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

STMicroelectronics LD39020DTPU13R

Name: LD39020DTPU13R
Brand: STMicroelectronics
SKU: LD39020DTPU13R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LD39020DTPU13R

Manufacturer:: STMicroelectronics

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

Package:: 4-XDFN Exposed Pad

Datasheet:: LD39020DTPU13R.pdf

Description:: IC REG LINEAR 1.3V 200MA 4DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

LD39020DTPU13R from STMicroelectronics is a 200 mA ultra-low-dropout linear voltage regulator with 1.3 V fixed output, 200 mV typical dropout at 200 mA, ±2.0 % output accuracy at 25 °C, and 20 µA typical quiescent current at no load. It integrates logic-controlled shutdown, internal soft-start, and optional output discharge-designed for space-constrained, battery-powered systems such as digital still cameras and portable media players.

For engineers reviewing the LD39020DTPU13R datasheet, LD39020DTPU13R pinout, LD39020DTPU13R application, or LD39020DTPU13R equivalent, key selection criteria include dropout performance under 200 mA load, standby current below 0.1 µA in off mode, ceramic capacitor compatibility (≥0.47 µF), thermal protection behavior, and DFN4 1x1 package footprint constraints.

Technical Context

The LD39020DTPU13R employs a bandgap-referenced error amplifier with internal bias generator and thermal protection circuitry. Its enable input (EN) directly controls an internal PMOS pass transistor, allowing fast turn-on (100 µs) and full shutdown with sub-0.1 µA supply current.

It features an integrated output discharge MOSFET (enabled in DT variants like this one), activated during EN low to rapidly deplete VOUT capacitance. Stability is ensured with ceramic output capacitors ≥0.47 µF and ESR <15 Ω across –40 °C to 125 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.3 V - matches core voltage requirements of low-power microcontrollers and image sensors.
Max Output Current	200 mA - sufficient for powering single-core SoCs or camera ISP subsystems without external boost.
Dropout Voltage	200 mV typ. @ 200 mA - enables operation down to VIN = 1.5 V while maintaining regulation at VOUT = 1.3 V.
Quiescent Current	20 µA typ. @ no load - extends battery life in always-on sensor nodes or standby modes.
PSRR	80 dB @ 1 kHz - suppresses switching noise from adjacent DC/DC converters feeding shared input rails.
Operating Temp	–40 °C to 125 °C - qualified for industrial and automotive cabin-adjacent applications (e.g., rearview camera modules).
Shutdown Current	0.03 µA typ. @ VEN = GND - ensures negligible drain during system sleep states.
Output Discharge	Enabled (DT variant) - discharges VOUT via internal 100 Ω MOSFET when disabled, preventing residual voltage hold-up.

Pinout & Package

LD39020DTPU13R is packaged in DFN4 1x1 (1.0 mm × 1.0 mm, 0.4 mm height), featuring wettable flank terminations for automated optical inspection. The exposed thermal pad must be soldered to PCB ground for optimal thermal performance (R_thJA = 250 °C/W).

Pin	Circuit Role	Design Meaning
1	OUT	Regulated 1.3 V output - connects to load and 0.47–22 µF ceramic capacitor; requires low-ESR layout.
2	GND	Analog/digital common reference - ties to PCB ground plane and thermal pad; critical for PSRR and stability.
3	EN	Active-high enable input - driven high (>1 V) for regulation; pulled low (<0.4 V) for shutdown + discharge.
4	IN	Input supply (1.5–5.5 V) - requires ≥1 µF ceramic capacitor placed adjacent to pin for transient immunity.
Thermal Pad	GND	Internal die thermal path - must be connected to solid copper pour on PCB layer for junction temperature control.

Key Features

Feature	Design Value
Ultra-low dropout	200 mV @ 200 mA enables use with single-cell Li-ion (3.0 V min) or two-cell alkaline (2.4 V min) inputs.
Logic-controlled shutdown	EN pin reduces total supply current to 0.03 µA - eliminates need for external load switches in power sequencing.
Internal soft-start	100 µs controlled ramp prevents inrush current spikes into downstream capacitive loads (e.g., FPGA I/O banks).
Ceramic capacitor compatible	Stable with C_OUT ≥ 0.47 µF, X5R/X7R dielectric - avoids tantalum cost/size and enables ultra-compact layouts.
Output discharge	Integrated 100 Ω NMOS discharges VOUT within milliseconds after EN deactivation - prevents latch-up in multi-rail systems.
Thermal & current protection	Auto-recovery thermal shutdown at 160 °C with 20 °C hysteresis; internal foldback current limit prevents damage during short-circuit events.

Applications

Digital Still Camera (DSC)

Portable Media Player

Use Scenario: Powers image signal processor (ISP) core rail requiring clean, stable 1.3 V at up to 180 mA during video capture.

IC Role / Device Role / Timing Role: Primary LDO delivering regulated core voltage; replaces discrete regulators with higher dropout and noise.

Use Value: 45 µV_RMS output noise and 80 dB PSRR ensure minimal clock jitter and SNR degradation in analog front-end circuits.

Use Scenario: Supplies audio codec VDDIO rail in Bluetooth headphones, where battery voltage drops from 4.2 V to 3.0 V over discharge cycle.

