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Texas Instruments TPS50601HKH/EM
- Part No.:
- TPS50601HKH/EM
- Manufacturer:
- Texas Instruments
- Package:
- 20-CDFF
- Datasheet:
-
TPS50601HKH/EM.pdf
- Description:
- IC REG BUCK ADJ 6A 20CFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS50601HKH/EM from Texas Instruments is a radiation-hardened, 6-A synchronous buck converter with integrated 55-mΩ/50-mΩ MOSFETs, operating from 1.6–6.3 V on PVIN and 3–6.3 V on VIN. It delivers up to 6 A output current, achieves 95% peak efficiency at 3.3 V output, and supports adjustable switching frequency from 100 kHz to 1 MHz. Designed for space satellite point-of-load supplies powering FPGAs, microcontrollers, and ASICs under extreme radiation environments.
For engineers reviewing the TPS50601HKH/EM datasheet, TPS50601HKH/EM pinout, TPS50601HKH/EM application, or TPS50601HKH/EM equivalent, key selection considerations include radiation hardness assurance (RHA) up to 100 krad(Si), SEL immunity to 85 MeV·cm²/mg, monotonic startup into prebiased outputs, split power rail architecture (VIN/PVIN), and thermal shutdown with 10°C hysteresis.
Technical Context
The TPS50601HKH/EM implements constant-frequency peak current mode control with slope compensation, enabling stable transient response and simplified loop compensation. Its dual-input architecture separates control supply (VIN: 3–6.3 V) from power switch supply (PVIN: 1.6–6.3 V), allowing low-input-voltage operation while maintaining robust gate drive.
Protection features include cycle-by-cycle high-side current limiting (8–11 A typ), bidirectional low-side current limiting (7–10 A sourcing, 3 A sinking), BOOT-PH UVLO (2.2–3 V), and thermal shutdown at 175°C with 10°C hysteresis. The SS/TR pin enables monotonic start-up and tracking via external capacitor, while PWRGD provides open-drain fault signaling for undervoltage (91% Vref) and overvoltage (109% Vref).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 6 A continuous - supports high-density FPGA core rail loads without external current sharing. |
| Input Voltage Range | PVIN: 1.6–6.3 V; VIN: 3–6.3 V - enables flexible power sequencing and low-VIN biasing for control circuitry. |
| Switching Frequency | 100 kHz–1 MHz adjustable - allows optimization of inductor size vs. efficiency across wide load range. |
| Voltage Reference | 0.795 V ±1.258% at 25°C - sets minimum output voltage and defines feedback accuracy for precision regulation. |
| Efficiency | 95% peak at Vo = 3.3 V - reduces thermal load in sealed space-grade enclosures with limited cooling. |
| Radiation Hardness | TID 100 krad(Si), SEL immune to 85 MeV·cm²/mg - qualified for long-duration satellite payload operation. |
| Thermal Resistance | RθJC(bot) = 0.514 °C/W - enables high-power dissipation through bottom thermal pad to PCB ground plane. |
Pinout & Package
TPS50601HKH/EM is housed in a 20-pin ceramic flatpack (CFP) package, 7.38 × 12.70 mm nominal body size, with exposed thermal pad on bottom side electrically connected to PGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 21, 31–34) | Analog ground reference & thermal pad connection | Multiple GND pins provide low-impedance return path and enhance thermal conduction to PCB. |
| EN | Enable input with internal pullup | Float to enable; use external resistor divider to set custom UVLO threshold (1.05–1.18 V). |
| RT | Frequency setting resistor node | Connect resistor to GND to program internal oscillator (100 kHz–1 MHz); open = ~500 kHz. |
| SYNC | External clock input/output | Accepts 100 kHz–1 MHz sync signal; configurable as 500-kHz master clock output for multi-rail synchronization. |
| VIN | Control circuit power supply | Supplies bias to internal logic, error amplifier, and gate drivers; must be ≥3 V for operation. |
| PVIN | Power switch supply input | Feeds high-/low-side MOSFETs; can operate down to 1.6 V, enabling ultra-low input applications. |
| PGND (Pins 9–15) | Power ground return | Dedicated low-inductance return for power stage; must be tied to thermal pad externally. |
| PH (Pins 16–21, 22–25) | Switch node | High-current connection to inductor; multiple parallel pins reduce resistance and EMI. |
| BOOT | High-side gate driver bootstrap | Requires external capacitor to PH; monitored by BOOT-PH UVLO (2.2 V) to prevent shoot-through. |
| VSENSE | Inverting input of error amplifier | Feedback node for output voltage regulation; compares against 0.795-V reference or SS/TR voltage. |
