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DZ23C15HE3-TP
Electronics Part Number
DZ23C15HE3-TP-WXManufacturer
Texas Instruments
DZ23C15HE3-TP
Description
SOT-23 zener diode, 300mW ratingInventory
409 Pcs New Original In Stock
Zener diode array, pair common cathode, 15V, 300mW, ±5%, SOT-23. Provides stable reference and supply clamping in space-saving package.
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Basic cost: USD 70.00
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Technical Specifications
Category
Power Management (PMIC), Voltage Regulators - DC DC Switching Regulators
Manufacturer
Texas Instruments
Packaging
Tube
Operating Temperature
-40°C ~ 125°C (TJ)
Mounting Type
Through Hole
Package / Case
TO-220-5 Formed Leads
Series
-
Base Product Number
TL2575
Product Status
Active
Output Type
Fixed
Number of Outputs
1
Voltage - Input (Min)
4.75V
Voltage - Input (Max)
60V
Topology
Buck
Function
Step-Down
Supplier Device Package
TO-220-5
Voltage - Output (Max)
-
Current - Output
1A
Output Configuration
Positive
Frequency - Switching
52kHz
Voltage - Output (Min/Fixed)
5V
Synchronous Rectifier
No
Data Sheet Document (D)
Datasheets
Download TL2575HV-05IKV Product Specification (PDF)
HTML Datasheet
TL2575HV-05IKV-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
Not Applicable
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
TEXTISTL2575HV-05IKV -296-21834-5 2156-TL2575HV-05IKV -296-21834-5-DG 296-21834-5 -TL2575HV-05IKV-NDR
Standard Package
50
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Frequently Asked Questions (FAQ)
Can the TL2575HV-05IKV replace a linear regulator like the LM7805 in a high-input-voltage, low-noise
The TL2575HV-05IKV can replace the LM7805 in high-input-voltage scenarios (e.g., 24V or 48V to 5V) where thermal dissipation is a concern, but it is not suitable for low-noise applications without additional filtering. Unlike the LM7805, the TL2575HV-05IKV is a switching regulator operating at 52 kHz, which generates conducted and radiated EMI. For noise-sensitive systems (e.g., analog sensors or RF circuits), you must add input and output LC filters, proper grounding, and shielding. If ultra-low noise is critical, consider a post-regulator LDO after the TL2575HV-05IKV or stick with a linear regulator and manage heat via a heatsink.
What are the key thermal and layout considerations when designing a PCB for the TL2575HV-05IKV in a
When using the TL2575HV-05IKV in a 48V-to-5V, 1A design, thermal management is critical due to high power dissipation (up to ~43W input, ~5W output, ~38W lost as heat). You must use a TO-220-5 package with a substantial heatsink and ensure adequate airflow. PCB layout should minimize loop areas in the switch node (pin 2 to inductor to diode), place the input capacitor (100µF low-ESR) within 1 cm of the IC, and use a ground plane with thermal vias under the tab. Poor layout increases EMI and can cause instability or premature thermal shutdown.
Is the TL2575HV-05IKV a drop-in replacement for the MC34063 in a 12V to 5V buck converter, and what
The TL2575HV-05IKV is not a direct drop-in replacement for the MC34063 due to differences in control architecture, switching frequency, and external component requirements. While both are buck regulators, the MC34063 uses a variable off-time control and requires an external switch transistor, whereas the TL2575HV-05IKV integrates the switch and runs at a fixed 52 kHz. To replace an MC34063 design, you must redesign the feedback network (not needed here—fixed 5V output), select a compatible inductor (typically 100–220 µH for TL2575HV-05IKV), and ensure the input voltage does not exceed 60V. Also, verify startup behavior under load, as the TL2575HV-05IKV has better current limiting and thermal protection.
How does the TL2575HV-05IKV perform under short-circuit conditions, and what protection mechanisms s
The TL2575HV-05IKV includes built-in current limiting and thermal shutdown, but it is not fully short-circuit protected under all conditions. Prolonged output shorts can cause overheating and eventual failure, especially at high input voltages. To mitigate risk, add an input fuse (e.g., 2A fast-blow) and consider a foldback current limit circuit or a supervisory IC to disable the input supply during fault conditions. Also, ensure the inductor does not saturate under fault currents, as this can increase stress on the internal switch. For mission-critical applications, monitor junction temperature using the thermal shutdown feature and design for derating above 85°C ambient.
