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Texas Instruments TPS76633DRG4
- Part No.:
- TPS76633DRG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS76633DRG4.pdf
- Description:
- IC REG LINEAR 3.3V 250MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,016
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Product details
Overview
TPS76633DRG4 from Texas Instruments is a fixed-output 3.3V, 250mA low-dropout (LDO) linear voltage regulator in an 8-pin SOIC package. It supports 2.5V–16V input, delivers ±1% output accuracy over load and temperature, features open-drain power-good signaling, and operates in HVAC control modules requiring stable 3.3V bias for microcontrollers and sensors.
For engineers reviewing the TPS76633DRG4 datasheet, TPS76633DRG4 pinout, TPS76633DRG4 application, or TPS76633DRG4 equivalent, key selection criteria include dropout voltage at full load (260mV typ), PSRR of 46dB at 1MHz, internal soft-start (750µs), thermal shutdown (173°C), and compatibility with ≥2.2µF ceramic output capacitors.
Technical Context
The TPS76633DRG4 implements a PMOS pass transistor architecture enabling low dropout and high PSRR. Its feedback loop uses an internal 0.8V reference with precision error amplifier, supporting stable regulation across –40°C to +125°C junction temperature.
It integrates enable-controlled sleep mode (standby current ≤6.75µA), open-drain power-good with 91–98.5% VOUT trip threshold and 0.45% hysteresis, and overcurrent/thermal protection with foldback current limiting and automatic recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3V ±1% over –40°C to +125°C and 10µA–250mA load |
| Input voltage range | 2.5V to 16V - supports transformer secondaries and 12V rails without external pre-regulation |
| Dropout voltage | 260mV typical at 250mA - enables operation with only 3.56V input for full 3.3V output |
| Quiescent current | 55µA typical at no load - minimizes standby power in always-on systems |
| PSRR | 46dB at 1MHz - suppresses switching noise from upstream DC/DC converters |
| Power-good output | Open-drain with 91–98.5% VOUT threshold - enables reliable power-on reset sequencing |
| Start-up time | 750µs typical - limits inrush current and reduces required input capacitance |
Pinout & Package
Package: 8-pin SOIC (D), 4.9mm × 6mm body, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (pins 5, 6) | Input supply connection | Dual-input pins reduce trace resistance and improve thermal performance; requires ≥1µF ceramic capacitor near pins |
| OUT (pins 7, 8) | Regulated output | Dual-output pins lower output impedance; stable with ≥2.2µF ceramic capacitor (ESR ≤2Ω) |
| GND (pin 3) | Ground reference | Primary ground return for regulator core and feedback network; must be low-impedance PCB plane |
| EN (pin 4) | Enable control input | TTL-compatible; <0.4V disables regulator (standby IQ ≤6.75µA), >1.2V enables |
| PG (pin 2) | Power-good indicator | Open-drain output; requires external pull-up; asserts high when VOUT reaches 91–98.5% of nominal |
| NC/FB (pin 1) | No-connect (fixed version) | Not internally connected; leave floating or tie to GND for improved thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range (2.5V–16V) | Eliminates need for pre-regulators in 12V automotive or industrial rail applications |
| ±1% output accuracy over temperature and load | Ensures reliable operation of 3.3V I/O peripherals and ADC references without calibration |
| Stable with 2.2µF ceramic output capacitor | Reduces BOM cost and board area vs. tantalum or larger electrolytic capacitors |
| Internal soft-start (750µs) | Prevents input voltage sag during power-up, allowing smaller input bulk capacitors |
| Thermal shutdown with hysteresis (173°C trip / 157°C reset) | Protects against sustained overload while avoiding oscillation near thermal limit |
Applications
| Residential Air Conditioners | HVAC Systems |
|---|---|
Use Scenario: Powering 3.3V MCU and temperature/humidity sensor subsystems in indoor unit control boards. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying logic and analog circuitry; provides clean, regulated bias independent of main 12V rail fluctuations. Use Value: High PSRR (46dB @ 1MHz) attenuates noise from compressor inverter switching, preserving ADC accuracy and communication integrity. | Use Scenario: Biasing fan motor controller ICs and CAN transceivers in ducted HVAC control panels. IC Role / Device Role / Timing Role: Fixed 3.3V regulator with PG signal used for system-level power sequencing and fault detection. Use Value: Open-drain PG output interfaces directly with microcontroller reset inputs, enabling deterministic startup after brownout recovery. |
| Body Electronics and Lighting | Washers and Dryers |
Use Scenario: Supplying door lock actuators and LED driver ICs in automotive body control modules (BCM). IC Role / Device Role / Timing Role: Secondary LDO delivering 3.3V to low-power logic; EN pin enables synchronized shutdown during vehicle sleep mode. Use Value: Standby current ≤6.75µA meets automotive OEM requirements for ultra-low quiescent consumption in off-state. | Use Scenario: Providing 3.3V to main control MCU and user interface display in front-load washing machines. IC Role / Device Role / Timing Role: Main 3.3V regulator with thermal protection; withstands ambient temperatures up to +85°C inside appliance enclosures. Use Value: Dropout voltage of 260mV at 250mA ensures regulation even as input decays during mains interruption or battery backup scenarios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76733QPWPRQ1 | Automotive-grade (AEC-Q100), higher PSRR (65dB @ 1kHz), 1.5A output, larger 20-pin HTSSOP package | Designed for under-hood automotive use; includes dual-output and thermal foldback | Select for automotive safety-critical systems requiring qualification and higher current capability |
| MCP1703T-3302E/MB | 3.3V fixed, 250mA, 6µA quiescent current, SOT-23-5 package, no PG or EN | Lacks power-good and enable functions; optimized for ultra-low IQ portable devices | Select when minimal quiescent current is critical and sequencing/monitoring features are unnecessary |
Compared with TPS76633DRG4, the TPS76733QPWPRQ1 offers automotive qualification and higher drive strength but requires PCB redesign due to different package and pinout; the MCP1703T-3302E/MB saves board space and power but sacrifices system-level monitoring and control features.
