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TI / Power Management

UA78L05ACDR

The UA78L series are low-cost 3-terminal fixed linear regulators delivering up to 100mA from a 4.75V to 30V input with internal current-limiting and thermal-shutdown protection. The 5V version (UA78L05) offers a 3.75% output accuracy and operates from -40C to 125C, suitable for low-current local regulation.

New & Original Prototype to volume sourcing
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COMPONENT PROFILE
TI UA78L05ACDR
Image for reference
Package
SOIC-8
01 / PRODUCT INFORMATION

Product overview

The UA78L series are low-cost 3-terminal fixed linear regulators delivering up to 100mA from a 4.75V to 30V input with internal current-limiting and thermal-shutdown protection. The 5V version (UA78L05) offers a 3.75% output accuracy and operates from -40C to 125C, suitable for low-current local regulation.

Manufacturer
TI
Part number
UA78L05ACDR
Category
Power Management
Package
SOIC-8
Packaging
Tape & Reel
Condition
New & Original
Compliance
RoHS & REACH Compliant
Lifecycle
Confirm with manufacturer
Lead time / MOQ
Confirm with quotation
02 / TECHNICAL DETAILS

Technical parameters

35 parameters

Construction

UA78L02AC, UA78L05C, UA78L09C, and UA78L10AC
30
UA78L12C, UA78L12AC, UA78L15C, and UA78L15AC
35
UA78L02AC (for legacy chip only)
20
UA78L033AC (for new chip only)
20
IO = 1 mA to 70 mA, and TJ = 0°C to 125°C
2.75
VI = 4.75 V to 20 V, and TJ = 25°C
20
VI = 5 V to 20 V, and TJ = 25°C
16
Ripple rejection VI = 6 V to 20 V, f = 120 Hz, and TJ = 25°C
51 dB
IO = 1 mA to 100 mA, and TJ = 25°C
12
IO = 1 mA to 40 mA, and TJ = 25°C
6
VI = 5 V to 20 V, and TJ = 0°C to 125°C
2.5
IO = 1 mA to 40 mA, and TJ = 0°C to 125°C
0.1
VI = 6 V to 20 V, and TJ = -40°C to 125°C
0.675
IO = 1 mA to 40 mA, and TJ = -40°C to 125°C
0.01
VI = 7 V to 20 V, and
5
chip) UA78L05C
5.5
VI = 8 V to 20 V, and TJ = full range (for new legacy chip)
1.5 mA
IO = 1 mA to 40 mA, and UA78L05C
1.5 mA
VI = 8 V to 20 V, and TJ = full range (for new chip)
0.485
IO = 1 mA to 100 mA
22
IO = 1 mA to 40 mA
13
to 100 kHz for new chip
290 µV
VI = 16 V to 27 V (legacy chip)
1.5
VI = 16 V to 27 V (new chip)
0
VI = 8.5 V to 20 V, UA78L06AC
6.2
IO = 1 mA to 40 mA UA78L06C
6.8
regulation IO = 1 mA to 40 mA
9

Performance

Input voltage, VI (for new chip)
45
Junction temperature
150 °C
Storage temperature, Tstg
150 °C
Output voltage TJ = 0°C to 125°C
2.75 V
Output noise voltage f = 10 Hz to 100 kHz, and TJ = 25°C
30 µV
Dropout voltage TJ = 25°C
1.7 V
Output voltage IO = 1 mA to 100 mA
16
Output noise voltage TJ = 25°C, and f = 10 Hz to 100 kHz
46 µV
Browse by category · All supplied specifications included
03 / RESOURCES

Specifications & documentation

Use the official manufacturer documentation to verify electrical characteristics, package dimensions and operating limits before design approval.

Official product pageProduct information from the manufacturer Official datasheetTechnical specifications and reference material
04 / COMMON QUESTIONS

Frequently asked questions

Common pre-quotation questions and selection notes to help you verify key parameters and sourcing before requesting a quote.

