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MIC5319-3.3BD5
Microchip Technology
IC REG LIN 3.3V 500MA TSOT23-5
23778 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 500mA TSOT-23-5
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5.0 / 5.0
- (189 Ratings)
MIC5319-3.3BD5
Product Overview
1340731
DiGi Electronics Part Number
MIC5319-3.3BD5-DGManufacturer
Microchip Technology
MIC5319-3.3BD5
Description
IC REG LIN 3.3V 500MA TSOT23-5Inventory
23778 Pcs New Original In Stock
Linear Voltage Regulator IC Positive Fixed 1 Output 500mA TSOT-23-5
Quantity
Minimum 1
Minimum 1
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MIC5319-3.3BD5 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)
5.5V
Voltage - Output (Min/Fixed)
3.3V
Voltage - Output (Max)
-
Voltage Dropout (Max)
0.4V @ 500mA
Current - Output
500mA
Current - Quiescent (Iq)
150 µA
PSRR
70dB ~ 60dB (1kHz ~ 10kHz)
Control Features
Enable
Protection Features
Over Current, Over Temperature
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SOT-23-5 Thin, TSOT-23-5
Supplier Device Package
TSOT-23-5
Base Product Number
MIC5319
Datasheet & Documents
HTML Datasheet
MIC5319-3.3BD5-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Standard Package
1
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)
Dec 02, 2025
ディジ・エレクトロニクスの価格設定は明確で、安心して取引できると感じています。
Dec 02, 2025
Their staff is super approachable, making complex tech choices simple and affordable.
Dec 02, 2025
Great prices and a support system that truly cares about customer experience.
Dec 02, 2025
Every time I shop with DiGi Electronics, I know what to expect—top-notch product consistency and honest pricing.
Dec 02, 2025
I appreciate how they handle every query with patience and expertise.
Dec 02, 2025
Their price advantage is obvious, especially when comparing similar products elsewhere.
Dec 02, 2025
The high standards of quality at DiGi Electronics never waver.
Dec 02, 2025
I highly recommend DiGi Electronics for their price advantage and reliable after-sales service.
Dec 02, 2025
Their excellent quality and pricing make them my go-to brand.
Dec 02, 2025
Their swift after-sales response has significantly reduced downtime in our operations.
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Frequently Asked Questions (FAQ)
Can I still design in the MIC5319-3.3BD5 for a new low-power industrial sensor node, given that it's marked as obsolete and RoHS non-compliant?
Designing in the MIC5319-3.3BD5 for new products is strongly discouraged due to its obsolete status and RoHS non-compliance, which may violate environmental regulations in many markets. While it remains electrically functional and available in limited stock, future supply chain disruptions are likely. For new designs, consider pin-compatible alternatives like the RT9193-33GB or SP6205EM5-L-3-3/TR, which offer similar performance with modern compliance and lifecycle support. If you must use the MIC5319-3.3BD5 for legacy compatibility, secure a long-term inventory commitment and document the compliance risk in your BOM review process.
What are the key risks of replacing the MIC5319-3.3BD5 with the RT9193-33GB in an existing 3.3V, 400mA application, and how can I validate compatibility?
Replacing the MIC5319-3.3BD5 with the RT9193-33GB is generally safe for 3.3V, 400mA loads, but critical differences exist: the RT9193-33GB has a lower dropout voltage (0.25V vs. 0.4V at 500mA), which improves efficiency in low-headroom scenarios, and it operates down to -40°C like the original. However, the enable logic threshold and quiescent current differ slightly—verify enable signal compatibility and standby power budget. Both are in TSOT-23-5 packages, so PCB reuse is feasible. Validate with a prototype under full load and thermal stress, especially if your input voltage is near 3.7V, where dropout behavior becomes critical.
How does the MIC5319-3.3BD5’s PSRR performance affect noise-sensitive analog circuits like 24-bit ADCs, and should I add additional filtering?
The MIC5319-3.3BD5 provides 70dB PSRR at 1kHz, decreasing to 60dB at 10kHz, which is adequate for moderate noise rejection but may be insufficient for high-precision 24-bit ADC front ends without additional filtering. In such applications, power supply noise above 10kHz can alias into the signal band. To mitigate risk, add a 10µF ceramic input capacitor and a 10µF + 1Ω RC filter at the output. This improves high-frequency rejection and stabilizes transient response. Always test PSRR impact in your actual layout, as parasitic inductance can degrade performance despite datasheet claims.
Is the MIC5319-3.3BD5 suitable for automotive under-hood applications where ambient temperatures can exceed 105°C, and what derating should I apply?
The MIC5319-3.3BD5 is rated for -40°C to 125°C junction temperature, making it technically capable of under-hood use, but thermal design is critical. At 105°C ambient, even modest loads can push the junction beyond safe limits due to limited SOT-23-5 thermal dissipation. For a 500mA load with 5V input (1.7W dissipation), you’d need significant copper pour or a heatsink—often impractical in compact designs. Derate output current to ≤300mA above 85°C ambient and perform thermal imaging validation. Consider automotive-qualified alternatives like the NCV8163AML330TCG for higher reliability and AEC-Q100 compliance.
Can I parallel two MIC5319-3.3BD5 regulators to increase output current beyond 500mA for a burst-mode RF module, and what are the stability risks?
Paralleling two MIC5319-3.3BD5 regulators is not recommended due to lack of current-sharing features and tight output voltage tolerances (±2%). Even minor mismatches can cause one regulator to carry most of the load, leading to thermal runaway under burst conditions. Additionally, the shared feedback node creates instability risks during transient load steps, potentially causing oscillation. Instead, select a single regulator rated for your peak current (e.g., MIC29302WU for 3A) or use a dedicated load-sharing controller. If you must parallel them, add 0.1–0.2Ω ballast resistors on each output and validate thermal balance under worst-case duty cycles—but this approach increases dropout and reduces efficiency.
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.
MIC5319-3.3BD5 CAD Models
Microchip Technology MIC5319-3.3BD5 PCB symbols & footprints
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