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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

onsemi TN5D61A-HB11-E

Name: TN5D61A-HB11-E
Brand: onsemi
SKU: TN5D61A-HB11-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TN5D61A-HB11-E

Manufacturer:: onsemi

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: TO-220-5 Full Pack, Formed Leads

Datasheet:: TN5D61A-HB11-E.pdf

Description:: IC REG BUCK 24V 5A TO220F5I5H-HB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TN5D61A-HB11-E from SANYO Semiconductor is a vertically integrated P-channel power MOSFET-based step-down switching regulator IC delivering 24 V output at up to 5 A, featuring built-in over-current, under-voltage, and over-temperature protection with self-recovery behavior, plus soft-start and standby-mode control via the SS pin. It operates from 30–48 V input and achieves 94% efficiency at 40 V/3 A.

For engineers reviewing the TN5D61A-HB11-E datasheet, pinout, applications, or equivalent options, this page delivers verified functional identity, validated thermal and protection thresholds, confirmed TO-220FI5H-HB package mapping, real-world load/line regulation specs, and two field-validated alternative regulators for 24 V industrial DC-DC designs.

Technical Context

The TN5D61A-HB11-E integrates a vertical P-ch MOSFET (R_DS(on) = 100 mΩ, V_DSS = −60 V) and PWM controller in a single TO-220FI5H-HB package. Its internal oscillator runs at 120–180 kHz with max duty cycle of 96%, enabling fixed-frequency synchronous buck operation without external timing components.

Protection functions are fully autonomous: under-voltage lockout triggers at 7.2–8.8 V (V_UVLO(on)) with 1.0 V hysteresis; over-current threshold is 5.1–10 A (I_OCP); over-temperature shutdown activates at 165 °C (T_TSD(on)) and recovers at 140 °C. The SS pin supports both soft-start timing (via external capacitor) and logic-level standby control (V_STB(on) = 0.3 V).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	24.0 V ±0.7 V (tight regulation across 0.5–5 A load and 30–48 V input)
Efficiency	94% at 40 V input / 3 A output - enables high-power-density 24 V supplies with minimal heatsink
Switching Frequency	150 kHz typical - balances EMI control and inductor size for 100 μH choke design
R_DS(on)	100 mΩ - limits conduction loss to ≤2.5 W at 5 A, supporting 15 W case dissipation at T_C = 25 °C
Over-Current Threshold	7.5 A typical - provides headroom above 5 A rated output while protecting MOSFET during short-circuit events
Soft-Start Control	Via external capacitor on SS pin - enables controlled output ramp-up to prevent inrush current in motor or capacitive loads
Standby Input Threshold	0.3 V on SS pin - allows direct interface with 3.3 V or 5 V logic for remote ON/OFF control

Pinout & Package

Package: TO-220FI5H-HB - insulated, 5-pin through-hole package with metal tab thermally connected to GND (Pin 2), optimized for PCB heat spreading and mechanical mounting.

Pin/Terminal	Circuit Role	Design Meaning
1: VIN	Power supply input	Accepts 30–48 V DC input; handles transient surge currents up to −36 A (10 μs pulse); requires ≥3000 μF bulk capacitance nearby
2: GND	Ground reference and thermal pad	Common return for all internal circuits and heatsink interface; must be low-impedance copper pour for thermal and noise control
3: SWOUT	Switch node output	Drives external choke (L1) and freewheeling diode (D1); connects directly to source of internal P-MOSFET
4: FB	Output voltage feedback	Resistive divider input referenced to GND; senses V_OUT with ±2.4 mV/°C tempco; absolute max 30 V
5: SS	Soft-start & standby control	Capacitor connection for ramp control (0.01–0.22 μF typical); also accepts logic-low signal (<0.3 V) to disable output

Key Features

Feature	Design Value
Integrated P-ch MOSFET	−60 V V_DSS, 100 mΩ R_DS(on) - eliminates external high-side switch and gate driver complexity
Self-recovering protections	Auto-restart after UVLO, OCP, and OTP events - maintains system uptime without manual reset
Adjustable soft-start	Capacitor-timed output ramp - prevents inrush into large output capacitors or downstream converters
Logic-compatible standby mode	0.3 V threshold on SS pin - enables direct interfacing with microcontroller GPIO or optocoupler outputs
High-efficiency buck topology	94% peak efficiency - reduces thermal load in enclosed industrial enclosures and extends component lifetime

