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Renesas UPD12115T1F-E1-AT
- Part No.:
- UPD12115T1F-E1-AT
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
-
UPD12115T1F-E1-AT.pdf
- Description:
- FIXED POSITIVE STANDARD REG
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Product details
Overview
UPD12115T1F-E1-AT from Renesas Electronics is a fixed-output 1.5 V, 1.0 A CMOS low-dropout linear regulator in TO-252 (MP-3ZK) package, featuring 1.0 V max dropout at full load, ±2.0% output voltage tolerance at 25°C, and integrated over-current and thermal shutdown protection. It powers low-voltage LSI in digital consumer appliances requiring stable, low-noise DC supply with ON/OFF control.
For engineers reviewing the UPD12115T1F-E1-AT datasheet, UPD12115T1F-E1-AT pinout, UPD12115T1F-E1-AT application, or UPD12115T1F-E1-AT equivalent, key selection criteria include dropout voltage under 1 A load, standby current ≤1 μA, compatibility with ≥10 μF laminated ceramic output capacitors, and thermal resistance (junction-to-case) of 12.5°C/W for board-level thermal design.
Technical Context
The UPD12115T1F-E1-AT employs a CMOS-based error amplifier architecture with internal reference voltage trimming, enabling tight output regulation (±2.0%) across temperature and load. Its dropout voltage remains ≤1.0 V at 1.0 A, supporting operation from as low as 2.5 V input while delivering 1.5 V output.
It integrates dual protection circuits: an on-chip over-current limiter that caps peak output current at 0.7 A during short-circuit events, and a thermal shutdown circuit activating at TJ ≥150°C. The ON/OFF pin accepts 0–VIN logic-level control with <2 μA input current and guarantees <0.5 V OFF-state output voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±2.0% at TJ = 25°C - ensures stable core supply for 1.5 V logic LSI without external feedback components. |
| Max Output Current | 1.0 A continuous - supports power delivery to mid-power digital ICs such as microcontrollers or interface transceivers. |
| Dropout Voltage | ≤1.0 V at IO = 1.0 A - enables operation from 2.5 V input, critical for battery-powered or multi-rail systems with tight headroom. |
| Quiescent Current | 150 μA typical at zero load - minimizes standby power loss in always-on subsystems. |
| Standby Current | ≤1 μA when ON/OFF = 0 V - allows ultra-low-power system sleep modes without external disconnect switches. |
| Ripple Rejection | 65 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Resistance (J-C) | 12.5°C/W - permits direct mounting to copper pour or heatsink for >5 W dissipation capability at TC = 25°C. |
Pinout & Package
Package: 5-pin TO-252 (MP-3ZK), surface-mount, with exposed GND tab (Pin 6) for thermal conduction. Pin 3 is cut and non-functional; Pin 4 is NC (no connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Regulator input supply | Accepts 2.5–5.5 V input; requires ≥0.1 μF bypass capacitor close to pin to prevent oscillation. |
| 2 (ON/OFF) | Digital enable control | Active-high logic input; drives output to regulated state when ≥1.5 V; pulls output to <0.5 V when grounded. |
| 3 (GND) | Signal ground reference | Cut pin - not connected to substrate; electrically isolated per marking diagram. |
| 4 (NC) | No connection | Internally unconnected; must remain floating or tied to GND per layout best practice. |
| 5 (OUTPUT) | Regulated 1.5 V output | Delivers up to 1.0 A; requires ≥10 μF output capacitor with ESR ≥0.01 Ω for stability per datasheet curve. |
| 6 (GND / Fin) | Power ground & thermal pad | Exposed metal tab; electrically common with Pin 3 (GND); must be soldered to large PCB copper area for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| CMOS process technology | Enables ultra-low quiescent current (150 μA typ.) and high PSRR without bipolar base-drive losses. |
| Integrated thermal shutdown | Automatically disables output when junction temperature exceeds 150°C, preventing permanent damage during overload or poor heatsinking. |
| Laminated ceramic capacitor support | Stable operation with ≥10 μF X5R/X7R MLCCs - eliminates need for bulk electrolytic capacitors and reduces board area. |
| On-chip over-current protection | Limits short-circuit current to ≤0.7 A, protecting both regulator and downstream circuitry during fault conditions. |
| Pb-free construction | RoHS-compliant external electrodes and packaging - meets EU environmental compliance requirements without derating. |
Applications
| Portable Media Players | Digital Still Cameras |
|---|---|
|
Use Scenario: Powering image signal processor (ISP) and memory interface in compact camera modules. IC Role / Device Role / Timing Role: Primary 1.5 V core supply regulator for low-voltage CMOS sensors and embedded SRAM. Use Value: 1.0 A capacity and 1.0 V dropout allow direct regulation from single-cell Li-ion (3.0–4.2 V) without intermediate buck stage. |
Use Scenario: Supplying 1.5 V logic rails to LCD controller and flash memory interface in DSLR sub-systems. IC Role / Device Role / Timing Role: Fixed-output LDO providing clean, low-noise bias for timing-critical display data paths. Use Value: 65 dB ripple rejection at 1 kHz suppresses switching noise from main 3.3 V DC/DC converter, preventing display artifacts. |
| Set-Top Box SoC Cores | USB Peripheral Controllers |
|
Use Scenario: Delivering 1.5 V to ARM Cortex-A series CPU cores in media streaming devices. IC Role / Device Role / Timing Role: High-current, low-dropout regulator enabling dynamic voltage scaling during burst processing. Use Value: ≤1 μA standby current supports deep-sleep modes compliant with Energy Star standby power limits (<0.5 W). |
Use Scenario: Powering USB 2.0 PHY and transceiver logic in hub controllers and dongles. IC Role / Device Role / Timing Role: Dedicated 1.5 V rail isolating high-speed analog PHY from noisy digital domains. Use Value: Integrated thermal shutdown prevents latch-up during hot-plug transient overloads on USB VBUS lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B152MR-G | Same 1.5 V fixed output, 1 A rating, but uses SOT-23-5 package (0.95 mm height); dropout 0.35 V @ 100 mA only - not rated at 1 A. | Lower thermal mass; unsuitable for sustained 1 A loads without aggressive PCB cooling. | Select if board space is constrained and peak load ≤300 mA; verify thermal performance with actual layout. |
| Rohm BD15GA5WEFJ-E2 | 1.5 V, 1 A, HTSOP-J8 package; dropout 0.45 V @ 1 A; includes reverse-current protection and higher PSRR (70 dB @ 1 kHz). | Superior noise immunity and reverse-battery robustness; requires larger footprint than TO-252. | Prefer for automotive-grade designs needing reverse-polarity tolerance and tighter ripple suppression. |
Compared with UPD12115T1F-E1-AT, the XC6219B152MR-G trades thermal capability for miniaturization, while the BD15GA5WEFJ-E2 adds protection features and lower dropout at full load but increases package size and cost - making UPD12115T1F-E1-AT optimal for cost-sensitive, thermally managed consumer applications requiring proven 1 A continuous operation in TO-252.
