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LP3872ES-3.3
Texas Instruments
IC REG LINEAR 3.3V 1.5A DDPAK
4128 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 1.5A TO-263 (DDPAK-5)
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5.0 / 5.0
- (115 Ratings)
LP3872ES-3.3
Product Overview
1295814
DiGi Electronics Part Number
LP3872ES-3.3-DGManufacturer
Texas Instruments
LP3872ES-3.3
Description
IC REG LINEAR 3.3V 1.5A DDPAKInventory
4128 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 1.5A TO-263 (DDPAK-5)
Quantity
Minimum 1
Minimum 1
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LP3872ES-3.3 Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Packaging
-
Series
-
Product Status
Obsolete
Output Configuration
Positive
Output Type
Fixed
Number of Regulators
1
Voltage - Input (Max)
7V
Voltage - Output (Min/Fixed)
3.3V
Voltage - Output (Max)
-
Voltage Dropout (Max)
0.55V @ 1.5A
Current - Output
1.5A
Current - Quiescent (Iq)
5 mA
Current - Supply (Max)
15 mA
PSRR
73dB ~ 57dB (120Hz)
Control Features
Enable
Protection Features
Over Current, Over Temperature, Short Circuit
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Supplier Device Package
TO-263 (DDPAK-5)
Base Product Number
LP3872
Datasheet & Documents
HTML Datasheet
LP3872ES-3.3-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Standard Package
45
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
L’expédition a été ultra rapide et l’emballage très soigné et sécurisé.
de desembre 02, 2025
My order was shipped out swiftly, and I received it in perfect condition.
de desembre 02, 2025
DiGi Electronics provides outstanding after-sales support that truly exceeds expectations.
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Frequently Asked Questions (FAQ)
Can the LP3872ES-3.3 still be safely used in new designs despite being marked as obsolete by Texas Instruments?
While the LP3872ES-3.3 is listed as obsolete, it remains available in stock from authorized distributors and is not subject to immediate end-of-life discontinuation. However, using it in new designs introduces long-term supply chain risks, including potential future unavailability and lack of manufacturer support. If your design requires long product lifecycles or high-volume production, consider migrating to a recommended substitute like the LP3872ES-3.3/NOPB (the RoHS-compliant version) or the LP3962ES-3.3/NOPB, which offers similar performance with ongoing availability and full compliance. Always verify lifecycle status with your distributor and include a second-source strategy in your BOM planning.
What are the key thermal design considerations when using the LP3872ES-3.3 in a compact PCB layout with high ambient temperatures?
The LP3872ES-3.3 in a TO-263 (DDPAK-5) package relies heavily on PCB copper area for heat dissipation, especially when operating near its 1.5A output current and input voltages above 5V. At 7V input and 1.5A load, power dissipation can exceed 5.5W, requiring a well-designed thermal pad with multiple vias to an internal or bottom-layer ground plane. In high ambient environments (e.g., >50°C), ensure adequate airflow or consider derating the output current. Without proper thermal management, the internal over-temperature protection may trigger, causing output shutdown. Use thermal simulation tools or empirical testing to validate junction temperatures under worst-case conditions.
How does the LP3872ES-3.3 compare to the LP3962ES-3.3/NOPB for noise-sensitive analog applications, and can it be a drop-in replacement?
The LP3872ES-3.3 has a PSRR of 73dB at 120Hz, which is excellent for a linear regulator, but the LP3962ES-3.3/NOPB offers improved PSRR (up to 75dB at 1kHz) and lower output noise, making it better suited for noise-sensitive analog circuits like ADCs or RF stages. While both share the same DDPAK-5 footprint and pinout, the LP3962 has a slightly lower dropout voltage (0.4V vs. 0.55V at 1.5A), improving efficiency at low input voltages. It is a near drop-in replacement, but verify enable logic levels and quiescent current in your system. For new designs, the LP3962ES-3.3/NOPB is preferred due to better noise performance and active production status.
Is it safe to operate the LP3872ES-3.3 with input voltages close to its 7V maximum, especially under transient conditions?
Operating the LP3872ES-3.3 near its 7V absolute maximum input voltage increases the risk of damage during voltage transients, such as load dumps in automotive environments or inductive spikes in industrial systems. The device lacks built-in input overvoltage protection, so even brief excursions above 7V can degrade or destroy the IC. To mitigate this, use a TVS diode or input clamp circuit rated below 7V, and ensure your power supply has tight regulation. Additionally, consider adding a small input capacitor (≥10µF ceramic) close to the pin to absorb high-frequency transients. For harsh environments, evaluate more robust alternatives like the LP3855ES-3.3/NOPB, which supports up to 12V input.
What are the risks of replacing the LP3872ES-3.3 with the LP3852ES-3.3 in an existing design, and what parameters must be rechecked?
Replacing the LP3872ES-3.3 with the LP3852ES-3.3 is feasible due to similar voltage and current ratings, but critical differences exist: the LP3852 has a higher dropout voltage (0.6V at 1.5A vs. 0.55V), which may cause regulation failure if the input voltage is marginal (e.g., 3.9V input). Additionally, the LP3852 has a lower PSRR and lacks the enable pin, which could affect power sequencing in your system. Verify thermal performance, as the higher dropout increases power dissipation. Also confirm that the control logic (if using the enable function on the LP3872) is handled externally. Always retest stability, transient response, and thermal behavior in the actual application before full deployment.
Quality Assurance (QC)
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LP3872ES-3.3 CAD Models
Texas Instruments LP3872ES-3.3 PCB symbols & footprints
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