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

STMicroelectronics LD2980ABM36TR

Name: LD2980ABM36TR
Brand: STMicroelectronics
SKU: LD2980ABM36TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LD2980ABM36TR

Manufacturer:: STMicroelectronics

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

Package:: SC-74A, SOT-753

Datasheet:: LD2980ABM36TR.pdf

Description:: IC REG LINEAR 3.6V 50MA SOT23-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

LD2980ABM36TR from STMicroelectronics is a 3.3 V ultra-low-dropout linear voltage regulator in SOT23-5L package, designed for battery-powered and low-noise systems. It delivers up to 50 mA output current with 7 mV typical dropout at 1 mA load, 80 µA typical quiescent current in active mode, and <1 µA shutdown current. Its logic-controlled INHIBIT pin enables system-level power gating in portable electronics.

For engineers reviewing the LD2980ABM36TR datasheet, LD2980ABM36TR pinout, LD2980ABM36TR application, or LD2980ABM36TR equivalent, key selection criteria include dropout voltage at light load, output noise (160 µVRMS), thermal shutdown threshold (170 °C), TTL-compatible inhibit interface, and stability with low-ESR ceramic capacitors down to 2.2 µF.

Technical Context

The LD2980ABM36TR uses a PNP pass transistor architecture enabling ultra-low dropout-just 7 mV at 1 mA-and maintains regulation down to VIN = VOUT + 0.007 V. Its internal feedback network sets nominal output to 3.30 V with ±0.5% tolerance over –40 to 125 °C.

It integrates logic-level inhibit control (VINH < 0.18 V disables output), thermal shutdown at 170 °C, and short-circuit current limiting (~150 mA). The device operates from 2.5 V to 16 V input and sustains stable regulation with 2.2 µF X7R ceramic output capacitor-no external compensation required.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	3.30 V ±0.5% (2.925–3.075 V over full temperature range), enabling precision biasing of 3.3 V logic and RF circuitry
Dropout Voltage	7 mV typ. at 1 mA load; ensures regulation even when input drops to 3.307 V-critical for single-cell Li-ion or coin-cell operation
Quiescent Current	80 µA typ. at no load; <1 µA in inhibit-off state-extends battery life in always-on sensor nodes and wearables
Output Noise	160 µVRMS (300 Hz–50 kHz); low enough for powering ADC references and RF synthesizers without added filtering
Supply Rejection	63 dB at 1 kHz; suppresses ripple from noisy DC-DC converters upstream, supporting mixed-signal SoC power domains
Operating Temp	–40 to 125 °C junction temperature; qualified for automotive cabin and industrial control environments
Shutdown Control	TTL-compatible INHIBIT pin (VIH ≥ 1.3 V, VIL ≤ 0.18 V); allows direct GPIO interfacing without level-shifting

Pinout & Package

SOT23-5L is a 5-pin surface-mount package (2.95 × 1.60 × 1.30 mm) with exposed thermal pad (not electrically connected), optimized for space-constrained PCBs and thermal performance (R_thJA = 255 °C/W).

Pin/Terminal	Circuit Role	Design Meaning
1 - VIN	Input supply connection	Accepts 2.5–16 V DC; requires 1 µF ceramic capacitor placed ≤0.5″ from pin to analog ground
2 - GND	Power ground reference	Common return for input/output capacitors and feedback network; must connect to clean analog ground plane
3 - INHIBIT	Logic enable/disable control	Pulled low (<0.18 V) disables output and reduces I_Q to <1 µA; not internally pulled up-must be actively driven
4 - NC	No-connect terminal	Internally unconnected; must remain floating-no trace or solder mask should contact this pad
5 - VOUT	Regulated output node	Delivers 3.3 V @ up to 50 mA; stable with ≥2.2 µF ceramic capacitor (X7R, low-ESR)

Key Features

Feature	Design Value
Ultra-low dropout	7 mV at 1 mA enables operation with minimal headroom-ideal for single-cell battery systems where VIN may dip near VOUT
Low-noise regulation	160 µVRMS output noise eliminates need for post-LDO RC filters in sensitive analog signal chains
Logic-controlled shutdown	INHIBIT pin supports system-level power sequencing and dynamic sleep-mode entry without external MOSFETs
Stable with ceramic caps	Validated with 2.2 µF X7R ceramic output capacitor-reduces BOM count and board area vs. tantalum alternatives
Wide input voltage range	2.5–16 V operation accommodates diverse sources: Li-ion, USB, industrial rails, and legacy 12 V systems

Applications

Portable Medical Sensors

Industrial IoT Edge Nodes

Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE radio and analog front-end.

IC Role / Device Role / Timing Role: Local 3.3 V regulator for BLE SoC and precision ADC reference.

Use Value: 7 mV dropout preserves battery runtime during low-VIN brownout; 160 µVRMS noise avoids ADC quantization errors.

Use Scenario: Wireless vibration sensor node mounted on motor housing with 10-year battery life target.

IC Role / Device Role / Timing Role: Primary power rail for ultra-low-power MCU and MEMS accelerometer.

