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onsemi MC78PC33NTR
- Part No.:
- MC78PC33NTR
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MC78PC33NTR.pdf
- Description:
- IC REG LINEAR 3.3V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,553
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Product details
Overview
MC78PC33NTR from onsemi is a CMOS low-dropout linear voltage regulator delivering 3.3 V ±2.0% output with 150 mA nominal current, 0.20 V typical dropout at 100 mA, and 70 dB ripple rejection at 1 kHz - designed for battery-powered hand-held communication equipment requiring stable low-noise power.
For engineers reviewing the MC78PC33NTR datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low 35 µA supply current in ON mode, built-in chip enable (CE) input, SOT-23-5 package compatibility with LP2980-series footprints, and temperature-stable ±100 ppm/°C output drift.
Technical Context
The MC78PC33NTR integrates an internal voltage reference, error amplifier, resistor divider network (R1/R2), current-limiting circuit, and CE-controlled enable logic to regulate output voltage dynamically. Its CMOS architecture enables fast line/load transient response critical for GSM/CDMA phone power rails.
Operation requires external output capacitor (≥4.7 µF tantalum or ceramic) for phase compensation and stability across load current (1–150 mA) and input voltage (3.5–8.0 V). CE pin accepts 0–0.25 V for OFF mode (0.1 µA standby) and ≥1.5 V for ON mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±2.0% - tightly regulated rail for 3.3 V logic, RF front-ends, and baseband ICs |
| Max Output Current | 150 mA - sufficient for single-core microcontrollers, audio codecs, and sensor interfaces |
| Dropout Voltage | 0.20 V typ @ 100 mA - enables operation from 3.5 V input down to 3.3 V output under full load |
| Ripple Rejection | 70 dB @ 1 kHz - suppresses switching noise from upstream DC-DC converters feeding cellular RF sections |
| Supply Current | 35 µA typ (ON), 0.1 µA typ (OFF) - extends battery life in sleep/wake cycling applications |
| Output Noise | 30 µVrms (10 Hz–100 kHz) - low enough for analog sensor signal chains and ADC reference supplies |
| Temp Coefficient | ±100 ppm/°C - ensures <±3 mV drift over −40°C to +85°C ambient for precision analog subsystems |
Pinout & Package
SOT-23-5 (Case 1212-01) surface-mount package: 2.8 mm × 2.5 mm footprint, 1.0–1.3 mm height, Pb-free compatible, tape-and-reel (3000 units/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply connection | Accepts 3.5–8.0 V DC; requires ≥1.0 µF bypass capacitor near pin for noise immunity |
| 2 - GND | Ground reference | Low-impedance return path; must be routed wide and short to minimize noise coupling |
| 3 - CE | Chip enable control input | Active-high logic: <0.25 V = OFF (0.1 µA), >1.5 V = ON (35 µA); enables system-level power sequencing |
| 4 - N/C | No connection | Internally unconnected; must remain floating - no external tie or pull-up/down |
| 5 - VOUT | Regulated output | Delivers 3.3 V ±2.0%; requires ≥4.7 µF output capacitor with ESR ≤1 Ω for stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ON-mode supply current | 35 µA typical - reduces quiescent power loss in always-on subsystems like real-time clocks |
| Built-in chip enable (CE) circuit | Logic-compatible CE pin with 0.1 µA standby - eliminates need for external enable FET or level shifter |
| Low dropout voltage | 0.20 V typical @ 100 mA - maximizes usable battery voltage range in single-cell Li-ion (3.0–4.2 V) systems |
| High ripple rejection | 70 dB @ 1 kHz - maintains clean 3.3 V rail despite noisy switcher inputs common in portable designs |
| Identical pinout to LP2980 series | Drop-in replacement for LP2980-3.3, LP2981-3.3, LP2982-3.3 - simplifies redesign and second-sourcing |
Applications
| Cellular Phone Power Management | Cordless Phone Base Station |
|---|---|
Use Scenario: Supplies 3.3 V to GSM/CDMA baseband processor and RF transceiver during active call mode. IC Role / Device Role / Timing Role: Primary LDO regulator providing low-noise, fast-transient power to sensitive RF and digital blocks. Use Value: 70 dB ripple rejection prevents switching noise from DC-DC converters from degrading receiver sensitivity or causing bit errors. |
Use Scenario: Powers PHS/DECT digital signal processor and interface logic in cordless phone base station. IC Role / Device Role / Timing Role: Standby-active LDO enabling rapid wake-from-sleep transitions while maintaining tight 3.3 V regulation. Use Value: 0.1 µA standby current extends AC adapter efficiency during idle periods without compromising startup speed. |
| Digital Camera Image Sensor Supply | Portable Medical Monitor Front-End |
Use Scenario: Provides clean 3.3 V bias to CMOS image sensor and analog front-end during video capture. IC Role / Device Role / Timing Role: Low-noise analog supply LDO decoupling digital switching noise from image sensor pixel array. Use Value: 30 µVrms output noise prevents fixed-pattern noise and quantization artifacts in 10+ bit image data paths. |
Use Scenario: Regulates 3.3 V for ECG/SpO₂ analog signal conditioning and low-power MCU in handheld patient monitor. IC Role / Device Role / Timing Role: Precision voltage reference source with ±100 ppm/°C drift for calibrated analog measurements. Use Value: Tight ±2.0% initial accuracy and low tempco ensure measurement repeatability across clinical operating environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP2980AIM5-3.3/NOPB | Same SOT-23-5 pinout; 60 µA typical supply current (vs. 35 µA); 65 dB RR @ 1 kHz (vs. 70 dB) | Higher quiescent current limits battery runtime in ultra-low-power sleep modes | Select when legacy LP2980 footprint reuse is mandatory and 35 µA savings is non-critical |
| MCP1700T-3302E/TT | 350 mA max output (vs. 150 mA); 1.6 µA quiescent (vs. 35 µA); no CE pin; different pinout (VIN-GND-VOUT) | Lacks enable control and cannot replace MC78PC33NTR in CE-driven power sequencing | Select only for new designs where CE is unnecessary and higher current headroom is required |
Compared with LP2980AIM5-3.3/NOPB, MC78PC33NTR offers lower quiescent current and better ripple rejection; compared with MCP1700T-3302E/TT, it provides CE functionality and tighter output accuracy but lower current capability - making MC78PC33NTR optimal for CE-dependent, noise-sensitive 150 mA applications.
