My Inquiry
My Account
Texas Instruments UA7915CKTER
.jpg)
- Part No.:
- UA7915CKTER
- Manufacturer:
- Texas Instruments
- Package:
- TO-252-4, DPAK (3 Leads + Tab)
- Datasheet:
-
UA7915CKTER.pdf
- Description:
- IC REG LIN -15V 1.5A 3POWERFLEX
- Quantity:
- Payment:
- Shipping:
Inventory:4,482
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UA7915CKTER from Texas Instruments is a fixed negative-voltage linear regulator delivering –15 V output at up to 1.5 A, featuring internal short-circuit and thermal-overload protection, no external components required, and dropout voltage of 1.1 V at 1 A - used in industrial power supplies for local regulation of analog sensor front-ends.
For engineers reviewing the UA7915CKTER datasheet, UA7915CKTER pinout, UA7915CKTER application, or UA7915CKTER equivalent, key selection criteria include guaranteed –15 V output tolerance (±5% over 0°C–125°C), input voltage range (–17.5 V to –35 V), ripple rejection (≥54 dB at 120 Hz), thermal shutdown activation at ~150°C, and compatibility with standard 3-terminal regulator PCB footprints.
Technical Context
The UA7915CKTER implements a monolithic PNP pass transistor with safe-area compensation, internal current limiting set at ~2.1 A peak, and thermal shutdown triggered by die junction temperature exceeding 150°C. It operates without external capacitors for basic regulation but requires ≥2 µF input and ≥1 µF output capacitance for stability per TI test conditions.
Its architecture supports fixed-output operation only - no adjustability - and relies on common-emitter configuration with COMMON terminal tied to system ground. Input regulation error is ≤80 mV across –17.5 V to –35 V input, and output regulation drift is ≤200 mV from 5 mA to 1.5 A load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | –15 V ±5% (–14.25 V to –15.75 V) over 0°C–125°C operating range |
| Output Current | Up to 1.5 A continuous; 2.1 A peak - sufficient for powering op-amp rails or logic-level analog circuitry |
| Input Voltage Range | –17.5 V to –35 V - requires ≥2.5 V headroom above output for regulation |
| Dropout Voltage | 1.1 V at 1 A load - determines minimum input voltage needed for stable –15 V output |
| Ripple Rejection | ≥54 dB at 120 Hz - suppresses AC line noise in unregulated DC bus applications |
| Thermal Shutdown | Activates at ~150°C virtual junction temperature - prevents damage during overload or poor heatsinking |
| Bias Current | 2–3 mA typical - contributes to quiescent power loss; increases slightly with input voltage |
Pinout & Package
UA7915CKTER uses the PowerFLEX™ (KTE) flange-mount plastic package - 3-terminal, thermally enhanced with exposed metal tab electrically connected to COMMON pin. Mounting requires mechanical fastening and thermal interface to heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INPUT | Regulator input supply connection | Accepts unregulated negative DC input; must be ≥2.5 V more negative than output for regulation |
| OUTPUT | Regulated negative output terminal | Delivers stable –15 V to load; requires ≥1 µF ceramic or tantalum output capacitor for stability |
| COMMON | Reference and thermal return node | Connected to system ground; electrically tied to thermal tab - must be soldered or bolted to heatsink |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Enables drop-in replacement of discrete regulators; eliminates need for external feedback resistors or compensation networks |
| Internal short-circuit current limiting | Limits peak output current to ~2.1 A - protects device and upstream supply during output fault conditions |
| Safe-area compensated pass transistor | Prevents secondary breakdown under high-voltage/high-current stress - improves reliability in transient-heavy environments |
| Thermal overload protection | Shuts down regulator when junction exceeds ~150°C - allows automatic recovery after cooldown without latch-up |
| High power-dissipation capability | θJA = 23°C/W (on high-K board); enables >5 W dissipation with moderate heatsinking in industrial enclosures |
Applications
| Industrial Sensor Signal Conditioning | Legacy Analog Instrumentation |
|---|---|
|
Use Scenario: Local regulation of dual-rail op-amps and precision ADC drivers in factory-floor pressure/temperature transmitters. IC Role / Device Role / Timing Role: Negative rail generator providing clean –15 V for analog signal chain biasing. Use Value: Maintains <±5 mV output drift over temperature and load, ensuring sub-12-bit measurement accuracy without trimming. |
Use Scenario: Replacement power supply section in discontinued benchtop multimeters and oscilloscope auxiliary rails. IC Role / Device Role / Timing Role: Fixed negative voltage source replacing discrete Zener-transistor regulators. Use Value: Reduces BOM count by 4 components per rail and improves long-term output stability vs. aging discrete parts. |
| Programmable Logic Controller I/O Modules | Analog Output Driver Stages |
|
Use Scenario: Isolated analog output stage powering 4–20 mA loop drivers requiring symmetric ±15 V rails. IC Role / Device Role / Timing Role: Dedicated negative rail regulator with thermal foldback during field wiring faults. Use Value: Withstands sustained short-circuit events without failure due to integrated current limiting and thermal shutdown. |
Use Scenario: Biasing high-voltage op-amps in programmable voltage/current source modules. IC Role / Device Role / Timing Role: Stable –15 V reference for output amplifier stages driving reactive loads. Use Value: Ripple rejection ≥54 dB ensures <100 µV RMS noise on output rail - critical for <0.01% FSR accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar negative-voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM337T | Adjustable output (–1.2 V to –37 V); requires two external resistors; higher dropout (1.3 V) | Used where multiple negative voltages are needed on same board; less precise for fixed –15 V | Select LM337T only if design requires flexibility beyond –15 V or needs trimming capability |
| UA7915CKTTR | Same electrical specs; TO-263 (KTT) surface-mount package; RoHS-compliant; MSL Level-3 | Preferred for automated SMT assembly; requires reflow-compatible layout and thermal pad routing | Choose UA7915CKTTR for new designs needing volume manufacturability and modern compliance |
Compared with LM337T and UA7915CKTTR, the UA7915CKTER offers identical regulation performance in a through-hole flange-mount package optimized for manual assembly and high-power dissipation with bolted heatsinks - but lacks RoHS compliance and is obsolete per TI's status designation.
