REG113NA-3.3/250 Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock

Name: REG113NA-3.3/250
Brand: Texas Instruments
SKU: REG113NA-3.3/250
Availability: InStock

REG113NA-3.3/250 is a fixed 3.3V LDO linear regulator from Texas Instruments delivering 400mA output with 250mV typical dropout voltage and 3.7V to 10V input range. Available in a compact SOT-23-5 package, it is well-suited for portable battery-powered devices and mixed-signal board 3.3V rail regulation.

ACTIVEIntegrated CircuitVerified Jun 2026

Package / Visual Reference

REG113NA-3.3/250SOT23 (5-Pin)

Quick Facts

Manufacturer: Texas Instruments
Package: SOT23 (5-Pin)
Pin Count: 5
Lifecycle: ACTIVE
Datasheet: REG113NA-3.3/250 Datasheet PDF
Category: Integrated Circuit
Price: From $1.9600(MOQ 50)
Temp Range: -40.0°C to 85.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of REG113NA-3.3/250?

Fixed 3.3V output at 400mA with only 250mV typical dropout voltage, enabling efficient regulation from 4AA batteries or single-cell Li-ion packs down to 3.3V
Wide 3.7V to 10V input range accommodates diverse power sources including 5V USB adapters, 6V NiMH packs, and 9V alkaline batteries in portable designs
Tiny SOT-23-5 package minimizes PCB footprint for 3.3V supply circuits in space-constrained consumer electronics, IoT nodes, and wearable devices

What is REG113NA-3.3/250 used for?

REG113NA-3.3/250 provides a stable 3.3V regulated supply for microcontrollers, wireless modules, and sensors in portable battery-operated devices such as IoT sensors, GPS trackers, and handheld instruments. Its 400mA current capacity and 250mV dropout voltage support continuous operation from a single-cell lithium-ion battery discharging from 4.2V down to approximately 3.5V. The SOT-23-5 footprint makes it ideal for multi-layer PCBs in compact smart home devices and wearables where linear regulation is preferred over switching for noise-sensitive analog and RF circuits.

What are the specifications of REG113NA-3.3/250?

Pbfree Code	Yes
Reach Compliance Code	Compliant
YTEOL	15
Adjustability	FIXED
Dropout Voltage1-Max	0.41V
Dropout Voltage1-Nom	0.25V
Input Voltage Absolute-Max	12V
Input Voltage-Max	10V
Input Voltage-Min	3.7V
JESD-30 Code	R-PDSO-G5
JESD-609 Code	e4
Line Regulation-Max	0.099%
Load Regulation-Max	0.099%
Number of Functions	1
Number of Outputs	1
Operating Temperature TJ-Max	85°C
Operating Temperature TJ-Min	-40 °C
Output Current1-Max	0.4A
Output Voltage1-Max	3.399V
Output Voltage1-Min	3.201V
Output Voltage1-Nom	3.3V
Package Body Material	PLASTIC/EPOXY
Package Equivalence Code	TSOP5/6,.11,37
Package Shape	RECTANGULAR
Package Style	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
Packing Method	TR
Peak Reflow Temperature (Cel)	260
Qualification Status	Not Qualified
Regulator Type	FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
Surface Mount	YES
Technology	NMOS
Terminal Finish	Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal Form	GULL WING
Terminal Pitch	0.95mm
Terminal Position	DUAL
Time@Peak Reflow Temperature-Max (s)	30
Voltage Tolerance-Max	2.3%
## REG113NA-3.3/250 Alternates Showing results	Image
Package	SOT23 (5-Pin)

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)
Moisture Sensitivity Level	MSL 1
ECCN	EAR99
HTS Code	8542.39.00.90

Where can I find the REG113NA-3.3/250 datasheet?

REG113NA-3.3/250 Datasheet Download

Official datasheet from Texas Instruments

What are equivalent replacements for REG113NA-3.3/250?

Compatible alternatives and drop-in replacements for REG113NA-3.3/250:

YR1B12K7CC

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Frequently Asked Questions

What is the dropout voltage of REG113NA-3.3/250 and how does it affect battery life in portable designs?

REG113NA-3.3/250 has a typical dropout voltage of 250mV and a maximum of 410mV at 400mA output. With a lithium-ion battery discharging from 4.2V to its cutoff, the regulator maintains a stable 3.3V output until the battery voltage drops to approximately 3.55V, extending usable battery life compared to regulators with 500mV or higher dropout that lose regulation 250mV earlier in the discharge curve.

What input voltage range does REG113NA-3.3/250 support and which power sources are compatible?

REG113NA-3.3/250 operates from a minimum input of 3.7V to a maximum of 10V, with an absolute maximum of 12V. This range supports 4AA alkaline batteries at 6V, single-cell lithium-ion packs at 3.7V to 4.2V, standard 5V USB power, and 9V wall adapters, making it versatile for multiple portable device power architectures without requiring input protection components at typical operating voltages.

How does REG113NA-3.3/250's SOT-23-5 package compare to larger SOT-223 packages for heat dissipation at 400mA?

The SOT-23-5 package has a junction-to-ambient thermal resistance around 250°C/W, which limits maximum power dissipation to roughly 300mW to 500mW in free-air at 25°C ambient. At 400mA with a 5V input and 3.3V output, the device dissipates 680mW ((5V - 3.3V) x 0.4A), which may exceed the SOT-23-5 thermal budget and require PCB copper area for heat spreading. Designers should verify junction temperature stays below 125°C maximum at their worst-case input voltage and load conditions.

For a 3.3V microcontroller node powered from a 9V alkaline battery, is REG113NA-3.3/250 the right choice?

REG113NA-3.3/250 can regulate 9V input down to 3.3V at up to 400mA, well within its 10V maximum input rating. However, the power dissipation at 9V input and 100mA load would be (9V - 3.3V) x 0.1A = 570mW, approaching the SOT-23-5 thermal limit. For low-current MCU nodes drawing under 50mA average, the device operates comfortably and the 9V battery provides good regulation headroom. For higher-current loads from a 9V source, a switching pre-regulator or a higher-current LDO in a larger package may be more appropriate.

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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.

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AvailabilityIn Stock

Reference Price (USD)

From $1.9600

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Qty.	Unit Price	Ext. Price
50+	$2.9600	$148.00
100+	$2.7600	$276.00
250+	$2.5900	$647.50
500+	$2.2100	$1105.00
1000+	$2.0800	$2080.00
10000+	$1.9600	$19600.00

pcs

Unit price: $2.9600 · Total: $148.00

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Lead Time3-7 business days

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OriginChina (Authorized)

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REG113NA-3.3/250 Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock

What are the key features of REG113NA-3.3/250?

What is REG113NA-3.3/250 used for?

What are the specifications of REG113NA-3.3/250?

Compliance & Regulatory

Where can I find the REG113NA-3.3/250 datasheet?

What are equivalent replacements for REG113NA-3.3/250?

Frequently Asked Questions

What is the dropout voltage of REG113NA-3.3/250 and how does it affect battery life in portable designs?

What input voltage range does REG113NA-3.3/250 support and which power sources are compatible?

How does REG113NA-3.3/250's SOT-23-5 package compare to larger SOT-223 packages for heat dissipation at 400mA?

For a 3.3V microcontroller node powered from a 9V alkaline battery, is REG113NA-3.3/250 the right choice?

Related Guides

CSD87313DMS Synchronous Buck Power Stage Design Guide

STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection

C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC

STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security

Why Buy from FindMyChip

About Texas Instruments

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