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Texas Instruments TPS71728DSER
- Part No.:
- TPS71728DSER
- Manufacturer:
- Texas Instruments
- Package:
- 6-WFDFN
- Datasheet:
-
TPS71728DSER.pdf
- Description:
- IC REG LINEAR 2.8V 150MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
TPS71728DSER from Texas Instruments is a fixed-output, 2.8 V, 150-mA low-dropout (LDO) linear regulator in a 6-pin WSON package (2.0 mm × 2.0 mm), featuring ultra-high PSRR (70 dB at 1 kHz), low noise (30 µVRMS, 100 Hz–100 kHz), and 170 mV typical dropout at full load - designed for powering noise-sensitive analog and RF circuitry in portable wireless devices.
For engineers reviewing the TPS71728DSER datasheet, TPS71728DSER pinout, TPS71728DSER application, or TPS71728DSER equivalent, key selection criteria include its 2.8 V fixed output, 45 µA ground current at light load, compatibility with 1 µF ceramic output capacitance, and integrated noise reduction (NR) pin enabling <12.5 × VOUT µVRMS noise with 0.01 µF CNR.
Technical Context
The TPS71728DSER uses a PMOS pass device and high-gain BiCMOS error amplifier to achieve fast transient response and stable regulation down to zero load. Its architecture integrates a quick-start circuit that pre-charges the NR capacitor within ~160 µs, enabling rapid power-up while maintaining low output noise.
It features undervoltage lockout (UVLO) with 2.45 V rising threshold and 150 mV hysteresis, thermal shutdown at 160°C with 20°C hysteresis, and internal current limiting (200–575 mA). The NR pin filters bandgap reference noise, directly improving PSRR above 10 kHz and reducing integrated output noise by up to 7× versus no CNR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±3% over –40°C to 125°C, load, line, and process variation - ensures stable biasing for RF front-ends and image sensors without external feedback resistors. |
| Max Output Current | 150 mA continuous - sufficient to power dual-band RF transceivers or CMOS image sensor analog blocks. |
| Dropout Voltage | 170 mV typical at 150 mA - enables operation from 3.0 V input (e.g., single Li-ion cell post-regulation) while delivering 2.8 V output. |
| PSRR | 70 dB at 1 kHz, 67 dB at 100 kHz, 45 dB at 1 MHz (VIN–VOUT = 1 V) - suppresses switching noise from DC/DC converters feeding the LDO input. |
| Output Noise | 30 µVRMS (100 Hz–100 kHz) with 0.01 µF CNR - meets stringent noise requirements of ADC reference supplies and PLL VCO buffers. |
| Ground Current | 45 µA typical at 0.1 mA load - extends battery life in always-on sensor nodes and standby-mode subsystems. |
| Enable Threshold | VEN(high) = 1.2 V min (VIN ≤ 5.5 V) - compatible with 1.8 V GPIOs and low-voltage microcontrollers. |
Pinout & Package
TPS71728DSER is packaged in a thermally enhanced 6-pin WSON (DRV package), 2.0 mm × 2.0 mm body size with exposed thermal pad. Pin 5 is GND; Pin 6 is IN; Pin 1 is OUT; Pin 4 is EN; Pin 2 is NR; Pin 3 is N/C (no connection, may be tied to GND for improved thermal dissipation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 6) | Regulator input supply | Accepts 2.5–6.5 V; requires 0.1–1 µF ceramic bypass capacitor close to pin for stability and EMI suppression. |
| OUT (Pin 1) | Regulated output | Delivers 2.8 V; must be decoupled with ≥1 µF ceramic capacitor to GND for loop stability and transient response. |
| GND (Pin 5) | Power and signal reference | Primary return path; connects to PCB thermal pad for optimal heat dissipation and low-noise grounding. |
| EN (Pin 4) | Active-high enable control | Drives high (>1.2 V) to activate regulator; pulls low (<0.4 V) to reduce shutdown current to <1.5 µA. |
| NR (Pin 2) | Noise reduction filter node | Connects to 0.01 µF ceramic capacitor to GND to suppress bandgap noise and improve PSRR >10 kHz. |