Availability
UPD12115T1F-E1-AT is available at Aetrix Electronics and suitable for portable media players, digital still cameras, set-top box SoC cores, and USB peripheral controllers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for UPD12115T1F-E1-AT 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
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and connectivity solutions for industrial, automotive, and consumer markets.
The UPD12115 belongs to Renesas' legacy CMOS LDO regulator product line, designed specifically for low-noise, low-quiescent-current power management in battery-operated and space-constrained digital appliances.
FAQ
What is the maximum input voltage rating for the UPD12115T1F-E1-AT?
The UPD12115T1F-E1-AT has an absolute maximum input voltage rating of +6.0 V. Operation above this level risks permanent damage. The recommended operating input range is 2.5 V to 5.5 V, ensuring stable 1.5 V output across full load and temperature. Exceeding 5.5 V may degrade long-term reliability even if below the 6.0 V absolute limit.
Does the UPD12115T1F-E1-AT require an external output capacitor, and what type is recommended?
Yes, the UPD12115T1F-E1-AT requires a minimum 10 μF output capacitor. Laminated ceramic capacitors (X5R/X7R) are explicitly supported and recommended, provided their effective capacitance remains ≥10 μF across the operating voltage and temperature range. The datasheet defines a stable ESR operating window (0.01–0.1 Ω at 1 kHz) to avoid oscillation.
How does the ON/OFF pin function on the UPD12115T1F-E1-AT?
The ON/OFF pin on the UPD12115T1F-E1-AT is an active-high digital enable input. When pulled to ≥1.5 V (with VIN present), the regulator delivers 1.5 V output. When held at 0 V, output drops to <0.5 V and quiescent current falls to ≤1 μA. The pin draws <2 μA, allowing direct drive from MCU GPIO without buffering.
What thermal management considerations apply to the UPD12115T1F-E1-AT in TO-252 package?
The UPD12115T1F-E1-AT's TO-252 package features an exposed GND tab (Pin 6) with Rth(J-C) = 12.5°C/W. For reliable 1.0 A operation, this tab must be soldered to ≥2 cm² of 2-oz copper on the PCB. Without heatsinking, power dissipation is limited to ~0.8 W at TA = 85°C; with adequate copper, >5 W is achievable before thermal shutdown activates at TJ = 150°C.
Is the UPD12115T1F-E1-AT RoHS-compliant and lead-free?
Yes, the UPD12115T1F-E1-AT is Pb-free per its datasheet note: "This product does not contain Pb in the external electrode and other parts." It complies with the EU RoHS Directive and is marked with appropriate RoHS identifiers in Renesas documentation and reel labeling.
UPD12115T1F-E1-AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- -
- Output Type:
- -
- Number of Regulators:
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- -
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
UPD12115T1F-E1-AT FAQ
1.How can I place an order for UPD12115T1F-E1-AT through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD12115T1F-E1-AT 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 UPD12115T1F-E1-AT reliable?
The price and inventory of UPD12115T1F-E1-AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD12115T1F-E1-AT is usually 5 days.
3.What payment methods are accepted for UPD12115T1F-E1-AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD12115T1F-E1-AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD12115T1F-E1-AT?
UPD12115T1F-E1-AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD12115T1F-E1-AT 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 UPD12115T1F-E1-AT?
For technical support, including UPD12115T1F-E1-AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD12115T1F-E1-AT requirements.
6.How does Aetrix verify that UPD12115T1F-E1-AT is sourced from the original manufacturer or authorized distributors?
All UPD12115T1F-E1-AT 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 UPD12115T1F-E1-AT meets industry standards.
7.What is the process for return or replacement of UPD12115T1F-E1-AT?
All UPD12115T1F-E1-AT units undergo pre-shipment inspection (PSI). If there is an issue with UPD12115T1F-E1-AT, 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 UPD12115T1F-E1-AT part is unused and in its original packaging.
Return procedure for UPD12115T1F-E1-AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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