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Renesas UPD120N18T1B-AZ
- Part No.:
- UPD120N18T1B-AZ
- Manufacturer:
- Renesas
- Package:
- TO-243AA
- Datasheet:
-
UPD120N18T1B-AZ.pdf
- Description:
- IC REG LINEAR 1.8V 300MA SC62
- Quantity:
- Payment:
- Shipping:
Inventory:9,550
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Product details
Overview
UPD120N18T1B-AZ from Renesas Electronics is a three-terminal, low-dropout positive-voltage regulator delivering 1.8 V at up to 0.3 A output current in SC-62 package. It features 60 μA typical quiescent current, on-chip overcurrent and thermal protection, and 0.4 V typical dropout voltage at 0.15 A load. It serves as a stable local power supply for low-voltage digital ICs in space-constrained consumer electronics.
For engineers reviewing the UPD120N18T1B-AZ datasheet, UPD120N18T1B-AZ pinout, UPD120N18T1B-AZ application, or UPD120N18T1B-AZ equivalent, key selection criteria include dropout voltage under load, output voltage accuracy (±1.5% over line/load/temperature), thermal resistance (62.5°C/W on 16 cm² ceramic substrate), and Pb-free SC-62 packaging compliance.
Technical Context
The UPD120N18T1B-AZ uses a CMOS-based LDO architecture with internal reference voltage circuitry, error amplifier, and protection blocks for overcurrent and thermal shutdown. Its low 60 μA quiescent current enables battery-powered operation without significant standby drain.
It operates within 3.2–5.5 V input range and maintains regulated 1.8 V output across −40°C to +85°C ambient temperature. Dropout voltage rises predictably with load (0.4 V TYP. at 0.15 A; 1.0 V MAX. at 0.3 A), and ripple rejection reaches 63 dB at 1 kHz - critical for noise-sensitive digital loads like audio DACs and HDD controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±1.5% (VO2 spec: 1.746–1.854 V over full line/load/temp range) |
| Max Output Current | 0.3 A continuous - supports logic rails for SoCs, FPGAs, and interface ICs |
| Dropout Voltage | 0.4 V TYP. at 0.15 A; 1.0 V MAX. at 0.3 A - enables operation from 3.3 V rail with margin |
| Quiescent Current | 60 μA TYP. at zero load - minimizes battery discharge in always-on subsystems |
| Ripple Rejection | 63 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters |
| Thermal Resistance | 62.5°C/W (junction-to-ambient, mounted on 16 cm² ceramic substrate) |
| Protection Features | Integrated overcurrent and thermal shutdown - prevents damage during fault conditions |
Pinout & Package
UPD120N18T1B-AZ is housed in SC-62 surface-mount package (4.0 ±0.25 mm × 2.5 ±0.1 mm × 1.5 ±0.1 mm), a compact 3-pin leadframe design optimized for high thermal performance and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Regulator input supply connection | Accepts 3.2–5.5 V input; requires ≥0.1 μF bypass capacitor placed within 2 cm |
| 2 (GND) | Ground reference terminal | Common return path for input/output currents; must be low-impedance to minimize noise coupling |
| 3 (OUTPUT) | Regulated 1.8 V output node | Delivers up to 0.3 A; requires ≥10 μF output capacitor (ESR 1–8 Ω) for stability |
Key Features
| Feature | Design Value |
|---|---|
| Low quiescent current | 60 μA typical - extends battery life in portable audio and set-top box standby modes |
| CMOS process technology | Enables ultra-low bias current and high PSRR without PNP pass transistor limitations |
| On-chip protection | Thermal shutdown activates at TJ > 150°C; overcurrent limit clamps peak output to ~0.2 A |
| Pb-free construction | AZ suffix denotes RoHS-compliant external electrodes - meets global environmental compliance requirements |
| Stable with ceramic capacitors | Designed for 10 μF COUT with 1–8 Ω ESR - eliminates need for tantalum or aluminum electrolytics |
Applications
| Digital TV Power Rail | HDD Preamp Supply |
|---|---|
|
Use Scenario: Local 1.8 V supply for video decoder ASIC and HDMI transmitter in flat-panel TV mainboard. IC Role / Device Role / Timing Role: Low-noise post-regulator stepping down from 3.3 V system rail to meet tight voltage tolerance of digital video interfaces. Use Value: 63 dB ripple rejection suppresses DC/DC switching artifacts that cause visible banding in high-resolution displays. |
Use Scenario: Dedicated 1.8 V bias for read/write channel preamplifier in 2.5-inch notebook HDD. IC Role / Device Role / Timing Role: Ultra-low-noise linear regulator supplying analog front-end circuitry sensitive to supply-induced jitter. Use Value: 120 μVr.m.s. output noise ensures minimal SNR degradation in high-density magnetic recording channels. |
| Audio DAC Reference | Set-Top Box USB PHY |
|
Use Scenario: Clean 1.8 V reference for stereo audio DAC in home theater receiver. IC Role / Device Role / Timing Role: Precision voltage source for DAC core and digital filter logic, decoupled from noisy digital supply domains. Use Value: ±0.06 mV/°C temperature coefficient maintains THD+N stability across operating temperature range. |
Use Scenario: 1.8 V I/O supply for USB 2.0 transceiver in cable/satellite STB. IC Role / Device Role / Timing Role: Regulated interface voltage meeting USB electrical specification for signal integrity and ESD robustness. Use Value: SC-62 package's 62.5°C/W thermal resistance allows full 0.3 A load without derating in confined chassis environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2204K-18W5-7 (Diodes Inc.) | 0.3 A rated, 1.8 V fixed, SOT-25 package; 70 μA IQ; 300 mV dropout at 0.15 A | Slightly lower dropout but higher quiescent current; lacks thermal shutdown flag output | Preferred where board space permits SOT-25 and lower dropout is prioritized over thermal monitoring capability |
| TCP1025-18I/V (Microchip) | 0.3 A rated, 1.8 V fixed, SOT-23 package; 55 μA IQ; 400 mV dropout at 0.15 A; integrated enable pin | Includes active-low EN control; smaller footprint but higher thermal resistance (200°C/W) | Selected when system-level power sequencing or remote ON/OFF control is required |
Compared with UPD120N18T1B-AZ, AP2204K-18W5-7 offers lower dropout but less robust thermal protection, while TCP1025-18I/V adds enable functionality at the cost of thermal performance - making UPD120N18T1B-AZ optimal for thermally demanding, always-on 1.8 V rail applications without sequencing needs.
