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

STMicroelectronics LD59015C12R

Name: LD59015C12R
Brand: STMicroelectronics
SKU: LD59015C12R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LD59015C12R

Manufacturer:: STMicroelectronics

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

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

Datasheet:: LD59015C12R.pdf

Description:: IC REG LIN 1.2V 150MA SOT323-5

Quantity:: RFQ Add To RFQ list

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Inventory:250

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Product details

Overview

LD59015C12R from STMicroelectronics is a 150 mA low-noise, high-PSRR linear voltage regulator delivering a fixed 1.2 V output with ±1.8% accuracy at 25 °C, 2.4–5.5 V input range, 150 mV typical dropout, and 20 µV_RMS output noise. It features logic-controlled shutdown (EN pin), operates down to −40 °C, and targets power-sensitive battery-powered systems.

For engineers reviewing the LD59015C12R datasheet, LD59015C12R pinout, LD59015C12R application, or LD59015C12R equivalent, key selection criteria include quiescent current (31 µA typ. at no load), PSRR (80 dB @ 100 Hz), ceramic capacitor compatibility, thermal/short-circuit protection, and SOT323-5L package constraints.

Technical Context

The LD59015C12R uses an internal bandgap reference (0.8 V) with resistor divider feedback to regulate 1.2 V output. Its enable circuitry accepts TTL-compatible logic thresholds (VEN < 0.4 V for OFF, > 0.9 V for ON), enabling precise system-level power sequencing.

Stability is guaranteed with ≥1 µF ceramic output capacitance and ESR ≤10 Ω. Internal current limiting (200 mA short-circuit) and thermal shutdown (160 °C with 20 °C hysteresis) provide robust fault protection without external components.

Key Specifications

Parameter	Value and Actual Design Meaning
Output voltage	Fixed 1.2 V ±1.8% at 25 °C - ensures stable core/bias rail for low-voltage logic and RF sections
Max output current	150 mA guaranteed - supports moderate-current peripherals like sensors or BLE radios
Quiescent current	31 µA typ. at no load - extends battery life in always-on monitoring modes
PSRR	80 dB @ 100 Hz, 76 dB @ 10 kHz - suppresses switching noise from adjacent DC-DC converters
Output noise	20 µV_RMS (10 Hz–100 kHz) - meets low-noise analog supply requirements for ADCs and op-amps
Dropout voltage	150 mV typ. at 150 mA - enables operation from single-cell Li-ion (3.0 V min) or two-cell alkaline
Enable threshold	V_EN(H) = 0.9 V min, V_EN(L) = 0.4 V max - interfaces directly with 1.8 V or 3.3 V GPIO without level shifters

Pinout & Package

Package: SOT323-5L - 5-pin ultra-small surface-mount package (2.0 × 2.1 mm footprint, 0.9 mm height), RoHS-compliant and ECOPACK® certified.

Pin/Terminal	Circuit Role	Design Meaning
1 IN	Input voltage supply	Accepts 2.4–5.5 V DC; requires local 1 µF ceramic decoupling
2 GND	Power ground reference	Low-impedance return path for load and regulator internal circuits
3 EN	Logic enable control	Active-high input; drives device into sub-1 µA shutdown when pulled low
4 N.C.	No connection	Internally unconnected; must be left floating or tied to GND (no electrical effect)
5 OUT	Regulated output	Delivers 1.2 V ±1.8%; requires ≥1 µF ceramic output capacitor for stability

Key Features

Feature	Design Value
Ultra-low noise regulation	20 µV_RMS output noise enables clean power for precision analog signal chains
High PSRR across frequency	80 dB at 100 Hz and 76 dB at 10 kHz maintains immunity against coupled ripple from PMICs
Sub-1 µA shutdown mode	0.001–1 µA I_IN in OFF state preserves battery charge during deep sleep
Ceramic capacitor compatibility	Stable with 1–4.7 µF X5R/X7R ceramics - eliminates need for costly tantalum or electrolytic caps
Integrated protection	Thermal shutdown (160 °C) and constant-current short-circuit limiting prevent field failure

Applications

Wearable Health Monitor

Bluetooth LE Sensor Node

Use Scenario: Continuous ECG/PPG sensing powered by coin cell or thin-film battery.

IC Role / Device Role / Timing Role: Primary 1.2 V analog supply for ADC front-end and low-power MCU core.

Use Value: 20 µV_RMS noise and ±1.8% tolerance ensure baseline stability and SNR integrity over temperature.

Use Scenario: Battery-operated environmental sensor transmitting data via Bluetooth Low Energy.

IC Role / Device Role / Timing Role: Always-on 1.2 V rail for RF transceiver bias and wake-up controller.

Use Value: 31 µA quiescent current extends shelf life; EN pin enables synchronized power gating with radio activity.

