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Diodes Incorporated AP78L08SG-13
- Part No.:
- AP78L08SG-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP78L08SG-13.pdf
- Description:
- IC REG LINEAR 8V 100MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,882
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Product details
Overview
AP78L08SG-13 from Diodes Incorporated is a fixed-output +8.0 V, 100 mA three-terminal positive linear voltage regulator in SO-8 package with ±5% output tolerance, internal thermal overload protection, and short-circuit current limiting. It delivers stable local regulation for logic supplies in consumer audio and optical storage systems, requiring no external components beyond input/output capacitors.
For engineers reviewing the AP78L08SG-13 datasheet, AP78L08SG-13 pinout, AP78L08SG-13 application, or AP78L08SG-13 equivalent, key selection criteria include dropout voltage (≤2.0 V at 40 mA), ripple rejection (≥37 dB at 120 Hz), quiescent current (2–5.5 mA), and SO-8 thermal resistance (θJA = 153 °C/W).
Technical Context
The AP78L08SG-13 implements a monolithic series pass transistor regulator architecture with built-in safe-area protection that reduces short-circuit current as pass transistor voltage increases. Its internal bandgap reference ensures stable 8.0 V output across -20°C to +85°C ambient.
It operates with a minimum input voltage of 9.7 V to maintain line regulation and supports peak output current up to 140 mA. The SO-8 package enables surface-mount assembly with defined thermal pad layout per AP02001, delivering 153 °C/W junction-to-ambient thermal resistance under standard PCB conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +8.0 V ±5% (guaranteed over -20°C to +125°C junction temp) |
| Max Output Current | 100 mA continuous (140 mA peak); limited by internal safe-area and thermal protection |
| Input Voltage Range | 10.5 V to 23 V (ensures regulation and ≥37 dB ripple rejection) |
| Quiescent Current | 2–5.5 mA (low bias draw enables efficient standby operation) |
| Ripple Rejection | 37–46 dB at 120 Hz (suppresses AC line noise in power supply filtering) |
| Droput Voltage | ≤2.0 V at 40 mA (defines minimum VIN–VOUT differential for regulation) |
| Thermal Resistance θJA | 153 °C/W (SO-8 on 2 oz copper FR-4; dictates heatsinking requirements) |
Pinout & Package
AP78L08SG-13 uses the industry-standard SO-8 package (4.85 × 6.10 mm body, 1.27 mm pitch), RoHS-compliant and green molding compound (no Br/Sb). Pin 1 is VIN, pins 2–3 and 5–6 are GND, pin 4 is VOUT, and pins 7–8 are NC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Unregulated DC input (10.5–23 V); requires 0.33 µF bypass capacitor if >3″ from bulk filter |
| 2, 3, 5, 6 | GND | Common ground reference for input, output, and internal circuitry; multiple pins reduce impedance |
| 4 | VOUT | Regulated +8.0 V output; requires 0.1 µF ceramic capacitor for stability and noise suppression |
| 7, 8 | NC | No internal connection; must be left unconnected or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +8.0 V output | Eliminates external resistor network; simplifies BOM and layout for logic rail generation |
| ±5% output tolerance | Meets TTL/CMOS logic supply accuracy requirements without post-regulation trimming |
| Internal short-circuit limiting | Clamps peak output current to ≤140 mA, protecting both IC and load during fault conditions |
| Thermal overload shutdown | Automatically disables output above 150°C junction temperature, enabling self-recovery after cooling |
| No external components required | Reduces board area and cost vs. discrete Zener/resistor regulators; only two small ceramics needed |
Applications
| CD-ROM Drive Power | DVD Player Logic Supply |
|---|---|
|
Use Scenario: Local +8 V rail for servo motor control ICs and laser diode bias circuitry in CD-ROM drives. IC Role / Device Role / Timing Role: Primary low-noise analog and digital supply regulator, decoupling main PSU ripple. Use Value: 54 µV output noise and ≥37 dB ripple rejection prevent servo jitter and read-error spikes during high-speed disc rotation. |
Use Scenario: Dedicated +8 V supply for MPEG decoder ASICs and front-panel microcontroller in DVD players. IC Role / Device Role / Timing Role: Local point-of-load regulator replacing Zener/resistor networks on mainboard. Use Value: 100 mA output current and ±5% tolerance ensure stable clocking and data integrity in video decoding pipelines. |
| Set-Top Box Tuner Module | Hi-Fi Audio DAC Supply |
|
Use Scenario: Isolated +8 V rail for QAM demodulator and tuner IF amplifiers in digital cable set-top boxes. IC Role / Device Role / Timing Role: Noise-sensitive analog supply regulator with low quiescent current for always-on subsystems. Use Value: 2–5.5 mA IQ enables low-power standby mode while maintaining fast wake-up response for channel tuning. |
