TPS79901DDCT (ADJUSTIBLE VOLTAGE VERSION) Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
TPS79901DDCT is an adjustable-voltage low-dropout linear regulator delivering up to 200 mA output current with high PSRR. It supports a wide input voltage range and adjustable output suitable for noise-sensitive RF and analog circuits. Packaged in a compact SOT-23-5 for space-constrained portable and IoT power supply designs.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TPS79901DDCT (ADJUSTIBLE VOLTAGE VERSION)?
- Adjustable output voltage with resistor-divider feedback for flexible low-noise LDO regulation up to 200 mA output current
- High PSRR performance across a wide frequency range reduces supply noise for RF front-ends and precision analog circuits
- SOT-23-5 package with only 2 external capacitors minimizes BOM and PCB footprint in portable power supply designs
What is TPS79901DDCT (ADJUSTIBLE VOLTAGE VERSION) used for?
The TPS79901DDCT is used in RF transceivers, precision analog signal chains, and low-power sensor modules requiring a clean, adjustable LDO supply with minimal external components. Its high power-supply rejection ratio makes it ideal for noise-sensitive applications such as GPS receivers, Bluetooth front-ends, and audio codecs operating from 3.3 V or 5 V input rails. The SOT-23-5 package simplifies integration into space-constrained battery-powered IoT devices and wearable electronics.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TPS79901DDCT (ADJUSTIBLE VOLTAGE VERSION) datasheet?
TPS79901DDCT (ADJUSTIBLE VOLTAGE VERSION) Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TPS79901DDCT (ADJUSTIBLE VOLTAGE VERSION)?
Compatible alternatives and drop-in replacements for TPS79901DDCT (ADJUSTIBLE VOLTAGE VERSION):
Adjustable Positive LDO Regulator, 1.2V Min, 6.5V Max, 0.175V Dropout, BICMOS, PDSO5
Adjustable Positive LDO Regulator, 1.2V Min, 6.5V Max, 0.175V Dropout, BICMOS, PDSO5
Frequently Asked Questions
What is the maximum output current of TPS79901DDCT and is 200 mA sufficient for typical RF module power supply requirements?
The TPS79901DDCT supplies up to 200 mA, which covers the peak current demand of most low-power RF modules such as Bluetooth LE and Zigbee transceivers that typically require 50 mA to 150 mA during transmit bursts. For designs requiring more than 200 mA, a higher-current companion like TPS799xx in a larger SOT-23 variant or a WSON package would be needed to maintain adequate headroom.
How do you set the output voltage of TPS79901DDCT and what resistor values are needed for a 1.8 V regulated output?
The TPS79901DDCT output voltage is set with a resistor divider from output to feedback pin to ground. Using a standard feedback reference of approximately 0.8 V to 1.0 V, a top resistor of 100 kΩ and a bottom resistor of approximately 82 kΩ to 100 kΩ produces a 1.8 V output, depending on the exact reference voltage. This 2-resistor configuration requires no external compensation capacitor beyond the recommended 1 µF output capacitor.
Why is high PSRR important for TPS79901DDCT in RF and audio applications, and what PSRR level should designers target?
High PSRR ensures that switching noise on the input supply—typically 50 mV to 200 mV ripple from a nearby DC-DC converter—is attenuated before reaching sensitive RF or audio circuits. A PSRR of 60 dB at 1 kHz, which LDOs like TPS79901DDCT are designed to achieve, reduces a 100 mV supply ripple to only 100 µV on the regulated output, preventing receiver desensitization and audio THD degradation in mixed-signal system designs.
How does the SOT-23-5 package of TPS79901DDCT compare to larger SOT-223 LDOs for portable device designs?
The SOT-23-5 package of TPS79901DDCT measures approximately 1.6 mm × 1.6 mm body, over 10× smaller than the SOT-223 package at 3.5 mm × 6.5 mm. While SOT-223 LDOs can handle 500 mA to 1 A due to better thermal dissipation, for applications requiring only 200 mA the SOT-23-5 saves significant board area in wearables and IoT sensor nodes where PCB footprint is measured in single-digit square millimeters.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
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.
More from Texas Instruments
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit