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onsemi NCP603SN280T1G
- Part No.:
- NCP603SN280T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP603SN280T1G.pdf
- Description:
- IC REG LINEAR 2.8V 300MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,453
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Product details
Overview
NCP603SN280T1G from onsemi is a fixed-output 2.8 V, 300 mA low-dropout (LDO) linear regulator in TSOP-5 package, featuring 75 mV typical dropout at 150 mA, 50 µVRMS output noise (10 Hz–100 kHz), and fast 15 µs enable turn-on time. It is designed for portable battery-powered systems requiring stable, low-noise power for RF stages and audio subsystems.
For engineers reviewing the NCP603SN280T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 300 mA load, thermal shutdown threshold (175 °C), ESD robustness (HBM 3.5 kV), and compatibility with ceramic output capacitors down to 1.0 µF without minimum ESR requirements.
Technical Context
The NCP603SN280T1G implements a CMOS-based LDO architecture with internal current limiting and thermal shutdown. Its fixed 2.8 V output is set by laser-trimmed on-die resistors, eliminating external feedback components. The device operates across a 1.75 V to 6.0 V input range and maintains regulation down to 2.8 V + 75 mV (typ.) at 150 mA.
Enable control is provided via a dedicated logic-level input (VTH(HI) = 0.9 V, VTH(LO) = 0.4 V) with sub-1 µA bias current. Ground current remains stable at 145–180 µA over full load (1–300 mA) and temperature (−40 °C to 125 °C), supporting low-power standby operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2% (1.0–150 mA load); ±3% (1.0–300 mA), enabling precise biasing of 2.8 V logic and analog circuits |
| Max Output Current | 300 mA continuous, supporting moderate-power microcontrollers and sensor interfaces without external boost |
| Dropout Voltage | 75 mV typ. at 150 mA; 157 mV typ. at 300 mA (2.8 V output), allowing operation from single-cell Li-ion (3.0 V min) or two-cell alkaline |
| Noise Voltage | 50 µVRMS (10 Hz–100 kHz, no bypass cap), suitable for noise-sensitive VCOs and RF receivers without added filtering |
| Enable Response | 15 µs turn-on time, enabling rapid power sequencing in portable instrumentation and audio players |
| ESD Protection | HBM 3.5 kV / MM 200 V, providing robust handling during board assembly and field operation |
| Operating Temp | −40 °C to +125 °C ambient, validated for automotive cabin and industrial edge computing environments |
Pinout & Package
TSOP-5 (Case 483, 3.00 × 1.50 × 0.95 mm, 0.95 mm pitch) surface-mount package with exposed pad not electrically connected. Pin 1 is marked with dot or bevel; top-view orientation follows JEDEC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Positive power supply input | Accepts 1.75–6.0 V; requires local 1.0 µF ceramic decoupling capacitor placed adjacent to pin |
| 2 - GND | Power ground and substrate reference | Must connect to low-impedance PCB ground plane; serves as return path for all internal currents |
| 3 - ENABLE | Logic-level enable control input | Pull ≥0.9 V to activate regulator; pull ≤0.4 V to enter <1 µA shutdown; tie to VIN if unused |
| 4 - NC | No connection (fixed-voltage version) | Not bonded internally; PCB trace may be routed but must remain unconnected per datasheet Note 1 |
| 5 - VOUT | Regulated 2.8 V output | Delivers up to 300 mA; supports 1.0–10 µF ceramic output capacitors without stability concerns |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 50 µVRMS output noise without external bypass capacitor, reducing BOM count and PCB area vs. competing LDOs |
| Fast enable response | 15 µs output rise time enables tight power sequencing in multi-rail systems and real-time audio processing paths |
| Wide input range | 1.75–6.0 V operation supports direct connection to USB, Li-ion, and dual-cell battery sources without pre-regulation |
| Thermal protection | 175 °C junction shutdown with 10 °C hysteresis prevents permanent damage during sustained overload or poor heatsinking |
| Pb-free packaging | RoHS-compliant TSOP-5 (SN suffix) with MSL1 rating, compatible with standard lead-free reflow profiles |
Applications
| SMPS Post-Regulation | Noise-Sensitive RF Circuits |
|---|---|
Use Scenario: Clean 2.8 V rail generation after a switching DC-DC converter in a wireless module. IC Role / Device Role / Timing Role: Low-noise post-regulator suppressing switching ripple and harmonics from upstream buck converter. Use Value: 50 µVRMS noise ensures minimal phase noise degradation in 2.4 GHz transceivers and GPS front-ends. | Use Scenario: Powering VCOs, LNA bias networks, and mixer cores in handheld radios. IC Role / Device Role / Timing Role: Ultra-low-noise voltage source maintaining signal integrity in high-frequency analog signal chains. Use Value: Fixed 2.8 V output eliminates resistor-divider error and drift, improving long-term frequency stability. |
| Portable Audio Players | Camcorders & Digital Cameras |
