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onsemi MC78PC28NTRG
- Part No.:
- MC78PC28NTRG
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MC78PC28NTRG.pdf
- Description:
- IC REG LINEAR 2.8V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,804
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Product details
Overview
MC78PC28NTRG from onsemi is a CMOS low-dropout linear voltage regulator delivering 2.8 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 MC78PC28NTRG datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, SOT-23-5 pin mapping, real-world use cases in portable RF systems, and validated alternative regulators for supply chain continuity.
Technical Context
The MC78PC28NTRG integrates an internal voltage reference, error amplifier, resistor divider network (R1/R2), current-limit protection, and chip-enable logic - enabling precise output regulation and fast line/load transient response. Its CMOS architecture achieves ultra-low quiescent current (35 µA typical in ON mode) and standby current (0.1 µA typical).
Designed for operation across −40°C to +85°C, it maintains ±100 ppm/°C output voltage temperature coefficient and 0.05%/V line regulation. Dropout voltage scales with output voltage: 0.20 V typical at 2.8 V / 100 mA, confirmed per Electrical Characteristics table for 2.8 ≤ VOUT ≤ 3.3 V range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.80 V ±2.0% - ensures stable bias for RF front-ends and baseband ICs in GSM/CDMA handsets. |
| Max Output Current | 150 mA - supports moderate-power analog and digital subsystems without thermal derating at TA ≤ 85°C. |
| Dropout Voltage | 0.20 V typical @ 100 mA - enables operation from single-cell Li-ion (3.0 V min) or dual-cell alkaline (3.2 V min) sources. |
| Ripple Rejection | 70 dB @ 1 kHz - suppresses switching noise from DC-DC converters feeding intermediate power rails. |
| Supply Current | 35 µA typical (ON), 0.1 µA typical (OFF) - extends battery life in sleep-mode portable devices. |
| Output Noise | 30 µVrms (10 Hz–100 kHz) - meets low-noise requirements for audio codecs and RF synthesizers. |
| Operating Temp | −40°C to +85°C - qualified for consumer and industrial portable equipment environments. |
Pinout & Package
SOT-23-5 package (Case 1212, Pb-free, tape-and-reel). Compact 2.9 mm × 2.8 mm footprint with 0.95 mm lead pitch - optimized for space-constrained PCB layouts in mobile modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN | Input supply connection | Accepts 2.97 V to 8.0 V input; requires ≥1.0 µF ceramic bypass capacitor near pin for stability. |
| 2: GND | Ground reference | Low-impedance return path for load and internal circuits; must be routed with wide copper pour. |
| 3: CE | Chip enable control | Active-high logic input (VIH ≥ 1.5 V); enables/disables regulator output to reduce system standby power. |
| 4: N/C | No connection | Internally unconnected; must remain floating - no external tie or pull-up/down required. |
| 5: VOUT | Regulated output | Delivers 2.8 V ±2.0%; requires 4.7 µF–10 µF tantalum or ceramic output capacitor with ESR < 1 Ω. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 35 µA typical in active mode - minimizes quiescent drain in always-on battery backup rails. |
| Built-in chip enable | Digital ON/OFF control via CE pin - eliminates need for external MOSFET switch in power sequencing. |
| Low temperature drift | ±100 ppm/°C output coefficient - ensures < ±0.5% total variation over −40°C to +85°C operating range. |
| Fast dynamic response | Stable under 5 µs load transients (30 mA step) - maintains clean supply during burst-mode RF transmission. |
| Pb-free SOT-23-5 package | RoHS-compliant, JEDEC-standard footprint - supports automated assembly and reflow compatibility. |
Applications
| Cellular Phone RF Power Management | Portable Audio Codec Supply |
|---|---|
Use Scenario: Providing clean, regulated 2.8 V bias to power amplifier driver stages and RF transceivers in GSM/CDMA handsets. IC Role / Device Role / Timing Role: Primary LDO regulator for RF signal chain - delivers low-noise, low-ripple DC supply independent of battery voltage sag. Use Value: Enables >70 dB PSRR at 1 kHz, reducing conducted EMI into sensitive receive paths and improving receiver sensitivity by up to 2 dB. |
Use Scenario: Supplying 2.8 V to stereo audio codecs in camcorders and digital voice recorders. IC Role / Device Role / Timing Role: Low-noise analog rail generator - powers DACs, ADCs, and headphone amplifiers with minimal added noise floor. Use Value: 30 µVrms broadband noise ensures SNR > 95 dB, preserving high-fidelity audio playback and recording fidelity. |
| Wireless Headset Baseband IC | Bluetooth LE Sensor Node Core Rail |
Use Scenario: Regulating 2.8 V for baseband processors and Bluetooth radio ICs in compact wireless headsets. IC Role / Device Role / Timing Role: System-level power manager - interfaces with host MCU via CE pin for synchronized sleep/wake cycles. Use Value: 0.1 µA standby current extends battery runtime beyond 100 hours in intermittent-use applications. |
Use Scenario: Delivering 2.8 V to ultra-low-power BLE SoCs and environmental sensors in coin-cell-powered IoT nodes. IC Role / Device Role / Timing Role: Primary core voltage regulator - operates from 3.0 V nominal CR2032 cell with margin down to 2.97 V input. Use Value: 0.20 V dropout allows >90% usable battery capacity extraction before brownout, maximizing node lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP2980IM5-2.8/NOPB | Identical pinout (SOT-23-5), same 2.8 V output, but higher 75 µA typical quiescent current and 0.35 V dropout @ 100 mA. | Less suitable for ultra-low-power sleep modes; acceptable where board space and pin compatibility are primary constraints. | Select when legacy LP2980 design reuse is required and 40 µA higher ISS is tolerable. |
| MCP1700T-2802E/TT | Same 2.8 V output and SOT-23-5 package, but lower 1.6 µA typical quiescent current and 0.6 V dropout @ 250 mA - not rated for 150 mA continuous at high ambient. | Better for micropower sensor nodes; insufficient dropout margin for 3.0 V Li-ion start-up under load. | Select only for sub-50 mA loads where ultra-low ISS dominates performance requirements. |
Compared with LP2980IM5-2.8/NOPB, MC78PC28NTRG offers 53% lower quiescent current and 43% lower dropout - critical for battery longevity and low-input-voltage operation. Against MCP1700T-2802E/TT, MC78PC28NTRG delivers 3× higher output current capability with tighter output tolerance (±2.0% vs ±3.0%), making it superior for RF and audio applications demanding precision and drive strength.
