LM7809 9V Linear Voltage Regulator 1.5A IC 7809
LM7809 9V Linear Voltage Regulator 1.5A IC 7809
LM7809 9V Linear Voltage Regulator 1.5A IC 7809
The LM7809 is a robust 3-terminal positive voltage regulator IC that delivers a stable 9V DC output with up to 1.5A of current. Featuring built-in thermal overload protection, short-circuit current limiting, and safe operating area protection, this TO-220 package regulator is an industry-standard solution for powering 9V circuits from higher unregulated DC sources. Available now from The Tech Depot, Bengaluru - trusted by makers and professionals across India. Fast shipping, 7-day warranty on manufacturing defects, and expert technical support included.
Key Features
- Fixed 9V Output: Provides a precisely regulated 9V DC output voltage
- 1.5A Output Current: Capable of delivering up to 1.5A continuous load current
- Built-In Protections: Thermal overload, short-circuit current limiting, and safe operating area (SOA) protection
- Wide Input Range: Accepts input voltage from 11V to 35V DC
- TO-220 Package: Industry-standard 3-pin through-hole package with heatsink tab for easy thermal management
- Low Output Noise: Clean, stable DC output ideal for analog and sensitive circuits
- Drop-In Replacement: Pin-compatible with UA7809, MC7809, KA7809, and other 78xx family equivalents
Specifications
| Part Number | LM7809 / IC 7809 |
| Regulator Type | Positive Linear Voltage Regulator |
| Output Voltage | 9V DC (Fixed) |
| Output Current (Max) | 1.5A |
| Input Voltage Range | 11V to 35V DC |
| Dropout Voltage | ~2V (minimum input 11V for 9V output) |
| Output Voltage Tolerance | +/-4% (typical) |
| Line Regulation | 4mV to 100mV (typical) |
| Load Regulation | 9mV to 100mV (typical) |
| Quiescent Current | ~5mA (typical) |
| Ripple Rejection | 62dB (typical) |
| Package | TO-220 (3-Pin Through-Hole) |
| Pin Configuration | Pin 1: Input | Pin 2: GND | Pin 3: Output |
| Operating Temperature | 0 degreesC to +125 degreesC (junction) |
| Thermal Protection | Yes - Internal Thermal Overload Shutdown |
| Short-Circuit Protection | Yes - Internal Current Limiting |
| Mounting | Through-hole; heatsink mountable via TO-220 tab |
| Origin | Original / Authentic IC |
| Warranty | 7-day warranty on manufacturing defects |
| Support | Email & WhatsApp 24/7 |
Pin Configuration (TO-220)
| Pin Number | Pin Name | Description |
| 1 | INPUT | Unregulated DC input voltage (11V-35V) |
| 2 | GND | Ground / Common reference |
| 3 | OUTPUT | Regulated 9V DC output |
How to Use the LM7809
- Basic Wiring: Connect unregulated DC (11V-35V) to Pin 1 (INPUT), ground to Pin 2 (GND), and take regulated 9V from Pin 3 (OUTPUT).
- Input Capacitor: Place a 0.33uF ceramic or electrolytic capacitor between the INPUT pin and GND, close to the IC, to prevent oscillation - especially if the power source is far from the regulator.
- Output Capacitor: Place a 0.1uF ceramic capacitor between the OUTPUT pin and GND to improve transient response and output stability.
- Heatsink Requirement: At higher input voltages or load currents, the IC dissipates significant heat. Calculate power dissipation as P = (Vin 9V) x Iload. Use an appropriate TO-220 heatsink when dissipation exceeds 1W.
- Minimum Load: The LM7809 requires a minimum load current of approximately 5mA for proper regulation.
- Protection Diodes: For applications with large output capacitors, add a reverse-biased diode from output to input to protect the IC during power-off discharge.
Why Choose The L
Frequently Asked Questions
When will I receive my order?
Products ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.
Is technical support available?
Yes, 24/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.
What is your return policy?
7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Buy LM7809 9V Linear Voltage Regulator 1.5A IC 7809 Online in India
Purchase the LM7809 9V Linear Voltage Regulator 1.5A IC 7809 online at The Tech Depot - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on LM7809 9V Linear Voltage Regulator 1.5A IC 7809 with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.
Looking to buy LM7809 9V Linear Voltage Regulator 1.5A IC 7809 at the best price in India? The Tech Depot offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.