Availability
MC78PC33NTR is available at Aetrix Electronics and suitable for cellular phone power management, cordless base stations, digital camera sensor supplies, and portable medical monitors requiring stable component supply with long-term lifecycle support.
Supply support for MC78PC33NTR 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 manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, and consumer markets.
The MC78PC00 series was designed specifically for low-noise, low-quiescent-current power regulation in battery-operated hand-held communication devices - emphasizing fast transient response, small footprint, and high accuracy over wide temperature ranges.
FAQ
What is the maximum input voltage rating for the MC78PC33NTR?
The MC78PC33NTR has an absolute maximum input voltage (VIN) rating of 9.0 V, but its recommended operating input voltage range is 3.5 V to 8.0 V per electrical characteristics testing conditions. Exceeding 8.0 V may degrade ripple rejection and increase thermal stress without improving regulation performance - always maintain VIN ≤ VOUT + 1.0 V for optimal dropout behavior in the MC78PC33NTR.
Does the MC78PC33NTR require an external capacitor on the CE pin?
No, the MC78PC33NTR does not require an external capacitor on the CE pin. The CE input is a CMOS logic-level control terminal with internal pull-down resistance (2.5–10 MΩ) and specified VIH ≥1.5 V and VIL ≤0.25 V. External filtering capacitors on CE are unnecessary and could slow enable/disable timing - the MC78PC33NTR is designed for direct connection to microcontroller GPIO or system power sequencer outputs.
What output capacitor value and type are recommended for stable operation of the MC78PC33NTR?
The MC78PC33NTR requires a minimum 4.7 µF output capacitor with ESR ≤1 Ω for guaranteed stability across 1–150 mA load current. Tantalum or low-ESR ceramic capacitors (e.g., X5R/X7R) are recommended; 10 µF improves transient response. Avoid mixing ceramic and tantalum types on VOUT, as this may cause oscillation - the MC78PC33NTR's phase compensation is optimized for single-capacitor configurations per Figure 47 and Application Hints.
Is the MC78PC33NTR pin-compatible with the LP2980-3.3 variant?
Yes, the MC78PC33NTR is explicitly designed with identical pinout to the LP2980/LP2981/LP2982 series per datasheet statement: "Identical Pinout to the LP2980/1/2." Pin 1 = VIN, Pin 2 = GND, Pin 3 = CE, Pin 4 = N/C, Pin 5 = VOUT - enabling direct PCB replacement without layout changes, provided the CE control logic levels (0.25 V low / 1.5 V high) match system requirements for the MC78PC33NTR.
What is the thermal shutdown behavior of the MC78PC33NTR under overload conditions?
The MC78PC33NTR incorporates internal current limiting (50 mA typical short-circuit current) but does not feature thermal shutdown protection. Under sustained overload or high ambient temperature, junction temperature may exceed 125°C (max operating TJ), leading to parametric drift or permanent damage. Designers must ensure adequate PCB copper area (≥100 mm² thermal pad) and limit power dissipation (PD ≤ 250 mW) - the MC78PC33NTR relies on external thermal design rather than integrated thermal foldback.
MC78PC33NTR 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):
- 8V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 100mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
MC78PC33NTR FAQ
1.How can I place an order for MC78PC33NTR through Aetrix?
Please submit a Request for Quotation (RFQ) for MC78PC33NTR 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 MC78PC33NTR reliable?
The price and inventory of MC78PC33NTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC78PC33NTR is usually 5 days.
3.What payment methods are accepted for MC78PC33NTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC78PC33NTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC78PC33NTR?
MC78PC33NTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC78PC33NTR 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 MC78PC33NTR?
For technical support, including MC78PC33NTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC78PC33NTR requirements.
6.How does Aetrix verify that MC78PC33NTR is sourced from the original manufacturer or authorized distributors?
All MC78PC33NTR 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 MC78PC33NTR meets industry standards.
7.What is the process for return or replacement of MC78PC33NTR?
All MC78PC33NTR units undergo pre-shipment inspection (PSI). If there is an issue with MC78PC33NTR, 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 MC78PC33NTR part is unused and in its original packaging.
Return procedure for MC78PC33NTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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