 3.3V | 1.85V |
| Voltage Dropout (Max) | 0.4V @ 200mA | 0.3V @ 150mA |
| Current - Output | 200mA | 150mA |
| Current - Quiescent (Iq) | 160 µA | 80 µA |
| Current - Supply (Max) | 250 µA | 100 µA |
| PSRR | 63dB ~ 44dB (100Hz ~ 1MHz) | 70dB ~ 45dB (100Hz ~ 1MHz) |
| Control Features | Enable | Enable |
| Protection Features | Over Current, Over Temperature, Under Voltage Lockout (UVLO) | Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO) |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the TPS71933-33DRVR and the TPS717185DSER?
The TPS71933-33DRVR is a fixed 3.3 V output LDO in a 6-pin WSON (DRV) package, while the TPS717185DSER is a fixed 1.85 V output LDO in a 6-pin WSON (DSE) package. They differ in output voltage, package footprint, and associated thermal and electrical characteristics.
Can the TPS71933-33DRVR and TPS717185DSER be used as direct substitutes for each other?
No. The output voltages are different (3.3 V vs 1.85 V), and the packages are not pin-to-pin compatible (DRV vs DSE). Substitution requires validation of output voltage, pinout, thermal performance, and the target application requirements.
What is the output voltage and package type of the TPS71933-33DRVR?
The TPS71933-33DRVR provides a fixed 3.3 V output and is supplied in a 6-pin WSON (DRV) package.
What is the output voltage and package type of the TPS717185DSER?
The TPS717185DSER provides a fixed 1.85 V output and is supplied in a 6-pin WSON (DSE) package.
Are the TPS71933-33DRVR and TPS717185DSER pin-compatible?
No. The TPS71933-33DRVR uses the DRV package, and the TPS717185DSER uses the DSE package. These are different WSON package variants with different pinouts and land patterns, so they are not pin-compatible.
Do both devices have the same input voltage range and current rating?
No. The TPS71933-33DRVR and TPS717185DSER have different specified input voltage ranges and output current ratings. These parameters must be verified from the respective manufacturer datasheets before design use.
Which device should be selected for a 3.3 V rail versus a 1.85 V rail?
Select the TPS71933-33DRVR for a regulated 3.3 V rail and the TPS717185DSER for a regulated 1.85 V rail. Selection also depends on load current, dropout, noise, and thermal requirements verified from the datasheets.
Are the TPS71933-33DRVR and TPS717185DSER available in the same package footprint for PCB layout?
No. The TPS71933-33DRVR uses the DRV package, and the TPS717185DSER uses the DSE package. Their footprints and land patterns differ, so the PCB layout must be designed specifically for each package.