TPS7A9401DSCR Texas Instruments Integrated Circuit (Small Outline No-lead) In Stock
TPS7A9401DSCR is a 1 A ultra-low noise, ultra-high PSRR adjustable LDO RF voltage regulator by Texas Instruments, in a 10-pin SON package. Key specs: 1.7 V to 5.7 V input range, 0.15 V typical dropout, adjustable output, 10-pin WSON package. From $2.40, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline No-lead
- Pin Count
- 11
- Lifecycle
- ACTIVE
- Datasheet
- TPS7A9401DSCR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.7441(MOQ 25)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-low output noise floor for clean RF supply rails in sensitive receiver and VCO circuits
- Ultra-high PSRR (Power Supply Rejection Ratio) rejects input ripple from DC-DC converter stages at MHz frequencies
- 1 A continuous output current with only 0.15 V typical dropout voltage minimizes power dissipation
- 1.7 V to 5.7 V input range covers single-cell Li-Ion and regulated 5 V bus applications
- Adjustable output voltage via external resistor divider for flexible RF subsystem power design
Applications
TPS7A9401DSCR is optimized for powering noise-sensitive RF components such as VCOs, PLLs, low-noise amplifiers (LNAs), and ADC analog supplies in wireless communication and test equipment designs. Its ultra-high PSRR suppresses switching noise from preceding DC-DC converters up to several MHz, eliminating spurs on the RF output that would otherwise degrade phase noise and receiver sensitivity. The 1 A output capability and 0.15 V dropout make it efficient as a post-regulator behind a switching pre-regulator in 4G/5G radio units, Wi-Fi access points, and software-defined radio (SDR) platforms.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Adjustability | ADJUSTABLE |
| Dropout Voltage1-Max | 0.24V |
| Dropout Voltage1-Nom | 0.15V |
| Input Voltage-Max | 5.7V |
| Input Voltage-Min | 1.7V |
| JESD-30 Code | R-PDSO-N10 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 1A |
| Output Voltage1-Max | 5.5V |
| Output Voltage1-Min | 0.4V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOLCC10,.12,20 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Regulator Type | ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Tolerance-Max | 1% |
| Package | Small Outline No-lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Mainland China, Malaysia, Philippines, Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the dropout voltage of TPS7A9401DSCR and how does it affect efficiency in battery-powered RF designs?
TPS7A9401DSCR has a typical dropout voltage of 0.15 V and a maximum of 0.24 V at 1 A load current. In a 3.6 V Li-Ion powered design where the LDO output is set to 3.3 V, the device remains in regulation down to a battery voltage of 3.45 V typical, extracting most of the usable battery charge and allowing the RF subsystem to operate through most of the discharge curve before dropout occurs.
Why is TPS7A9401DSCR preferred over a standard LDO for powering a PLL in a 5G radio design?
Standard LDOs typically achieve 40 dB to 60 dB of PSRR at 1 MHz, while TPS7A9401DSCR provides significantly higher PSRR at RF frequencies, suppressing DC-DC converter switching noise that would otherwise couple into the PLL VCO supply and raise phase noise by several dBc/Hz. Even a 1 mV supply ripple at the VCO input can translate to tens of femtoseconds of jitter, so the ultra-high PSRR of TPS7A9401DSCR directly improves PLL lock stability and spectral purity in 5G NR frequency synthesis chains.
How is the output voltage of TPS7A9401DSCR set and what voltage range is achievable?
The output voltage of TPS7A9401DSCR is set by an external resistor divider between the output pin, the feedback (FB) pin, and ground, following the formula V_OUT = V_REF x (1 + R1/R2), where V_REF is the internal reference voltage (typically 0.8 V to 1.0 V). The adjustable range spans from approximately 0.8 V to 5.5 V within the 1.7 V to 5.7 V input constraint, covering all common RF supply voltages from 1.0 V digital rails to 3.3 V analog supplies used in LNA and mixer circuits.
What package does TPS7A9401DSCR use and how does its thermal performance compare to similar LDO packages?
TPS7A9401DSCR uses a 10-pin WSON (SON) package measuring approximately 3 mm x 2 mm with an exposed thermal pad on the bottom. At 1 A output with a 0.5 V input-to-output differential, the device dissipates 500 mW; the exposed thermal pad, when soldered to a 2-layer PCB copper pour, achieves a junction-to-board thermal resistance of approximately 20°C/W, keeping junction temperature below 85°C even at 25°C ambient without additional heatsinking.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 25+ | $5.4100 | $135.25 |
| 100+ | $2.4160 | $241.60 |
| 107+ | $1.8859 | $201.79 |
| 138+ | $1.8150 | $250.47 |
| 173+ | $1.7441 | $301.73 |
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