| N/C (Pin 3) | Not connected | Internally unconnected; may be soldered to GND plane to enhance thermal performance without electrical impact. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise with NR pin | 30 µVRMS (100 Hz–100 kHz) using 0.01 µF CNR - eliminates need for secondary LC filtering in RF power rails. |
| High PSRR across wide bandwidth | 70 dB at 1 kHz and 67 dB at 100 kHz - rejects ripple from switchers operating at 1–100 kHz without additional filtering. |
| Fast startup with quick-start circuit | ~160 µs turn-on time with 0.01 µF CNR - supports rapid wake-up in duty-cycled IoT sensor nodes. |
| Zero-load stability | Stable with 0 mA output current - enables use in always-on bias supplies without minimum load resistor. |
| Thermal and current protection | Auto-recovering thermal shutdown (160°C trip, 140°C release) and foldback current limit - prevents damage during short-circuit or overload. |
Applications
| Camera Sensor Power | Mobile Phone RF Front-End |
|---|---|
|
Use Scenario: Supplying analog and digital cores of high-resolution CMOS image sensors in smartphones. IC Role / Device Role / Timing Role: Low-noise, fixed 2.8 V bias rail for sensor analog front-end (AFE) and phase-locked loop (PLL) clock generation circuitry. Use Value: 30 µVRMS noise and 70 dB PSRR prevent image fixed-pattern noise and timing jitter induced by baseband processor switching. |
Use Scenario: Powering 2.4 GHz/5 GHz WLAN and Bluetooth® transceiver ICs in compact handheld devices. IC Role / Device Role / Timing Role: Clean 2.8 V supply for RF power amplifiers (PAs), low-noise amplifiers (LNAs), and mixer bias networks. Use Value: 170 mV dropout allows direct regulation from 3.0 V system rail; high PSRR suppresses DC/DC converter ripple that degrades EVM and receiver sensitivity. |
| Wearable Health Monitor Analog Signal Chain | Industrial Wireless Sensor Node MCU Core |
|
Use Scenario: Providing precision bias to biopotential amplifiers (ECG/EEG) and 24-bit delta-sigma ADCs in wearable patches. IC Role / Device Role / Timing Role: Ultra-low-noise 2.8 V reference rail for analog signal conditioning and ADC voltage reference buffer. Use Value: 30 µVRMS noise ensures <1 LSB noise floor for 24-bit conversion; 45 µA quiescent current extends multi-day battery life. |
Use Scenario: Regulating power to ARM Cortex-M0+ microcontroller cores and sub-GHz RF SoCs in battery-operated IIoT nodes. IC Role / Device Role / Timing Role: Enable-controlled 2.8 V supply enabling deep-sleep mode with <1.5 µA shutdown current. Use Value: Active-high EN interface simplifies GPIO control; 150 mA capability supports burst transmit without brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS71728DSE | Same silicon, identical electrical specs, but in smaller 1.5 mm × 1.5 mm WSON-6 (DSE) package with higher RθJA (190.5°C/W). | Better suited for ultra-dense layouts where board area is constrained more than thermal budget. | Select TPS71728DSE only when footprint reduction outweighs thermal derating needs; DRV (2 mm × 2 mm) offers superior thermal performance. |
| MCP1703T-2802E/MB | 2.8 V fixed LDO with 250 mA rating, 600 mV dropout, 65 µA IQ, no NR pin - lower PSRR (60 dB @ 1 kHz) and higher noise (40 µVRMS). | Acceptable for less demanding analog rails where cost or availability drives selection over noise/PSRR. | Choose MCP1703T-2802E/MB only if PSRR >65 dB and noise <35 µVRMS are not required; lacks NR functionality for noise-critical paths. |
Compared with TPS71728DSER, TPS71728DSE saves 1.75 mm² board area but sacrifices ~120°C/W thermal resistance, while MCP1703T-2802E/MB trades 10 dB PSRR, +10 µVRMS noise, and no NR capability for broader availability and lower unit cost in non-RF applications.
