Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics LD59015C30R

Name: LD59015C30R
Brand: STMicroelectronics
SKU: LD59015C30R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: LD59015C30R

Manufacturer:: STMicroelectronics

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

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: LD59015C30R.pdf

Description:: IC REG LINEAR 3V 150MA SOT323-5

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:383

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

LD59015C30R from STMicroelectronics is a 150 mA low-noise, high-PSRR linear voltage regulator delivering a fixed 3.0 V output with ±1.8% accuracy at 25 °C. It operates from 2.4 V to 5.5 V input, features 150 mV typical dropout at 150 mA, 20 µV_RMS output noise, and logic-controlled shutdown consuming ≤1 µA in OFF mode. Designed for battery-powered portable electronics requiring stable, clean power under light-to-moderate load.

For engineers reviewing the LD59015C30R datasheet, LD59015C30R pinout, LD59015C30R application, or LD59015C30R equivalent, key selection criteria include PSRR performance across 100 Hz–100 kHz, quiescent current behavior from no-load to full load, thermal shutdown threshold (160 °C), ceramic capacitor compatibility, and enable logic thresholds (0.4 V low / 0.9 V high).

Technical Context

The LD59015C30R uses a bandgap reference and internal trimming to maintain 3.0 V output with ±1.8% tolerance over -40 °C to 125 °C. Its error amplifier drives a P-channel pass transistor, enabling low dropout and high PSRR via feedforward compensation - achieving 80 dB at 100 Hz, 76 dB at 10 kHz, and 54 dB at 100 kHz.

Enable control is implemented as a CMOS-compatible digital input (Pin 3) with hysteresis-free logic thresholds: device turns on when V_EN > 0.9 V and off when V_EN < 0.4 V. Internal protection includes thermal shutdown (160 °C, 20 °C hysteresis) and short-circuit current limiting (~200 mA), with no external components required for stability using ≥1 µF ceramic output capacitance.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.0 V ±1.8% at 25 °C; maintains regulation across -40 °C to 125 °C junction temperature
Max Output Current	150 mA guaranteed; internally current-limited to ~200 mA during short-circuit events
Dropout Voltage	150 mV typical at 150 mA load; enables operation with VIN as low as 3.15 V while sustaining 3.0 V output
Output Noise	20 µV_RMS (10 Hz–100 kHz); suitable for powering noise-sensitive analog/RF circuitry without additional filtering
PSRR	80 dB @ 100 Hz, 76 dB @ 10 kHz, 54 dB @ 100 kHz; suppresses ripple from noisy DC-DC stages upstream
Quiescent Current	31 µA typical at no load; rises to 75 µA at 150 mA; drops to ≤1 µA in shutdown mode
Enable Thresholds	V_EN < 0.4 V = OFF; V_EN > 0.9 V = ON; compatible with 1.8 V and 3.3 V logic families

Pinout & Package

LD59015C30R is housed in a compact SOT323-5L surface-mount package (2.0 × 2.1 mm, 0.9 mm height), optimized for space-constrained portable designs and compatible with standard reflow profiles. The package features an exposed pad for improved thermal dissipation (R_thJA = 645.69 °C/W).

Pin/Terminal	Circuit Role	Design Meaning
1 (IN)	Input voltage supply	Accepts 2.4–5.5 V DC; must be decoupled with ≥1 µF ceramic capacitor near pin
2 (GND)	Power ground reference	Common return path for input, output, and enable circuits; connects to PCB ground plane
3 (EN)	Logic enable input	Active-high digital control: drives internal pass transistor gate; 0.1–100 nA input leakage
4 (N.C.)	No connection	Internally unconnected; must remain floating or tied to GND per layout best practice
5 (OUT)	Regulated output voltage	Delivers stable 3.0 V to load; requires ≥1 µF ceramic output capacitor for stability

Key Features

Feature	Design Value
Ultra-low noise regulation	20 µV_RMS output noise enables direct powering of ADC references and RF synthesizers
High PSRR across frequency bands	Maintains >75 dB rejection up to 10 kHz, critical for cleaning switcher-derived rail noise
Sub-µA shutdown current	≤1 µA total supply current in OFF mode extends battery life in always-on standby systems
Ceramic capacitor compatibility	Stable with 1–4.7 µF X5R/X7R ceramics; eliminates need for costly tantalum or electrolytic capacitors
Integrated thermal & current protection	Auto-recovering thermal shutdown (160 °C) and constant-current short-circuit limit prevent damage without external circuitry

Applications

Mobile Handsets

Wearable Health Sensors

Use Scenario: Powering baseband processor I/O rails and camera sensor interfaces in slim smartphone designs.

IC Role / Device Role / Timing Role: Low-noise post-regulator supplying clean 3.0 V to noise-sensitive analog front-ends and MIPI interfaces.

Use Value: 20 µV_RMS noise prevents image sensor pattern noise; 150 mV dropout preserves battery runtime down to 3.15 V cell voltage.

Use Scenario: Providing regulated supply to optical heart-rate monitor (PPG) analog signal chain and BLE SoC in wrist-worn devices.

IC Role / Device Role / Timing Role: Primary LDO for ultra-low-power mixed-signal subsystem requiring sub-100 µA quiescent draw in sleep mode.

