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Texas Instruments TPS7A4533DCQR
- Part No.:
- TPS7A4533DCQR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-223-6
- Datasheet:
-
TPS7A4533DCQR.pdf
- Description:
- IC REG LINEAR 3.3V 1.5A SOT223-6
- Quantity:
- Payment:
- Shipping:
Inventory:8,131
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Product details
Overview
TPS7A4533DCQR from Texas Instruments is a fixed-output 3.3-V, 1.5-A low-dropout (LDO) voltage regulator optimized for fast transient response and low-noise RF power supply applications. It delivers 1.5 A with 300 mV dropout at full load, maintains 1% output accuracy over temperature, and operates with only 1 mA quiescent current-dropping to <1 μA in shutdown. Its stable operation with 10-μF ceramic output capacitors enables compact, high-reliability designs in wireless infrastructure and industrial systems.
For engineers reviewing the TPS7A4533DCQR datasheet, TPS7A4533DCQR pinout, TPS7A4533DCQR application, or TPS7A4533DCQR equivalent, key selection criteria include its 3.3-V fixed output, SOT-223-6 package thermal performance (RθJA = 50.5°C/W), 35 μVRMS output noise (10 Hz–100 kHz), 68 dB ripple rejection at 1 kHz, and Kelvin-sense capability via the SENSE pin for precision load regulation.
Technical Context
The TPS7A4533DCQR uses a PMOS pass element architecture enabling controlled quiescent current in dropout and eliminating the need for external protection diodes. Its error amplifier features a dedicated SENSE pin that supports remote sensing to compensate for PCB trace resistance up to several hundred milliohms-critical for maintaining ±1% regulation under dynamic 1.5-A loads.
Internal protection includes reverse-battery protection, reverse-current blocking, thermal shutdown, and current limiting (1.6 A typical). The device achieves fast transient response through optimized loop compensation and low output impedance, verified by load-step test waveforms showing sub-50-μs recovery with ≤50-mV undershoot/overshoot at 1.5-A steps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±1% (25°C), ±1.33% (–40°C to +125°C) - ensures stable logic-level supply for 3.3-V microcontrollers and RF ICs. |
| Max Output Current | 1.5 A continuous - supports high-current digital loads without derating at moderate ambient temperatures. |
| Dropout Voltage | 300 mV at 1.5 A (25°C) - enables operation from 3.6-V input (e.g., Li-ion battery at end-of-discharge) while sustaining 3.3-V rail. |
| Output Noise | 35 μVRMS (10 Hz–100 kHz) - meets stringent RF biasing requirements for LNAs, mixers, and PLL VCOs. |
| Ripple Rejection | 68 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Quiescent Current | 1 mA active, <1 μA shutdown - extends battery life in always-on IoT sensors and portable radios. |
| Input Voltage Range | 4.3 V to 20 V - accommodates wide-input industrial supplies and unregulated adapter outputs. |
Pinout & Package
SOT-223-6 (DCQ) package with exposed thermal pad connected to GND; 6.50 mm × 7.06 mm body size; requires PCB copper pour for thermal management per RθJB = 5.1°C/W spec.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SHDN | Active-low enable control | Pulled high to VIN for normal operation; driven low (<0.75 V) to enter <1-μA shutdown - compatible with 1.8-V/3.3-V/5-V logic. |
| 2: IN | Main power input | Accepts 4.3–20 V; reverse-battery protected - no external diode needed even if battery is inserted backward. |
| 3: GND | Power ground reference | Primary return path; internal connection to exposed thermal pad - must be soldered to large PCB copper area for thermal performance. |
| 4: OUT | Regulated 3.3-V output | Delivers up to 1.5 A; requires ≥10-μF ceramic capacitor at pin for stability - enables compact, low-ESR filtering. |
| 5: SENSE | Remote voltage sense input | Connects directly to load point to cancel IR drop in PCB traces - improves regulation accuracy to ±1% under 1.5-A load step. |
| 6: GND | Secondary ground terminal | Dedicated low-impedance return for sense path - isolates feedback ground from high-current GND paths to reduce noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | Sub-50-μs recovery from 1.5-A load step with ≤50-mV deviation - prevents brownout in burst-mode processors and RF transceivers. |
| Kelvin sensing | SENSE pin referenced to load point - eliminates up to 100 mΩ of trace resistance impact on output regulation accuracy. |
| No external protection diodes | Integrated reverse-battery and reverse-current protection - reduces BOM count and board space in battery-powered designs. |
| Stable with low-ESR ceramics | Works with 10-μF X7R/X5R ceramic capacitors - avoids bulky, aging-prone tantalum or aluminum electrolytics. |
| Controlled dropout IQ | Quiescent current remains flat in dropout - unlike many LDOs, avoids sudden IQ rise that destabilizes thermal design. |
Applications
| Wireless Base Station RF Power Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powers RF front-end components (LNAs, mixers, VCOs) in 4G/5G macrocell radios where supply noise directly impacts EVM and ACLR. IC Role / Device Role / Timing Role: Low-noise post-regulator delivering clean 3.3-V bias from noisy switched-mode intermediate bus. Use Value: 35 μVRMS noise and 68 dB ripple rejection maintain RF signal integrity; Kelvin sensing ensures stable voltage at antenna module connector. |
Use Scenario: Supplies isolated 3.3-V logic rails for digital I/O expansion cards in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: High-current, fault-tolerant LDO providing regulated power to FPGA configuration circuitry and level-shifted communication interfaces. Use Value: Reverse-battery and reverse-current protection prevent damage during hot-swap maintenance; 1.5-A capacity supports multiple parallel I/O drivers. |
| Medical Imaging Sensor Interface | Automotive ADAS Camera Module |
