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onsemi KA7815AE
- Part No.:
- KA7815AE
- Manufacturer:
- onsemi
- Package:
- TO-220-3
- Datasheet:
-
KA7815AE.pdf
- Description:
- IC REG LINEAR 15V 1A TO220-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,799
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Product details
Overview
KA7815AE from ON Semiconductor is a fixed-output +15 V, 1 A positive linear voltage regulator in TO-220 package with ±2% output voltage tolerance at 25°C, thermal overload protection, short-circuit protection, and safe operating area (SOA) protection. It delivers stable DC power for industrial control logic supplies and analog sensor biasing where input-to-output differential up to 15 V is acceptable.
For engineers reviewing the KA7815AE datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage (2 V at 1 A), load regulation (≤12 mV over 5 mA–1 A), ripple rejection (58 dB at 120 Hz), quiescent current (5.2–6.0 mA), and operating temperature range (0°C to +125°C).
Technical Context
The KA7815AE implements a classic three-terminal series pass architecture with internal error amplifier, bandgap reference, and current-limited series pass transistor. Protection circuitry includes thermal shutdown triggered by junction temperature exceeding ~175°C and foldback current limiting during output short-circuit events.
It operates without external components for basic regulation but requires input (CI = 0.33 μF) and output (CO = 0.1 μF) ceramic capacitors per datasheet test circuit. The device is not adjustable - output voltage is factory-trimmed and fixed at +15 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +15.0 V ±2% at 25°C; maintains regulation across 5 mA–1 A load and 17.5–30 V input. |
| Max Output Current | 1 A continuous; peak current capability of 2.2 A for transient loads. |
| Dropout Voltage | 2 V at 1 A and 25°C; minimum required input is 17 V for stable 15 V output. |
| Ripple Rejection | 58 dB at 120 Hz with 500 mA load; suppresses AC ripple from rectified mains-derived supplies. |
| Load Regulation | ≤12 mV from 5 mA to 1 A; ensures <0.08% output shift under full load variation. |
| Quiescent Current | 5.2–6.0 mA at 25°C; enables low-noise operation without excessive standby power loss. |
| Thermal Protection | Internal thermal shutdown activates above ~175°C junction temperature; auto-recovers after cooldown. |
Pinout & Package
KA7815AE is supplied in TO-220 (Dual Gauge) package with standard 3-pin configuration: Pin 1 = Input, Pin 2 = Ground, Pin 3 = Output. The metal tab is electrically connected to Pin 2 (GND) and serves as thermal path to heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Input) | Unregulated DC supply input | Accepts 17.5–30 V DC; must be decoupled with 0.33 μF capacitor close to pin. |
| 2 (GND) | Reference and return node | Common ground for input/output circuits; metal tab is tied to this pin for thermal conduction. |
| 3 (Output) | Regulated +15 V output | Delivers up to 1 A; requires 0.1 μF ceramic capacitor directly at pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +15 V output | Factory-trimmed precision eliminates need for external feedback resistors or trimming. |
| Thermal overload protection | Automatic shutdown prevents damage during sustained overload or inadequate heatsinking. |
| Short-circuit current limit | Foldback limiting reduces power dissipation during output shorts, enhancing reliability. |
| Safe Operating Area (SOA) protection | Prevents secondary breakdown of internal pass transistor under high-voltage/high-current stress. |
| Low output noise | 90 μV RMS (10 Hz–100 kHz) supports noise-sensitive analog circuitry like ADC references. |
Applications
| Industrial PLC I/O Power | Analog Sensor Bias Supply |
|---|---|
Use Scenario: Powers digital input conditioning circuits and isolated relay drivers in programmable logic controllers. IC Role / Device Role / Timing Role: Provides clean, regulated +15 V rail for optocoupler LED drivers and level-shifting logic. Use Value: Maintains stable logic thresholds across wide ambient temperature (0–125°C) and load transients. | Use Scenario: Supplies excitation voltage to precision 4–20 mA current-loop sensors and bridge-based strain gauges. IC Role / Device Role / Timing Role: Delivers low-noise, tightly regulated +15 V for sensor excitation and op-amp biasing. Use Value: 90 μV output noise and ≤12 mV load regulation preserve measurement accuracy in 16-bit systems. |
| Legacy Equipment Replacement | DC Motor Control Logic |
Use Scenario: Direct replacement for obsolete 7815 regulators in field-deployed instrumentation and telecom line cards. IC Role / Device Role / Timing Role: Drop-in compatible +15 V source meeting legacy footprint and electrical specs. Use Value: ±2% tolerance and TO-220 pinout ensure mechanical and functional interchangeability. | Use Scenario: Powers gate driver ICs and microcontroller peripherals in brushed DC motor control modules. IC Role / Device Role / Timing Role: Supplies auxiliary +15 V for H-bridge logic and current-sense amplifiers. Use Value: Thermal shutdown protects against stall-induced overheating during motor jam conditions. |
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 |
|---|---|---|---|
| LM7815CDT/NOPB | ±4% output tolerance (vs. ±2%), higher quiescent current (7–10 mA), same TO-220 package and pinout. | Suitable for cost-sensitive non-precision applications; lower accuracy limits use in high-resolution analog systems. | Select when ±4% output tolerance is acceptable and TI's long-term availability is preferred. |
| MC7815BDTG | ±4% tolerance, higher dropout (2.5 V), wider operating temperature (−40°C to +125°C), same TO-220 package. | Better cold-temperature performance; less suitable for high-ambient industrial enclosures where KA7815AE's 0–125°C range suffices. | Choose for extended temperature range needs or where ON Semi's Fairchild heritage compatibility is critical. |
Compared with LM7815CDT/NOPB and MC7815BDTG, KA7815AE offers tighter ±2% output tolerance and lower quiescent current (5.2–6.0 mA), making it preferable for precision analog biasing and thermally constrained designs - though its 0°C minimum operating temperature excludes sub-zero environments.