How do I verify the part is genuine / avoid counterfeit?

Buy only from authorized or franchised channels. On receipt, check: (1) laser-etched markings that solvent will not remove; (2) batch / lot code consistent between label and device; (3) original reel or tube packaging; (4) request traceability documents (CoC, date code). For critical parts, third-party X-ray / decapsulation testing is recommended.

How do I read the markings / date code on a chip?

Most active ICs use a 4-digit date code YYWW (year + week, e.g. 2345 = 2023 week 45). The top mark is manufacturer logo + base part number + lot code. For SMD code lookup, search by "marking code + package" on AllDataSheet / Octopart / LCSC.

What does the package code mean (TO-220, SOT-23, QFP…)?

Package codes describe the physical form factor and pin layout — critical when sourcing, because electrically equivalent parts in different packages will not fit the PCB. Common: TO-220 (3-terminal power), SOT-23 (3-pin small signal), DIP / SOIC (through-hole / SMD ICs), QFP / QFN (MCUs, processors).

What if my original model is discontinued (EOL / NRND)?

Three options: (1) the manufacturer’s recommended replacement; (2) franchised distributor legacy stock; (3) a functionally compatible cross-brand part — provided pinout and key parameters match. Always evaluate on a real board before mass swap.

What is the minimum order quantity (MOQ) and lead time?

We support both sample and volume orders. Minimum order quantity, stock availability and lead time are confirmed per inquiry — tell us your model and quantity and we will quote. Sample quantities for design validation are supported.

Can I get the datasheet and samples?

The full datasheet is linked on this page. For parts without a direct datasheet, we can locate the manufacturer document on request. Sample requests are supported — contact us with your model and quantity.

Request confirmation of current stock, date code, packaging, price and delivery terms. Product information does not constitute a binding offer; final specifications are confirmed with your quotation.

05 / ALTERNATIVE MODELS

Alternative models

Same category and package — pin- and footprint-compatible options for drop-in replacement or second sourcing.

Why keep a second source: a single part number is exposed to capacity, EOL or price swings — a pin-compatible alternative keeps your design uninterrupted. The models below are filtered by same category + same package; verify key electrical parameters (voltage rating, R_DS(on), Q_g …) before swapping, and validate on a real board when needed.

LM2936MX-5.0/NOPB
TI · SOIC-8
The LM2936 is a 50-mA LDO regulator accepting up to 60 V input with a typical quiescent current of only 15 uA and about 200 mV typical dropout at full load. It includes reverse-voltage protection and is offered in fixed 3-V, 3.3-V and 5-V outputs, operating from -40°C to +125°C. It suits automotive and industrial supplies that need very low standby current.
Power Management In stock New & Original
TPS2815DR
TI · SOIC-8
The TPS2815 is a dual-channel, non-inverting high-speed MOSFET driver that delivers 2A source/sink current per channel with 14ns rise and 15ns fall times. It operates from a 4V to 14V supply, uses CMOS input thresholds with two-input NAND logic per channel, and has a 25ns typical propagation delay. It drives low-side MOSFETs in switching power supplies and motor controls. (Note: NRND - not recommended for new designs.)
Power Management In stock New & Original
UCC28C41QDRQ1
TI · SOIC-8
The UCC28C41 is a BiCMOS current-mode PWM controller, pin-compatible with the UC284x family, featuring 7-V startup, 50-uA start-up current and up to 1-MHz operation with a ±1% reference. The -Q1 automotive grade operates from -40°C to +125°C and is housed in an 8-pin SOIC, used for isolated and single-ended DC-DC converters in automotive and industrial power supplies.
Power Management In stock New & Original
UCC5350MCDR
TI · SOIC-8
The UCC5350 is a single-channel isolated gate driver for MOSFETs, IGBTs, SiC, and GaN, with 10-A source/sink drive and 3-kV or 5-kV isolation rating. It offers 9.5-V to 33-V output supply, 8-V/12-V UVLO, active miller clamp, and 65-ns propagation delay. It is used in isolated power converters and motor drives.
Power Management In stock New & Original
06 / RELATED COMPONENTS

Related components

Other parts in the same category — compare specifications and request a combined quote.

