TPS70933QDBVRQ1 - 150mA, 30V Automotive LDO | Texas Instruments
MPN: TPS70933QDBVRQ1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.45 | $1.45 |
| 10 | $1.3 | $13.00 |
| 100 | $1.1 | $110.00 |
| 500 | $0.95 | $475.00 |
| 1,000 | $0.82 | $820.00 |
| 3,000 | $0.71 | $2,130.00 |
TPS70933QDBVRQ1 Overview
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage. LDOs sit within the broader taxonomy of linear regulators, which in turn belong to the voltage regulator and power management IC category. Unlike switching regulators, LDOs dissipate the difference between input and output as heat, but they introduce no switching noise - making them ideal for noise-sensitive analog and RF signal chains.
Key features of the TPS70933QDBVRQ1 include an integrated enable pin for power sequencing, internal current limit, thermal shutdown, and reverse current protection that prevents current flow from output back to input when the input rail collapses. The 1 uA quiescent current extends battery life in always-on applications, while the wide 30 V input range accommodates load-dump transients common in 12V automotive buses.
The device uses a PNP pass element architecture with internal compensation, requiring only 1 uF ceramic output capacitance for stability. Reverse current protection eliminates the need for external blocking diodes in power-muxing circuits, reducing BOM count and board area in space-constrained modules.
Typical applications include automotive body electronics, always-on battery-powered sensors, infotainment standby rails, and industrial IoT edge nodes. The TPS70933QDBVRQ1's combination of ultra-low IQ, reverse current blocking, and AEC-Q100 qualification makes it particularly suitable for designs that must survive cold-crank and load-dump events while drawing minimal quiescent current from the vehicle battery.
When designing with this part, ensure the input capacitor meets the manufacturer's minimum ESR requirements and place it within 5 mm of the IN pin to handle high di/dt transients. The reverse current protection block is rated to prevent back-feeding when VOUT exceeds VIN, which is critical during power-down sequencing in multi-rail automotive systems.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone TPS70933QDBVRQ1 datasheet.
Drop-in alternatives for TPS70933QDBVRQ1 — 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:
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TPS70916DBVR
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TPS70933QDBVRQ1 Maximum Ratings & Electrical Characteristics
| Output Type | Fixed |
| Output Voltage | 3.3 V |
| Maximum Output Current | 150 mA |
| Input Voltage Range | 2.7 V to 30 V |
| Quiescent Current | 1 uA (typical) |
| Enable Pin | Yes |
| Reverse Current Protection | Yes |
| Operating Temperature Range | -40C to +125C |
| Package | SOT-23-5 (DBV) |
| Mounting Type | Surface Mount |
| Number of Pins | 5 |
| Automotive Qualification | AEC-Q100 |
| RoHS Status | Compliant |
TPS70933QDBVRQ1 Pin Configuration
| Pin 1 | IN — Input voltage supply (2.7 V to 30 V) |
| Pin 2 | GND — Ground reference |
| Pin 3 | EN — Enable (active-high logic input) |
| Pin 4 | NC — Not connected (per datasheet) |
| Pin 5 | OUT — Regulated 3.3 V output |
Typical Applications
TPS70933QDBVRQ1 is suitable for 6 applications: Automotive Body Electronics & Standby Rails, Battery-Powered IoT Sensor Nodes, Industrial 24V Bus Point-of-Load Regulation, Automotive Infotainment Standby Supply, Tire Pressure Monitoring System (TPMS) Sensors, Portable Medical Monitoring Devices.
Automotive Body Electronics & Standby Rails
The TPS70933QDBVRQ1 is ideal for automotive body electronics modules that require an always-on 3.3V rail drawing minimal quiescent current from the vehicle battery. Its 1 uA typical IQ extends parked-vehicle battery life while the 30 V maximum input survives 18V load-dump transients on the 12V bus. The AEC-Q100 qualification and -40C to +125C operating range ensure reliability underhood and in cabin environments. Placed after the reverse-battery protection MOSFET and ahead of the MCU's always-on domain, the TPS70933QDBVRQ1 provides a clean 3.3V rail with reverse current protection that prevents back-feeding when the module is unpowered - eliminating the external blocking diode and reducing BOM cost.
Recommended
Battery-Powered IoT Sensor Nodes
The TPS70933QDBVRQ1 fits battery-powered wireless sensor nodes that spend most of their life in deep-sleep mode. Its 1 uA quiescent current contributes negligible drain to the cell while still providing a regulated 3.3V rail for the MCU wake-up domain. The 30 V input range allows direct connection to industrial 24V supply rails with adequate transient headroom. When paired with a load switch for the high-current radio domain, the TPS70933QDBVRQ1 powers the always-on logic while the radio is gated off - a common pattern in BLE/Zigbee end nodes with multi-year battery life targets.
Recommended
Industrial 24V Bus Point-of-Load Regulation
For industrial control systems operating from a 24V bus, the TPS70933QDBVRQ1 provides a compact 3.3V point-of-load supply for microcontrollers, sensor interfaces, and indicator LEDs. The 30 V maximum input comfortably handles 24V nominal plus transient overshoots, while the 1 uA IQ minimizes heat dissipation at high input-to-output differentials. The SOT-23-5 footprint fits dense PLC and HMI boards where board area is at a premium. The integrated enable pin supports sequenced multi-rail power-up, critical for processors requiring controlled rail sequencing during cold-start events.
