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Texas Instruments TPS76650DRM3
- Part No.:
- TPS76650DRM3
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS76650DRM3.pdf
- Description:
- 250-MA ULTRA-LOW IQ LOW-DROPOU
- Quantity:
- Payment:
- Shipping:
Inventory:2,274
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Product details
Overview
TPS76650DRM3 from Texas Instruments is a fixed-output 5.0V, 250mA low-dropout linear regulator with 250mV typical dropout at full load, 1% output accuracy over temperature and load, and integrated open-drain power-good (PG) signaling. It operates from 2.5V to 16V input and supports stable regulation with ≥2.2µF output capacitance - used in HVAC control modules, automotive body electronics, and industrial MCU power rails.
For engineers reviewing the TPS76650DRM3 datasheet, TPS76650DRM3 pinout, TPS76650DRM3 application, or TPS76650DRM3 equivalent, key selection criteria include its 5.0V fixed output, SOIC-8 package compatibility, 46dB PSRR at 1MHz for DC/DC post-regulation, internal soft-start (750µs), and thermal shutdown with 173°C trip point.
Technical Context
The TPS76650DRM3 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 1% output tolerance across –40°C to +125°C junction temperature.
It integrates enable-controlled sleep mode (standby current ≤6.75µA), open-drain PG with 91–98.5% VOUT hysteresis, and overcurrent/thermal protection. Input voltage range (2.5V–16V) and 18V absolute max rating make it suitable for transformer-derived or regulated 12V rail applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1% over –40°C to +125°C; enables direct powering of 5V logic, microcontrollers, and analog sensors without external resistors. |
| Max Output Current | 250mA continuous; sufficient for mid-power MCU cores, CAN transceivers, and sensor signal chains in industrial controls. |
| Dropout Voltage | 250mV typical at 250mA (TJ = 25°C); allows operation with only 5.25V input to sustain 5.0V output under full load. |
| PSRR | 46dB at 1MHz; attenuates switching noise from upstream DC/DC converters, reducing need for additional filtering stages. |
| Quiescent Current | 55µA typical (no load); maintains ultra-low system standby power in always-on subsystems like HVAC status monitoring. |
| Power-Good Threshold | 91–98.5% VOUT with 0.45% hysteresis; provides reliable power-on reset timing for MCUs without external supervision ICs. |
| Soft-Start Time | 750µs typical; limits inrush current during startup, permitting smaller input bulk capacitors and easing board-level surge design. |
Pinout & Package
TPS76650DRM3 is housed in an 8-pin SOIC (D) package measuring 4.9mm × 6mm, with exposed pad not present. Pin functions are validated per TI SLVS237E Rev. March 2024.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 5, 6) | Input supply connection | Dual pins reduce trace resistance and thermal impedance; requires ≥1µF ceramic input capacitor placed adjacent to both pins and GND. |
| OUT (Pins 7, 8) | Regulated output node | Dual pins lower output path resistance; supports ≥2.2µF output capacitance with ESR ≤2Ω for stability. |
| GND (Pin 3) | Ground reference | Primary return path for load, bias, and feedback currents; must be low-impedance and thermally coupled to PCB copper pour. |
| EN (Pin 4) | Enable control input | TTL-compatible; <0.4V disables regulator (IQ ≤6.75µA), >1.2V enables; no pull-up required for default-on operation. |
| PG (Pin 2) | Open-drain power-good flag | Active-high when VOUT reaches 91% of target; requires external pull-up resistor (e.g., 10kΩ to VOUT) for MCU reset assertion. |
| NC/FB (Pin 1) | No-connect / Feedback | Not connected internally for fixed-output TPS76650; leave unconnected or tie to GND for improved thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| 1% output accuracy over load and temperature | Enables direct interfacing with 12-bit ADC references and precision analog front-ends without calibration overhead. |
| Stable with 2.2µF output capacitor | Reduces BOM count and board area vs legacy LDOs requiring ≥4.7µF; compatible with low-ESR X5R/X7R ceramics. |
| 46dB PSRR at 1MHz | Suppresses high-frequency ripple from buck converters, allowing cleaner power for RF sections and audio codecs. |
| Internal soft-start (750µs) | Prevents input rail sag and avoids false triggering of upstream undervoltage lockout during cold start. |
| Thermal shutdown (173°C trip) | Protects against sustained overload or poor heatsinking in enclosed industrial enclosures without external thermal sensors. |
Applications
| Residential HVAC Control | Automotive Body Electronics |
|---|---|
Use Scenario: Powering microcontroller, display driver, and temperature sensor in wall-mounted smart thermostats. IC Role / Device Role / Timing Role: Primary 5V LDO supplying core logic and analog peripherals; PG signal initiates MCU boot sequence after rail stabilization. Use Value: 1% output accuracy ensures consistent ADC readings across ambient temperatures; 250mA headroom supports future firmware-driven feature expansion. | Use Scenario: Regulating 5V supply for door module ECUs controlling window lifts, mirror adjusters, and interior lighting. IC Role / Device Role / Timing Role: Secondary LDO downstream of main vehicle battery converter; EN pin synchronized to ignition state for zero-power sleep. Use Value: 6.75µA standby current extends battery life during vehicle off-state; 16V input rating accommodates load-dump transients up to 18V. |
| Industrial Washer/Dryer MCU Rail | Silicon Carbide Gate Driver Bias |