IC Role / Device Role / Timing Role: Low-noise post-regulator for DAC/ADC interface - maintains signal integrity despite varying input.

Use Value: 200 mV dropout allows uninterrupted 1.3 V output until battery reaches 1.5 V, maximizing usable runtime.

Mobile Phone Baseband

Cordless Phone Handset

Use Scenario: Provides 1.3 V supply to cellular modem's RF transceiver bias circuitry during burst transmission.

IC Role / Device Role / Timing Role: Fast-response LDO handling dynamic load steps up to 200 mA with <10 mV load regulation error.

Use Value: 100 µs soft-start prevents supply droop during modem wake-up, avoiding reset or PLL unlock events.

Use Scenario: Regulates 1.3 V for DECT chipset and microphone preamp in rechargeable cordless handsets.

IC Role / Device Role / Timing Role: Standby-optimized LDO enabling >1-month shelf life on single NiMH cell (1.2 V nominal).

Use Value: 0.03 µA shutdown current minimizes self-discharge, preserving charge during infrequent use periods.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Torex XC6210B132MR-G	1.3 V fixed, 150 mA max, 120 mV dropout @ 100 mA, 1 µA I_Q, no discharge MOSFET	Lacks output discharge; lower current rating limits use in ISP or modem loads	Select if ultra-low I_Q dominates over discharge requirement and load ≤150 mA
Richtek RT9013-13GB	1.3 V fixed, 300 mA max, 250 mV dropout @ 300 mA, 60 µA I_Q, no discharge, SOT23-5 only	Higher I_Q and no discharge; larger SOT23-5 footprint vs. DFN4 1x1	Select if higher output current is needed and board area permits SOT23-5

Compared with XC6210B132MR-G and RT9013-13GB, LD39020DTPU13R uniquely balances 200 mA capability, 20 µA I_Q, integrated discharge, and 1x1 mm DFN - making it optimal for miniaturized, battery-sensitive imaging and communication modules where rapid rail shutdown and compact layout are mandatory.

Availability

LD39020DTPU13R is available at Aetrix Electronics and suitable for digital still cameras, portable media players, and cordless phone handsets requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LD39020DTPU13R 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, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.

LD39020 belongs to ST's high-accuracy, ultra-low-I_Q LDO family - engineered specifically for space- and energy-constrained portable electronics where dropout, noise, and shutdown behavior directly impact battery life and signal fidelity.

FAQ

What is the minimum input voltage required for regulation at 1.3 V output?

The LD39020DTPU13R maintains regulation down to VIN = 1.5 V due to its 200 mV typical dropout voltage at 200 mA. At light loads, dropout falls to 35 mV, enabling stable 1.3 V output even with VIN as low as 1.335 V - critical for extending runtime in single-cell battery systems.

Does LD39020DTPU13R require an external capacitor on the EN pin for noise immunity?

No external capacitor is needed on the EN pin. The device features built-in hysteresis and filtering; electrical specs confirm reliable operation with VEN logic thresholds of 0.4 V (low) and 1 V (high) across –40 °C to 125 °C, and input leakage remains ≤100 nA - eliminating susceptibility to PCB trace noise.

Can LD39020DTPU13R be used with a 0.22 µF output capacitor?

No - the datasheet specifies a minimum stable C_OUT of 0.47 µF for guaranteed loop stability across temperature and load. While 220 nF may work under narrow conditions, using 0.22 µF risks oscillation or poor transient response, especially with load steps >50 mA or temperature extremes beyond 25 °C.

How does the output discharge function behave during EN assertion?

When EN transitions from high to low, the internal discharge MOSFET (RON ≈ 100 Ω) activates immediately, sinking current from VOUT to GND. This discharges a 10 µF output capacitor to <100 mV in <1 ms - preventing back-powering of upstream circuits and ensuring safe power-down sequencing in multi-rail systems.

LD39020DTPU13R Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 4-XDFN Exposed Pad

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):: 1.3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.35V @ 200mA

Current - Output:: 200mA

Current - Quiescent (Iq):: 40 µA

Current - Supply (Max):: -

PSRR:: 80dB ~ 55dB (1kHz ~ 100kHz)

Control Features:: Enable

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

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 4-DFN (1x1)

LD39020DTPU13R FAQ

1.How can I place an order for LD39020DTPU13R through Aetrix?

Please submit a Request for Quotation (RFQ) for LD39020DTPU13R 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 LD39020DTPU13R reliable?

The price and inventory of LD39020DTPU13R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD39020DTPU13R is usually 5 days.

3.What payment methods are accepted for LD39020DTPU13R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD39020DTPU13R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LD39020DTPU13R?

LD39020DTPU13R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LD39020DTPU13R 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 LD39020DTPU13R?

For technical support, including LD39020DTPU13R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD39020DTPU13R requirements.

6.How does Aetrix verify that LD39020DTPU13R is sourced from the original manufacturer or authorized distributors?

All LD39020DTPU13R 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 LD39020DTPU13R meets industry standards.

7.What is the process for return or replacement of LD39020DTPU13R?

All LD39020DTPU13R units undergo pre-shipment inspection (PSI). If there is an issue with LD39020DTPU13R, 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 LD39020DTPU13R part is unused and in its original packaging.

Return procedure for LD39020DTPU13R:

1.Submit a request within 90 days.

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

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