Can the TL2575HV-05IKV be used in automotive 12V systems with load dump transients up to 40V, and wh
Yes, the TL2575HV-05IKV can be used in 12V automotive systems, but standard load dump transients (up to 40V per ISO 7637-2) are within its 60V maximum input rating. However, extreme load dump events can exceed 60V (e.g., 87V for 400ms), so additional protection is essential. Use a TVS diode (e.g., SMAJ58A) rated for 58V clamping voltage and 400W peak pulse power, placed close to the input connector. Add a series input fuse and a bulk capacitor (≥470µF, 63V) to handle transient energy. Also, include a reverse-polarity protection diode or MOSFET to prevent damage from battery reversal. Without these, repeated transients can degrade or destroy the TL2575HV-05IKV over time.
Can the TL2575HV-05IKV replace a linear regulator like the LM7805 in a high-input-voltage, low-noise
The TL2575HV-05IKV can replace the LM7805 in high-input-voltage scenarios (e.g., 24V or 48V to 5V) where thermal dissipation is a concern, but it is not suitable for low-noise applications without additional filtering. Unlike the LM7805, the TL2575HV-05IKV is a switching regulator operating at 52 kHz, which generates conducted and radiated EMI. For noise-sensitive systems (e.g., analog sensors or RF circuits), you must add input and output LC filters, proper grounding, and shielding. If ultra-low noise is critical, consider a post-regulator LDO after the TL2575HV-05IKV or stick with a linear regulator and manage heat via a heatsink.
What are the key thermal and layout considerations when designing a PCB for the TL2575HV-05IKV in a
When using the TL2575HV-05IKV in a 48V-to-5V, 1A design, thermal management is critical due to high power dissipation (up to ~43W input, ~5W output, ~38W lost as heat). You must use a TO-220-5 package with a substantial heatsink and ensure adequate airflow. PCB layout should minimize loop areas in the switch node (pin 2 to inductor to diode), place the input capacitor (100µF low-ESR) within 1 cm of the IC, and use a ground plane with thermal vias under the tab. Poor layout increases EMI and can cause instability or premature thermal shutdown.
Is the TL2575HV-05IKV a drop-in replacement for the MC34063 in a 12V to 5V buck converter, and what
The TL2575HV-05IKV is not a direct drop-in replacement for the MC34063 due to differences in control architecture, switching frequency, and external component requirements. While both are buck regulators, the MC34063 uses a variable off-time control and requires an external switch transistor, whereas the TL2575HV-05IKV integrates the switch and runs at a fixed 52 kHz. To replace an MC34063 design, you must redesign the feedback network (not needed here—fixed 5V output), select a compatible inductor (typically 100–220 µH for TL2575HV-05IKV), and ensure the input voltage does not exceed 60V. Also, verify startup behavior under load, as the TL2575HV-05IKV has better current limiting and thermal protection.
How does the TL2575HV-05IKV perform under short-circuit conditions, and what protection mechanisms s
The TL2575HV-05IKV includes built-in current limiting and thermal shutdown, but it is not fully short-circuit protected under all conditions. Prolonged output shorts can cause overheating and eventual failure, especially at high input voltages. To mitigate risk, add an input fuse (e.g., 2A fast-blow) and consider a foldback current limit circuit or a supervisory IC to disable the input supply during fault conditions. Also, ensure the inductor does not saturate under fault currents, as this can increase stress on the internal switch. For mission-critical applications, monitor junction temperature using the thermal shutdown feature and design for derating above 85°C ambient.
Can the TL2575HV-05IKV be used in automotive 12V systems with load dump transients up to 40V, and wh
Yes, the TL2575HV-05IKV can be used in 12V automotive systems, but standard load dump transients (up to 40V per ISO 7637-2) are within its 60V maximum input rating. However, extreme load dump events can exceed 60V (e.g., 87V for 400ms), so additional protection is essential. Use a TVS diode (e.g., SMAJ58A) rated for 58V clamping voltage and 400W peak pulse power, placed close to the input connector. Add a series input fuse and a bulk capacitor (≥470µF, 63V) to handle transient energy. Also, include a reverse-polarity protection diode or MOSFET to prevent damage from battery reversal. Without these, repeated transients can degrade or destroy the TL2575HV-05IKV over time.
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Sep 15 2026