Use Scenario: Providing clean 5V power to ARM Cortex-M4-based motor control unit in commercial laundry equipment. IC Role / Device Role / Timing Role: Dedicated LDO for MCU core and communication interfaces (UART, I²C); PG asserts reset until VOUT settles within 50mV of 5.0V. Use Value: 46dB PSRR minimizes noise coupling into motor current sensing; SOIC-8 footprint allows easy layout separation from high-current power stages. | Use Scenario: Generating isolated 5V bias for SiC MOSFET gate drivers in solar inverter auxiliary supplies. IC Role / Device Role / Timing Role: Fixed-output LDO delivering gate drive voltage; high PSRR prevents switching noise from corrupting gate threshold margins. Use Value: 250mV dropout enables efficient use of intermediate 5.5V rail; thermal shutdown protects against gate driver shoot-through faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76750DR | Same 5V fixed output, SOIC-8 package, but higher 350mV dropout at 250mA and 3% accuracy; lacks PG output. | Acceptable where cost sensitivity outweighs accuracy or power-good requirements; unsuitable for systems needing precise reset timing. | Select TPS76750DR only if PG functionality and 1% tolerance are unnecessary and legacy stock availability is prioritized. |
| MCP1703-5002E/TO | 5.0V fixed, SOT-223 package; 600mV dropout at 250mA, 2% accuracy, no PG, 12V max input. | Lower cost and smaller footprint, but insufficient for 16V input rails or high-PSRR noise-sensitive designs. | Choose MCP1703-5002E/TO only for space-constrained, low-input-voltage (<12V) consumer applications where PSRR and PG are non-critical. |
Compared with TPS76650DRM3, TPS76750DR trades PG and accuracy for legacy compatibility, while MCP1703-5002E/TO sacrifices input voltage range and noise rejection for size and cost - making TPS76650DRM3 optimal for industrial 16V-rail systems demanding precision and supervision.
Availability
TPS76650DRM3 is available at Aetrix Electronics and suitable for residential HVAC systems, automotive body electronics, and industrial washer/dryer control units requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for TPS76650DRM3 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 decades of LDO design expertise and broad industrial qualification.
The TPS766 family was engineered for high-reliability, wide-input-voltage industrial and automotive power management - delivering precision regulation, robust protection, and simplified system-level power sequencing in harsh environments.
FAQ
What is the maximum input voltage rating for the TPS76650DRM3?
The TPS76650DRM3 has an absolute maximum input voltage of 18V, with recommended operating range from 2.5V to 16V. Exceeding 18V risks permanent damage. This 16V operational ceiling makes the TPS76650DRM3 suitable for 12V automotive and industrial rails with transient margin, unlike older 10V-max LDOs.
Does the TPS76650DRM3 require an external feedback resistor network?
No, the TPS76650DRM3 is a fixed-output 5.0V regulator. Pin 1 (NC/FB) is not internally connected and should be left floating or tied to GND for thermal improvement. External resistors are unnecessary - unlike adjustable variants such as TPS76601, which require FB resistor dividers.
What is the purpose and electrical behavior of the PG pin on the TPS76650DRM3?
The PG (power-good) pin on the TPS76650DRM3 is an open-drain output that goes high when VOUT reaches 91–98.5% of nominal 5.0V. It requires an external pull-up resistor (e.g., to VOUT) and provides hysteresis to prevent chatter during brownout conditions - enabling reliable MCU reset assertion without external supervisors.
Can the TPS76650DRM3 operate stably with a 2.2µF ceramic output capacitor?
Yes, the TPS76650DRM3 is explicitly characterized for stability with ≥2.2µF ceramic output capacitors having ESR ≤2Ω. This is a key upgrade over legacy LDOs requiring ≥4.7µF, reducing solution size and cost while maintaining phase margin across –40°C to +125°C.
How does the enable (EN) function behave on the TPS76650DRM3?
The EN pin on the TPS76650DRM3 disables the regulator when driven >0.4V (low threshold) and enables it when driven >1.2V (high threshold). In disabled state, quiescent current drops to ≤6.75µA. No external pull-up is needed - tying EN to IN provides default-on operation, while grounding EN fully shuts down output.
TPS76650DRM3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Negative
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.14V @ 250mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 63dB (1kHz)
- Control Features:
- Current Limit
- Protection Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS76650DRM3 FAQ
1.How can I place an order for TPS76650DRM3 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS76650DRM3 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 TPS76650DRM3 reliable?
The price and inventory of TPS76650DRM3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS76650DRM3 is usually 5 days.
3.What payment methods are accepted for TPS76650DRM3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS76650DRM3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS76650DRM3?
TPS76650DRM3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS76650DRM3 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 TPS76650DRM3?
For technical support, including TPS76650DRM3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS76650DRM3 requirements.
6.How does Aetrix verify that TPS76650DRM3 is sourced from the original manufacturer or authorized distributors?
All TPS76650DRM3 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 TPS76650DRM3 meets industry standards.
7.What is the process for return or replacement of TPS76650DRM3?
All TPS76650DRM3 units undergo pre-shipment inspection (PSI). If there is an issue with TPS76650DRM3, 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 TPS76650DRM3 part is unused and in its original packaging.
Return procedure for TPS76650DRM3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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