ATL431LIBQDBZR
TI · SOT-23-3
The ATL431LI is a low quiescent-current, adjustable precision shunt regulator offering improved stability and lower reference input current versus the standard ATL431. It supports an output voltage range of 2.5 V to 36 V and operates from -40 C to 125 C. Typical applications include voltage references, monitoring, and series regulation in space-constrained designs.
Power Management In stock New & Original
ATL432LIBQDBZR
TI · SOT-23-3
The ATL432 is a three-terminal adjustable shunt regulator with specified thermal stability across automotive, commercial, and industrial temperature ranges and a low minimum cathode current of 20uA. It operates from 2.5V to 36V with initial accuracy of 0.5% or 1% and a temperature coefficient of 92 ppm/degC. Typical uses include voltage monitoring, overvoltage protection, and optocoupler feedback in power supplies.
Power Management In stock New & Original
CSD18501Q5A
TI · VSONP-8
The CSD18501Q5A is a 40 V N-channel NexFET power MOSFET in a 5 mm x 6 mm SON package with a maximum Rds(on) of 3.2 mOhm at 10 V gate drive (4.3 mOhm at 4.5 V). It features logic-level drive, a typical gate threshold of 1.8 V and supports up to 161 A silicon-limited / 100 A package-limited drain current. With a -55 degC to 150 degC range it is suited to synchronous buck and power-switching applications.
Power Management In stock New & Original
LM1117T-3.3/NOPB
TI · TO-220-3
The LM1117 is an 800-mA low-dropout linear regulator with a 2.6-V to 15-V input range and fixed 3.3-V output. It provides 1.2-V typical dropout, 47-dB PSRR at 100 kHz, and thermal protection. Typical uses include post-regulation, battery chargers, and portable equipment.
Power Management In stock New & Original
LM2596SX-5.0/NOPB
TI · DDPAK
The LM2596 is a 150kHz monolithic step-down switching regulator capable of driving a 3A load with excellent line and load regulation. It accepts 4.5V to 40V input and integrates a fixed-frequency oscillator, internal compensation, and features such as enable and overcurrent protection. It is used for efficient step-down DC/DC conversion in industrial and consumer power supplies.
Power Management In stock New & Original
LM26400YMHX
TI · HTSSOP-16
The LM26400Y is a dual-channel, current-mode synchronous buck regulator delivering 2 A per channel from a 3 V to 20 V input, with output adjustable down to 0.6 V. It switches at 500 kHz and offers light-load efficiency, power-good and pre-bias start-up with a typical quiescent current of 4 mA. Operating from -40 degC to 125 degC, it is used in point-of-load and distributed-power systems.
Power Management In stock New & Original
LM2936MX-5.0/NOPB
TI · SOIC-8
The LM2936 is a 50-mA LDO regulator accepting up to 60 V input with a typical quiescent current of only 15 uA and about 200 mV typical dropout at full load. It includes reverse-voltage protection and is offered in fixed 3-V, 3.3-V and 5-V outputs, operating from -40°C to +125°C. It suits automotive and industrial supplies that need very low standby current.
Power Management In stock New & Original
LM3102MHX/NOPB
TI · HTSSOP-20
The LM3102 is a 2.5 A synchronous step-down switching regulator running at a fixed 1 MHz with constant on-time (COT) emulated-ripple control for fast transient response. It accepts 4.5 V to 42 V input and provides an adjustable 0.8 V to 7 V output with overcurrent protection and tracking, operating from -40 C to 125 C. It suits industrial and automotive point-of-load power supplies.
Power Management In stock New & Original