Use Scenario: Clean +8 V bias for stereo DACs and op-amp output stages in compact Hi-Fi receivers. IC Role / Device Role / Timing Role: Low-noise analog voltage reference source for precision audio conversion. Use Value: 54 µV RMS output noise (10 Hz–100 kHz) preserves dynamic range and minimizes audible hiss in line-level outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC78L08ACDR2G | Same +8 V output, ±5% tolerance, but TO-92/SO-8; higher IQ (3–5 mA), lower ripple rejection (30 dB min) | Lower thermal performance (θJA = 200 °C/W in SO-8); less suitable for sustained 100 mA loads | Prefer for cost-sensitive, low-power designs where full 100 mA is rarely used |
| LM78L08ACM/NOPB | +8 V output, ±5% tolerance, SO-8; wider input range (11–35 V), but higher dropout (2.5 V min) and IQ (5.5 mA typ) | Higher minimum input voltage increases PSU overhead; less efficient in low-differential applications | Choose when input voltage exceeds 23 V or legacy LM78L compatibility is required |
Compared with MC78L08ACDR2G and LM78L08ACM/NOPB, AP78L08SG-13 offers superior ripple rejection (37–46 dB vs. ≤30 dB), lower dropout (≤2.0 V vs. ≥2.5 V), and optimized SO-8 thermal design (153 °C/W), making it preferred for compact, noise-sensitive 100 mA logic supplies.
Availability
AP78L08SG-13 is available at Aetrix Electronics and suitable for CD-ROM drives, DVD players, set-top boxes, and Hi-Fi audio equipment requiring stable component supply, RoHS compliance, and green packaging.
Supply support for AP78L08SG-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions.
The AP78LXX series targets cost-effective, space-constrained consumer electronics needing robust local regulation-designed for plug-and-play replacement of Zener/resistor networks in logic and analog subsystems.
FAQ
What is the minimum input voltage required for AP78L08SG-13 to maintain regulation?
The AP78L08SG-13 requires a minimum input voltage of 9.7 V to maintain line regulation under all operating conditions, as specified in the Recommended Operating Conditions table. Below this threshold, output voltage drops nonlinearly and regulation is not guaranteed.
Can AP78L08SG-13 be used without output capacitance?
No. A minimum 0.1 µF ceramic capacitor is required at VOUT to ensure stability and suppress high-frequency noise, per Note 4 in the datasheet. Omitting it risks oscillation and degraded transient response, especially under dynamic load changes.
How does the SO-8 package's thermal performance compare to TO-92 for AP78L08SG-13?
The SO-8 package has θJA = 153 °C/W versus TO-92's 176 °C/W under standard test conditions, enabling ~15% higher continuous power dissipation before thermal shutdown. This makes SO-8 preferable for sustained 100 mA loads on typical 2 oz copper PCBs.
Is AP78L08SG-13 compatible with lead-free reflow profiles?
Yes. AP78L08SG-13 is RoHS-compliant and qualified for standard lead-free reflow profiles (J-STD-020), with a maximum peak temperature of 260°C. Its green molding compound contains no bromine or antimony, meeting JEDEC MSL-1 handling requirements.
AP78L08SG-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 23V
- Voltage - Output (Min/Fixed):
- 8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 5.5 mA
- Current - Supply (Max):
- -
- PSRR:
- 46dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -20°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
AP78L08SG-13 FAQ
1.How can I place an order for AP78L08SG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP78L08SG-13 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 AP78L08SG-13 reliable?
The price and inventory of AP78L08SG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP78L08SG-13 is usually 5 days.
3.What payment methods are accepted for AP78L08SG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP78L08SG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP78L08SG-13?
AP78L08SG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP78L08SG-13 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 AP78L08SG-13?
For technical support, including AP78L08SG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP78L08SG-13 requirements.
6.How does Aetrix verify that AP78L08SG-13 is sourced from the original manufacturer or authorized distributors?
All AP78L08SG-13 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 AP78L08SG-13 meets industry standards.
7.What is the process for return or replacement of AP78L08SG-13?
All AP78L08SG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP78L08SG-13, 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 AP78L08SG-13 part is unused and in its original packaging.
Return procedure for AP78L08SG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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