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LM236AH-5.0/NOPB
Texas Instruments
IC VREF SHUNT 1% TO46-3
52674 Pcs New Original In Stock
Shunt Voltage Reference IC Fixed 5V V ±1% 10 mA TO-46-3
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5.0 / 5.0
- (91 Ratings)
LM236AH-5.0/NOPB
Product Overview
1302321
DiGi Electronics Part Number
LM236AH-5.0/NOPB-DGManufacturer
Texas Instruments
LM236AH-5.0/NOPB
Description
IC VREF SHUNT 1% TO46-3Inventory
52674 Pcs New Original In Stock
Shunt Voltage Reference IC Fixed 5V V ±1% 10 mA TO-46-3
Quantity
Minimum 1
Minimum 1
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LM236AH-5.0/NOPB Technical Specifications
Category
Power Management (PMIC), Voltage Reference
Packaging
Bulk
Series
-
Product Status
Active
Reference Type
Shunt
Output Type
Fixed
Voltage - Output (Min/Fixed)
5V
Current - Output
10 mA
Tolerance
±1%
Temperature Coefficient
-
Noise - 0.1Hz to 10Hz
-
Noise - 10Hz to 10kHz
-
Voltage - Input
-
Current - Supply
-
Current - Cathode
600 µA
Operating Temperature
-25°C ~ 85°C (TA)
Mounting Type
Through Hole
Package / Case
TO-206AB, TO-46-3 Metal Can
Supplier Device Package
TO-46-3
Base Product Number
LM236
Datasheet & Documents
HTML Datasheet
LM236AH-5.0/NOPB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
*LM236AH-5.0/NOPB
LM236AH50NOPB
Standard Package
1,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Leurs délais de livraison optimisent mon planning et améliorent mon efficacité.
de desembre 02, 2025
Une expérience d’achat plaisante avec des produits de qualité à des prix très abordables.
de desembre 02, 2025
They deliver fantastic value through their pricing and support services.
de desembre 02, 2025
I appreciate how upfront and honest they are about their prices.
de desembre 02, 2025
The online chat feature is a real plus, providing instant support whenever needed.
de desembre 02, 2025
Their sturdy packaging prevents damages and hassles upon receipt.
de desembre 02, 2025
I highly recommend DiGi Electronics for their price advantage and reliable after-sales service.
de desembre 02, 2025
Their after-sales support is responsive and professional. It’s clear they value their customers and aim to resolve issues swiftly.
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Frequently Asked Questions (FAQ)
When designing a precision 5V shunt regulator with the LM236AH-5.0/NOPB, what is the critical relationship between the cathode current and the load current, and how do I calculate the correct external series resistor to avoid stability issues?
The LM236AH-5.0/NOPB requires a minimum cathode current (Ika) of 600 µA to maintain regulation, but the maximum output current is 10 mA. The key design constraint is ensuring that the total current through the resistor (I_R) always falls between these limits under all load conditions. Calculate the resistor as R = (V_supply_min - 5V) / (I_load_max + Ika_min). For reliability, include margin: set Ika to 1-2 mA at no load to prevent the device from dropping out of regulation during transient dips. Remember that increasing Ika improves dynamic impedance but increases power dissipation. Do not rely on the absolute maximum of 10 mA for continuous operation in high-temperature environments above 85°C without derating.
Can I directly replace an obsolete LM336-5.0 or a TL431 configured for 5V with the LM236AH-5.0/NOPB in an existing through-hole design, and what are the subtle circuit differences that might cause malfunction?
While the LM236AH-5.0/NOPB (TO-46-3) is a pin-compatible substitute for the LM336-5.0 in terms of form factor, they are not drop-in replacements without analysis. The LM236 is a true shunt reference, whereas the TL431 is an adjustable shunt regulator with different internal compensation. When replacing a TL431 circuit, remove the external feedback divider network entirely, as the LM236AH-5.0/NOPB is a fixed 5V device. The critical difference is the minimum cathode current: TL431 typically needs 1 mA, but LM236 requires only 600 µA. If your existing circuit used a resistor sized for 10 mA to bias the TL431, the LM236 will experience excessive current (up to 10 mA), potentially causing thermal drift and long-term reliability issues. Recalculate the series resistor based on the LM236's 600 µA minimum to 10 mA maximum range to ensure proper operation.
For a precision data acquisition system operating in a -25°C to 85°C environment, what are the long-term reliability risks of soldering the LM236AH-5.0/NOPB TO-46 metal can package, and what thermal management techniques should I implement?
The LM236AH-5.0/NOPB uses a TO-46 metal can package, which is mechanically robust but sensitive to thermal gradients during soldering. Although it has an MSL rating of 1 (unlimited floor life), the primary reliability risk is thermal stress from the manual soldering process. Avoid exceeding a 300°C soldering iron temperature for more than 5 seconds per lead. For long-term stability, the metal can acts as a heat sink but also picks up ambient temperature. In high-density designs, ensure adequate airflow around the can to prevent self-heating from the cathode current. A common design mistake is mounting the device flush against a PCB with no clearance; instead, allow 1-2 mm of lead length to decouple mechanical stress and improve convection. If operating near 85°C, derate the maximum output current from 10 mA to 7-8 mA to maintain the ±1% tolerance over the full temperature range, as the datasheet parameters are guaranteed at 25°C.
When using the LM236AH-5.0/NOPB as a shunt reference in an automotive or industrial sensor interface, what specific transient protection considerations are required to prevent latch-up or destruction from over-voltage events?
Since the LM236AH-5.0/NOPB is a shunt regulator, it is inherently vulnerable to over-voltage if the supply voltage rises faster than the series resistor can limit current. In automotive or industrial environments with unregulated 12V or 24V rails, a voltage surge (e.g., load dump) can force the cathode current beyond the absolute maximum of 10 mA, leading to thermal runaway and die failure. Your protection strategy must include a series resistor sized for maximum anticipated input voltage, not nominal voltage. For a 24V nominal system with potential spikes to 36V, use a resistor that limits current to ≤10 mA at 36V while maintaining regulation at the minimum supply. Additionally, place a transient voltage suppressor (TVS) diode (e.g., 5.6V to 6V) directly across the LM236AH-5.0/NOPB to clamp incoming surges before they exceed the device's 10 mA output rating. Do not rely solely on bulk capacitance, as it does not prevent over-current in fast transients.
How does the LM236AH-5.0/NOPB’s 1% initial tolerance and dynamic impedance affect ADC reference performance in a 12-bit or 16-bit system, and what layout techniques are critical to avoid noise injection?
For a 12-bit system with a 5V reference, the 1% tolerance of the LM236AH-5.0/NOPB introduces up to ±50 mV error, which is acceptable after system calibration. However, for 16-bit systems (152 µV per LSB), you must consider its dynamic impedance (typically 0.6 Ω to 1 Ω) in combination with load transients from the ADC. If the reference sees varying load currents, the dynamic impedance causes voltage fluctuations that translate directly into gain errors and noise. To mitigate this, star-ground the TO-46 can's case (which is the cathode connection) directly to the analog ground plane with minimal trace inductance. Place a 0.1 µF ceramic capacitor as close as possible to the reference pins (anode to cathode) to decouple high-frequency noise from the ADC sampling clock. Do not use the same series resistor to power other digital components; the reference must have a dedicated bias path to prevent digital switching noise from modulating the cathode current and injecting error into the reference voltage.
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LM236AH-5.0/NOPB CAD Models
Texas Instruments LM236AH-5.0/NOPB PCB symbols & footprints
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