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STMicroelectronics RHFL7913KPA1
- Part No.:
- RHFL7913KPA1
- Manufacturer:
- STMicroelectronics
- Package:
- 16-CFlatpack
- Datasheet:
-
RHFL7913KPA1.pdf
- Description:
- RAD-HARD 2.0A ADJUSTABLE NEGATIV
- Quantity:
- Payment:
- Shipping:
Inventory:2,171
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Product details
Overview
RHFL7913KPA1 from STMicroelectronics is a QML-V qualified rad-hard adjustable negative voltage regulator in FLAT-16 hermetic ceramic package, delivering -1.2 V to -9.5 V output at up to 2 A, with 300 krad(Si) TID tolerance, -55 °C to +125 °C operating range, and TTL-compatible inhibit control - deployed in satellite power management subsystems requiring radiation resilience.
For engineers reviewing the RHFL7913KPA1 datasheet, RHFL7913KPA1 pinout, RHFL7913KPA1 application, or RHFL7913KPA1 equivalent, key selection criteria include dropout voltage (-750 mV @ 1 A), remote sensing capability, adjustable short-circuit current limit (via ISC pin), and compatibility with positive logic interface (VPLUS = 0–3 V) while biasing analog circuitry at negative potentials.
Technical Context
The RHFL7913KPA1 employs an NPN pass transistor architecture enabling low dropout operation by routing base current to ground rather than output, achieving -750 mV dropout at 1 A. Its internal band-gap reference (VADJ = -1.20 V) feeds an error amplifier comparing divided output voltage against this stable reference.
Logic interface isolation is implemented via dedicated VPLUS-supplied circuitry (0–3 V), decoupling TTL-level inhibit/OCM signals from the negative-biased analog core. Overtemperature shutdown activates at ~170 °C junction temperature with hysteresis (~100 °C recovery), and overcurrent protection uses non-foldback limiting with external resistor programmability on the ISC pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | -9.5 V to -1.2 V (adjustable via external R1/R2 divider; VADJ = -1.20 V) |
| Max Output Current | 2 A (continuous; derated above +125 °C ambient) |
| Dropout Voltage | -750 mV @ 1 A, TJ = 25 °C (enables regulation with minimal VI–VO headroom) |
| Radiation Tolerance | 300 krad(Si) total ionizing dose (TID) per MIL-STD-1019.7, SEL immune up to 68 MeV·cm²/mg |
| Inhibit Propagation Delay | tPLH = 20 µs, tPHL = 100 µs (supports fast ON/OFF sequencing in fault-recovery systems) |
| Line Regulation | 0.2 % (VI variation from VO–2.5 V to -12 V; critical for stable bus voltage under input transients) |
| Thermal Resistance | RthJC = 8.3 °C/W (enables direct heatsink mounting via metallized FLAT-16 flange) |
Pinout & Package
Package: FLAT-16 hermetic ceramic (MIL-STD-1835), metallized bottom flange for thermal anchoring to heatsink. Dimensions: 10.11 mm × 7.11 mm × 2.88 mm (max).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 5, 14, 15, 16 | VI (Negative Input) | Multiple VI pins must be shorted on PCB; accepts -12 V to -1.3 V input; powers analog core and pass element |
| 4, 7, 10 | GND (Signal Ground) | Low-current reference return for ADJ, OCM, Inhibit; separate from power ground to minimize sensing error |
| 6 | VPLUS (Positive Logic Supply) | Supplies TTL interface block (0–3 V); enables inhibit/OCM when >0 V; disables logic functions if grounded |
| 11 | Inhibit (TTL-compatible) | Active-low enable: <0.8 V = ON, >2.3 V = OFF; fast switching (20–100 µs) for system-level fault containment |
| 12 | ADJ (Voltage Feedback) | Connects to R1/R2 divider midpoint; sets VO = -1.20 V × (1 + R1/R2); max 10 kΩ to GND for <0.2% error |
| 13 | NC | No internal connection; must remain unconnected |
| 8, 9 | NC | No internal connection; must remain unconnected |
| 14, 15, 16 | VO (Negative Output) | Multiple VO pins must be shorted on PCB; delivers regulated negative output; supports remote sensing via kelvin ADJ trace |
Key Features
| Feature | Design Value |
|---|---|
| Rad-Hard Analog Core | QML-V qualified (SMD 5962-02532), 300 krad(Si) TID tolerance, heavy-ion SEL immunity up to 68 MeV·cm²/mg |
| Programmable Short-Circuit Limit | ISC pin accepts external resistor (10–200 kΩ) to set ISHORT from >4 A down to application-specific threshold |
| Remote Sensing Capability | Dedicated ADJ pin + separate signal GND allows kelvin sensing of load voltage, eliminating IR drop in long power traces |
| Positive Logic Interface | VPLUS-powered inhibit and OCM pins accept 0–3 V TTL signals while analog section operates fully at negative potentials |
| Thermal Protection with Hysteresis | Auto-shutdown at ~170 °C junction; automatic restart at ~100 °C, preventing thermal runaway during sustained overload |
Applications
| Spacecraft Power Distribution | Satellite Payload Bias Supplies |
|---|---|
|
Use Scenario: Regulating -5 V rail for CCD imaging sensors in low-Earth orbit satellites exposed to cumulative radiation. IC Role / Device Role / Timing Role: Negative voltage regulator providing stable, radiation-hardened bias with remote sensing to compensate for harness voltage drop. Use Value: Maintains ±0.5 % output accuracy after 300 krad(Si) exposure and enables precise sensor biasing despite thermal cycling from -55 °C to +125 °C. |
Use Scenario: Generating adjustable -3.3 V supply for RF front-end LNAs in geostationary telecom payloads. IC Role / Device Role / Timing Role: Programmable negative LDO with fast inhibit response for LNA power gating during antenna repositioning events. Use Value: 20 µs turn-on delay ensures clean power sequencing; 2 A capability supports burst-mode LNA operation without output sag. |
| Onboard Computer I/O Interface | Radiation-Tolerant Data Acquisition |
|
Use Scenario: Supplying -12 V to RS-422 transceivers in avionics data buses where EMI and single-event effects are critical. IC Role / Device Role / Timing Role: Radiation-hardened negative regulator with OCM flag signaling short-circuit events to flight software. Use Value: OCM pin sinks 10 mA when current limit activates, enabling real-time fault detection without additional monitoring circuitry. |
Use Scenario: Powering precision ADC reference buffers in scientific instrument modules aboard deep-space probes. IC Role / Device Role / Timing Role: Low-noise (-40 µVrms) negative regulator with <40 ppm/°C thermal drift and radiation-induced drift <8 ppm/krad. Use Value: Ensures <0.01 % reference stability over mission lifetime, directly supporting sub-LSB ADC accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar negative voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RHFL7913SCA1 | Same die, SMD5C package; rated for 3 A continuous output (vs. 2 A for KPA1); identical radiation specs and pinout logic | Higher current delivery required; board space constraints favor compact SMD5C over FLAT-16 footprint | Select SCA1 when >2 A load current or surface-mount assembly is mandatory; KPA1 preferred for FLAT-16 thermal anchoring |
| RHFL7913KPA-01V | Identical FLAT-16 package and electrical specs; differs only in ordering code (gold finish, EM1 grade vs. QML-V) | Non-flight qualification acceptable; engineering model use or ground-test hardware | Choose KPA-01V for prototyping or non-flight units; KPA1 carries full QML-V certification for flight hardware |
Compared with RHFL7913SCA1 and RHFL7913KPA-01V, RHFL7913KPA1 uniquely combines QML-V qualification, FLAT-16 thermal performance, and 2 A output in a flight-proven configuration-making it optimal for production spacecraft power stages where reliability, thermal margin, and certification alignment are jointly critical.
