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LP3965ESX-1.8/NOPB
Texas Instruments
IC REG LINEAR 1.8V 1.5A DDPAK
1492 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
- (342 Ratings)
LP3965ESX-1.8/NOPB
Product Overview
1523407
DiGi Electronics Part Number
LP3965ESX-1.8/NOPB-DGManufacturer
Texas Instruments
LP3965ESX-1.8/NOPB
Description
IC REG LINEAR 1.8V 1.5A DDPAKInventory
1492 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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LP3965ESX-1.8/NOPB Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Output Configuration
Positive
Output Type
Fixed
Number of Regulators
1
Voltage - Input (Max)
7V
Voltage - Output (Min/Fixed)
1.8V
Voltage - Output (Max)
-
Voltage Dropout (Max)
0.55V @ 1.5A
Current - Output
1.5A
Current - Quiescent (Iq)
9 mA
Current - Supply (Max)
15 mA
PSRR
-
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
LP3965
Datasheet & Documents
HTML Datasheet
LP3965ESX-1.8/NOPB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Affected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
296-35454-2-DG
LP3965ESX18NOPB
296-35454-1-DG
296-35454-6-DG
LP3965ESX-1.8-NDR
296-35454-6
296-LP3965ESX-1.8/NOPBCT
LP3965ESX-1.8/NOPB-DG
296-35454-2
296-35454-1
2156-LP3965ESX-1.8/NOPB-TI
296-LP3965ESX-1.8/NOPBDKR
296-LP3965ESX-1.8/NOPBTR
TEXTISLP3965ESX-1.8/NOPB
Standard Package
500
Alternative Parts
PART 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
我特別喜歡他們的環保包裝，既美觀又發揮環保理念，配送速度也是頂尖的，值得讚賞！
de desembre 02, 2025
Leur respect des délais est constant, une vraie valeur ajoutée.
de desembre 02, 2025
物流追跡情報が詳細で、安心感がありました。
de desembre 02, 2025
I was pleased to see how dedicated DiGi Electronics is to reducing environmental impact through their packaging.
de desembre 02, 2025
Their professional and friendly customer service post-purchase sets them apart in the industry.
de desembre 02, 2025
DiGi Electronics’s stock levels and after-sales care are critical to our ongoing success.
de desembre 02, 2025
Their inventory processes are well-designed, reducing wastage and overstocking.
de desembre 02, 2025
I trust DiGi Electronics because of their unwavering commitment to quality.
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Frequently Asked Questions (FAQ)
What are the key thermal design considerations when using the LP3965ESX-1.8/NOPB in a high-ambient temperature environment?
When using the LP3965ESX-1.8/NOPB in environments approaching its maximum operating temperature of 125°C, thermal management is critical due to power dissipation from its linear regulation. At 1.5A load and a 7V-to-1.8V drop, it dissipates over 7.8W. Without an adequate PCB copper pour or heatsink connected to the DDPAK thermal pad, junction temperature can exceed safe limits. Use at least 1 in² of 2-oz copper with thermal vias to inner ground planes to improve thermal resistance. Simulate worst-case conditions considering air flow and nearby heat sources to avoid thermal shutdown or accelerated aging.
Can the LP3965ESX-1.8/NOPB replace the TPS7A4700 in a low-noise 1.8V rail design, and what are the trade-offs?
While both are 1.8V regulators, the LP3965ESX-1.8/NOPB is a linear regulator with higher dropout (550 mV at 1.5A) compared to the ultra-low-dropout TPS7A4700 (225 mV at 1A), but the TPS7A4700 is a low-noise LDO optimized for precision analog. The LP3965ESX-1.8/NOPB lacks specified PSRR and noise performance, making it less suitable for sensitive analog supplies. However, if cost and simplicity are priorities in a digital 1.8V rail (e.g., for FPGAs or DSPs), the LP3965ESX-1.8/NOPB may serve as a robust, higher-current linear option—just confirm acceptable thermal and efficiency trade-offs.
How does the enable pin behavior affect sequencing in systems with multiple voltage rails using the LP3965ESX-1.8/NOPB?
The LP3965ESX-1.8/NOPB features an active-high enable pin, which must be driven to a logic-high level (typically >2V) to turn on the regulator. In power supply sequencing applications, this can complicate coordination with other regulators that use active-low enables or require precise turn-on timing. To safely integrate the LP3965ESX-1.8/NOPB into a sequence, use a voltage supervisor or sequencer IC with programmable delays to ensure it powers up only after bias rails stabilize. Avoid leaving the enable pin floating—tie it through a pull-up resistor if not actively driven.
What are the risks of operating the LP3965ESX-1.8/NOPB near its maximum 7V input voltage with a 1.5A load?
Operating the LP3965ESX-1.8/NOPB at 7V input with 1.5A output creates significant power dissipation (7V - 1.8V) × 1.5A = 7.8W, which poses severe thermal challenges. Even with optimal PCB heatsinking, the junction temperature may approach or exceed 150°C, triggering thermal shutdown. This reduces reliability and can lead to intermittent operation. Consider using an intermediate buck converter to step down from 7V to ~3.3V before feeding the LP3965ESX-1.8/NOPB, significantly reducing power loss and improving long-term reliability.
Is the LP3965ESX-1.8/NOPB suitable for automotive applications with wide input transients, and how does its protection compare to the LM2937-1.8?
The LP3965ESX-1.8/NOPB operates from -40°C to 125°C and includes over-current, over-temperature, and short-circuit protection, making it viable for automotive underhood use. However, its 7V absolute maximum input voltage limits its ability to handle load dump transients without external clamping, unlike the LM2937-1.8 which is rated for 26V and designed specifically for 12V automotive systems. For robust automotive integration, the LP3965ESX-1.8/NOPB must be preceded by transient voltage suppressors (TVS) or a pre-regulator stage. Choose the LM2937-1.8 for direct battery connection; use the LP3965ESX-1.8/NOPB only in protected, post-regulated subsystems.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
LP3965ESX-1.8/NOPB CAD Models
Texas Instruments LP3965ESX-1.8/NOPB PCB symbols & footprints
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