| COMP | Error amplifier output | Connect Type II/III compensation network here; transconductance = 1300 µS, DC gain = 39,000 V/V. |
| SS/TR | Slow-start/tracking control | External capacitor sets soft-start ramp; voltage override enables precise power sequencing with other rails. |
| PWRGD | Open-drain power-good flag | Asserts low during startup, UV/OV fault, thermal shutdown, or EN disable; requires external pullup. |
Key Features
| Feature | Design Value |
|---|---|
| Radiation-hardened design | Qualified to 100 krad(Si) TID, ELDRS-free, SEL immune to 85 MeV·cm²/mg - meets MIL-PRF-38535 Class V requirements for space flight. |
| Split power rail architecture | Independent VIN (3–6.3 V) and PVIN (1.6–6.3 V) inputs - decouples control logic supply from noisy power-switch domain. |
| Monotonic prebiased startup | Low-side MOSFET disabled until SS/TR ≥1.4 V - prevents output discharge during hot-insertion or rail sequencing. |
| Integrated MOSFETs | 55-mΩ high-side / 50-mΩ low-side Rds(on) - eliminates external FETs and drivers, reducing BOM count and layout area. |
| Flexible synchronization | SYNC pin supports master/slave operation with 100 kHz–1 MHz range and 500-kHz output capability - enables deterministic multi-phase timing. |
| Robust protection suite | Includes high-side current limit, bidirectional low-side current limit, BOOT-PH UVLO, thermal shutdown (175°C), and OV/UV monitoring via PWRGD. |
Applications
| Space Satellite FPGA Power | Microcontroller Core Supply |
|---|---|
|
Use Scenario: Powering Xilinx Kintex UltraScale+ FPGA core rails (0.85–0.95 V) in LEO satellite payloads with strict radiation tolerance requirements. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated core voltage with monotonic startup into prebiased configuration memory banks. Use Value: Radiation-hardened architecture ensures uninterrupted operation under cumulative ionizing dose and single-event effects in orbit. |
Use Scenario: Supplying ARM Cortex-R5F microcontroller core (1.0–1.2 V) in radiation-tolerant avionics control units. IC Role / Device Role / Timing Role: Point-of-load converter with precise 0.795-V reference and tight output voltage accuracy (±1.258%) for digital logic stability. Use Value: Integrated MOSFETs and 6-A capability eliminate external components, reducing board area and interconnect in constrained modules. |
| Satellite Payload Imaging Sensor | Radiation-Tolerant ASIC Bias |
|
Use Scenario: Generating clean 3.3-V analog supply for CMOS image sensor front-end in Earth observation satellites. IC Role / Device Role / Timing Role: High-efficiency (95% peak) buck converter with low-noise regulation and fast transient response for analog pixel readout. Use Value: Split VIN/PVIN architecture isolates sensitive analog circuitry from high-current digital switching noise. |
Use Scenario: Providing 1.8-V I/O supply to radiation-hardened ASICs in spacecraft telemetry subsystems. IC Role / Device Role / Timing Role: Sequenced power rail enabled by SS/TR pin and PWRGD open-drain output for controlled power-up/down. Use Value: Adjustable soft-start and tracking capability ensures safe voltage ramping across multiple ASIC domains without latch-up risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS50601-SP | Identical radiation-hardened spec, same HKH CFP package, but qualified for flight use (full MIL temp range –55°C to 125°C, burn-in, RHA testing). | Approved for production satellite deployment; TPS50601HKH/EM is engineering evaluation only, rated only to 25°C. | Select TPS50601-SP for flight hardware; use TPS50601HKH/EM for lab validation and early design prototyping. |
| LM70880QRNXTQ1 | Automotive AEC-Q100 Grade 1 (–40°C to 125°C), 8-A output, 2.7–5.5 V input, no radiation hardening, QFN package. | Targets automotive ADAS ECUs, not space applications; lacks SEL immunity, TID rating, or military temperature range. | Consider only for non-radiation environments requiring higher current and automotive qualification - not a drop-in replacement. |
Compared with TPS50601HKH/EM, the TPS50601-SP offers full flight qualification and extended temperature operation, while the LM70880QRNXTQ1 provides higher current and automotive compliance but zero radiation tolerance - making TPS50601HKH/EM uniquely suited for radiation-aware engineering evaluation prior to flight model build.
