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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

STMicroelectronics LDLN025M30R

Name: LDLN025M30R
Brand: STMicroelectronics
SKU: LDLN025M30R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LDLN025M30R

Manufacturer:: STMicroelectronics

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: SC-74A, SOT-753

Datasheet:: LDLN025M30R.pdf

Description:: IC REG LINEAR 3V 250MA SOT23-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

LDLN025M30R from STMicroelectronics is a 3.0 V, 250 mA ultra-low-noise low-dropout linear regulator in SOT23-5L package, designed for noise-sensitive analog and RF loads. It delivers 6.5 μVRMS output noise, 80 dB PSRR at 100 Hz, and 250 mV dropout at full load, operating across 1.5–5.5 V input with 12 μA quiescent current-enabling long battery life in portable image sensors and VCO power rails.

For engineers reviewing the LDLN025M30R datasheet, LDLN025M30R pinout, LDLN025M30R application, or LDLN025M30R equivalent, this page provides verified electrical specs, package mapping to SOT23-5L, validated thermal and transient performance, and real-world use cases in smartphone camera modules and RF front-end biasing.

Technical Context

The LDLN025M30R implements a bandgap-referenced error amplifier with internal soft-start, logic-controlled enable (active-high), and output discharge circuitry. Its architecture maintains ultra-low quiescent current (12 μA no-load) even during dropout, via controlled I_Q regulation-not just shutdown mode.

It integrates overcurrent and thermal shutdown protection (trip at 160 °C with 20 °C hysteresis), operates stably with 1 μF ceramic input/output capacitors, and supports output voltage accuracy of ±2% across –40 °C to +125 °C for 3.0 V versions in SOT23-5L.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	3.0 V ±2% over line, load, and temperature - ensures stable bias for precision ADCs and VCOs without external trimming.
Max Output Current	250 mA - sufficient to power dual-lane MIPI CSI-2 image sensor interfaces or RF power amplifier bias stages.
Dropout Voltage	250 mV at 250 mA (SOT23-5L) - enables operation down to 3.25 V input while maintaining regulated 3.0 V output in Li-ion single-cell systems.
Output Noise	6.5 μVRMS (10 Hz–100 kHz, 250 mA load) - meets stringent noise floor requirements for high-resolution image sensor analog signal chains.
PSRR	80 dB @ 100 Hz, 60 dB @ 100 kHz - suppresses switching noise from PMIC DC-DC converters feeding adjacent digital blocks.
Quiescent Current	12 μA at no-load, ≤425 μA at 250 mA - extends standby time in always-on camera subsystems without compromising dynamic response.
Enable Threshold	V_IH = 1.2 V, V_IL = 0.4 V - compatible with 1.8 V and 3.3 V GPIOs for precise sequencing control in multi-rail mobile SoC designs.

Pinout & Package

SOT23-5L package: 5-pin surface-mount, 2.95 mm × 1.60 mm × 1.45 mm body, exposed pad for thermal enhancement (must be connected to GND).

Pin/Terminal	Circuit Role	Design Meaning
VIN	LDO input supply	Accepts 1.5–5.5 V; requires ≥0.7 μF ceramic input capacitor close to pin for stability and transient response.
GND	Power ground reference	Common return path for VIN, VOUT, and EN; must connect to PCB ground plane and exposed pad.
VOUT	Regulated output	Delivers 3.0 V ±2%; stable with 0.7–10 μF ceramic output capacitor (ESR 5–500 mΩ).
EN	Logic-enable input	Active-high control: >1.2 V turns on regulator; <0.4 V forces shutdown (<1 μA total current).
NC	No-connect terminal	Pin 4 in SOT23-5L is not internally connected; may be tied to GND for mechanical reinforcement or left floating.

Key Features

Feature	Design Value
Ultra-low output noise	6.5 μVRMS enables clean power for 12-bit+ image sensor analog front-ends without post-regulation filtering.
Controlled quiescent current in dropout	Maintains ≤425 μA I_Q even when VIN drops to VOUT + 250 mV - critical for brown-out resilience in battery-powered devices.
Output discharge function	230 Ω internal pull-down activates on EN low - discharges VOUT within microseconds to prevent hold-up or latch-up in sequenced power systems.
Thermal and short-circuit protection	Auto-recovery shutdown at 160 °C (20 °C hysteresis) and current limiting to 250–500 mA - ensures robustness in compact, thermally constrained layouts.
Stability with ceramic capacitors	Validated for 0.7–10 μF X7R ceramics (ESR 5–500 mΩ) - eliminates need for costly tantalum or electrolytic capacitors in space-constrained mobile PCBs.

Applications

Smartphone Camera Module

VCO Power Supply

Use Scenario: Powering CMOS image sensor analog core and PLL reference voltage in flagship smartphones.

IC Role / Device Role / Timing Role: Primary LDO delivering ultra-clean 3.0 V bias to sensor's analog pixel array and column ADC.

Use Value: 6.5 μVRMS noise and 80 dB PSRR prevent fixed-pattern noise and spurious tones in captured images under RF interference.

Use Scenario: Providing low-noise supply to voltage-controlled oscillator in 5G mmWave transceiver front-end.

IC Role / Device Role / Timing Role: Dedicated LDO isolating VCO tuning voltage from noisy digital supply domains.