Availability
KA7815AE is available at Aetrix Electronics and suitable for industrial control systems, analog sensor interfaces, and legacy equipment replacement requiring stable component supply and long-term manufacturability.
Supply support for KA7815AE 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
ON Semiconductor (formerly Fairchild Semiconductor) is a global semiconductor manufacturer specializing in power management, analog, and discrete devices for automotive, industrial, and cloud infrastructure markets.
The KA78XXAE series was designed as a drop-in upgrade to legacy 78xx regulators, offering tighter output tolerance (±2%), improved thermal robustness, and consistent SOA protection for industrial power supply designs.
FAQ
What is the maximum input voltage rating for KA7815AE?
The absolute maximum input voltage for KA7815AE is 35 V when the output voltage is +15 V. However, the recommended operating input range is 17.5 V to 30 V to maintain regulation and stay within safe power dissipation limits. Exceeding 30 V increases thermal stress and risks triggering thermal shutdown under full load.
Does KA7815AE require external capacitors to operate stably?
Yes, KA7815AE requires a 0.33 μF ceramic capacitor on the input pin and a 0.1 μF ceramic capacitor on the output pin, placed as close as possible to the device terminals. These capacitors prevent oscillation and improve transient response - omitting them may cause instability or excessive output noise.
Can KA7815AE be used in adjustable voltage configurations?
No, KA7815AE is a fixed-output regulator with no adjustment terminal. Its +15 V output is internally trimmed and cannot be modified with external resistors. For adjustable output, consider ON Semiconductor's NCV7805ADT or LM317-based solutions instead of KA7815AE.
What is the thermal resistance junction-to-case for KA7815AE in TO-220 package?
The thermal resistance junction-to-case (RθJC) for KA7815AE in TO-220 package is 5°C/W. This value assumes proper mounting to an adequately sized heatsink using thermal compound; actual junction temperature depends on total thermal path including heatsink and ambient conditions.
Is KA7815AE RoHS compliant and lead-free?
Yes, KA7815AE is RoHS compliant and lead-free per ON Semiconductor's product change notices. The device meets EU Directive 2011/65/EU and is manufactured with Pb-free terminations and halogen-free molding compounds, supporting environmentally compliant industrial assembly.
KA7815AE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 35V
- Voltage - Output (Min/Fixed):
- 15V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2V @ 1A (Typ)
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 6 mA
- Current - Supply (Max):
- -
- PSRR:
- 58dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
KA7815AE FAQ
1.How can I place an order for KA7815AE through Aetrix?
Please submit a Request for Quotation (RFQ) for KA7815AE 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 KA7815AE reliable?
The price and inventory of KA7815AE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KA7815AE is usually 5 days.
3.What payment methods are accepted for KA7815AE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KA7815AE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KA7815AE?
KA7815AE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KA7815AE 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 KA7815AE?
For technical support, including KA7815AE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KA7815AE requirements.
6.How does Aetrix verify that KA7815AE is sourced from the original manufacturer or authorized distributors?
All KA7815AE 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 KA7815AE meets industry standards.
7.What is the process for return or replacement of KA7815AE?
All KA7815AE units undergo pre-shipment inspection (PSI). If there is an issue with KA7815AE, 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 KA7815AE part is unused and in its original packaging.
Return procedure for KA7815AE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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