Applications

Industrial PLC Power Supply	24 V DC Motor Driver Bias Supply
Use Scenario: Provides regulated 24 V rail for programmable logic controller I/O modules and communication interfaces in factory automation cabinets. IC Role / Device Role / Timing Role: Primary DC-DC converter supplying stable 24 V to digital logic, analog sensors, and RS-485 transceivers. Use Value: Built-in over-temperature protection prevents latch-up during ambient temperature spikes in unventilated control panels.	Use Scenario: Powers gate drivers and logic circuitry in H-bridge motor controllers for conveyor systems and robotic actuators. IC Role / Device Role / Timing Role: Auxiliary bias supply decoupled from main motor power path; synchronized soft-start avoids torque disturbance during startup. Use Value: Standby mode enables rapid shutdown of driver logic during emergency stop, reducing system-level fault propagation time.
Telecom Remote Radio Unit (RRU)	Test Equipment Power Module
Use Scenario: Delivers 24 V to RF front-end amplifiers and monitoring circuitry in outdoor base station radios operating from −25 to +85 °C ambient. IC Role / Device Role / Timing Role: Regulated intermediate bus converter upstream of point-of-load regulators for sensitive RF ICs. Use Value: Load regulation of ≤200 mV ensures stable amplifier bias despite dynamic current draw from burst-mode transmission.	Use Scenario: Used in benchtop power analyzers and automated test equipment requiring precise, repeatable 24 V output with fast enable/disable response. IC Role / Device Role / Timing Role: Programmable output stage controlled via external MCU GPIO toggling the SS pin. Use Value: Soft-start capacitor selection allows tuning ramp time from 10 ms to >100 ms - critical for calibration stability during power-on sequencing.

Industrial PLC Power Supply

24 V DC Motor Driver Bias Supply

Use Scenario: Provides regulated 24 V rail for programmable logic controller I/O modules and communication interfaces in factory automation cabinets.

IC Role / Device Role / Timing Role: Primary DC-DC converter supplying stable 24 V to digital logic, analog sensors, and RS-485 transceivers.

Use Value: Built-in over-temperature protection prevents latch-up during ambient temperature spikes in unventilated control panels.

Use Scenario: Powers gate drivers and logic circuitry in H-bridge motor controllers for conveyor systems and robotic actuators.

IC Role / Device Role / Timing Role: Auxiliary bias supply decoupled from main motor power path; synchronized soft-start avoids torque disturbance during startup.

Use Value: Standby mode enables rapid shutdown of driver logic during emergency stop, reducing system-level fault propagation time.

Telecom Remote Radio Unit (RRU)

Test Equipment Power Module

Use Scenario: Delivers 24 V to RF front-end amplifiers and monitoring circuitry in outdoor base station radios operating from −25 to +85 °C ambient.

IC Role / Device Role / Timing Role: Regulated intermediate bus converter upstream of point-of-load regulators for sensitive RF ICs.

Use Value: Load regulation of ≤200 mV ensures stable amplifier bias despite dynamic current draw from burst-mode transmission.

Use Scenario: Used in benchtop power analyzers and automated test equipment requiring precise, repeatable 24 V output with fast enable/disable response.

IC Role / Device Role / Timing Role: Programmable output stage controlled via external MCU GPIO toggling the SS pin.

Use Value: Soft-start capacitor selection allows tuning ramp time from 10 ms to >100 ms - critical for calibration stability during power-on sequencing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TN5D62A-HB11-E	Same package and pinout; higher 7 A OCP threshold; identical 24 V output but wider input range (20–57 V)	Better suited for 24 V systems with brownout risk or variable input (e.g., battery-backed telecom)	Select when input voltage may dip below 30 V or sustained load exceeds 5 A intermittently
MP2451DT-LF-Z	36 V max input; 0.8–28 V adjustable output; external N-MOSFET required; no integrated OCP/OTP	Requires external protection circuitry and feedback resistor network; lower BOM count but higher design effort	Choose for cost-sensitive, non-safety-critical applications where full protection integration is not mandatory

Compared with TN5D61A-HB11-E, TN5D62A-HB11-E offers extended input flexibility and higher current margin, while MP2451DT-LF-Z trades integration for configurability and lower unit cost-making it suitable only where external protection and tuning are acceptable design constraints.

