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Texas Instruments TPS77501PWP
- Part No.:
- TPS77501PWP
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS77501PWP.pdf
- Description:
- IC REG LIN POS ADJ 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:420
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Product details
Overview
TPS77501PWP from Texas Instruments is an adjustable 500mA low-dropout (LDO) voltage regulator with open-drain RESET output, PMOS pass element, 169mV typical dropout at 500mA, ±2% output voltage accuracy over line/load/temperature, and 85µA typical quiescent current. It operates from 2.7V to 10V input and delivers 1.5V–5.5V output, used in FPGA core power, DSP I/O rails, and battery-powered microprocessor systems.
For engineers reviewing the TPS77501PWP datasheet, TPS77501PWP pinout, TPS77501PWP application, or TPS77501PWP equivalent, key selection criteria include its 20-pin HTSSOP PowerPAD™ package, RESET timeout delay (200ms), trip threshold (92–98% VOUT), thermal shutdown (150°C), and compatibility with 10µF low-ESR output capacitors.
Technical Context
The TPS77501PWP uses a PMOS pass transistor enabling ultralow, load-independent quiescent current (85µA typ) and linear dropout behavior proportional to output current. Its internal 1.183V reference feeds a high-impedance feedback amplifier for precise output regulation via external resistor divider on FB pin.
RESET functionality is implemented with an internal comparator monitoring VOUT against 92–98% of nominal output, triggering an open-drain output after a fixed 200ms delay upon undervoltage detection. The device supports zero-load operation and requires no minimum output capacitance beyond stability constraints (10µF, 50mΩ–1.5Ω ESR).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 500mA maximum continuous; internally current-limited to ~1.7A during fault |
| Dropout Voltage | 169mV typical at 500mA - enables regulation with minimal VIN–VOUT headroom |
| Quiescent Current | 85µA typical over full 0–500mA load range - extends battery life in portable systems |
| Output Accuracy | ±2% over line, load, and temperature (–40°C to +125°C) - ensures reliable logic-level compliance |
| RESET Delay | 200ms fixed timeout - provides clean power-on reset timing for microcontrollers |
| Input Voltage Range | 2.7V to 10V - supports wide-input industrial and battery-derived supplies |
| Output Voltage Range | 1.5V to 5.5V (adjustable via FB divider) - covers core, I/O, and analog rail requirements |
Pinout & Package
TPS77501PWP is housed in a 20-pin HTSSOP (PWP) package with exposed thermal pad (PowerPAD™) requiring soldering to PCB ground plane for thermal management. Pin count, layout, and thermal design follow TI's recommended copper heat sink pattern on multilayer boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 9, 10, 11, 12, 19, 20 | GND / HSINK | Ground return and thermal path - all must be connected to PCB ground plane |
| 4, 8, 17, 18 | NC | No internal connection - leave unconnected |
| 5 | EN | Negative-enable input - TTL-compatible; drives regulator into 1µA shutdown when high |
| 7 | FB/NC | Feedback input for adjustable output - connects to resistor divider; NC on fixed versions |
| 6, 7 | IN | Main input voltage supply - accepts 2.7V–10V; bypass with 0.1µF ceramic if > few inches from source |
| 13, 14 | OUT | Regulated output - requires 10µF low-ESR capacitor (50mΩ–1.5Ω) for stability |
| 16 | RESET/PG | Open-drain RESET output - active-low, 200ms delay, 0.15V max VOL at 1mA |
Key Features
| Feature | Design Value |
|---|---|
| PMOS Pass Element | Enables 85µA load-independent quiescent current and linear dropout behavior |
| 200ms RESET Timeout | Guarantees deterministic power-on reset timing without external RC networks |
| Zero-Load Stability | Operates stably with no minimum output current - simplifies design for intermittent loads |
| Thermal Shutdown | Activates at +150°C junction temperature and auto-recovers at +130°C - prevents permanent damage |
| Low-ESR Capacitor Support | Stable with 10µF tantalum, aluminum, or ceramic caps (ESR 50mΩ–1.5Ω) - reduces BOM cost and footprint |
Applications
| FPGA Core Power | DSP I/O Voltage Regulation |
|---|---|
Use Scenario: Supplying configurable logic core voltage (e.g., 1.2V–1.8V) for Xilinx or Intel FPGAs during dynamic reconfiguration. IC Role / Device Role / Timing Role: Adjustable LDO providing tightly regulated, low-noise core rail with fast transient response to logic switching currents. Use Value: 500mA output and 169mV dropout enable efficient operation from intermediate bus voltages (e.g., 3.3V → 1.5V), minimizing heat dissipation. | Use Scenario: Delivering stable I/O supply (e.g., 3.3V) to TI C6000 or Analog Devices SHARC DSPs interfacing with external memory or peripherals. IC Role / Device Role / Timing Role: Primary I/O rail regulator with RESET signal synchronized to power-up sequencing requirements. Use Value: ±2% output accuracy ensures reliable interface timing margins; 200ms RESET delay meets JEDEC JESD84-A44B power-on reset specifications. |
| Battery-Powered Microcontroller Systems | Industrial Sensor Node Power |
Use Scenario: Powering ARM Cortex-M or PIC microcontrollers in handheld meters or wireless sensors operating from single-cell Li-ion or dual-cell alkaline. IC Role / Device Role / Timing Role: Main system regulator with integrated undervoltage reset to prevent firmware corruption during brownout. Use Value: 85µA quiescent current extends battery life in sleep mode; RESET asserts at 92–98% VOUT to provide early warning before functional failure. | Use Scenario: Providing isolated 2.5V or 3.3V rail for precision ADCs, op-amps, and digital isolators in factory-floor sensor transmitters. IC Role / Device Role / Timing Role: Low-noise, thermally robust LDO supporting extended temperature operation (–40°C to +125°C). Use Value: HTSSOP PowerPAD™ package with 23.5mW/°C derating enables 1.9W dissipation at TA = +70°C - sufficient for 500mA @ 3.3V drop across 2.7V–10V input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4700RGWR | Lower noise (4.7µVRMS), higher PSRR (78dB @ 1kHz), but 200mA max output and 10-pin QFN package | Preferred for ultra-low-noise analog rails (e.g., precision ADC reference); not suitable for >200mA digital loads | Select TPS7A4700RGWR only when noise/PSRR outweighs current capability and board space constraints |
