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

STMicroelectronics LD39020TPU32R

Name: LD39020TPU32R
Brand: STMicroelectronics
SKU: LD39020TPU32R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LD39020TPU32R

Manufacturer:: STMicroelectronics

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

Package:: 4-XDFN Exposed Pad

Datasheet:: LD39020TPU32R.pdf

Description:: IC REG LINEAR 3.2V 200MA 4DFN

Quantity:: RFQ Add To RFQ list

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Inventory:10,000

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Product details

Overview

LD39020TPU32R from STMicroelectronics is a 3.2 V, ±0.5 % accuracy, 200 mA ultra-low-dropout linear regulator with 200 mV typical dropout at full load, 20 µA typical quiescent current, and logic-controlled enable. It operates from 1.5 V to 5.5 V input and supports ceramic output capacitors as low as 0.47 µF - designed for precision power rail regulation in space-constrained portable electronics.

For engineers reviewing the LD39020TPU32R datasheet, LD39020TPU32R pinout, LD39020TPU32R application, or LD39020TPU32R equivalent, key selection criteria include output voltage tolerance (±0.5 %), thermal shutdown threshold (160 °C), soft-start timing (100 µs), PSRR (80 dB @ 1 kHz), and compatibility with DFN4 1x1 or SOT23-5L PCB footprints.

Technical Context

The LD39020TPU32R integrates a bandgap reference, error amplifier, and PMOS pass transistor in a fully internal feedback loop. Its ultra-low dropout stems from the PMOS architecture enabling near-rail operation - critical for battery-powered systems where VIN may dip close to VOUT.

It features dual-mode enable control (active-high EN pin), internal soft-start limiting inrush current, and optional output discharge MOSFET (not present in TPU32R variant per order code table). Thermal protection activates at 160 °C with 20 °C hysteresis, and short-circuit current is internally limited to 250–350 mA.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	3.2 V ±0.5 % at 25 °C - ensures stable MCU core or sensor supply under varying load/temperature.
Max Output Current	200 mA guaranteed - sufficient for powering low-power microcontrollers, RF transceivers, or image sensors.
Dropout Voltage	200 mV typ. @ 200 mA - enables regulation down to VIN = 3.4 V, extending battery runtime in single-cell Li-ion or Li-poly systems.
Quiescent Current	20 µA typ. @ no load - minimizes standby power loss in always-on subsystems like real-time clocks or wake-up circuits.
PSRR	80 dB @ 1 kHz - suppresses switching noise from adjacent DC-DC converters feeding shared input rails.
Enable Threshold	V_EN(H) = 1 V min., V_EN(L) = 0.4 V max. - compatible with 1.8 V and 3.3 V logic families without level-shifting.
Operating Temp	−40 °C to +125 °C junction - qualified for automotive cabin and industrial edge node environments.
Stability Cap	0.47 µF ceramic C_OUT - reduces BOM count and board area vs. larger tantalum or electrolytic alternatives.

Pinout & Package

LD39020TPU32R is available in two compact packages: DFN4 1×1 mm (0.4 mm height) and SOT23-5L. Both are RoHS-compliant, thermally enhanced, and support automated assembly. The DFN4 variant includes an exposed thermal pad connected to GND for improved heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
IN	Input voltage supply	Accepts 1.5–5.5 V; requires ≥1 µF ceramic decoupling placed adjacent to pin.
GND	Power ground reference	Common return for IN, OUT, and EN; thermal pad (DFN4) must be soldered to PCB GND plane.
EN	Logic enable input	Active-high control: <0.4 V = shutdown (<0.1 µA I_STANDBY), >1 V = active regulation.
OUT	Regulated output	Delivers 3.2 V ±0.5 %; stable with 0.47–22 µF ceramic capacitor (X5R/X7R recommended).
NC	No connect	Not internally bonded - leave unconnected and unpopulated on PCB (SOT23-5L Pin 4).

Key Features

Feature	Design Value
Ultra-low dropout	200 mV @ 200 mA enables use with depleted batteries or low-headroom inputs.
Low-noise regulation	45 µV_RMS (10 Hz–100 kHz) supports noise-sensitive analog circuits like ADC references or audio codecs.
Internal soft-start	100 µs controlled ramp prevents inrush current spikes during power-up - eliminates need for external RC networks.
Thermal & current protection	Auto-recovery thermal shutdown (160 °C) and foldback current limiting ensure robustness under fault conditions.
Ceramic capacitor compatible	Stable with 0.47 µF X5R/X7R output cap - reduces cost, size, and aging drift vs. electrolytics.

Applications

Mobile Phone Power Management

Digital Still Camera Sensor Supply

Use Scenario: Regulating 3.2 V supply for baseband processor I/O or camera interface logic in slim smartphone designs.

IC Role / Device Role / Timing Role: Primary LDO delivering clean, low-noise voltage to high-speed digital interfaces requiring tight voltage tolerance.

Use Value: ±0.5 % accuracy and 80 dB PSRR prevent data corruption from supply ripple during burst transmission or image capture.

Use Scenario: Providing stable 3.2 V bias to CMOS image sensor analog front-end and ADC driver stages.