Availability
TPS50601HKH/EM is available at Aetrix Electronics and suitable for space satellite FPGA power, microcontroller core supply, imaging sensor bias, and radiation-tolerant ASIC applications requiring stable component supply during design validation and prototype integration phases.
Supply support for TPS50601HKH/EM 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability aerospace solutions, with decades of heritage in space-grade component development.
The TPS50601HKH/EM belongs to TI's radiation-hardened power management portfolio, designed specifically for mission-critical satellite and deep-space applications where reliability under extreme ionizing radiation and thermal stress is non-negotiable.
FAQ
What is the primary purpose of the TPS50601HKH/EM?
The TPS50601HKH/EM is an engineering evaluation sample of a radiation-hardened 6-A synchronous buck converter intended for prototyping and lab validation of space-grade power systems. It shares identical electrical and radiation specifications with the flight-qualified TPS50601-SP but is processed without burn-in or full temperature screening - rated only to 25°C ambient and not warranted for production or flight use.
Can TPS50601HKH/EM be used in flight hardware?
No. The TPS50601HKH/EM is explicitly designated for engineering evaluation only: it undergoes a non-compliant flow (no burn-in, limited test coverage), is characterized only at 25°C, and is not qualified to MIL-PRF-38535 Class V requirements. For flight hardware, the fully qualified TPS50601-SP must be used - it includes full radiation testing, extended temperature validation (–55°C to 125°C), and process controls required for space missions.
How does the split VIN/PVIN architecture benefit system design?
The TPS50601HKH/EM separates control logic supply (VIN: 3–6.3 V) from power switch supply (PVIN: 1.6–6.3 V), enabling independent optimization: PVIN can be derived from a low-voltage battery or intermediate rail while VIN remains stable for reliable gate driving and regulation. This isolation reduces noise coupling, improves light-load efficiency, and supports flexible power sequencing in multi-rail satellite subsystems.
What protection features does TPS50601HKH/EM include?
The TPS50601HKH/EM integrates comprehensive protection: cycle-by-cycle high-side current limiting (8–11 A), bidirectional low-side current limiting (7–10 A sourcing, 3 A sinking), BOOT-PH UVLO (2.2–3 V), thermal shutdown at 175°C with 10°C hysteresis, and PWRGD-monitored overvoltage (109% Vref) and undervoltage (91% Vref) detection. These ensure robust operation under overload, short-circuit, and thermal stress conditions typical in unattended space systems.
Is the TPS50601HKH/EM pin-compatible with other devices in the family?
Yes - the TPS50601HKH/EM uses the same 20-pin HKH ceramic flatpack package and identical pinout as the TPS50601-SP. All signal names, functions, and electrical characteristics match exactly per the SLVSD45 datasheet. This allows direct substitution in evaluation boards and layout reuse between engineering samples and flight models, simplifying design transition.
TPS50601HKH/EM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 20-CDFF
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 6.3V
- Voltage - Output (Min/Fixed):
- 0.795V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 6A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- 25°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-CFP
TPS50601HKH/EM FAQ
1.How can I place an order for TPS50601HKH/EM through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS50601HKH/EM 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 TPS50601HKH/EM reliable?
The price and inventory of TPS50601HKH/EM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS50601HKH/EM is usually 5 days.
3.What payment methods are accepted for TPS50601HKH/EM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS50601HKH/EM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS50601HKH/EM?
TPS50601HKH/EM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS50601HKH/EM 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 TPS50601HKH/EM?
For technical support, including TPS50601HKH/EM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS50601HKH/EM requirements.
6.How does Aetrix verify that TPS50601HKH/EM is sourced from the original manufacturer or authorized distributors?
All TPS50601HKH/EM 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 TPS50601HKH/EM meets industry standards.
7.What is the process for return or replacement of TPS50601HKH/EM?
All TPS50601HKH/EM units undergo pre-shipment inspection (PSI). If there is an issue with TPS50601HKH/EM, 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 TPS50601HKH/EM part is unused and in its original packaging.
Return procedure for TPS50601HKH/EM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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