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Texas Instruments TPS7A4525DCQR
- Part No.:
- TPS7A4525DCQR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-223-6
- Datasheet:
-
TPS7A4525DCQR.pdf
- Description:
- IC REG LINEAR 2.5V 1.5A SOT223-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,393
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Product details
Overview
TPS7A4525DCQR from Texas Instruments is a fixed-output 2.5-V, 1.5-A low-dropout (LDO) voltage regulator optimized for fast transient response and low-noise RF 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 power delivery in wireless infrastructure and industrial control systems.
For engineers reviewing the TPS7A4525DCQR datasheet, TPS7A4525DCQR pinout, TPS7A4525DCQR application, or TPS7A4525DCQR equivalent, key selection criteria include its 2.5-V fixed output, 35 μVRMS noise (10 Hz–100 kHz), 68 dB ripple rejection at 1 kHz, reverse-battery and reverse-current protection, and SOT-223-6 package compatibility with thermal design constraints.
Technical Context
The TPS7A4525DCQR uses a PMOS pass element architecture enabling controlled quiescent current in dropout - unlike NMOS-based LDOs whose IQ rises sharply near dropout. Its error amplifier features Kelvin-sense capability via the SENSE pin, allowing remote feedback to compensate for PCB trace resistance up to ~100 mΩ without sacrificing regulation accuracy.
Internal protection includes thermal shutdown, current limiting (1.6 A typical), reverse-battery protection (withstands –20 V on IN), and reverse-current blocking (600–1000 μA max reverse output current). The device achieves fast transient response through optimized loop compensation and low output impedance, validated by load-step testing at 1.5 A with 10-μF ceramic output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±1% over –40°C to +125°C; ensures stable core/sensor biasing without external resistors. |
| Max Output Current | 1.5 A continuous; supports high-current analog/RF ICs like transceivers and ADCs without derating at TA ≤ 85°C. |
| Dropout Voltage | 300 mV at 1.5 A (25°C); enables operation from 2.8-V input rails (e.g., Li-ion single-cell + margin) while maintaining regulation. |
| Output Noise | 35 μVRMS (10 Hz–100 kHz); meets stringent RF supply requirements for LNAs and mixers without added filtering. |
| Ripple Rejection | 68 dB at 1 kHz; suppresses switching noise from upstream DC/DC converters feeding sensitive analog circuitry. |
| Quiescent Current | 1 mA active / <1 μA shutdown; extends battery life in always-on industrial sensors and IoT edge nodes. |
| Input Voltage Range | 2.8 V to 20 V; accommodates wide-input industrial supplies and unregulated adapter outputs. |
Pinout & Package
SOT-223-6 (DCQ) package: 6.50 mm × 7.06 mm body, exposed thermal pad connected to GND; requires soldered thermal pad for rated 50.5°C/W junction-to-ambient performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SHDN | Shutdown control input | Active-low logic interface; accepts 3-V/5-V or open-collector signals; pulls device into <1-μA shutdown state when grounded. |
| 2: IN | Main power input | Accepts 2.8–20 V; reverse-battery protected - blocks current flow if VIN < 0 V, safeguarding downstream circuitry. |
| 3: GND | Power ground reference | Primary return path; internal thermal pad (pin 6) is electrically tied to this pin and must be soldered for thermal compliance. |
| 4: OUT | Regulated output | Delivers 2.5 V @ 1.5 A; stable with ≥10-μF ceramic capacitor; supports Kelvin sensing via SENSE pin for precision load regulation. |
| 5: SENSE | Kelvin feedback input | Connects to load-side output node to cancel IR drop across PCB traces; improves load regulation by up to 30 mV at 1.5 A. |
| 6: GND | Thermal pad ground | Exposed pad (SOT-223 bottom surface); mandatory PCB connection for thermal management and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | Stabilizes within <10 μs after 1-A load step (per Figure 27); prevents brownout in burst-mode RF transmitters. |
| No external protection diodes required | Integrated reverse-battery and reverse-current protection eliminate discrete diodes, reducing BOM count and board area. |
| Controlled IQ in dropout | Quiescent current remains stable near dropout - avoids thermal runaway and enables predictable low-voltage operation. |
| Stable with low-ESR ceramics | Operates unconditionally stable with 10-μF X7R/X5R ceramics; no series ESR or parallel electrolytic capacitor needed. |
| 1% initial accuracy | Ensures precise 2.5-V bias for ADC references, DACs, and analog front-ends without calibration overhead. |
Applications
| Wireless Base Station Power | Industrial Sensor Node |
|---|---|
|
Use Scenario: Powering RF transceiver ICs (e.g., AFE79xx) in 4G/5G small cells where supply noise directly impacts EVM and ACLR. IC Role / Device Role / Timing Role: Primary 2.5-V LDO supplying analog signal chain; provides clean, low-noise rail decoupled from noisy DC/DC converters. Use Value: 35 μVRMS noise and 68 dB ripple rejection maintain <–45 dBc ACLR under full TX load, eliminating need for additional LC filtering. |
Use Scenario: Battery-powered condition monitoring sensor with ultra-low-power MCU and precision analog front-end. IC Role / Device Role / Timing Role: Main system regulator delivering 2.5 V to ADC reference and op-amps; enters <1-μA shutdown during sleep cycles. Use Value: 1-mA active IQ and sub-μA shutdown extend 2000-mAh Li-SOCl₂ battery life to >10 years in 1-minute wake-up intervals. |
| Test & Measurement Equipment | Automated Test Equipment (ATE) |
|
Use Scenario: Precision voltage reference supply in bench multimeters requiring long-term stability and low drift. IC Role / Device Role / Timing Role: Low-drift 2.5-V source for bandgap reference buffers; Kelvin-sense compensates for PCB trace resistance in high-accuracy shunt paths. Use Value: 1% accuracy over temperature and 2.5-mV load regulation (1 mA → 1.5 A) ensure <10-ppm measurement uncertainty over full operating range. |
