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 LD39130SJ29R

Name: LD39130SJ29R
Brand: STMicroelectronics
SKU: LD39130SJ29R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: LD39130SJ29R

Manufacturer:: STMicroelectronics

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

Package:: 4-UFBGA, FCBGA

Datasheet:: LD39130SJ29R.pdf

Description:: IC REG LIN 2.9V 300MA 4FLIPCHIP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:257

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

Product details

Overview

LD39130SJ29R from STMicroelectronics is a 2.9 V fixed-output, 300 mA ultra-low-dropout linear regulator (LDO) with automatic green mode, designed for space-constrained battery-powered systems. It delivers ±1.0% output accuracy at 25 °C, 300 mV typical dropout at 300 mA, and operates from 1.4 V to 5.5 V input. Its Flip-chip 4-bump (0.69 × 0.69 mm, 0.4 mm pitch) package enables minimal PCB footprint in portable media players and digital still cameras.

For engineers reviewing the LD39130SJ29R datasheet, LD39130SJ29R pinout, LD39130SJ29R application, or LD39130SJ29R equivalent, key selection criteria include green-mode quiescent current (1 µA), shutdown current (0.1 µA typ.), ceramic capacitor compatibility (≥330 nF), thermal protection (160 °C shutdown), and logic-controlled enable functionality.

Technical Context

The LD39130SJ29R integrates an internal bandgap reference, fast-turn-on RC filter, and load-current-detection circuitry to autonomously switch between green mode (ultra-low IQ) and normal mode (fast transient response). Its green mode activation threshold is 1–2 mA, and deactivation occurs above 10 mA - enabling dynamic power optimization without external control logic.

It features internal soft-start (100 µs turn-on time), output discharge path (100 Ω resistance when disabled), and foldback current limiting (50 mA short-circuit current). The device uses a PMOS pass transistor architecture optimized for low dropout and high PSRR (70 dB at 1 kHz).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.9 V ±1.0% at 25 °C; supports stable regulation across -40 °C to 125 °C junction temperature.
Max Output Current	300 mA guaranteed; internally current-limited with foldback protection activating at 50 mA during short-circuit.
Dropout Voltage	300 mV typical at 300 mA load; enables operation with VIN as low as 3.2 V while maintaining regulated 2.9 V output.
Quiescent Current	1 µA typical in green mode (IOUT ≈ 0 mA); 45 µA in normal mode; 0.1 µA in shutdown (VEN = GND).
PSRR	70 dB at 1 kHz (VIN ripple ±0.1 V), critical for noise-sensitive analog rails in camera sensor or audio subsystems.
Output Noise	100 µV_RMS (10 Hz–100 kHz), measured at 1 mA load; ensures clean supply for low-noise ADCs or RF front-ends.
Thermal Protection	160 °C junction shutdown with 20 °C hysteresis; prevents permanent damage during sustained overload or poor heatsinking.

Pinout & Package

LD39130SJ29R is housed in an ultra-compact Flip-chip 4-bump package (0.69 × 0.69 mm, 0.4 mm pitch), optimized for minimal board area and thermal performance (R_thJA = 130 °C/W). This CSP variant lacks GM and ADJ pins - green mode is always active and output is fixed at 2.9 V.

Pin/Terminal	Circuit Role	Design Meaning
1 (B2)	GND	Common ground reference for all internal circuits; must be connected to low-impedance system ground plane.
2 (B1)	EN	Active-high enable input; pulled down internally; drives device into <0.1 µA shutdown when held low.
3 (A1)	IN	Main input voltage terminal (1.4–5.5 V); requires ≥1 µF ceramic decoupling capacitor placed adjacent to pin.
4 (A2)	OUT	Regulated 2.9 V output; supports ≥330 nF ceramic capacitor; includes internal 100 Ω discharge path to GND when disabled.

Key Features

Feature	Design Value
Automatic Green Mode	Self-switching between 1 µA (light load) and 45 µA (full load) quiescent current - no external control required.
Ceramic Capacitor Stability	Stable with C_OUT ≥ 330 nF; eliminates need for tantalum or electrolytic capacitors, reducing size and improving reliability.
Internal Soft-Start	100 µs controlled ramp-up prevents inrush current spikes during power-up - avoids brownout in shared supply rails.
Output Discharge Path	Integrated 100 Ω MOSFET between OUT and GND activates on disable - rapidly discharges output capacitance for safe sequencing.
Thermal & Foldback Protection	160 °C shutdown + 20 °C hysteresis plus current foldback limits power dissipation during fault conditions.

Applications

Mobile Phone Power Rail

Digital Still Camera Sensor Supply

Use Scenario: Providing clean, low-noise 2.9 V bias to CMOS image sensor analog core and PLL circuits.

IC Role / Device Role / Timing Role: Primary LDO for image sensor analog domain; supplies critical clock generation and ADC reference paths.

Use Value: 100 µV_RMS output noise and 70 dB PSRR suppress switching noise from baseband SoC, preventing image artifacts.

Use Scenario: Regulating power to autofocus motor driver ICs and flash LED controllers during burst capture.

IC Role / Device Role / Timing Role: High-transient-response LDO delivering 300 mA peak current with <100 µs startup for rapid actuator activation.