IC Role / Device Role / Timing Role: Low-noise post-regulator isolating sensitive analog circuitry from noisy system rails.

Use Value: 45 µV_RMS output noise and 0.47 µF ceramic stability minimize fixed-pattern noise and quantization errors.

Tablet Application Processor Core Rail

Cordless Phone Baseband IC Supply

Use Scenario: Delivering 3.2 V to low-power application processor cores during sleep/wake transitions.

IC Role / Device Role / Timing Role: Enable-controlled LDO enabling rapid power gating of non-critical subsystems.

Use Value: 20 µA quiescent current and sub-0.1 µA shutdown current extend standby battery life beyond 30 days.

Use Scenario: Powering 3.2 V logic and RF sections in rechargeable DECT handsets operating from 3.6 V Li-ion cells.

IC Role / Device Role / Timing Role: Input-to-output regulator maintaining regulation as cell voltage drops from 4.2 V to 3.4 V.

Use Value: 200 mV dropout allows uninterrupted operation until battery reaches end-of-discharge threshold.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Torex XC6210B322MR-G	3.2 V ±1.0 % accuracy, 150 mA output, 150 mV dropout @ 100 mA, no enable pin	Lacks logic control and thermal shutdown; limited to simpler, lower-current loads	Select when enable functionality and 200 mA headroom are not required and cost is primary constraint.
ROHM BD39020FP-E2	3.2 V ±2.0 % accuracy, 200 mA, 250 mV dropout @ 200 mA, 35 µA I_Q, SOT-23-5 only	Looser tolerance and higher quiescent current reduce precision and battery life in low-power modes	Choose only if ST's ±0.5 % grade is unavailable and system tolerances allow ±2.0 % variation.

Compared with XC6210B322MR-G and BD39020FP-E2, LD39020TPU32R delivers tighter output accuracy, lower quiescent current, and integrated enable/thermal protection - making it optimal for battery-critical, high-precision embedded systems where reliability and efficiency are prioritized over minimal BOM cost.

Availability

LD39020TPU32R is available at Aetrix Electronics and suitable for mobile phones, digital still cameras, and cordless phone systems requiring stable component supply across extended production lifecycles and temperature ranges.

Supply support for LD39020TPU32R 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 silicon solutions for automotive, industrial, and consumer markets.

LD39020 belongs to ST's high-accuracy, ultra-low-I_Q LDO family targeting portable and battery-operated equipment where efficiency, small footprint, and precision regulation are essential.

FAQ

What is the minimum output capacitor required for stable operation of LD39020TPU32R?

The LD39020TPU32R is stable with a minimum 0.47 µF X5R or X7R ceramic capacitor on the output. While the control loop functions down to 220 nF, 0.47 µF is the recommended minimum to ensure stability across temperature, input voltage, and load variations per Figure 17 in DS9956.

Does LD39020TPU32R include the output discharge feature?

No. LD39020TPU32R does not integrate the output discharge MOSFET. Per Table 10 in DS9956, only part numbers with "AD" prefix (e.g., LD39020ADTPU32R) or "D" suffix (e.g., LD39020DTPU32R) include auto-discharge; "T" suffix denotes standard version without this function.

Can LD39020TPU32R operate with a 1.5 V input while regulating 3.2 V output?

No. LD39020TPU32R cannot regulate 3.2 V output from 1.5 V input because the input voltage must exceed the output voltage by at least the dropout voltage. With 200 mV typical dropout, minimum valid input is 3.4 V. The 1.5–5.5 V range applies only to configurations where VOUT ≤ VIN − VDROP.

What is the thermal resistance of LD39020TPU32R in DFN4 1x1 package?

In DFN4 1x1 package, LD39020TPU32R has R_thJA = 250 °C/W (junction-to-ambient, standard JEDEC 2-layer board) and R_thJC = 45 °C/W (junction-to-case, measured to thermal pad). These values assume full thermal pad soldering to a dedicated GND plane per Figure 29 in DS9956.

LD39020TPU32R 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):: 3.2V

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)

LD39020TPU32R FAQ

1.How can I place an order for LD39020TPU32R through Aetrix?

Please submit a Request for Quotation (RFQ) for LD39020TPU32R 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 LD39020TPU32R reliable?

The price and inventory of LD39020TPU32R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LD39020TPU32R is usually 5 days.

3.What payment methods are accepted for LD39020TPU32R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LD39020TPU32R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LD39020TPU32R?

LD39020TPU32R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LD39020TPU32R 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 LD39020TPU32R?

For technical support, including LD39020TPU32R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LD39020TPU32R requirements.

6.How does Aetrix verify that LD39020TPU32R is sourced from the original manufacturer or authorized distributors?

All LD39020TPU32R 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 LD39020TPU32R meets industry standards.

7.What is the process for return or replacement of LD39020TPU32R?

All LD39020TPU32R units undergo pre-shipment inspection (PSI). If there is an issue with LD39020TPU32R, 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 LD39020TPU32R part is unused and in its original packaging.

Return procedure for LD39020TPU32R:

1.Submit a request within 90 days.

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

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