Availability
UA7915CKTER is available at Aetrix Electronics and suitable for industrial sensor conditioning, legacy instrumentation repair, and PLC I/O module refurbishment requiring stable component supply and long-lifecycle support.
Supply support for UA7915CKTER 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 company founded in 1930, specializing in analog, embedded processing, and power management ICs with broad industrial and automotive reach.
The µA7900 series - including UA7915CKTER - was designed for robust, no-frills negative-voltage regulation in harsh industrial environments where reliability, thermal resilience, and simplicity outweigh feature density.
FAQ
What is the output voltage tolerance of UA7915CKTER across temperature and load?
The UA7915CKTER delivers –15 V with ±5% tolerance (–14.25 V to –15.75 V) over the full operating temperature range of 0°C to 125°C and output current from 5 mA to 1.5 A. This specification is verified per TI's SLVS058H datasheet test conditions using 2 µF input and 1 µF output capacitance.
Does UA7915CKTER require external capacitors to operate stably?
Yes - UA7915CKTER requires a minimum 2 µF capacitor on the INPUT pin and a minimum 1 µF capacitor on the OUTPUT pin for stability and transient response, as defined in TI's recommended test conditions. Omitting these increases risk of oscillation or poor load regulation.
Is UA7915CKTER pin-compatible with other packages in the µA7900 series?
UA7915CKTER shares identical 3-pin functional assignment (INPUT–OUTPUT–COMMON) with TO-220 (KCS) and TO-263 (KTT) variants, but its PowerFLEX (KTE) footprint differs mechanically - the thermal tab position and mounting hole pattern are unique and not interchangeable without PCB redesign.
What is the maximum power dissipation capability of UA7915CKTER?
With θJA = 23°C/W on a high-thermal-conductivity PCB, UA7915CKTER can dissipate up to ~5.2 W continuously at 25°C ambient before reaching its 150°C thermal shutdown threshold. Actual usable power depends on heatsink efficiency and airflow - derating is required above 25°C ambient.
Why is UA7915CKTER marked as OBSOLETE by Texas Instruments?
Texas Instruments designated UA7915CKTER as OBSOLETE per its packaging status table, indicating discontinued production. The part remains functionally identical to active alternatives like UA7915CKTTR (TO-263), but UA7915CKTER lacks RoHS compliance and modern tape-and-reel packaging - making it suitable only for legacy repair or niche manual-assembly use cases.
UA7915CKTER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-252-4, DPAK (3 Leads + Tab)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Negative
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- -25V
- Voltage - Output (Min/Fixed):
- -15V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.1V @ 1A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 60dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 3-PowerFLEX™
UA7915CKTER FAQ
1.How can I place an order for UA7915CKTER through Aetrix?
Please submit a Request for Quotation (RFQ) for UA7915CKTER 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 UA7915CKTER reliable?
The price and inventory of UA7915CKTER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UA7915CKTER is usually 5 days.
3.What payment methods are accepted for UA7915CKTER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UA7915CKTER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UA7915CKTER?
UA7915CKTER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UA7915CKTER 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 UA7915CKTER?
For technical support, including UA7915CKTER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UA7915CKTER requirements.
6.How does Aetrix verify that UA7915CKTER is sourced from the original manufacturer or authorized distributors?
All UA7915CKTER 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 UA7915CKTER meets industry standards.
7.What is the process for return or replacement of UA7915CKTER?
All UA7915CKTER units undergo pre-shipment inspection (PSI). If there is an issue with UA7915CKTER, 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 UA7915CKTER part is unused and in its original packaging.
Return procedure for UA7915CKTER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UA7915CKTER Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