Use Value: Fast green-to-normal mode transition (<10 mA threshold) ensures immediate response to motor current demand spikes.

Cordless Phone Baseband Core

Portable Media Player Audio Codec

Use Scenario: Supplying 2.9 V to low-power DSP and RF transceiver ICs in battery-operated cordless handsets.

IC Role / Device Role / Timing Role: System-level LDO managing standby-to-active state transitions; enables sub-µA deep-sleep current.

Use Value: 0.1 µA shutdown current extends battery life during idle periods; green mode maintains 1 µA IQ during light processing.

Use Scenario: Powering stereo audio DAC and headphone amplifier in compact MP3 players with single-cell Li-ion input.

IC Role / Device Role / Timing Role: Low-noise, low-dropout source for audio signal chain; interfaces directly with ceramic output caps.

Use Value: 300 mV dropout allows full 2.9 V output even as battery discharges to 3.2 V, maximizing runtime and dynamic range.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Torex XC6210B292MR-G	2.9 V fixed, 300 mA, 250 mV dropout, 1 µA IQ, SOT-25 package (2.9 × 2.8 mm).	Larger footprint; lacks green mode auto-switching - requires external enable control for low-IQ states.	Select if board layout permits SOT-25 and discrete enable sequencing is already implemented.
Richtek RT9013-29GB	2.9 V fixed, 300 mA, 350 mV dropout, 2.5 µA IQ (no green mode), DFN-6 (1.5 × 1.5 mm).	No load-dependent IQ modulation; higher dropout reduces usable input voltage range vs. LD39130SJ29R.	Choose when cost sensitivity outweighs green-mode efficiency gains and thermal constraints allow larger package.

Compared with XC6210B292MR-G and RT9013-29GB, LD39130SJ29R uniquely combines ultra-small Flip-chip packaging, true automatic green mode (no external control), and lowest dropout - making it optimal for space- and battery-life-critical portable designs where dynamic load profiles vary widely.

Availability

LD39130SJ29R is available at Aetrix Electronics and suitable for mobile phones, digital still cameras, and cordless phone systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for LD39130SJ29R 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 automotive, industrial, and consumer markets.

The LD39130S family targets ultra-low-power portable electronics, with the SJ variant optimized for miniaturized battery-powered devices needing fixed-output, green-mode efficiency, and ceramic-capacitor compatibility.

FAQ

What is the minimum input voltage required for LD39130SJ29R to regulate 2.9 V?

The LD39130SJ29R requires a minimum input voltage of 3.2 V to maintain regulation at 2.9 V output under full 300 mA load, based on its 300 mV typical dropout voltage. At lighter loads, regulation is possible down to 1.4 V input, but output will drop below 2.9 V if VIN falls below VOUT + VDROP.

Can LD39130SJ29R be used with a 330 nF output capacitor?

Yes - the datasheet explicitly confirms stability with COUT ≥ 330 nF ceramic capacitor. This value meets the minimum capacitance requirement and enables use of ultra-small 0201- or 0402-size MLCCs, supporting the device's ultra-compact Flip-chip package integration.

Does LD39130SJ29R support remote sensing?

No - remote sensing is only supported in the adjustable-version LD39130S (DFN6 package with ADJ pin). The SJ29R variant is fixed-output and lacks both ADJ and GM pins; its feedback is internal, so output voltage accuracy depends solely on internal bandgap and error amplifier performance.

How does the green mode function behave in the SJ29R package?

In the SJ29R Flip-chip variant, green mode is always enabled and cannot be disabled - unlike the DFN6 version which offers GM pin control. The device automatically switches between 1 µA (green) and 45 µA (normal) quiescent current based on load current thresholds (1–2 mA entry, >10 mA exit), with no external intervention required.

LD39130SJ29R Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 4-UFBGA, FCBGA

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):: 2.9V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.3V @ 300mA (Typ)

Current - Output:: 300mA

Current - Quiescent (Iq):: 45 µA

Current - Supply (Max):: -

PSRR:: 70dB ~ 65dB (1kHz ~ 10kHz)

Control Features:: Enable

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

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 4-FlipChip (.69x.69)

LD39130SJ29R FAQ

1.How can I place an order for LD39130SJ29R through Aetrix?

Please submit a Request for Quotation (RFQ) for LD39130SJ29R 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 LD39130SJ29R reliable?

The price and inventory of LD39130SJ29R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD39130SJ29R is usually 5 days.

3.What payment methods are accepted for LD39130SJ29R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD39130SJ29R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LD39130SJ29R?

LD39130SJ29R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LD39130SJ29R 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 LD39130SJ29R?

For technical support, including LD39130SJ29R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD39130SJ29R requirements.

6.How does Aetrix verify that LD39130SJ29R is sourced from the original manufacturer or authorized distributors?

All LD39130SJ29R 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 LD39130SJ29R meets industry standards.

7.What is the process for return or replacement of LD39130SJ29R?

All LD39130SJ29R units undergo pre-shipment inspection (PSI). If there is an issue with LD39130SJ29R, 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 LD39130SJ29R part is unused and in its original packaging.

Return procedure for LD39130SJ29R:

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 …