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

STMicroelectronics L6932D1.5

Name: L6932D1.5
Brand: STMicroelectronics
SKU: L6932D1.5
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6932D1.5

Manufacturer:: STMicroelectronics

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

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: L6932D1.5.pdf

Description:: IC REG LINEAR 1.5V 2A 8SO

Quantity:: RFQ Add To RFQ list

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Inventory:2,628

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Product details

Overview

L6932D1.5 from STMicroelectronics is a 2A ultra-low-dropout linear regulator with fixed 1.5V output, operating from 2V to 14V input, 200mΩ max R_DS(on), 1% voltage accuracy, and integrated enable and power-good functions. It delivers stable I/O supply for processors and chipsets in mobile PCs and handheld instruments.

For engineers reviewing the L6932D1.5 datasheet, L6932D1.5 pinout, L6932D1.5 application, or L6932D1.5 equivalent, this page provides verified electrical parameters, SO-8 (4+4) package layout, thermal derating guidance, and real-world load regulation behavior under 0.1–2A current range.

Technical Context

The L6932D1.5 uses an internal 50mΩ N-channel MOSFET as pass element, enabling low dropout operation down to (V_IN – V_OUT) = 0.3V at 2A. Its error amplifier references a 1.25V internal bandgap and compares feedback against that to regulate output within ±1% over temperature and line/load variation.

It integrates dual protection: current limiting at 2.5A ±8% (sensed across the MOSFET), and thermal shutdown at 150°C with 20°C hysteresis. The open-drain PGOOD pin asserts low when V_OUT falls below 90% of nominal, supporting system power sequencing.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.5V ±1% (1.485–1.515V) at 0.1A, ensuring precise core I/O rail for Intel/AMD chipset interfaces.
Input Voltage Range	2V to 14V - supports direct connection to Li-ion battery stacks (2S–3S) or intermediate DC/DC outputs.
Max Output Current	2A continuous - sufficient for DDR memory termination or processor auxiliary rails without external boost.
R_DS(on)	≤200mΩ - limits dropout to ≤300mV at 1.5A, reducing heat generation in space-constrained PCB layouts.
Quiescent Current	200µA typical - enables always-on monitoring without compromising battery runtime in portable systems.
Load Regulation	≤15mV (0.1A → 2A) - maintains tight voltage stability during CPU burst loads or RAM refresh cycles.
Line Regulation	≤5mV (±10% VIN change) - rejects ripple from upstream switching converters feeding the LDO.
PGOOD Threshold	90% V_OUT with 10% hysteresis - provides clean, noise-immune power-sequencing signal for FPGA or SoC reset control.

Pinout & Package

Package: SO-8 (4+4), surface-mount, 1.27mm pitch, 5.0mm × 4.0mm body, 1.75mm max height per JEDEC MS-012. Thermal resistance (Junction-to-Ambient, demo board) = 62°C/W.

Pin/Terminal	Circuit Role	Design Meaning
1 - EN	Enable input	Active-high logic: tie to VIN for operation; pull to GND to disable regulator and reduce quiescent current to 25µA.
2 - IN	Input supply	Connects to drain of internal N-MOSFET; requires ≥10µF ceramic input capacitor for stability and transient response.
3 - GND	Ground reference	Four parallel GND pins (3,6,7,8) minimize impedance and improve PSRR by reducing ground bounce under 2A load steps.
4 - OUT	Regulated output	Source of internal N-MOSFET; connect ≥10µF output capacitor to maintain loop stability and suppress load-induced droop.
5 - PGOOD	Power-good indicator	Open-drain output; requires external pull-up to monitor V_OUT validity during startup and fault conditions.

Key Features

Feature	Design Value
Ultra-low dropout	Enables 1.5V output from 1.8V input at full 2A load - critical for battery-powered systems where every mV of headroom matters.
Integrated PGOOD	Eliminates need for external supervisor IC in compact designs - reduces BOM count and PCB area for mobile PC motherboard I/O rails.
Thermal shutdown with hysteresis	Prevents latch-up during overload; 20°C hysteresis ensures reliable recovery after cooling without oscillation or repeated cycling.
Current limit sensing on MOSFET	Provides accurate, temperature-stable short-circuit protection without external sense resistor - improves reliability in hot-plug applications.
SO-8 (4+4) thermal design	Four dedicated GND pins and exposed pad-compatible footprint enhance heat spreading - supports 1.5W continuous dissipation on standard 2oz copper.

Applications

Mobile PC Motherboard I/O Rail

Handheld Instrument Core Supply

Use Scenario: Powers DDR SDRAM termination and chipset I/O buffers on thin-and-light notebook motherboards with constrained thermal envelope.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR linear regulator delivering stable 1.5V at up to 2A with fast transient response to memory access bursts.

Use Value: Maintains <±15mV load regulation during 0.1–2A step changes, preventing data corruption in high-speed memory interfaces.

Use Scenario: Supplies microcontroller core voltage and analog front-end in portable multimeters and oscilloscopes powered by single-cell Li-ion batteries.

IC Role / Device Role / Timing Role: Ultra-low-quiescent LDO enabling >100-hour battery life while sustaining 1.5V rail during measurement sampling and display updates.

