Mfr Part #:

LDK320M33R

Mfr Name: ST

The STMicroelectronics LDK320M33R is a linear voltage regulator providing a fixed 3.3V output. It offers a 200mA output current and is housed in a compact SOT-23-5 package.

✓ Total Stock: 156,878 pcs

$ Price Range: $0.28

LDK320M33R Available from 4 distributors

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Romaks Technologies ✓ Non-Authorised Inventory information	150,667 pcs On Request	150667 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Risen Electronics ✓ Non-Authorised Inventory information	4,000 pcs On Request	4000 pcs	On Request	1	On Request	On Request	On Request	On Request	2026-02-16 21:33:16
Optech Co.,Limited ✓ Non-Authorised Inventory information	1,266 pcs On Request	1266 pcs	On Request	1	On Request	On Request	21+	On Request	On Request
Rayichip ✓ Non-Authorised Inventory information	945 pcs On Request	945 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

LDK320M33R Description

Short technical summary and product information.

The STMicroelectronics LDK320M33R is a linear, low dropout (LDO) voltage regulator designed for various power management applications. It delivers a stable 3.3V output voltage with a maximum output current of 200mA. The device features a low dropout voltage of 0.35V at 200mA, making it efficient for battery-powered devices.

Key electrical characteristics include a maximum input voltage of 18V and a quiescent current of 90µA, with a maximum supply current of 100µA. Protection features such as over-current and over-temperature shutdown are integrated to enhance reliability. The regulator operates within a junction temperature range of -40°C to 125°C.

This component is supplied in a surface-mount SOT-23-5 package, also referred to as SC-74A, SOT-753. It is available in tape and reel packaging, suitable for automated assembly processes. The LDK320M33R is designed for applications requiring a reliable and efficient voltage regulation solution.

LDK320M33R Quick Information

Product Type: Linear Voltage Regulator

Series: LDK320

Canonical Name: ST LDK320M33R Linear Voltage Regulator

Subcategory: Linear, Low Drop Out (LDO) Regulators

LDK320M33R Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

LDK320M33R Estimated Pricing

Qty	Low	High
1+	$0.28	$0.28

Estimated market price range - modelled values for guidance only, not live distributor offers.

LDK320M33R Features

Fixed 3.3V output voltage.
200mA maximum output current.
Low 0.35V dropout voltage.
Over-current and over-temperature protection.
Surface mount SOT-23-5 package.

LDK320M33R Applications

Powering sensitive electronic circuits.
Battery-operated portable devices.
Low power voltage regulation needs.
Point-of-load power supplies.

LDK320M33R FAQs

5 frequently asked questions generated from this part’s specifications.

What is the output voltage of the LDK320M33R?

The LDK320M33R provides a fixed output voltage of 3.3V.

What is the maximum output current for the LDK320M33R?

The LDK320M33R can supply a maximum output current of 200mA.

What is the dropout voltage of the LDK320M33R at 200mA?

The dropout voltage for the LDK320M33R is 0.35V at a load of 200mA.

What is the operating temperature range for the LDK320M33R?

The LDK320M33R operates within a junction temperature range of -40°C to 125°C.

What package type is the LDK320M33R supplied in?

The LDK320M33R is supplied in a SOT-23-5 surface mount package.

Category	New Products
Manufacturer Name	ST
Control Features	Enable
Lead Style	Gull Wing
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 125°C
Output Current	200mA
Output Voltage	3.3V
PSRR	88dB ~ 48dB (120Hz ~ 10kHz)
Protection Features	Over Current, Over Temperature
Supplier Device Package	SOT-23-5
Tape & Reel	Yes