Industrial Handheld Scanner

Smart Home Motion Detector

Use Scenario: Ruggedized barcode scanner using single-cell Li-ion with intermittent high-current laser/decoder bursts.

IC Role / Device Role / Timing Role: Stable 1.2 V supply for image sensor interface and microcontroller I/O bank.

Use Value: 150 mV dropout allows full utilization of battery voltage down to 2.4 V; 150 mA rating supports burst-mode operation.

Use Scenario: PIR-based occupancy detector with multi-year battery life requirement.

IC Role / Device Role / Timing Role: Regulated 1.2 V source for ultra-low-power motion detection ASIC and wireless SoC.

Use Value: Sub-1 µA shutdown current minimizes leakage during 99.9% idle time; −40 °C to 125 °C rating ensures outdoor reliability.

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 XC6210B122MR-G	150 mA, 1.2 V, 25 µV_RMS noise, 65 dB PSRR @ 1 kHz, SOT-25 package (5-pin)	Lacks enable pin; fixed ON-state only - unsuitable for dynamic power gating	Select if enable functionality is unnecessary and lower cost is prioritized
Micrel MIC5205-1.2YM5-TR	150 mA, 1.2 V, 30 µV_RMS noise, 70 dB PSRR @ 120 Hz, SOT-23-5 package	Higher quiescent current (80 µA typ.), wider output tolerance (±2%), no thermal hysteresis spec	Select if board layout favors SOT-23-5 footprint and 30 µV_RMS noise is acceptable

Compared with XC6210B122MR-G and MIC5205-1.2YM5-TR, the LD59015C12R uniquely combines sub-1 µA shutdown, 20 µV_RMS noise, and 80 dB PSRR in a thermally robust SOT323-5L package - making it optimal for battery-constrained, noise-sensitive, and power-gated designs.

Availability

LD59015C12R is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, industrial handheld scanners, and smart home motion detectors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LD59015C12R 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 belongs to ST's high-performance LDO family targeting ultra-low-noise, high-PSRR regulation in space-constrained, battery-powered applications - emphasizing quiescent current optimization, ceramic capacitor compatibility, and integrated protection.

FAQ

What is the minimum input voltage required for stable 1.2 V output at 150 mA load?

The LD59015C12R requires VIN ≥ VOUT + VDROP = 1.2 V + 150 mV = 1.35 V minimum under nominal conditions. However, its specified operating input range starts at 2.4 V per datasheet Section 4 - ensuring guaranteed performance, PSRR, and thermal margin across temperature and process variation. Below 2.4 V, regulation and protection features are not assured.

Can the LD59012C12R operate without an enable signal connected?

Yes - the EN pin defaults to active-high when left open or pulled up externally. With no external pull-down, the device powers on at power-up. However, for deterministic startup and shutdown control, ST recommends connecting EN to a controlled GPIO or using a pull-up resistor (e.g., 100 kΩ to VIN) to avoid floating states that may cause erratic behavior during power ramp.

Is a bypass capacitor required on the IN pin, and what value is recommended?

Yes - a 1 µF ceramic capacitor is recommended between IN and GND, placed as close as possible to pins 1 and 2. This reduces high-frequency input impedance, suppresses PCB trace inductance effects, and improves transient response. The datasheet confirms stability with CIN = COUT = 1 µF in all typical application circuits and transient test conditions.

Does the LD59015C12R support output voltages other than 1.2 V?

No - LD59015C12R is a fixed-output variant specifying 1.2 V only. Other members of the LD59015 family offer factory-set outputs from 1.2 V to 3.3 V in 100 mV increments (e.g., LD59015C15R = 1.5 V), but each part number corresponds to one precise voltage; no external resistor programming is supported.

LD59015C12R 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):: 1.2V

Voltage - Output (Max):: -

Voltage Dropout (Max):: -

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

LD59015C12R FAQ

1.How can I place an order for LD59015C12R through Aetrix?

Please submit a Request for Quotation (RFQ) for LD59015C12R 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 LD59015C12R reliable?

The price and inventory of LD59015C12R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD59015C12R is usually 5 days.

3.What payment methods are accepted for LD59015C12R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD59015C12R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LD59015C12R?

LD59015C12R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LD59015C12R 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 LD59015C12R?

For technical support, including LD59015C12R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD59015C12R requirements.

6.How does Aetrix verify that LD59015C12R is sourced from the original manufacturer or authorized distributors?

All LD59015C12R 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 LD59015C12R meets industry standards.

7.What is the process for return or replacement of LD59015C12R?

All LD59015C12R units undergo pre-shipment inspection (PSI). If there is an issue with LD59015C12R, 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 LD59015C12R part is unused and in its original packaging.

Return procedure for LD59015C12R:

1.Submit a request within 90 days.

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

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