Availability
TPS71728DSER is available at Aetrix Electronics and suitable for camera sensor power, mobile RF front-end biasing, and wearable health monitor analog signal chains requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS71728DSER 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and digital signal technologies for industrial, automotive, and consumer markets.
The TPS717 family was engineered specifically for ultra-low-noise, high-PSRR power delivery in space-constrained, battery-powered RF and imaging systems - prioritizing noise performance, small footprint, and fast transient response over raw current capacity.
FAQ
What is the minimum input voltage required for TPS71728DSER to regulate 2.8 V output?
The minimum input voltage for TPS71728DSER is determined by its dropout voltage: VIN(min) = VOUT + VDO. With 170 mV typical dropout at 150 mA, VIN must be ≥2.97 V to maintain regulation at full load. However, per datasheet recommended conditions, absolute minimum VIN is 2.5 V - meaning TPS71728DSER cannot sustain 2.8 V output below ~2.97 V under load, though UVLO (2.45 V) may allow startup from lower voltages before regulation begins.
Does TPS71728DSER require an external feedback resistor network?
No, TPS71728DSER does not require external feedback resistors because it is a fixed-output variant (2.8 V). The feedback node (FB) is internally connected; the NR pin serves only for noise reduction capacitor attachment. External resistors are needed only for adjustable versions like TPS71701 - not for TPS71728DSER.
Can TPS71728DSER operate without an output capacitor?
No, TPS71728DSER requires a minimum 1 µF ceramic output capacitor connected from OUT to GND for stability, as specified in the datasheet. Omitting this capacitor risks oscillation, poor transient response, and potential damage. The device is optimized for 1–100 µF ceramic capacitors; tantalum or aluminum electrolytics are not recommended due to ESR and aging effects.
How does the NR pin on TPS71728DSER reduce output noise?
The NR pin on TPS71728DSER connects to a dedicated noise reduction capacitor (CNR) that filters high-frequency noise from the internal 1.20-V bandgap reference. With 0.01 µF CNR, TPS71728DSER achieves 12.5 × VOUT µVRMS (35 µVRMS for 2.8 V), reducing total integrated noise by up to 7× versus no CNR. The quick-start circuit charges CNR within ~160 µs at power-up.
Is TPS71728DSER compatible with 1.8 V GPIO enable signals?
Yes, TPS71728DSER is compatible with 1.8 V GPIOs: its EN pin has a guaranteed VEN(high) threshold of 1.2 V (min) when VIN ≤ 5.5 V, well below 1.8 V logic high. With 1.8 V applied to EN, the device reliably enables; leakage into EN is <1.0 µA, ensuring minimal loading on the driving GPIO.
TPS71728DSER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- 70dB ~ 45dB (100Hz ~ 1MHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (1.5x1.5)
TPS71728DSER FAQ
1.How can I place an order for TPS71728DSER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS71728DSER 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 TPS71728DSER reliable?
The price and inventory of TPS71728DSER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS71728DSER is usually 5 days.
3.What payment methods are accepted for TPS71728DSER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS71728DSER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS71728DSER?
TPS71728DSER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS71728DSER 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 TPS71728DSER?
For technical support, including TPS71728DSER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS71728DSER requirements.
6.How does Aetrix verify that TPS71728DSER is sourced from the original manufacturer or authorized distributors?
All TPS71728DSER 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 TPS71728DSER meets industry standards.
7.What is the process for return or replacement of TPS71728DSER?
All TPS71728DSER units undergo pre-shipment inspection (PSI). If there is an issue with TPS71728DSER, 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 TPS71728DSER part is unused and in its original packaging.
Return procedure for TPS71728DSER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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