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Texas Instruments TPS76733QPWPR
- Part No.:
- TPS76733QPWPR
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS76733QPWPR.pdf
- Description:
- IC REG LINEAR 3.3V 1A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,919
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Product details
Overview
TPS76733QPWPR from Texas Instruments is a 3.3-V fixed-output, 1-A low-dropout linear regulator with PMOS pass element, 350 mV dropout at 1 A (25°C), 85 µA typical quiescent current, and integrated open-drain power-on reset with 200-ms delay. It delivers stable voltage for microcontroller core supplies in battery-powered industrial instrumentation.
For engineers reviewing the TPS76733QPWPR datasheet, TPS76733QPWPR pinout, TPS76733QPWPR application, or TPS76733QPWPR equivalent, key selection criteria include dropout performance across temperature, RESET threshold hysteresis (92–98% VO), thermal shutdown at 150°C, and compatibility with 10-µF low-ESR output capacitors.
Technical Context
The TPS76733QPWPR uses a voltage-driven PMOS pass transistor to achieve load-independent quiescent current and avoid PNP saturation issues during dropout. Its internal 1.1834-V reference feeds a high-impedance error amplifier that regulates output via feedback sensing at the FB/NC pin (unused in fixed versions).
A dedicated comparator monitors regulated output voltage against 92–98% VO thresholds to assert the open-drain RESET signal with 200-ms timeout. Thermal shutdown activates at 150°C junction temperature and recovers at ~130°C, while current limiting caps output at ~1.7 A under fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±2% over line, load, and −40°C to 125°C - ensures reliable MCU core supply within tolerance across operating range. |
| Dropout Voltage | 350 mV typ at 1 A, 25°C; 575 mV max at 1 A, −40°C to 125°C - enables regulation from 3.65 V input at full load and elevated temperature. |
| Quiescent Current | 85 µA typ, 125 µA max at 1 A load, −40°C to 125°C - extends battery life in always-on sensor nodes without sacrificing regulation accuracy. |
| RESET Threshold | 92–98% of VO (3.04–3.23 V) with 0.5-V hysteresis - provides clean, noise-immune power-on reset signaling for microcontrollers. |
| Thermal Shutdown | 150°C activation, ~130°C recovery - protects device during sustained overload or poor PCB heatsinking without latch-up. |
| Output Capacitor | 10 µF minimum, ESR 50 mΩ–1.5 Ω - supports stability with common solid tantalum, aluminum electrolytic, or multilayer ceramic capacitors. |
| Enable Input | Logic-high ≥1.7 V, logic-low ≤0.9 V - allows direct interfacing with 3.3-V or 5-V digital control signals without level-shifting. |
Pinout & Package
TPS76733QPWPR is packaged in a 20-pin HTSSOP (PWP) with exposed thermal pad (6.50 mm × 4.40 mm body). The package features eight GND/HSINK pins (pins 1, 2, 9, 10, 11, 12, 19, 20) for enhanced thermal dissipation and low-inductance grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND/HSINK (1, 2, 9, 10, 11, 12, 19, 20) | Ground reference and thermal heatsink | Multiple low-impedance ground paths reduce noise coupling and improve thermal resistance (RθJB = 8.7°C/W). |
| IN (6, 7) | Unregulated input voltage supply | Dual-input pins distribute current and reduce trace IR drop; accepts 2.7 V to 10 V input per spec. |
| OUT (13, 14) | Regulated 3.3-V output | Dual-output pins lower effective output impedance and support higher peak currents without voltage sag. |
| EN (5) | Active-high enable control | Pulling EN ≥1.7 V enables regulation; tying to GND disables output and reduces quiescent current to 1 µA. |
| RESET (16) | Open-drain reset indicator | Asserts low when VO drops below 92% nominal; requires external pullup for system reset assertion. |
| FB/NC (15) | Feedback input / no-connect | No internal connection for fixed-output TPS76733QPWPR; left unconnected per datasheet. |
| NC (4, 8, 17, 18) | No internal connection | Unused pins; must remain unconnected to avoid parasitic coupling or mechanical stress. |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | Stable with 10-µF low-ESR output capacitor; load step response shows <100-mV undershoot/overshoot at 1-A step (Fig. 18). |
| Ultralow quiescent current | 85 µA typical over full 0–1 A load range and −40°C to 125°C - enables >1-year battery life in 10-µA sleep systems. |
| Integrated power-on reset | 200-ms delay, 92–98% VO threshold, open-drain output - eliminates need for external supervisor IC in MCU designs. |
| Thermal and current protection | 150°C shutdown with hysteresis + ~1.7-A current limit - prevents catastrophic failure during short-circuit or overload events. |
| PMOS pass architecture | Dropout directly proportional to load; no base-drive current required - avoids startup surge and maintains regulation down to VIN = VO + VDO. |
Applications
| Industrial Sensor Node Power | Automotive Body Control Module |
|---|---|
|
Use Scenario: Powering 3.3-V ARM Cortex-M0+ MCU, CAN transceiver, and analog front-end in battery-backed environmental sensor. IC Role / Device Role / Timing Role: Primary LDO delivering clean, regulated 3.3 V; RESET signal initiates firmware initialization on cold start. Use Value: 85 µA quiescent current extends 2×AA battery life beyond 2 years; 350-mV dropout allows operation until battery reaches 3.65 V. |
Use Scenario: Supplying infotainment SoC I/O rails and EEPROM interface in 12-V automotive subsystem. IC Role / Device Role / Timing Role: Secondary LDO post-regulating switched-mode supply; RESET monitors brownout during cranking (6–8 V battery dip). Use Value: 92–98% VO threshold and 200-ms delay prevent spurious resets during engine start; thermal shutdown protects against under-hood overheating. |
| Portable Medical Diagnostic Device | Programmable Logic Controller I/O Module |
|