Use Value: 31 µA no-load IQ and ≤1 µA shutdown minimize average current; ±1.8% accuracy ensures consistent LED drive and ADC reference scaling.

Industrial IoT Edge Nodes

Portable Medical Diagnostics

Use Scenario: Powering LoRaWAN transceiver modules and precision temperature/humidity sensors in battery-operated field nodes.

IC Role / Device Role / Timing Role: High-PSRR filter stage isolating sensitive analog sensors from switching regulator ripple on shared 3.3 V system rail.

Use Value: 80 dB PSRR at 100 Hz rejects low-frequency noise from DC-DC converters; -40 °C to 125 °C rating supports outdoor deployment.

Use Scenario: Supplying clinical-grade ECG front-end amplifiers and 16-bit SAR ADCs in handheld ECG analyzers.

IC Role / Device Role / Timing Role: Precision voltage source for analog signal conditioning path where noise directly impacts diagnostic resolution.

Use Value: 20 µV_RMS noise contributes <0.01% of full-scale ADC input noise floor; ±1.8% output tolerance meets IEC 60601-1 accuracy requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Torex XC6219B302MR-G	300 mA output, 25 µV_RMS noise, 65 dB PSRR @ 1 kHz, SOT-25 package	Higher current capability but lower PSRR above 1 kHz; less effective for high-frequency ripple suppression	Select when >150 mA load or smaller footprint (SOT-25 vs SOT323-5L) is prioritized over mid-band PSRR
Analog Devices ADP125ARHZ-3.0-R7	500 mA output, 40 µV_RMS noise, 70 dB PSRR @ 120 Hz, MSOP-8 package	Larger package, higher noise, and lower PSRR at 10 kHz; requires larger output capacitance (≥2.2 µF)	Choose only if higher output current and integrated soft-start are required, accepting trade-offs in noise and size

Compared with XC6219B302MR-G and ADP125ARHZ-3.0-R7, LD59015C30R delivers superior mid-frequency PSRR (76 dB @ 10 kHz) and lower noise (20 µV_RMS) in the smallest footprint, making it optimal for space- and noise-constrained battery-powered systems where 150 mA suffices.

Availability

LD59015C30R is available at Aetrix Electronics and suitable for mobile handsets, wearable health sensors, industrial IoT edge nodes, and portable medical diagnostics requiring stable component supply with guaranteed long-term manufacturability.

Supply support for LD59015C30R 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, designing and manufacturing microcontrollers, power management ICs, analog chips, and MEMS sensors for industrial, automotive, and consumer markets.

The LD59015 series belongs to ST's high-performance LDO portfolio, engineered specifically for ultra-low-noise, high-PSRR regulation in battery-powered portable electronics where efficiency, size, and signal integrity are critical.

FAQ

What is the minimum input voltage required to maintain 3.0 V output at 150 mA load?

The LD59015C30R has a typical dropout voltage of 150 mV at 150 mA, so the minimum valid input is 3.15 V. At temperatures beyond 25 °C or under worst-case process variation, the maximum dropout is 210 mV - requiring VIN ≥ 3.21 V to guarantee regulation across the full -40 °C to 125 °C range.

Can LD59015C30R be used with 1 µF ceramic output capacitors?

Yes - the device is explicitly characterized and guaranteed stable with 1 µF X5R/X7R ceramic capacitors (ESR 10–100 mΩ). The datasheet confirms stability across 1–4.7 µF, eliminating need for tantalum or aluminum electrolytics and reducing board area and cost.

How does the enable pin behave during power-up sequencing?

The EN pin requires V_EN > 0.9 V to activate regulation; turn-on time is 200 µs (time from EN crossing 0.9 V to V_OUT reaching 95% of 3.0 V). No external pull-up is needed - internal bias ensures defined state during undervoltage conditions, preventing erratic startup.

Is thermal shutdown latched or auto-recovering?

Thermal shutdown is auto-recovering: when junction temperature reaches 160 °C, the device disables output and cools; once temperature falls by ~20 °C hysteresis, regulation resumes automatically without requiring EN toggling or power cycle.

LD59015C30R Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 5-TSSOP, SC-70-5, SOT-353

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):: 0.21V @ 150mA

Current - Output:: 150mA

Current - Quiescent (Iq):: 60 µA

Current - Supply (Max):: 110 µA

PSRR:: -

Control Features:: Enable

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323-5

LD59015C30R FAQ

1.How can I place an order for LD59015C30R through Aetrix?

Please submit a Request for Quotation (RFQ) for LD59015C30R 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 LD59015C30R reliable?

The price and inventory of LD59015C30R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD59015C30R is usually 5 days.

3.What payment methods are accepted for LD59015C30R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD59015C30R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LD59015C30R?

LD59015C30R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LD59015C30R 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 LD59015C30R?

For technical support, including LD59015C30R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD59015C30R requirements.

6.How does Aetrix verify that LD59015C30R is sourced from the original manufacturer or authorized distributors?

All LD59015C30R 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 LD59015C30R meets industry standards.

7.What is the process for return or replacement of LD59015C30R?

All LD59015C30R units undergo pre-shipment inspection (PSI). If there is an issue with LD59015C30R, 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 LD59015C30R part is unused and in its original packaging.

Return procedure for LD59015C30R:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-11 Comparator Circuit: Voltage Thresholds, Op-Amp Differences, LM393 and Practical Design

Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …