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onsemi MC33761SNT1-030
- Part No.:
- MC33761SNT1-030
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MC33761SNT1-030.pdf
- Description:
- IC REG LINEAR 3V 80MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,804
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Product details
Overview
MC33761SNT1-030 from onsemi is an ultra-low-noise, low-dropout linear regulator delivering a precise 3.0 V output at up to 80 mA continuous current with 100 mA peak capability, 90 mV dropout at 30 mA, and 40 µVRMS integrated noise (100 Hz–100 kHz); it features 1.0 V logic-compatible ON/OFF control and is optimized for RF-sensitive portable systems such as TDMA phones and VCO power supplies.
For engineers reviewing the MC33761SNT1-030 datasheet, pinout, applications, or equivalent options, key selection criteria include its 150 nV/√Hz noise density at 1 kHz, 40 µs typical wake-up time at 200 Hz repetition rate, ±1.5% output accuracy at 25°C, and thermal shutdown at 125°C - all in a Pb-free Thin SOT-23-5 package.
Technical Context
The MC33761SNT1-030 employs a proprietary PNP pass transistor architecture with internal bandgap reference and no external bypass capacitor requirement, enabling fast transient response and eliminating startup delay caused by bypass charging. Its load transient improvement circuit actively detects output overshoot decay and forces rapid return to regulation - critical for burst-mode operation.
It achieves −75 dB static line regulation and 70 dB ripple rejection at 1 kHz while maintaining stability with 1.0 µF ceramic or tantalum output capacitors across a wide ESR range (a few mΩ to 3.0 Ω). The 1.0 V ON/OFF threshold (900 mV logic high) supports direct interface with 1.0 V platform microcontrollers without level shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V ±1.5% at 25°C; ±3.0% over −40°C to +85°C - ensures stable biasing for precision analog/RF circuits |
| Dropout Voltage | 90 mV @ 30 mA - enables operation with minimal input headroom (e.g., 3.1 V input for 3.0 V output) |
| Noise Performance | 40 µVRMS (100 Hz–100 kHz), 150 nV/√Hz @ 1 kHz - eliminates need for external noise filtering in VCO/PLL supplies |
| ON/OFF Threshold | 900 mV logic high, 150 mV logic low - directly compatible with 1.0 V I/O domains without translation circuitry |
| Startup Time | 40 µs typical (200 Hz repetitive) - enables rapid power cycling in TDMA burst systems without performance penalty |
| Ripple Rejection | 70 dB @ 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO |
| Thermal Shutdown | Activates at 125°C junction temperature - provides fail-safe protection during overload or poor PCB thermal design |
Pinout & Package
MC33761SNT1-030 is housed in a Pb-free Thin SOT-23-5 (Case 483) package with 0.95 mm maximum height, optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Input power supply | Accepts 3.1 V to 12 V input; must be decoupled with ≥1.0 µF capacitor near pin |
| 2 - GND | Ground reference | Common return path for input, output, and internal circuitry; requires low-inductance PCB connection |
| 3 - ON/OFF | Logic enable control | Active-high with 900 mV threshold; 250 kΩ internal pull-down ensures default OFF state if left floating |
| 4 - NC | No-connect terminal | Internally unconnected; must remain unconnected or tied to GND - not usable as feedback or bypass node |
| 5 - Vout | Regulated output | Delivers 3.0 V; requires ≥1.0 µF output capacitor (ceramic or tantalum) for stability across full ESR range |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise architecture | 40 µVRMS noise without external bypass capacitor - reduces BOM count and PCB area vs. conventional LDOs |
| Load transient improvement | Actively mitigates undershoot during rapid load reappearance after zero-current decay - essential for TDMA/RF burst timing integrity |
| 1.0 V logic compatibility | 900 mV ON threshold enables direct interface with 1.0 V microcontroller GPIOs - eliminates level-shifter ICs and associated layout complexity |
| Fast wake-up response | 40 µs typical transition from OFF to regulated 3.0 V output at 200 Hz repetition - supports high-duty-cycle burst modes without voltage droop |
| Wide ESR capacitor support | Stable with 1.0 µF output capacitors having ESR from a few mΩ to 3.0 Ω - allows use of low-cost ceramic or legacy tantalum parts |
Applications
| TDMA Mobile Transceivers | VCO/PLL Power Supply |
|---|---|
Use Scenario: Powering RF front-end circuitry in time-division multiple access (TDMA) handsets where transmit/receive bursts occur at 200 Hz with strict voltage stability requirements between slots. IC Role / Device Role / Timing Role: Provides clean, rapidly switched 3.0 V bias to power amplifier stages and synthesizer blocks during active transmit bursts. Use Value: 40 µs wake-up time and load transient improvement prevent output undershoot during slot transitions, preserving EVM and adjacent channel leakage ratio (ACLR). |
Use Scenario: Supplying local oscillator and phase-locked loop circuits requiring ultra-low phase noise and minimal supply-induced jitter. IC Role / Device Role / Timing Role: Delivers ultra-low-noise 3.0 V rail to VCO core and PLL charge pump, directly impacting integrated phase error and spectral purity. Use Value: 150 nV/√Hz noise density and 40 µVRMS broadband noise minimize close-in and broadband phase noise degradation in RF synthesizers. |
| Battery-Powered Medical Sensors | Portable Test & Measurement Front-Ends |
Use Scenario: Powering low-power analog signal chains (e.g., instrumentation amplifiers, ADC references) in wearable ECG or pulse oximetry devices operating from single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Regulates battery voltage down to stable 3.0 V for precision analog acquisition, with ON/OFF controlled by host MCU sleep/wake cycles. Use Value: 0.1 µA OFF-state current extends battery life; ±1.5% output accuracy ensures consistent ADC reference scaling across temperature and load. |