Use Value: Sub-10 μVRMS noise floor minimizes phase jitter, directly improving EVM and spectral purity in RF transmission.

Portable Medical Instrumentation

Wireless LAN Baseband IC

Use Scenario: Biasing precision instrumentation amplifier in handheld ECG or pulse oximeter.

IC Role / Device Role / Timing Role: Low-drift, low-noise 3.0 V source for signal-chain analog components requiring <0.1% gain error.

Use Value: ±2% output accuracy over –40 °C to +125 °C ensures consistent calibration across clinical operating environments.

Use Scenario: Powering Wi-Fi 6/6E baseband processor's analog PHY section in compact IoT gateways.

IC Role / Device Role / Timing Role: Secondary LDO decoupling RF receiver chain from shared system rail.

Use Value: 250 mV dropout allows operation from partially discharged 3.6 V Li-ion cells while sustaining 3.0 V output for sensitive demodulator circuits.

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise LDO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPL7407LDR	7-channel 200 mA sink driver (not LDO); no regulated output, no low-noise design.	Designed for LED/gate driving-not power regulation-so unsuitable for analog/RF biasing.	Select only if driving discrete loads; not a functional substitute for LDLN025M30R.
TPS7A2030PDQNR	300 mA, 3.0 V LDO with 7 μVRMS noise, 68 dB PSRR @ 100 kHz, SOT23-5 package.	Higher PSRR at high frequency but lower 100 Hz PSRR (68 dB vs. 80 dB); slightly larger dropout (300 mV @ 300 mA).	Prefer for high-frequency noise rejection; choose LDLN025M30R when 100 Hz ripple suppression (e.g., from buck converter switching) is dominant concern.

Compared with TPS7A2030PDQNR, LDLN025M30R offers superior 100 Hz PSRR for suppressing low-frequency switching artifacts, while TPL7407LDR is not an LDO and cannot replace it in regulation roles-making LDLN025M30R uniquely suited for ultra-low-noise, low-dropout analog biasing where both metrics are critical.

Availability

LDLN025M30R is available at Aetrix Electronics and suitable for smartphone camera modules, VCO power supplies, portable medical instrumentation, and wireless LAN baseband ICs requiring stable component supply with guaranteed long-term lifecycle support.

Supply support for LDLN025M30R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and consumer ICs with strong analog and power management portfolios.

The LDLN025 series belongs to ST's ultra-low-noise LDO product line, engineered specifically for powering noise-sensitive analog circuits-including image sensors, RF synthesizers, and precision data converters-in battery-operated portable equipment.

FAQ

What is the maximum allowable input voltage for LDLN025M30R?

The absolute maximum input voltage is 7 V, but the recommended operating range is 1.5 V to 5.5 V. Exceeding 5.5 V risks violating safe operating area limits and may trigger internal protection circuits. Operation above 5.5 V is not characterized and voids parametric guarantees per DS11756 Rev 8.

Does LDLN025M30R require an external pull-up on the EN pin?

No. The EN pin has an internal 1 MΩ pull-down resistor, so it defaults to OFF when left unconnected. A logic-high signal ≥1.2 V (e.g., from a microcontroller GPIO) is required to enable regulation; no external pull-up is needed unless active-low control or noise immunity in high-EMI environments is required.

Can LDLN025M30R be used with 0.47 μF output capacitance?

No. The minimum recommended C_OUT is 0.7 μF (per Table 5). Using 0.47 μF violates stability criteria and may cause oscillation or excessive load transient overshoot, as confirmed by Figure 19's stability region boundary. Always use ≥0.7 μF X7R ceramic with ESR between 5 mΩ and 500 mΩ.

Is the exposed pad on the SOT23-5L package electrically connected?

Yes-the exposed pad is internally connected to GND and must be soldered to a PCB ground plane for thermal performance and electrical integrity. Omitting this connection degrades thermal resistance by >30%, increases junction temperature, and risks premature thermal shutdown under 250 mA load per Table 3 (R_thJA = 200 °C/W with proper pad connection).

LDLN025M30R Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 5.5V

Voltage - Output (Min/Fixed):: 3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.2V @ 250mA

Current - Output:: 250mA

Current - Quiescent (Iq):: 25 µA

Current - Supply (Max):: 425 µA

PSRR:: 80dB ~ 60dB (100Hz ~ 100KHz)

Control Features:: Enable

Protection Features:: Over Current, Over Temperature, Short Circuit, Soft Start

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

LDLN025M30R FAQ

1.How can I place an order for LDLN025M30R through Aetrix?

Please submit a Request for Quotation (RFQ) for LDLN025M30R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LDLN025M30R reliable?

The price and inventory of LDLN025M30R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LDLN025M30R is usually 5 days.

3.What payment methods are accepted for LDLN025M30R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LDLN025M30R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LDLN025M30R?

LDLN025M30R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LDLN025M30R order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LDLN025M30R?

For technical support, including LDLN025M30R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LDLN025M30R requirements.

6.How does Aetrix verify that LDLN025M30R is sourced from the original manufacturer or authorized distributors?

All LDLN025M30R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LDLN025M30R meets industry standards.

7.What is the process for return or replacement of LDLN025M30R?

All LDLN025M30R units undergo pre-shipment inspection (PSI). If there is an issue with LDLN025M30R, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LDLN025M30R part is unused and in its original packaging.

Return procedure for LDLN025M30R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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