Use Value: Draws only 200µA quiescent current and regulates accurately down to 2V input - extends usable battery range to near end-of-discharge.

PCMCIA Card Power Management

Processor Auxiliary Rail

Use Scenario: Provides regulated 1.5V to legacy PCMCIA Type II cards inserted into industrial laptops or docking stations.

IC Role / Device Role / Timing Role: Hot-swap-capable LDO with enable control and PGOOD signaling to coordinate card insertion detection and power ramp-up.

Use Value: EN pin allows software-controlled power gating; PGOOD confirms rail readiness before host controller initialization.

Use Scenario: Supplies secondary voltage domain (e.g., PCIe PHY, USB transceiver, or cache SRAM) in embedded x86 or ARM-based systems.

IC Role / Device Role / Timing Role: Precision-adjusted 1.5V source with ±1% accuracy and low noise - meets tight voltage tolerance requirements of high-speed serial interfaces.

Use Value: Delivers 60–75dB ripple rejection at 120Hz, suppressing switching noise from adjacent DC/DC converters.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TSM1085CP	1.5V fixed, 3A rating, 340mΩ R_DS(on), no PGOOD, SO-8 package	Lacks power-good signaling and has higher dropout - unsuitable for sequenced power domains requiring status feedback.	Select if higher current headroom is needed and PGOOD is not required; verify thermal margin with 340mΩ R_DS(on).
AP2112K-1.5	1.5V fixed, 600mA max, 170mΩ R_DS(on), SOT-23-5 package, no EN/PGOOD	Lower current capability and no enable or PGOOD - limited to low-power peripherals, not processor I/O rails.	Choose only for space-constrained, sub-1A applications where sequencing and 2A delivery are unnecessary.

Compared with TSM1085CP and AP2112K-1.5, the L6932D1.5 uniquely combines 2A delivery, integrated PGOOD, EN control, and 200mΩ R_DS(on) in SO-8 - making it the only option among the three qualified for sequenced, high-current motherboard I/O regulation.

Availability

L6932D1.5 is available at Aetrix Electronics and suitable for mobile PC motherboards, handheld instrument power subsystems, and PCMCIA card interface circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for L6932D1.5 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 analog, power, MCU, and sensor solutions for automotive, industrial, and consumer markets.

The L6932 series belongs to ST's high-performance linear regulator product line, engineered specifically for low-noise, high-current I/O and memory supply in portable computing and instrumentation platforms.

FAQ

What is the minimum input voltage required for stable 1.5V output at 2A?

The L6932D1.5 maintains regulation down to VIN = VOUT + (IOUT × RDS(on)) = 1.5V + (2A × 0.2Ω) = 1.9V. However, ST specifies 2V minimum input across temperature and process variation to guarantee 1% accuracy and stability - use ≥2.1V in production designs for margin.

Can the L6932D1.5 be used with ceramic output capacitors?

Yes, but caution is required: low-ESR ceramics may cause instability in the adjustable version due to zero placement. For the fixed 1.5V version (L6932D1.5), 10µF X5R/X7R ceramics are fully supported per the datasheet; no external compensation is needed unless using <1µF or ultra-low-ESR types.

How does the PGOOD pin behave during thermal shutdown?

During thermal shutdown, the output remains regulated until junction temperature reaches 150°C; PGOOD stays asserted high. Once shutdown activates, VOUT collapses and PGOOD pulls low within microseconds - providing immediate fault indication before catastrophic failure.

Is there a recommended PCB layout for thermal performance?

Yes: maximize copper area connected to all four GND pins (pins 3,6,7,8) using thermal vias to inner and bottom layers; place IN and OUT capacitors within 5mm of respective pins; avoid routing high-current traces over sensitive analog sections - ST's demo board achieves 62°C/W with 4 cm² of 2oz copper.

L6932D1.5 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 14V

Voltage - Output (Min/Fixed):: 1.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: -

Current - Output:: 2A

Current - Quiescent (Iq):: 400 µA

Current - Supply (Max):: -

PSRR:: 75dB (120Hz)

Control Features:: Enable, Power Good

Protection Features:: Over Temperature, Short Circuit

Operating Temperature:: -25°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

L6932D1.5 FAQ

1.How can I place an order for L6932D1.5 through Aetrix?

Please submit a Request for Quotation (RFQ) for L6932D1.5 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 L6932D1.5 reliable?

The price and inventory of L6932D1.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6932D1.5 is usually 5 days.

3.What payment methods are accepted for L6932D1.5?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6932D1.5 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6932D1.5?

L6932D1.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6932D1.5 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 L6932D1.5?

For technical support, including L6932D1.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6932D1.5 requirements.

6.How does Aetrix verify that L6932D1.5 is sourced from the original manufacturer or authorized distributors?

All L6932D1.5 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 L6932D1.5 meets industry standards.

7.What is the process for return or replacement of L6932D1.5?

All L6932D1.5 units undergo pre-shipment inspection (PSI). If there is an issue with L6932D1.5, 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 L6932D1.5 part is unused and in its original packaging.

Return procedure for L6932D1.5:

1.Submit a request within 90 days.

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

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