Use Scenario: Providing clean, switchable supply rails for handheld oscilloscope or spectrum analyzer front-end amplifiers and mixer stages. IC Role / Device Role / Timing Role: Supplies low-noise 3.0 V to RF gain blocks and IF filters during measurement acquisition, disabled during standby to reduce system idle power. Use Value: −75 dB line regulation rejects ripple from internal DC/DC converters; 70 dB ripple rejection at 1 kHz suppresses switching artifacts in baseband signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP1117ST30T3G | Fixed 3.0 V output, higher 1.2 V dropout, 42 µVRMS noise, no 1.0 V ON/OFF logic | Lacks fast wake-up and burst-mode optimization; requires ≥1.5 V input headroom | Choose when cost sensitivity outweighs noise/transient performance and 1.0 V logic interface is unnecessary |
| TPS7A2030PDBVR | 3.0 V output, 125 mV dropout, 12 µVRMS noise, 0.7 V ON threshold, SOT-23-5 package | Lower noise but incompatible 0.7 V ON threshold; not suitable for 1.0 V platform control | Prefer when ultra-low noise dominates and host MCU supports 0.7 V logic levels; verify ON/OFF compatibility first |
Compared with NCP1117ST30T3G and TPS7A2030PDBVR, MC33761SNT1-030 uniquely balances ultra-low noise, 1.0 V logic compatibility, and burst-mode transient resilience - making it irreplaceable in TDMA RF subsystems where all three attributes are simultaneously required.
Availability
MC33761SNT1-030 is available at Aetrix Electronics and suitable for TDMA transceivers, VCO/PLL power supplies, battery-powered medical sensors, portable test equipment, and other applications requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MC33761SNT1-030 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The MC33761SNT1-030 belongs to onsemi's ultra-low-noise LDO family designed specifically for RF and burst-mode portable electronics - prioritizing noise suppression, fast dynamic response, and 1.0 V logic integration over raw current capacity or ultra-miniaturization.
FAQ
What is the minimum input voltage required for MC33761SNT1-030 to maintain 3.0 V regulation?
The MC33761SNT1-030 requires a minimum input voltage of Vout + dropout voltage. At 30 mA load, dropout is 90 mV, so Vin must be ≥3.09 V. At 80 mA, dropout rises to 160 mV, requiring Vin ≥3.16 V. Input must also stay within absolute max rating of 12 V and above ground.
Does MC33761SNT1-030 require an external bypass capacitor for noise reduction?
No, MC33761SNT1-030 does not require an external bypass capacitor. Its proprietary architecture achieves 40 µVRMS noise (100 Hz–100 kHz) without one - unlike conventional LDOs that rely on bypass caps for noise filtering. This simplifies layout and eliminates startup delay associated with bypass charging.
Can MC33761SNT1-030 be used with a 1.0 V microcontroller GPIO to control ON/OFF?
Yes, MC33761SNT1-030 is explicitly designed for 1.0 V platforms: its ON threshold is 900 mV (typical), and OFF threshold is 150 mV (typical), allowing direct connection to 1.0 V logic outputs without level shifters or resistive dividers - confirmed in the datasheet's Logic Control Specifications table.
What output capacitor value and type are recommended for MC33761SNT1-030?
MC33761SNT1-030 requires a minimum 1.0 µF output capacitor, and is stable with ceramic or tantalum types exhibiting ESR from a few mΩ up to 3.0 Ω. Unlike many LDOs, it imposes no minimum ESR constraint - enabling use of low-ESR ceramic capacitors without risk of oscillation.
How does MC33761SNT1-030 handle rapid load transients in burst-mode systems?
MC33761SNT1-030 implements patented load transient improvement circuitry that detects output voltage overshoot decay and forces rapid return to regulation - preventing deep undershoot when load reappears after zero-current periods. This is validated in Figures 10–11 of the datasheet and critical for TDMA slot timing integrity.
MC33761SNT1-030 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 80mA
- Current - Output:
- 80mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Antisaturation, Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
MC33761SNT1-030 FAQ
1.How can I place an order for MC33761SNT1-030 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33761SNT1-030 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 MC33761SNT1-030 reliable?
The price and inventory of MC33761SNT1-030 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33761SNT1-030 is usually 5 days.
3.What payment methods are accepted for MC33761SNT1-030?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33761SNT1-030 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33761SNT1-030?
MC33761SNT1-030 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33761SNT1-030 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 MC33761SNT1-030?
For technical support, including MC33761SNT1-030 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33761SNT1-030 requirements.
6.How does Aetrix verify that MC33761SNT1-030 is sourced from the original manufacturer or authorized distributors?
All MC33761SNT1-030 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 MC33761SNT1-030 meets industry standards.
7.What is the process for return or replacement of MC33761SNT1-030?
All MC33761SNT1-030 units undergo pre-shipment inspection (PSI). If there is an issue with MC33761SNT1-030, 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 MC33761SNT1-030 part is unused and in its original packaging.
Return procedure for MC33761SNT1-030:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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