Recommended
Automotive Infotainment Standby Supply
The TPS70933QDBVRQ1 serves as a standby rail in automotive infotainment head units that must remain responsive when the ignition is off. Its ultra-low 1 uA quiescent current preserves the auxiliary 12V battery, while the AEC-Q100 grade meets OEM automotive reliability requirements. The reverse current protection is critical during cranking events when VOUT momentarily exceeds the collapsed VIN, preventing back-feeding that could disrupt other modules on the same bus. This makes the TPS70933QDBVRQ1 a preferred choice over non-protected LDOs for always-on automotive applications.
Recommended
Tire Pressure Monitoring System (TPMS) Sensors
The TPS70933QDBVRQ1 is an excellent fit for tire pressure monitoring sensors that operate from a single coin cell for 10+ years. Its 1 uA quiescent current combined with the 30 V input tolerance handles the harsh automotive environment and the inductive transients from the wheel-mounted transmitter. The compact SOT-23-5 package saves precious PCB area inside the small TPMS housing. Reverse current protection prevents back-feeding during the wireless transmission pulses, which would otherwise slowly drain the battery through the LDO's body diode.
Recommended
Portable Medical Monitoring Devices
The TPS70933QDBVRQ1's ultra-low quiescent current makes it suitable for portable medical monitoring devices such as glucose meters, pulse oximeters, and continuous-wear biosensors that prioritize battery life. The 30 V input tolerance protects against ESD and inductive transients that portable devices encounter in clinical and home environments. The fixed 3.3V output directly powers low-power analog front-end ICs and BLE SoCs. While not medical-grade certified, the TPS70933QDBVRQ1 provides a stable, low-noise supply well-suited to battery-powered health monitoring applications where every microamp counts.
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Recommended Products Summary
Engineering reference data for TPS70933QDBVRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS70933DBVR | TPS70933QDBVRM3Q1 | TPS70633DBVR | TPS70916DBVR |
|---|---|---|---|---|---|
| Package | SOT-23-5 (DBV) | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 1.6 V |
| Output Current | 150 mA | 150 mA | 150 mA | 150 mA | 150 mA |
| Input Voltage Range | 2.7 V to 30 V | 2.7 V to 30 V | 2.7 V to 30 V | 2.7 V to 30 V | 2.7 V to 30 V |
| Quiescent Current | 1 uA | 1 uA | 1 uA | ~1 mA | 1 uA |
| Automotive Grade (AEC-Q100) | Yes | No (industrial) | Yes | No (industrial) | No (industrial) |
| Reverse Current Protection | Yes | Yes | Yes | No | Yes |
Key Differentiators
- Ultra-low 1 uA quiescent current vs industrial-grade alternatives (vs TPS70633DBVR)
- Integrated reverse current protection eliminates external blocking diode (vs TPS70633DBVR)
- AEC-Q100 qualification with -40C to +125C operating range (vs TPS70933DBVR)
- Compact SOT-23-5 footprint vs larger LDO packages (vs TPS7A6650QDGNRQ1)
Design Notes
The TPS70933QDBVRQ1 requires a minimum 1 uF ceramic input and output capacitor for stability. Per the TI TPS709-Q1 datasheet, place the input capacitor within 5 mm of the IN pin to handle high di/dt transients typical of automotive load-dump events. For applications with large VIN-VOUT differentials (e.g., 24V to 3.3V at 100 mA), the part dissipates approximately 2.07 W - the SOT-23-5 thermal resistance (theta_JA ~ 200 C/W on a standard JEDEC 4-layer board) limits continuous output current unless copper pours are added to spread heat.
Estimated: at VIN=24V, VOUT=3.3V, IOUT=100 mA, power dissipation is (24-3.3) * 0.1 = 2.07 W. With the SOT-23-5 theta_JA of approximately 200 C/W on a JEDEC 4-layer board, junction temperature rise is 414 C above ambient - exceeding the 125 C rating. For continuous operation above 50 mA at high VIN, add a copper heatsink pour under the exposed pad region or reduce VIN to lower dissipation. The thermal shutdown protects the part but will trigger in this scenario.
Do not exceed the 30 V absolute maximum on IN - load-dump transients in 12V automotive systems can reach 35-40V without external suppression. Add a TVS diode (e.g., SMBJ33CA) ahead of the LDO for 12V automotive designs. Do not leave EN floating - tie to IN through a 100 kohm resistor or drive directly with a logic signal, as undefined EN state may cause unpredictable startup behavior. The NC pin (pin 4) must be left floating per datasheet, not connected to ground or any signal.
Use a star-ground topology with the TPS70933QDBVRQ1 GND pin returning directly to the PCB ground plane near the input capacitor. Keep high-current traces (IN, OUT) short and wide to minimize voltage drops. The SOT-23-5 land pattern follows JEDEC MO-178 - no special thermal vias are required for low-power (<50 mA continuous) operation, but a small copper pour connected to GND helps thermal spreading.
Compliance Information
AEC-Q100 Grade 1 qualified per TI TPS709-Q1 datasheet. RoHS and REACH compliant. Lead-free and halogen-free per TI material declaration.