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Texas Instruments TPS73733DCQR
- Part No.:
- TPS73733DCQR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-223-6
- Description:
- IC REG LINEAR 3.3V 1A SOT223-6
- Quantity:
Unit Price:$0
Ext Price:$0
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- Shipping:
Product Details
TPS73733DCQR - Fixed 3.3 V, 1 A Low-Dropout Regulator
Texas Instruments TPS73733DCQR is a fixed 3.3 V, 1 A LDO with reverse-current protection, enable control, low dropout, fast transient response, foldback current limiting, and thermal shutdown.
The exact 3.3 V DCQ order code and current specifications were checked against TI TPS737 datasheet SBVS067W.
Overview
TPS73733DCQR regulates a 3.3 V rail from an input supply up to 5.5 V. Its NMOS topology combines low dropout with low reverse leakage and stability with ceramic output capacitors.
Key Advantages
1 A output
Supports high-current point-of-load rails.
Low dropout
Typical dropout at 1 A is 130 mV for legacy silicon or 122 mV for new silicon.
Fixed 3.3 V rail
No external feedback divider is required.
Fault protection
Foldback current limit and thermal shutdown protect the regulator.
Feature Summary
- 2.2 V to 5.5 V input range, subject to output-voltage headroom.
- Fixed 3.3 V nominal output.
- 1% initial accuracy.
- Less than 20 nA typical shutdown current.
- Stable with a 1 microfarad or larger ceramic output capacitor.
- -40 to 125 degrees C junction-temperature range.
Package & Footprint
The exact order uses TI's DCQ six-terminal SOT-223 package, registered in the catalog as SOT-223-6.
/upload/package/SOT-223-6.jpg returned HTTP 404, so publication is blocked pending a verified package JPG.- Use the current TI DCQ mechanical drawing and land pattern.
- Confirm the five leads plus thermal tab geometry.
- Connect the ground tab/pad according to the datasheet.
- Provide copper area for heat spreading.
Pin Functions
Key Specifications
| Manufacturer | Texas Instruments |
|---|---|
| Function | Fixed-output low-dropout regulator |
| Nominal output | 3.3 V |
| Maximum output current | 1 A |
| Input range | 2.2 to 5.5 V |
| Typical dropout at 1 A | 130 mV legacy; 122 mV new silicon |
| Initial accuracy | 1% |
| Overall accuracy | 3% legacy; 1.5% new silicon |
| Output capacitor | 1 microfarad minimum ceramic |
| Shutdown current | Less than 20 nA typical |
| Temperature | -40 to 125 degrees C |
| Package | DCQ / SOT-223-6 |
Replacement Considerations
Match the fixed 3.3 V output, 1 A rating, input range, dropout, capacitor stability, enable polarity, NR pin, reverse-current behavior, pinout, grounded tab, and thermal limits.
No internal replacement is asserted without an exact production-API match and engineering review.
Manufacturer Information
Texas Instruments lists the TPS737 family as active. Datasheet SBVS067W distinguishes legacy and new silicon performance; a reel label can identify the manufacturing flow when that distinction matters.
Applications
3.3 V digital rails
Supply processors, logic, and interface circuitry.
Microprocessors
Support high-current point-of-load regulation.
Post regulation
Reduce ripple after a switching converter.
Portable equipment
Use shutdown mode to minimize standby drain.
Quality & Authenticity
Verify the full TPS73733DCQR code, TI label, DCQ body, reel identity, lot and date traceability, package marking, and manufacturing-flow information. Package shape alone cannot confirm the fixed 3.3 V version.
FAQ
Is the output adjustable?
No. TPS73733 is the fixed 3.3 V version.
What capacitor is required?
Use at least 1 microfarad ceramic at the output.
Can it source 1 A?
Yes, within dropout, current-limit, and thermal constraints.
Why are two dropout figures shown?
TI documents separate typical values for legacy and new silicon flows.
Can this product be published now?
No. The production package JPG is missing and must be verified first.
Engineering Notice
Validate input headroom, dropout, output capacitance, NR capacitor choice, startup, shutdown, reverse-current paths, current-limit recovery, copper area, and junction temperature. Confirm the exact silicon flow if the tighter new-silicon limits are required.
TPS73733DCQR Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-223-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 400 µA
- Current - Supply (Max):
- 1.3 mA
- PSRR:
- 58dB ~ 37dB (100Hz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-6
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