Availability

TN5D61A-HB11-E is available at Aetrix Electronics and suitable for industrial PLC power supplies, 24 V DC motor driver bias supplies, telecom remote radio units, and test equipment power modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TN5D61A-HB11-E 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

SANYO Semiconductor was a Japanese semiconductor manufacturer specializing in power management, analog, and discrete devices before its acquisition by ON Semiconductor in 2011. Known for high-reliability industrial-grade ICs.

The TN5D61A-HB11-E belongs to SANYO's ExPD (Excellent-Performance Power & RF Device) family, designed specifically for robust, self-protected 24 V step-down conversion in harsh industrial environments without external protection components.

FAQ

What is the maximum allowable input voltage for the TN5D61A-HB11-E?

The TN5D61A-HB11-E has an absolute maximum input voltage rating of 57 V on the VIN pin. However, recommended operating input voltage is strictly limited to 30–48 V per datasheet specifications. Operation above 48 V risks exceeding safe operating area limits even if below 57 V, especially under high ambient temperature or heavy load conditions. Always observe the 48 V upper limit in actual designs.

Does the TN5D61A-HB11-E require an external MOSFET?

No, the TN5D61A-HB11-E integrates a vertical P-channel power MOSFET with −60 V V_DSS and 100 mΩ R_DS(on). It is a complete step-down regulator IC - no external high-side switch is needed. Only external passive components (choke, diode, input/output capacitors, and feedback resistors) are required to implement a functional 24 V/5 A supply.

How does the standby mode function on the TN5D61A-HB11-E work?

The TN5D61A-HB11-E enters standby mode when the SS pin voltage is held ≤0.3 V (typical). In this state, switching ceases, output drops to zero, and quiescent current falls to 500 μA. This allows clean, logic-controlled ON/OFF sequencing. The SS pin must remain within 0–7 V absolute maximum; exceeding 7 V risks permanent damage.

What is the purpose of the soft-start capacitor on the TN5D61A-HB11-E SS pin?

The soft-start capacitor connected between the SS pin and GND controls the output voltage ramp rate during power-up. Larger capacitance (e.g., 0.22 μF) yields slower rise times (~100 ms), minimizing inrush current into downstream capacitors or motors. Smaller values (e.g., 0.01 μF) produce faster ramps (~10 ms). The TN5D61A-HB11-E does not regulate the ramp slope - it simply delays internal reference establishment.

Can the TN5D61A-HB11-E be used in automotive applications?

The TN5D61A-HB11-E is specified for −25 to +125 °C junction temperature and −10 to +85 °C recommended operating ambient, but SANYO explicitly states it is intended only for standard applications (industrial, office, AV equipment) - not automotive, medical, aerospace, or safety-critical systems. Its qualification does not meet AEC-Q100, and no automotive-grade screening or failure-in-time data is provided in the datasheet.

TN5D61A-HB11-E Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-5 Full Pack, Formed Leads

Packaging:: Bulk

Product Status:: Obsolete

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Fixed

Number of Outputs:: 1

Voltage - Input (Min):: 30V

Voltage - Input (Max):: 48V

Voltage - Output (Min/Fixed):: 24V

Voltage - Output (Max):: -

Current - Output:: 5A

Frequency - Switching:: 150kHz

Synchronous Rectifier:: No

Operating Temperature:: -10°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220F5I5H-HB

TN5D61A-HB11-E FAQ

1.How can I place an order for TN5D61A-HB11-E through Aetrix?

Please submit a Request for Quotation (RFQ) for TN5D61A-HB11-E 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 TN5D61A-HB11-E reliable?

The price and inventory of TN5D61A-HB11-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TN5D61A-HB11-E is usually 5 days.

3.What payment methods are accepted for TN5D61A-HB11-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TN5D61A-HB11-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TN5D61A-HB11-E?

TN5D61A-HB11-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TN5D61A-HB11-E 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 TN5D61A-HB11-E?

For technical support, including TN5D61A-HB11-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TN5D61A-HB11-E requirements.

6.How does Aetrix verify that TN5D61A-HB11-E is sourced from the original manufacturer or authorized distributors?

All TN5D61A-HB11-E 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 TN5D61A-HB11-E meets industry standards.

7.What is the process for return or replacement of TN5D61A-HB11-E?

All TN5D61A-HB11-E units undergo pre-shipment inspection (PSI). If there is an issue with TN5D61A-HB11-E, 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 TN5D61A-HB11-E part is unused and in its original packaging.

Return procedure for TN5D61A-HB11-E:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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