Use Value: <1 µA shutdown current enables multi-year sleep between wake-ups; –40 to 125 °C rating ensures reliability in harsh enclosures.

Automotive Cabin Electronics

Wearable Health Trackers

Use Scenario: Digital rearview mirror with ambient light sensor and display driver IC.

IC Role / Device Role / Timing Role: Clean 3.3 V supply for image sensor interface and touch controller.

Use Value: 63 dB PSRR rejects ripple from vehicle's 12 V DC-DC converter; thermal shutdown protects against under-hood overheating.

Use Scenario: ECG patch with real-time heart-rate algorithm and NFC data upload.

IC Role / Device Role / Timing Role: Regulator for ASIC and NFC transceiver during brief active bursts.

Use Value: Fast load transient response (Figure 20) maintains VOUT stability during NFC transmission spikes; SOT23-5L footprint saves space on flexible PCB.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-3302E/TT	3.3 V, 250 mA, 1.6 µA quiescent current, no inhibit pin, SOT23-3	Lacks shutdown control; higher I_Q in active mode (1.6 µA vs. 80 µA) but lower than LD2980 in shutdown	Choose when system-level power gating is unnecessary and higher output current is needed
TCS2117-33IDBVR	3.3 V, 150 mA, 50 µA I_Q, integrated thermal foldback, SOT23-5	Lower quiescent current but no logic inhibit; thermal protection triggers at 150 °C (vs. 170 °C)	Prefer when ultra-low I_Q dominates design priority and GPIO-based shutdown is omitted

Compared with MCP1700T-3302E/TT and TCS2117-33IDBVR, the LD2980ABM36TR uniquely combines sub-10 mV dropout, TTL-compatible inhibit, and 160 µVRMS noise-making it optimal for battery-constrained, noise-sensitive, and dynamically powered systems where all three traits are simultaneously required.

Availability

LD2980ABM36TR is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, automotive cabin electronics, and wearable health trackers requiring stable component supply across long-lifecycle programs.

Supply support for LD2980ABM36TR 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 power management, microcontrollers, and analog ICs for industrial, automotive, and consumer markets.

The LD2980 series belongs to ST's ultra-low-I_Q LDO portfolio, engineered specifically for energy-harvesting and battery-operated devices demanding nanowatt-scale shutdown and millivolt-level dropout performance.

FAQ

What is the minimum output capacitance required for stability with LD2980ABM36TR?

The LD2980ABM36TR is stable with a minimum 2.2 µF X7R ceramic capacitor (low-ESR) on the output. This value is validated across –40 to 125 °C and full 1–50 mA load range. Using smaller values risks oscillation unless a series resistor is added per Figures 18–19 in the datasheet to emulate required ESR.

Can the INHIBIT pin be left unconnected?

No-the INHIBIT pin is not internally pulled up or down. Leaving it floating may cause unpredictable output behavior or increased quiescent current. When unused, tie it directly to VIN to ensure continuous regulation; when used, drive it with a clean digital signal meeting VIH ≥ 1.3 V and VIL ≤ 0.18 V.

Does LD2980ABM36TR support reverse current protection?

Yes-the internal PNP pass transistor lacks a body diode, preventing reverse current flow from VOUT to VIN. If VOUT exceeds VIN, only leakage through internal feedback resistors flows to GND (typ. 160 µA), eliminating need for an external blocking diode in backup-supply configurations.

How does thermal shutdown behave during sustained overload?

Thermal shutdown activates at 170 °C junction temperature and latches off the output until die temperature falls by ~20 °C. During overload, the device cycles on/off to limit average power dissipation-verified in Figure 8 (dropout vs. temperature) and Section 7.6 (reverse current test circuit).

LD2980ABM36TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 16V

Voltage - Output (Min/Fixed):: 3.6V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.225V @ 50mA

Current - Output:: 50mA

Current - Quiescent (Iq):: 150 µA

Current - Supply (Max):: 1.2 mA

PSRR:: 63dB (1kHz)

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-23-5

LD2980ABM36TR FAQ

1.How can I place an order for LD2980ABM36TR through Aetrix?

Please submit a Request for Quotation (RFQ) for LD2980ABM36TR 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 LD2980ABM36TR reliable?

The price and inventory of LD2980ABM36TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD2980ABM36TR is usually 5 days.

3.What payment methods are accepted for LD2980ABM36TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD2980ABM36TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LD2980ABM36TR?

LD2980ABM36TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LD2980ABM36TR 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 LD2980ABM36TR?

For technical support, including LD2980ABM36TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD2980ABM36TR requirements.

6.How does Aetrix verify that LD2980ABM36TR is sourced from the original manufacturer or authorized distributors?

All LD2980ABM36TR 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 LD2980ABM36TR meets industry standards.

7.What is the process for return or replacement of LD2980ABM36TR?

All LD2980ABM36TR units undergo pre-shipment inspection (PSI). If there is an issue with LD2980ABM36TR, 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 LD2980ABM36TR part is unused and in its original packaging.

Return procedure for LD2980ABM36TR:

1.Submit a request within 90 days.

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

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