Availability
UPD120N18T1B-AZ is available at Aetrix Electronics and suitable for digital TV, audio equipment, HDD, and DVD applications requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for UPD120N18T1B-AZ 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 is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and consumer systems.
The μPD120Nxx series was designed specifically for low-power, space-constrained consumer electronics requiring stable, low-noise, low-quiescent-current regulation - targeting digital TV, audio, and storage subsystems.
FAQ
What is the minimum input voltage required for stable operation of the UPD120N18T1B-AZ?
The UPD120N18T1B-AZ requires a minimum input voltage of 3.2 V to maintain regulation across its full 0–0.3 A load range and −40°C to +85°C ambient temperature. Below this threshold, output voltage drops below 1.8 V due to dropout - verified per Recommended Operating Conditions table on page 4 of R03DS0030EJ0400.
Does the UPD120N18T1B-AZ require external capacitors, and what are the recommended values?
Yes, the UPD120N18T1B-AZ requires both input (CIN ≥ 0.1 μF) and output (COUT ≥ 10 μF) ceramic capacitors placed within 2 cm of the IC pins. COUT must have 1–8 Ω equivalent series resistance to ensure stability - specified in Typical Connection diagram on page 3 of R03DS0030EJ0400.
How does thermal protection operate in the UPD120N18T1B-AZ?
The UPD120N18T1B-AZ shuts down output when junction temperature exceeds 150°C, as stated in Absolute Maximum Ratings. Recovery occurs automatically once TJ falls below the hysteresis threshold (~140°C). This behavior is internally implemented and requires no external components - confirmed in Block Diagram and Caution notes on pages 1 and 3.
Is the UPD120N18T1B-AZ compatible with lead-free reflow soldering processes?
Yes, the UPD120N18T1B-AZ is Pb-free (AZ suffix) and qualified for infrared reflow with peak package surface temperature ≤260°C for ≤60 seconds at ≥220°C - per Recommended Soldering Conditions on page 12 of R03DS0030EJ0400. It complies with JEDEC J-STD-020 moisture sensitivity level 1.
What is the output voltage accuracy of the UPD120N18T1B-AZ over temperature and load?
The UPD120N18T1B-AZ guarantees output voltage between 1.746 V and 1.854 V (±3% total variation) across 3.2–5.5 V input, 0–0.3 A load, and −40°C to +85°C ambient - defined as VO2 parameter in Electrical Characteristics table on page 4 of R03DS0030EJ0400.
UPD120N18T1B-AZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.65V @ 150mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 120 µA
- Current - Supply (Max):
- -
- PSRR:
- 63dB (1kHz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-62
UPD120N18T1B-AZ FAQ
1.How can I place an order for UPD120N18T1B-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD120N18T1B-AZ 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 UPD120N18T1B-AZ reliable?
The price and inventory of UPD120N18T1B-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD120N18T1B-AZ is usually 5 days.
3.What payment methods are accepted for UPD120N18T1B-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD120N18T1B-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD120N18T1B-AZ?
UPD120N18T1B-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD120N18T1B-AZ 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 UPD120N18T1B-AZ?
For technical support, including UPD120N18T1B-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD120N18T1B-AZ requirements.
6.How does Aetrix verify that UPD120N18T1B-AZ is sourced from the original manufacturer or authorized distributors?
All UPD120N18T1B-AZ 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 UPD120N18T1B-AZ meets industry standards.
7.What is the process for return or replacement of UPD120N18T1B-AZ?
All UPD120N18T1B-AZ units undergo pre-shipment inspection (PSI). If there is an issue with UPD120N18T1B-AZ, 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 UPD120N18T1B-AZ part is unused and in its original packaging.
Return procedure for UPD120N18T1B-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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