| LP3878MRX-ADJ | Same 500mA rating and adjustable output, but uses PNP pass element (higher IQ: 1.5mA), no RESET, SO-8 package | Lacks power-monitoring function; less efficient in battery systems due to higher quiescent current | Choose LP3878MRX-ADJ only when RESET is unnecessary and SO-8 footprint is mandatory |
Compared with TPS7A4700RGWR, TPS77501PWP delivers 2.5× higher output current and integrated RESET but trades off 73dB vs 78dB PSRR and 53µVRMS vs 4.7µVRMS noise. Against LP3878MRX-ADJ, it achieves 18× lower quiescent current and adds fault monitoring - critical for energy-constrained designs.
Availability
TPS77501PWP is available at Aetrix Electronics and suitable for FPGA core power, DSP I/O regulation, and battery-powered microcontroller systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS77501PWP 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 ICs, with decades of LDO design heritage and broad industrial qualification.
The TPS775xx family was engineered for high-current, low-quiescent-power applications demanding accurate voltage regulation, fast transient response, and integrated power-monitoring - especially in portable, automotive, and industrial control systems.
FAQ
What is the maximum input voltage rating for the TPS77501PWP?
The TPS77501PWP has an absolute maximum input voltage rating of +13.5V, but its recommended operating input range is 2.7V to 10V. Exceeding 10V may degrade long-term reliability or trigger overvoltage stress not covered by specification limits. Always maintain VIN ≤ 10V under normal operation to ensure compliance with electrical characteristics and thermal performance data in the SLVS232J datasheet.
Does the TPS77501PWP require an external pull-up resistor on the RESET pin?
Yes, the TPS77501PWP RESET pin is open-drain and requires an external pull-up resistor to a valid logic-high voltage (e.g., VOUT or another system rail). Typical values range from 10kΩ to 100kΩ. Without pull-up, the RESET signal remains floating and cannot drive downstream reset circuitry. The datasheet specifies a maximum low-level output voltage of 0.4V at 1mA sink current, confirming active-pull-down capability.
Can the TPS77501PWP operate without any output load connected?
Yes, the TPS77501PWP is explicitly characterized for zero-load operation and remains stable with no minimum output current requirement. This is enabled by its PMOS pass architecture and internal compensation optimized for 10µF output capacitors. Unlike many bipolar-based LDOs, it does not need a dummy load resistor to maintain regulation or avoid oscillation - simplifying designs for intermittently active subsystems.
What thermal derating applies to the TPS77501PWP in a high-K PCB configuration?
In a high-K PCB configuration (8-layer board with thermal planes), the TPS77501PWP has a thermal derating factor of 57.9mW/°C above +25°C ambient, with 3200mW dissipation at +70°C and 2300mW at +85°C. This assumes TI's recommended copper heat sink pattern per SLMA002. Actual performance depends on local copper area, airflow, and adjacent heat sources - always verify junction temperature using TJ = TA + (PD × θJA).
How is the output voltage set on the TPS77501PWP?
The TPS77501PWP output voltage is set using an external resistor divider between OUT, FB, and GND. With a fixed internal reference of 1.183V, VOUT = 1.183V × (1 + R1/R2). TI recommends R2 = 110kΩ for ~10µA divider current; R1 is then calculated per target VOUT. For example, 3.3V output requires R1 ≈ 196kΩ. The FB pin's high impedance minimizes loading error, but routing should avoid noisy traces to prevent regulation instability.
TPS77501PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- -
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (100Hz)
- Control Features:
- Enable, Reset
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS77501PWP FAQ
1.How can I place an order for TPS77501PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS77501PWP 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 TPS77501PWP reliable?
The price and inventory of TPS77501PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS77501PWP is usually 5 days.
3.What payment methods are accepted for TPS77501PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS77501PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS77501PWP?
TPS77501PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS77501PWP 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 TPS77501PWP?
For technical support, including TPS77501PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS77501PWP requirements.
6.How does Aetrix verify that TPS77501PWP is sourced from the original manufacturer or authorized distributors?
All TPS77501PWP 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 TPS77501PWP meets industry standards.
7.What is the process for return or replacement of TPS77501PWP?
All TPS77501PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS77501PWP, 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 TPS77501PWP part is unused and in its original packaging.
Return procedure for TPS77501PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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