Specification	REG103GA-3.3/2K5

Control Features	Enable
Current - Output	500 mA
Current - Quiescent (Iq)	700 µA
Current - Supply (Max) [Max]	1.3 mA
Mounting Type	Surface Mount
Number of Regulators	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	1.81 mOhm
Package / Case	SOT-223-6
Protection Features	Over Current, Over Temperature
PSRR	65 dB
Supplier Device Package	SOT-223-6
Voltage - Input (Max) [Max]	15 V
Voltage - Output (Min/Fixed)	3.3 V
Voltage Dropout (Max) [Max]	0.28 V

REG103 Series

Part	Mounting Type	Voltage Dropout (Max) [Max]	Control Features	Output Type	Supplier Device Package	PSRR	Voltage - Input (Max) [Max]	Current - Supply (Max) [Max]	Protection Features	Operating Temperature [Max]	Operating Temperature [Min]	Output Configuration	Package / Case	Current - Output	Number of Regulators	Voltage - Output (Min/Fixed)	Current - Quiescent (Iq)	Package / Case [y]	Package / Case [x]
Texas Instruments REG103FA-5/500	Surface Mount	0.28 V	Enable	1.81 mOhm	TO-263 (DDPAK-5)	65 dB	15 V	1.3 mA	Over Current Over Temperature	85 °C	-40 °C	Positive	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	500 mA	1	5 V	700 µA
Texas Instruments REG103GA-3.3/2K5	Surface Mount	0.28 V	Enable	1.81 mOhm	SOT-223-6	65 dB	15 V	1.3 mA	Over Current Over Temperature	85 °C	-40 °C	Positive	SOT-223-6	500 mA	1	3.3 V	700 µA
Texas Instruments REG103FA-5KTTT	Surface Mount	0.28 V	Enable	1.81 mOhm	TO-263 (DDPAK-5)	65 dB	15 V	1.3 mA	Over Current Over Temperature	85 °C	-40 °C	Positive	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	500 mA	1	5 V	700 µA
Texas Instruments REG103FA-2.5	Surface Mount	0.28 V	Enable	1.81 mOhm	TO-263 (DDPAK-5)	65 dB	15 V	1.3 mA	Over Current Over Temperature	85 °C	-40 °C	Positive	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	500 mA	1	2.5 V	700 µA
Texas Instruments REG103GA-5G4	Surface Mount	0.28 V	Enable	1.81 mOhm	SOT-223-6	65 dB	15 V	1.3 mA	Over Current Over Temperature	85 °C	-40 °C	Positive	SOT-223-6	500 mA	1	5 V	700 µA
Texas Instruments REG103UA-3/2K5	Surface Mount	0.28 V	Enable	1.81 mOhm	8-SOIC	65 dB	15 V	1.3 mA	Over Current Over Temperature	85 °C	-40 °C	Positive	8-SOIC	500 mA	1		700 µA	3.9 mm	0.154 in
Texas Instruments REG103FA-2.7	Surface Mount	0.28 V	Enable	1.81 mOhm	TO-263 (DDPAK-5)	65 dB	15 V	1.3 mA	Over Current Over Temperature	85 °C	-40 °C	Positive	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	500 mA	1	2.7 V	700 µA
Texas Instruments REG103UA-3.3/2K5	Surface Mount	0.28 V	Enable	1.81 mOhm	8-SOIC	65 dB	15 V	1.3 mA	Over Current Over Temperature	85 °C	-40 °C	Positive	8-SOIC	500 mA	1	3.3 V	700 µA	3.9 mm	0.154 in
Texas Instruments REG103FA-2.5/500	Surface Mount	0.28 V	Enable	1.81 mOhm	TO-263 (DDPAK-5)	65 dB	15 V	1.3 mA	Over Current Over Temperature	85 °C	-40 °C	Positive	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	500 mA	1	2.5 V	700 µA
Texas Instruments REG103FA-2.7/500	Surface Mount	0.28 V	Enable	1.81 mOhm	TO-263 (DDPAK-5)	65 dB	15 V	1.3 mA	Over Current Over Temperature	85 °C	-40 °C	Positive	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	500 mA	1	2.7 V	700 µA

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Texas Instruments	LARGE T&R	1	$ 4.55
		100	$ 3.71
		250	$ 2.91
		1000	$ 2.47

Description

General part information

REG103 Series

The REG103 is a family of low-noise, low-dropout, linear regulators with low ground pin current. Its new DMOS topology provides significant improvement over previous designs, including low-dropout voltage (only 115mV typ at full load), and better transient performance. In addition, no output capacitor is required for stability, unlike conventional low-dropout regulators that are difficult to compensate and require expensive low ESR capacitors greater than 1µF.

Typical ground pin current is only 1mA (at IOUT= 500mA) and drops to 0.5µA innot enabledmode. Unlike regulators with PNP pass devices, quiescent current remains relatively constant over load variations and under dropout conditions. The REG103 has very low output noise (typically 33µVrms for VOUT= 3.3V with CNR= 0.01µF), making it ideal for use in portable communications equipment. On-chip trimming results in high output voltage accuracy. Accuracy is maintained over temperature, line, and load variations. Key parameters are tested over the specified temperature range (–40°C to +85°C).

The SO-8 version of the REG103 has an ERROR\ pin that provides apower goodflag, indicating the regulator is in regulation. The REG103 is well protected—internal circuitry provides a current limit that protects the load from damage. Thermal protection circuitry keeps the chip from being damaged by excessive temperature. In addition to the SO-8 package, the REG103 is also available in the DDPAK and the SOT223-5.

Documents

Technical documentation and resources

REG103GA-3.3/2K5

Deep-Dive with AI

REG103GA-3.3/2K5

Deep-Dive with AI

Technical Specifications

REG103 Series

Pricing

Description

REG103 Series

Documents

DEM-TO263LDO Demonstration Fixture

LDO PSRR Measurement Simplified (Rev. A)

DMOS Delivers Dramatic Performance Gains to LDO Regulators (EDN mag)

DEM-SOT223LDO Demonstration Fixture

Packaging Limits Range of Linear Regulators

DMOS 500mA Low-Dropout Regulator datasheet (Rev. D)

LDO Noise Demystified (Rev. B)

REG103 Series