Availability
MC78PC28NTRG is available at Aetrix Electronics and suitable for cellular phone RF power management, portable audio codec supply, wireless headset baseband ICs, and Bluetooth LE sensor node core rails requiring stable component supply across production volumes.
Supply support for MC78PC28NTRG 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 power management, analog, and sensing solutions for automotive, industrial, and portable electronics.
The MC78PC00 series was developed specifically for low-noise, low-quiescent-current power regulation in hand-held communication equipment - emphasizing fast transient response, miniature packaging, and battery-life optimization.
FAQ
What is the maximum input voltage rating for the MC78PC28NTRG?
The MC78PC28NTRG has an absolute maximum input voltage (VIN) rating of 9.0 V, but its recommended operating input voltage range is up to 8.0 V per Electrical Characteristics. Exceeding 8.0 V may increase power dissipation beyond the 250 mW package limit, especially at elevated ambient temperatures. Always verify thermal margin using the device's thermal resistance (θJA ≈ 200°C/W for SOT-23-5) and actual load conditions in the final PCB layout.
Does the MC78PC28NTRG require an external capacitor on the CE pin?
No, the MC78PC28NTRG does not require an external capacitor on the CE pin. The CE input is a CMOS-compatible digital control terminal with VIH ≥ 1.5 V and VIL ≤ 0.25 V; it draws negligible current (< 100 nA) and functions reliably with direct MCU GPIO connection. Adding capacitance risks slowing enable/disable timing and is unnecessary for noise immunity given the device's internal hysteresis and filtering.
Can the MC78PC28NTRG be used with ceramic output capacitors?
Yes, the MC78PC28NTRG supports ceramic output capacitors, but stability requires careful selection: use 4.7 µF–10 µF X5R/X7R types with ESR between 0.1 Ω and 1.0 Ω. Avoid ultra-low-ESR ceramics (< 0.05 Ω) without series resistance, as they can cause oscillation. The datasheet confirms stable operation with 10 µF ceramic in Figure 49 and Application Hints on page 12.
What is the output voltage accuracy specification for MC78PC28NTRG over temperature?
The MC78PC28NTRG guarantees ±2.0% initial output voltage accuracy at 25°C, and its output voltage temperature coefficient is ±100 ppm/°C. Over the full −40°C to +85°C operating range, total output variation remains within ±2.5% - calculated as ±2.0% initial tolerance plus ±0.35% drift (125°C × 100 ppm/°C = ±1.25%, halved for symmetric range), verified in Figures 17–20 of the datasheet.
Is the MC78PC28NTRG pin-compatible with the LP2980 family?
Yes, the MC78PC28NTRG features identical pinout to the LP2980/1/2 series in SOT-23-5 packages, as explicitly stated in the "Features" section of the datasheet. Pin 1 = VIN, Pin 2 = GND, Pin 3 = CE, Pin 4 = N/C, Pin 5 = VOUT - enabling drop-in replacement in existing LP2980 designs where improved dropout and lower quiescent current are beneficial.
MC78PC28NTRG 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):
- 2.8V
- 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
MC78PC28NTRG FAQ
1.How can I place an order for MC78PC28NTRG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC78PC28NTRG 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 MC78PC28NTRG reliable?
The price and inventory of MC78PC28NTRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC78PC28NTRG is usually 5 days.
3.What payment methods are accepted for MC78PC28NTRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC78PC28NTRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC78PC28NTRG?
MC78PC28NTRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC78PC28NTRG 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 MC78PC28NTRG?
For technical support, including MC78PC28NTRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC78PC28NTRG requirements.
6.How does Aetrix verify that MC78PC28NTRG is sourced from the original manufacturer or authorized distributors?
All MC78PC28NTRG 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 MC78PC28NTRG meets industry standards.
7.What is the process for return or replacement of MC78PC28NTRG?
All MC78PC28NTRG units undergo pre-shipment inspection (PSI). If there is an issue with MC78PC28NTRG, 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 MC78PC28NTRG part is unused and in its original packaging.
Return procedure for MC78PC28NTRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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