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Texas Instruments TPS73233DCQRG4
- Part No.:
- TPS73233DCQRG4
- Manufacturer:
- Texas Instruments
- Package:
- SOT-223-6
- Datasheet:
-
TPS73233DCQRG4.pdf
- Description:
- IC REG LIN 3.3V 250MA SOT223-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,925
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Product details
Overview
TPS73233DCQRG4 from Texas Instruments is a capacitor-free, NMOS-based 250mA low-dropout linear regulator with reverse current protection and fixed 3.3V output. It operates from 1.7V to 5.5V input, delivers ultra-low 40mV typical dropout at full load, achieves 0.5% initial accuracy and 30µVRMS output noise (10kHz–100kHz), and powers noise-sensitive VCOs in portable RF modules.
For engineers reviewing the TPS73233DCQRG4 datasheet, TPS73233DCQRG4 pinout, TPS73233DCQRG4 application, or TPS73233DCQRG4 equivalent, key selection criteria include its no-output-capacitor stability, reverse leakage <10µA, shutdown current <1µA, thermal shutdown at 160°C, and SOT-223-6 package compatibility with high-power-density PCB layouts.
Technical Context
The TPS73233DCQRG4 uses an NMOS pass transistor with integrated 4MHz charge pump to drive the gate above VOUT, enabling stable regulation without output capacitance. Its voltage-follower topology ensures near-constant ground pin current across load (400–950µA) and provides high reverse blockage via NMOS body diode isolation.
It features dedicated NR (noise-reduction) pin for external 0.01µF bypassing-reducing 30µVRMS baseline noise to ~12.75µVRMS-and foldback current limiting (250–600mA) that degrades gracefully during short-circuit events below 0.5VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3V ±1% over line/load/temperature - enables direct replacement of standard 3.3V logic rails without resistor network. |
| Dropout voltage | 40mV typical at 250mA - supports operation with only 3.34V input, critical for single-cell Li-ion or post-regulation after buck converters. |
| Output noise | 30µVRMS (10kHz–100kHz) - meets stringent phase-noise requirements for VCOs and PLLs in wireless transceivers. |
| Shutdown current | <1µA max - extends battery life in always-on IoT sensors and wearable standby modes. |
| Reverse leakage | <10µA at VIN ≤ VOUT - prevents backfeed in multi-rail systems with shared batteries or hot-swap sequencing. |
| Thermal protection | Shuts down at 160°C, resets at 140°C - safeguards against sustained overload in enclosed industrial enclosures. |
| Load regulation | 0.0005%/mA - maintains tight voltage control across dynamic FPGA core loads (1–250mA). |
Pinout & Package
SOT-223-6 package (6.5mm × 7.06mm) with exposed thermal pad (TAB = GND); optimized for >1W power dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply | Accepts 1.7–5.5V; connects directly to upstream DC/DC or battery; requires local 1µF ceramic if upstream source has high impedance. |
| OUT | Regulated output | Delivers stable 3.3V; no capacitor required for stability, but optional 1–10µF improves transient response. |
| GND | Ground reference | Common return for IN, OUT, EN, and NR; must be connected to exposed thermal pad for thermal performance. |
| EN | Enable control | Active-high TTL/CMOS-compatible; drives high (>1.7V) to enable, low (<0.5V) to shut down with <1µA quiescent current. |
| NR | Noise reduction | Connects external 0.01µF capacitor to GND to reduce output noise by ~2.4× - essential for RF subsystems. |
| N/C | No connect | Two unconnected pins (positions 2 and 3 on top view); must remain floating - no routing or soldering permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates without output capacitor - eliminates BOM cost, board space, and aging-related drift in wearables and medical patches. |
| Ultra-low dropout | 40mV typical at 250mA - enables use with 3.4V input sources like partially discharged Li-ion cells (3.0–3.6V range). |
| Reverse current blocking | <10µA reverse leakage - prevents cross-conduction in redundant power paths and avoids brownout during rail sequencing. |
| Low-noise architecture | 30µVRMS baseline + NR pin support - meets -150dBc/Hz phase noise targets for 2.4GHz BLE/Wi-Fi VCOs. |
| Thermal foldback protection | Current limit reduces to zero below 0.5VOUT - protects die during sustained short-circuit without external current-sense circuitry. |
Applications
| Portable RF Transceivers | Battery-Powered IoT Sensors |
|---|---|
Use Scenario: Powering 2.4GHz BLE radio ICs in coin-cell–operated asset trackers with intermittent transmit bursts. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying VCO, PA bias, and digital core - must maintain sub-10mV ripple during 200mA TX peaks. Use Value: 40mV dropout allows operation down to 3.34V input; 30µVRMS noise prevents EVM degradation; NR pin enables <13µVRMS under burst load. | Use Scenario: Regulating power for ultra-low-power MCU + environmental sensor stack in solar-charged remote weather stations. IC Role / Device Role / Timing Role: Always-on 3.3V rail for RTC, wake-up logic, and ADC reference - must draw <1µA in deep sleep. Use Value: Shutdown current <1µA extends 10-year battery life; no-output-capacitor design avoids electrolytic aging failure; thermal shutdown prevents field failures in desert deployments. |
| Post-Regulation for Buck Converters | FPGA Core Voltage Supply |
Use Scenario: Clean 3.3V rail downstream of a noisy 5V-to-3.3V buck converter powering analog front-end circuitry. IC Role / Device Role / Timing Role: Noise-filtering LDO isolating sensitive ADCs and op-amps from switching ripple. Use Value: PSRR of 58dB @100Hz and 37dB @10kHz suppresses buck ripple; NR pin further attenuates high-frequency switching artifacts. | Use Scenario: Point-of-load regulation for Spartan-7 FPGA I/O banks requiring stable 3.3V with fast transient response. IC Role / Device Role / Timing Role: Local 3.3V supply responding to 100mA step loads within 10µs to prevent I/O timing violations. Use Value: Excellent load transient response (±25mV deviation) with or without output cap; 0.0005%/mA load regulation holds voltage within ±0.125mV across full load range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLS850F3TAV50 | Automotive-grade AEC-Q100, 500mA rated, higher 120mV dropout, integrated watchdog timer | Requires automotive qualification and higher current; lacks NR pin and capacitor-free operation | Select for automotive infotainment head units needing functional safety compliance - not drop-in for consumer portables. |
| AP2202K-3.3TRG1 | 300mA rated, 250mV dropout, no NR pin, requires minimum 1µF output capacitor | Higher dropout limits input range; no noise-reduction capability; less suitable for RF VCOs | Choose for cost-sensitive industrial controls where noise is non-critical and board space allows output cap placement. |
Compared with TLS850F3TAV50 and AP2202K-3.3TRG1, the TPS73233DCQRG4 uniquely combines capacitor-free stability, 40mV dropout, and NR-pin–enabled ultra-low noise - making it the only option among the three qualified for battery-powered RF signal chains demanding both efficiency and spectral purity.