Use Scenario: Powers high-resolution analog sensor signal chains (ADC drivers, PGA stages) in portable ultrasound probes requiring ultra-low noise and precise gain stability. IC Role / Device Role / Timing Role: Precision analog supply rail with tight DC accuracy and minimal broadband noise contribution. Use Value: 1% output accuracy over –40°C to +125°C ensures consistent sensor calibration; low dropout enables use with single-cell LiFePO4 battery input. |
Use Scenario: Supplies image sensor and ISP core voltage in rear-view or surround-view cameras mounted near engine compartments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Automotive-grade LDO delivering robust 3.3-V power under load dump and cold-crank conditions. Use Value: Thermal shutdown and current limit protect against shorted flex cables; SOT-223 package withstands 150°C junction temperature per AEC-Q100 stress testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4701RGWR | Adjustable 1.4–20.5 V output; lower 4-μVRMS noise; 1-A max current; WSON-10 package. | Better for ultra-low-noise analog biasing but lacks 1.5-A drive and fixed 3.3-V option. | Choose TPS7A4701RGWR only when adjustable output and sub-5-μV noise are mandatory; otherwise TPS7A4533DCQR provides higher current and pin-compatible fixed-voltage simplicity. |
| MCP1826T-3302E/DB | 3.3-V fixed; 1.5-A; 600-mV dropout; 85-μVRMS noise; SOT-223-4 package (no SENSE pin). | Lacks Kelvin sensing and has higher noise/dropout - suitable for cost-sensitive non-RF applications. | Select MCP1826T-3302E/DB for basic digital rail regulation where trace IR drop is negligible and noise <60 μVRMS is acceptable; TPS7A4533DCQR preferred for RF or precision analog loads. |
Compared with TPS7A4701RGWR and MCP1826T-3302E/DB, the TPS7A4533DCQR uniquely balances 1.5-A output, 300-mV dropout, 35-μVRMS noise, and Kelvin sensing in a standard SOT-223-6 footprint-making it optimal for RF and industrial systems demanding both performance and layout flexibility.
Availability
TPS7A4533DCQR is available at Aetrix Electronics and suitable for wireless infrastructure, industrial PLCs, and medical imaging equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS7A4533DCQR 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 and embedded processing technologies, with decades of expertise in power management IC design and high-reliability manufacturing.
The TPS7A45xx series was engineered specifically for RF and high-precision analog applications demanding ultra-low noise, fast transient response, and robust fault protection-targeting wireless infrastructure, test equipment, and industrial automation markets.
FAQ
What is the maximum input voltage rating for the TPS7A4533DCQR?
The TPS7A4533DCQR has an absolute maximum input voltage of 20 V, with recommended operating range from 4.3 V to 20 V. Exceeding 20 V risks permanent damage. At 20 V input, the output must remain ≥0 V to avoid violating the ±20-V input-to-output differential limit specified in the Absolute Maximum Ratings table.
Does the TPS7A4533DCQR require an external capacitor on the SHDN pin?
No, the TPS7A4533DCQR does not require an external capacitor on the SHDN pin. The pin accepts clean DC logic levels (0 V for shutdown, ≥2 V for active); adding capacitance may slow turn-on/off timing and is unnecessary per TI's layout guidelines and functional mode description.
Can the TPS7A4533DCQR be used without connecting the SENSE pin?
Yes-the TPS7A4533DCQR functions correctly with SENSE tied directly to OUT, which is the default configuration for fixed-output operation. Leaving SENSE unconnected is not allowed; it must be connected to OUT or to the load for Kelvin sensing. Open SENSE causes regulation failure.
What thermal performance can be expected from the TPS7A4533DCQR in SOT-223-6 package?
In the DCQ (SOT-223-6) package, the TPS7A4533DCQR has RθJA = 50.5°C/W (JEDEC high-K board) and RθJB = 5.1°C/W. With a 200-mm² 2-oz copper pour under the exposed pad, junction-to-board thermal resistance drops significantly-enabling 1.5-A operation up to +85°C ambient without forced air.
Is the TPS7A4533DCQR qualified for automotive applications?
The TPS7A4533DCQR is not AEC-Q100 qualified. While it operates across –40°C to +125°C and includes automotive-relevant protections (reverse-battery, thermal shutdown), it lacks formal automotive qualification. For ADAS or infotainment systems requiring AEC-Q100, consider TI's TPS7B87xx-Q1 family instead.
TPS7A4533DCQR Specifications
- 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):
- 20V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.45V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 1.5 mA
- Current - Supply (Max):
- 90 mA
- PSRR:
- 68dB (120Hz)
- 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
TPS7A4533DCQR FAQ
1.How can I place an order for TPS7A4533DCQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7A4533DCQR 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 TPS7A4533DCQR reliable?
The price and inventory of TPS7A4533DCQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7A4533DCQR is usually 5 days.
3.What payment methods are accepted for TPS7A4533DCQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7A4533DCQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7A4533DCQR?
TPS7A4533DCQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7A4533DCQR 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 TPS7A4533DCQR?
For technical support, including TPS7A4533DCQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7A4533DCQR requirements.
6.How does Aetrix verify that TPS7A4533DCQR is sourced from the original manufacturer or authorized distributors?
All TPS7A4533DCQR 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 TPS7A4533DCQR meets industry standards.
7.What is the process for return or replacement of TPS7A4533DCQR?
All TPS7A4533DCQR units undergo pre-shipment inspection (PSI). If there is an issue with TPS7A4533DCQR, 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 TPS7A4533DCQR part is unused and in its original packaging.
Return procedure for TPS7A4533DCQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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