Use Scenario: Channel-specific analog supply in modular ATE systems where multiple DUTs require independent, noise-isolated rails. IC Role / Device Role / Timing Role: Per-channel LDO enabling independent enable/disable and fault isolation; SENSE pin allows remote sensing at DUT connector. Use Value: Reverse-current blocking prevents backfeeding between channels during hot-swap events, avoiding cross-talk and false test failures. |
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; 1-A rating; 4-μVRMS noise; WSON-10 package. | Requires external resistor divider; lower noise but reduced current capacity; unsuitable for 1.5-A loads. | Select when ultra-low noise (<5 μVRMS) and adjustable output outweigh current and package constraints. |
| LT3045EDD#PBF | 4-V to 20-V input; 500-mA output; 0.8-μVRMS noise; 10-pin DFN package with SET pin. | Lower current, higher cost, superior PSRR (76 dB @ 1 MHz); not pin-compatible; needs separate reference buffer. | Choose for sub-1-μVRMS noise-critical applications (e.g., high-resolution audio ADCs) where 500-mA output suffices. |
Compared with TPS7A4525DCQR, TPS7A4701RGWR offers lower noise but sacrifices 33% output current and fixed-voltage simplicity, while LT3045EDD#PBF delivers exceptional noise performance at half the current and significantly higher BOM cost - making TPS7A4525DCQR optimal for cost-sensitive, high-current, 2.5-V RF/analog systems.
Availability
TPS7A4525DCQR is available at Aetrix Electronics and suitable for wireless infrastructure, industrial sensor networks, and automated test equipment requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS7A4525DCQR 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 innovation focused on performance, reliability, and system-level integration.
The TPS7A45xx product line was designed specifically for high-performance RF and precision analog applications demanding ultra-low noise, fast transient response, and robust protection - targeting wireless infrastructure, test equipment, and industrial sensing.
FAQ
What is the maximum input voltage for the TPS7A4525DCQR?
The TPS7A4525DCQR supports an absolute maximum input voltage of 20 V, with recommended operation from 2.8 V (VOUT + VDO) up to 20 V. Exceeding 20 V risks permanent damage per Absolute Maximum Ratings. For reliable 2.5-V output at 1.5 A, minimum input is 2.8 V - verified by electrical characteristics tables showing VIN ≥ 3.5 V across full temperature and load range.
Does the TPS7A4525DCQR require an external capacitor on the SHDN pin?
No, the TPS7A4525DCQR does not require an external capacitor on the SHDN pin. The SHDN input has low bias current (3 μA typical) and is compatible with direct connection to microcontroller GPIO or open-collector drivers. A pullup resistor (e.g., 100 kΩ to VIN) is required only if using open-collector logic; no bypass capacitor is specified or needed for noise immunity.
Can the TPS7A4525DCQR be used with a 10-μF ceramic output capacitor?
Yes, the TPS7A4525DCQR is explicitly characterized and guaranteed stable with a minimum 10-μF ceramic output capacitor (X7R/X5R), as stated in the datasheet's "Stable With 10-μF Ceramic Output Capacitor" feature and Electrical Characteristics section. Larger values improve transient response but are not required for stability.
What protection features are integrated into the TPS7A4525DCQR?
The TPS7A4525DCQR integrates reverse-battery protection (withstands –20 V on IN), reverse-current protection (blocks current flow from OUT to IN), thermal shutdown, and current limiting (1.6 A typical). These eliminate the need for external diodes or fuses in battery-powered and dual-supply systems, reducing solution size and failure points.
Is the SENSE pin on the TPS7A4525DCQR mandatory for basic operation?
No, the SENSE pin on the TPS7A4525DCQR is not mandatory for basic operation - it can be connected directly to the OUT pin for standard regulation. However, routing SENSE to the load point enables Kelvin sensing, which compensates for voltage drop across PCB traces and improves load regulation accuracy by up to 30 mV at full 1.5-A load.
TPS7A4525DCQR 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):
- 2.5V
- 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
TPS7A4525DCQR FAQ
1.How can I place an order for TPS7A4525DCQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7A4525DCQR 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 TPS7A4525DCQR reliable?
The price and inventory of TPS7A4525DCQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7A4525DCQR is usually 5 days.
3.What payment methods are accepted for TPS7A4525DCQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7A4525DCQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7A4525DCQR?
TPS7A4525DCQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7A4525DCQR 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 TPS7A4525DCQR?
For technical support, including TPS7A4525DCQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7A4525DCQR requirements.
6.How does Aetrix verify that TPS7A4525DCQR is sourced from the original manufacturer or authorized distributors?
All TPS7A4525DCQR 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 TPS7A4525DCQR meets industry standards.
7.What is the process for return or replacement of TPS7A4525DCQR?
All TPS7A4525DCQR units undergo pre-shipment inspection (PSI). If there is an issue with TPS7A4525DCQR, 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 TPS7A4525DCQR part is unused and in its original packaging.
Return procedure for TPS7A4525DCQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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