Availability
TPS73233DCQRG4 is available at Aetrix Electronics and suitable for portable RF transceivers, battery-powered IoT sensors, and FPGA I/O power delivery requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TPS73233DCQRG4 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 delivering analog and embedded processing solutions, with over 50 years of power management innovation and broad distribution infrastructure.
The TPS732 family is designed specifically for space-constrained, battery-operated applications requiring ultra-low noise, reverse-current blocking, and guaranteed stability without output capacitance - targeting portable medical devices, wireless sensors, and RF front-ends.
FAQ
What is the maximum input voltage rating for the TPS73233DCQRG4?
The TPS73233DCQRG4 has an absolute maximum input voltage of 6V, but its recommended operating range is 1.7V to 5.5V. Operation above 5.5V risks permanent damage per the Absolute Maximum Ratings table. For reliable 3.3V output, VIN must exceed 3.34V (3.3V + 40mV dropout) - making it ideal for single-cell Li-ion (3.0–4.2V) and 5V bus post-regulation.
Does the TPS73233DCQRG4 require an output capacitor to maintain stability?
No, the TPS73233DCQRG4 is explicitly designed for capacitor-free operation and remains stable with zero output capacitance. This is enabled by its NMOS voltage-follower topology and internal compensation. An optional 1–10µF ceramic capacitor may be added to improve load transient response, but it is never required for loop stability - a key differentiator versus traditional PMOS LDOs.
How does the NR (noise reduction) pin function on the TPS73233DCQRG4?
The NR pin on the TPS73233DCQRG4 connects to an internal 27kΩ resistor in series with the bandgap reference, forming a low-pass filter when a capacitor (typically 0.01µF) is placed from NR to GND. This reduces the dominant reference noise contribution, lowering total output noise from 30µVRMS to approximately 12.75µVRMS - critical for powering VCOs in Bluetooth and Wi-Fi radios.
What is the reverse leakage current specification for the TPS73233DCQRG4?
The TPS73233DCQRG4 specifies reverse leakage current (IREV) of 0.1µA typical and 10µA maximum when VIN ≤ VOUT and EN ≤ 0.5V. This ultra-low reverse current prevents backfeed in multi-rail systems - for example, avoiding discharge of a backup coin cell when main 3.3V rail fails - and is enabled by the NMOS pass device's inherent body-diode orientation.
Can the TPS73233DCQRG4 be used in automotive applications?
The TPS73233DCQRG4 is not AEC-Q100 qualified and is intended for commercial/industrial temperature range (–40°C to +125°C junction). While it operates across automotive ambient temperatures, it lacks automotive-specific qualifications such as PPAP documentation, enhanced ESD robustness (HBM ±2kV only), and zero-defect manufacturing traceability. For automotive use, TI recommends the pin-compatible TLS850F3TAV50 instead.
TPS73233DCQRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- TPS732xx
- Package/Case:
- SOT-223-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 0.15V @ 250mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 550 µA
- Current - Supply (Max):
- 950 µA
- PSRR:
- 58dB ~ 37dB (100Hz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-6
TPS73233DCQRG4 FAQ
1.How can I place an order for TPS73233DCQRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS73233DCQRG4 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 TPS73233DCQRG4 reliable?
The price and inventory of TPS73233DCQRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS73233DCQRG4 is usually 5 days.
3.What payment methods are accepted for TPS73233DCQRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS73233DCQRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS73233DCQRG4?
TPS73233DCQRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS73233DCQRG4 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 TPS73233DCQRG4?
For technical support, including TPS73233DCQRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS73233DCQRG4 requirements.
6.How does Aetrix verify that TPS73233DCQRG4 is sourced from the original manufacturer or authorized distributors?
All TPS73233DCQRG4 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 TPS73233DCQRG4 meets industry standards.
7.What is the process for return or replacement of TPS73233DCQRG4?
All TPS73233DCQRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS73233DCQRG4, 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 TPS73233DCQRG4 part is unused and in its original packaging.
Return procedure for TPS73233DCQRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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