Availability
RHFL7913KPA1 is available at Aetrix Electronics and suitable for spacecraft power distribution, satellite payload bias supplies, onboard computer I/O interfaces, and radiation-tolerant data acquisition systems requiring stable component supply across extended mission lifetimes.
Supply support for RHFL7913KPA1 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, and radiation-hardened components for aerospace, automotive, and industrial markets.
RHFL7913KPA1 belongs to ST's high-reliability rad-hard analog product line, engineered specifically for space-grade power regulation where TID tolerance, SEL immunity, and QML-V compliance are non-negotiable design requirements.
FAQ
What is the maximum allowable input voltage for RHFL7913KPA1 when VPLUS = +3 V?
When VPLUS is set to +3 V, the absolute maximum DC input voltage (VI) is -9 V, as specified in Table 2 of DS4740 Rev 10. Exceeding this violates the |VIN – VPLUS| ≤ 12 V rating and risks permanent damage. This constraint arises because VI is referenced to ground while VPLUS is a positive supply; the differential stress across internal structures must remain within safe limits.
Can RHFL7913KPA1 operate without connecting VPLUS?
Yes - RHFL7913KPA1 functions as a basic negative regulator with VPLUS grounded or unconnected, but inhibit and OCM features become inactive. In this mode, the device remains permanently enabled (inhibit disabled), and OCM is "no care." All analog regulation (output voltage, current limit, thermal protection) remains fully operational since those blocks are biased at negative potentials independent of VPLUS.
How is remote sensing implemented on RHFL7913KPA1?
Remote sensing uses the ADJ pin and separate signal GND pins: the R1/R2 feedback divider is placed at the load, and its midpoint connects to ADJ via a dedicated kelvin trace. Signal GND (pins 4, 7, 10) is routed separately to the load ground point, carrying only quiescent current (<20 mA), thereby eliminating voltage drop errors caused by load current flowing through PCB ground impedance.
What external components are mandatory for stable operation?
Mandatory components include ≥1 µF tantalum capacitors on both input and output (per DS4740 Section 6), with ESR between 0.02 Ω and 20 Ω. A minimum 0.5 mA divider current is required for no-load regulation. For high-current or high-stability applications, a 470 nF polyester capacitor between VO and ADJ is recommended to improve phase margin and SVR at high frequencies.
RHFL7913KPA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-CFlatpack
- Packaging:
- Strip
- Product Status:
- Active
- Output Configuration:
- Negative
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- -12V
- Voltage - Output (Min/Fixed):
- -12V
- Voltage - Output (Max):
- -1.2V
- Voltage Dropout (Max):
- -
- Current - Output:
- 2A
- Current - Quiescent (Iq):
- 3 mA
- Current - Supply (Max):
- 90 mA
- PSRR:
- 60dB ~ 20dB (120Hz ~ 33kHz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-CFlatpack
RHFL7913KPA1 FAQ
1.How can I place an order for RHFL7913KPA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for RHFL7913KPA1 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 RHFL7913KPA1 reliable?
The price and inventory of RHFL7913KPA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RHFL7913KPA1 is usually 5 days.
3.What payment methods are accepted for RHFL7913KPA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RHFL7913KPA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RHFL7913KPA1?
RHFL7913KPA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RHFL7913KPA1 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 RHFL7913KPA1?
For technical support, including RHFL7913KPA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RHFL7913KPA1 requirements.
6.How does Aetrix verify that RHFL7913KPA1 is sourced from the original manufacturer or authorized distributors?
All RHFL7913KPA1 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 RHFL7913KPA1 meets industry standards.
7.What is the process for return or replacement of RHFL7913KPA1?
All RHFL7913KPA1 units undergo pre-shipment inspection (PSI). If there is an issue with RHFL7913KPA1, 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 RHFL7913KPA1 part is unused and in its original packaging.
Return procedure for RHFL7913KPA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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