Availability
TPS76633DRG4 is available at Aetrix Electronics and suitable for residential HVAC controls, appliance mainboards, and automotive body electronics requiring stable component supply, long-term manufacturability, and TI-qualified production lots.
Supply support for TPS76633DRG4 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 leader specializing in analog, embedded processing, and power management technologies with over 90 years of innovation in high-reliability components.
The TPS766 family was designed for industrial and consumer power management applications demanding wide-input-voltage LDOs with precision output, robust protection, and flexible enable/PG control - particularly where transformer-derived or unregulated rails are present.
FAQ
What is the maximum input voltage rating for the TPS76633DRG4?
The TPS76633DRG4 has an absolute maximum input voltage of 18V. Its recommended operating input range is 2.5V to 16V, making it suitable for direct connection to 12V systems with transient headroom. Exceeding 18V risks permanent damage per the Absolute Maximum Ratings table in the official datasheet SLVS237E.
Does the TPS76633DRG4 require an external feedback resistor network?
No, the TPS76633DRG4 is a fixed-output 3.3V regulator. Pin 1 (NC/FB) is not connected internally and should be left floating or tied to GND for thermal improvement. External resistors are only required for adjustable versions like TPS76601; the TPS76633DRG4 uses an internal resistor divider calibrated to 3.3V.
What output capacitor value and type does the TPS76633DRG4 require for stability?
The TPS76633DRG4 is stable with a minimum 2.2µF ceramic capacitor (X5R/X7R) on the output, with ESR ≤2Ω. The datasheet confirms stability across the full 2.2µF–220µF range. Larger values improve transient response but are not required; aluminum or tantalum capacitors are unnecessary and may degrade phase margin.
How does the power-good (PG) function operate on the TPS76633DRG4?
The TPS76633DRG4 PG pin is an open-drain output that goes high when VOUT reaches 91–98.5% of nominal (3.3V), with 0.45% hysteresis. It requires an external pull-up resistor (typically 10kΩ to 3.3V or 5V). When VOUT drops below threshold, PG pulls low - enabling use as a power-on reset or brownout indicator in systems using the TPS76633DRG4.
Is the TPS76633DRG4 pin-compatible with earlier TPS766xx variants?
Yes, all TPS766xx variants including TPS76633DRG4 share identical 8-pin SOIC (D) packaging and pinout. The IN, OUT, GND, EN, PG, and NC/FB assignments are consistent across the family. However, electrical behavior differs between legacy and new silicon revisions - notably in dropout, PSRR, and quiescent current - so design validation against the specific revision is essential.
TPS76633DRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 0.4V @ 250mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 50 µA
- Current - Supply (Max):
- -
- PSRR:
- 63dB (1kHz)
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS76633DRG4 FAQ
1.How can I place an order for TPS76633DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS76633DRG4 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 TPS76633DRG4 reliable?
The price and inventory of TPS76633DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS76633DRG4 is usually 5 days.
3.What payment methods are accepted for TPS76633DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS76633DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS76633DRG4?
TPS76633DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS76633DRG4 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 TPS76633DRG4?
For technical support, including TPS76633DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS76633DRG4 requirements.
6.How does Aetrix verify that TPS76633DRG4 is sourced from the original manufacturer or authorized distributors?
All TPS76633DRG4 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 TPS76633DRG4 meets industry standards.
7.What is the process for return or replacement of TPS76633DRG4?
All TPS76633DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS76633DRG4, 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 TPS76633DRG4 part is unused and in its original packaging.
Return procedure for TPS76633DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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