Use Scenario: Providing stable 3.3-V bias to ADC, op-amps, and Bluetooth LE radio in handheld ECG monitor. IC Role / Device Role / Timing Role: Low-noise local regulator decoupling noisy digital domains; RESET triggers data logging abort on undervoltage. Use Value: 55-µVrms output noise (TPS76718, comparable family member) ensures <12-bit ADC accuracy; 10-µF capacitor compatibility simplifies layout. |
Use Scenario: Powering isolated digital I/O drivers and FPGA configuration memory in DIN-rail mounted PLC module. IC Role / Device Role / Timing Role: Point-of-load regulator for field-side logic; EN pin enables remote power cycling via PLC controller. Use Value: Dual IN/OUT pins reduce PCB trace resistance and inductance; 8-pin SOIC alternative (TPS76733QD) offers footprint flexibility for space-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76733QD | Same electrical specs; 8-pin SOIC (4.90 mm × 3.91 mm) vs. 20-pin HTSSOP - higher RθJA (106.9°C/W vs. 35.8°C/W). | Limited to lower ambient temperatures or reduced load current due to thermal constraints; preferred for cost-sensitive, low-power layouts. | Select TPS76733QD when board space is constrained and thermal budget permits ≤500 mA continuous load at 70°C ambient. |
| TLV70033DDCT | Lower IQ (30 µA), smaller 5-pin SOT-23 package, but 200-mA max output and 170-mV dropout at 200 mA - not 1-A capable. | Suitable only for ultra-low-power peripherals (e.g., RTC, sensors); cannot replace TPS76733QPWPR in 1-A MCU core supply roles. | Choose TLV70033DDCT for auxiliary 3.3-V rails with <200 mA demand where minimal quiescent current outweighs output current needs. |
Compared with TPS76733QD and TLV70033DDCT, the TPS76733QPWPR uniquely balances 1-A output capability, 350-mV dropout, and integrated RESET in a thermally robust 20-pin HTSSOP - making it optimal for industrial MCU power where reliability and thermal margin are critical.
Availability
TPS76733QPWPR is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, portable medical diagnostics, programmable logic controller I/O modules, and battery-powered embedded systems requiring stable component supply and long-term manufacturability.
Supply support for TPS76733QPWPR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, designing and manufacturing analog and embedded processing chips for industrial, automotive, and personal electronics markets.
The TPS767xx family was engineered for high-reliability, low-quiescent-current linear regulation in battery-critical and thermally demanding applications - emphasizing fast transient response, integrated supervision, and robust thermal protection.
FAQ
What is the minimum input voltage required for TPS76733QPWPR to maintain regulation?
The minimum input voltage for TPS76733QPWPR is VO + VDO. At 25°C and 1-A load, VDO = 350 mV, so minimum VIN = 3.65 V. Over temperature (−40°C to 125°C), VDO rises to 575 mV, requiring VIN ≥ 3.875 V to sustain 3.3-V output at full load. This is specified in Section 7.5 of the datasheet.
Does TPS76733QPWPR require an external pullup resistor on the RESET pin?
Yes, TPS76733QPWPR has an open-drain RESET output and requires an external pullup resistor (typically 10–100 kΩ to 3.3 V or 5 V) to generate a valid logic-high signal when not asserted. Without pullup, RESET remains floating and cannot drive microcontroller reset inputs reliably.
Can TPS76733QPWPR operate without a minimum load current?
Yes, TPS76733QPWPR is stable at zero load - no minimum load is required. This is confirmed in Section 9.4.1 (Minimum Load Requirements) and enables use in standby modes where downstream circuitry may be fully powered down.
What output capacitor ESR range is supported by TPS76733QPWPR?
TPS76733QPWPR requires an output capacitor with ESR between 50 mΩ and 1.5 Ω, as stated in Section 10.1.1. Capacitors outside this range risk instability or excessive output ripple; 10-µF solid tantalum or X5R/X7R ceramic types meeting this ESR spec are recommended.
Is TPS76733QPWPR pin-compatible with other devices in the TPS767xx family?
TPS76733QPWPR shares the same 20-pin HTSSOP (PWP) pinout with all fixed-output TPS767xxQ variants (e.g., TPS76725QPWPR, TPS76750QPWPR), enabling drop-in replacement across output voltages without PCB redesign - provided thermal and input voltage requirements are met.
TPS76733QPWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.58V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (1kHz)
- Control Features:
- Enable, Reset
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS76733QPWPR FAQ
1.How can I place an order for TPS76733QPWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS76733QPWPR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS76733QPWPR reliable?
The price and inventory of TPS76733QPWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS76733QPWPR is usually 5 days.
3.What payment methods are accepted for TPS76733QPWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS76733QPWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS76733QPWPR?
TPS76733QPWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS76733QPWPR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS76733QPWPR?
For technical support, including TPS76733QPWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS76733QPWPR requirements.
6.How does Aetrix verify that TPS76733QPWPR is sourced from the original manufacturer or authorized distributors?
All TPS76733QPWPR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS76733QPWPR meets industry standards.
7.What is the process for return or replacement of TPS76733QPWPR?
All TPS76733QPWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS76733QPWPR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS76733QPWPR part is unused and in its original packaging.
Return procedure for TPS76733QPWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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