Use Scenario: Supplying DACs, headphone amplifiers, and codec I/O rails in battery-powered music players. IC Role / Device Role / Timing Role: Efficient, quiet power delivery enabling >20-hour playback while minimizing audible hiss. Use Value: 75 mV dropout at 150 mA extends usable battery life by maintaining regulation until cell voltage drops to ~2.875 V. | Use Scenario: Providing stable 2.8 V for image sensor analog front-ends and autofocus motor drivers. IC Role / Device Role / Timing Role: High-PSRR (62 dB @ 120 Hz) regulator rejecting noise from flash charging and motor commutation. Use Value: Fast 15 µs enable allows synchronized power-up with sensor initialization sequences, reducing boot latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 250 mA max output; 175 mV dropout at 250 mA; 30 µVRMS noise; SOT-23-3 package (no enable) | Lacks enable pin and thermal shutdown; lower current capacity limits use in higher-power camera modules | Select when enable control and 300 mA headroom are unnecessary and ultra-low noise is prioritized |
| Torex XC6206P282MR-G | 150 mA max output; 160 mV dropout at 150 mA; 40 µVRMS noise; SOT-23-3 (no enable) | No enable function; lower current rating restricts use to low-power sensors and memory I/O | Choose for space-constrained designs where 150 mA suffices and footprint minimization outweighs feature set |
Compared with MCP1700T-2802E/TT and XC6206P282MR-G, the NCP603SN280T1G delivers 300 mA output with integrated enable and thermal protection in a 5-pin TSOP package-enabling robust, sequenced power delivery in portable imaging and RF systems where reliability and headroom matter.
Availability
NCP603SN280T1G is available at Aetrix Electronics and suitable for portable computing, handheld instrumentation, and camcorder power management requiring stable component supply across extended product lifecycles.
Supply support for NCP603SN280T1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP603 series belongs to onsemi's high-performance LDO portfolio, engineered specifically for battery-powered portable electronics demanding low noise, fast enable response, and wide-input-voltage operation with minimal external components.
FAQ
What is the maximum input voltage rating for the NCP603SN280T1G?
The NCP603SN280T1G has an absolute maximum input voltage of 6.5 V. However, its recommended operating input voltage range is 1.75 V to 6.0 V. Exceeding 6.0 V may degrade long-term reliability even if within absolute maximum ratings, and operation below 1.75 V or below (2.8 V + dropout) will cause loss of regulation. Always maintain VIN ≥ VOUT + VDO under actual load conditions.
Does the NCP603SN280T1G require an external bypass capacitor for low-noise operation?
No, the NCP603SN280T1G achieves 50 µVRMS output noise (10 Hz–100 kHz) without any external bypass capacitor. Unlike many low-noise LDOs that mandate a 10 nF–100 nF noise-reduction capacitor, this device integrates internal noise suppression circuitry-reducing bill-of-materials cost and PCB layout complexity while maintaining fast 15 µs startup.
What is the function of Pin 4 (ADJ/NC) on the NCP603SN280T1G?
Pin 4 on the NCP603SN280T1G is a true no-connect (NC) terminal, as confirmed in the datasheet's PIN FUNCTION DESCRIPTION table and MARKING DIAGRAM note. It is not bonded internally and must remain unconnected on the PCB. This distinguishes it from adjustable versions (e.g., NCP603SNADJT1G), where Pin 4 serves as the ADJ input for external resistor feedback.
How does thermal shutdown operate in the NCP603SN280T1G?
The NCP603SN280T1G incorporates an internal thermal shutdown circuit that activates at approximately 175 °C junction temperature, disabling the output to prevent damage. It features 10 °C hysteresis, so the device automatically resumes regulation once the junction cools to ~165 °C. This protection operates independently of enable state and is validated per JEDEC JESD78 latchup testing.
Can the NCP603SN280T1G be used with ceramic output capacitors smaller than 1.0 µF?
No-the datasheet specifies a minimum output capacitance of 1.0 µF for stable operation. While the NCP603SN280T1G is stable with ceramic capacitors and does not require minimum ESR, using less than 1.0 µF risks violating the stability margin defined in Figure 28 and may cause oscillation or poor transient response under load steps. Always use ≥1.0 µF X5R/X7R ceramic capacitors placed close to Pins 2 (GND) and 5 (VOUT).
NCP603SN280T1G 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):
- 6V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.23V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- -
- PSRR:
- 62dB ~ 38dB (120Hz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Transient Voltage
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP603SN280T1G FAQ
1.How can I place an order for NCP603SN280T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP603SN280T1G 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 NCP603SN280T1G reliable?
The price and inventory of NCP603SN280T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP603SN280T1G is usually 5 days.
3.What payment methods are accepted for NCP603SN280T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP603SN280T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP603SN280T1G?
NCP603SN280T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP603SN280T1G 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 NCP603SN280T1G?
For technical support, including NCP603SN280T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP603SN280T1G requirements.
6.How does Aetrix verify that NCP603SN280T1G is sourced from the original manufacturer or authorized distributors?
All NCP603SN280T1G 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 NCP603SN280T1G meets industry standards.
7.What is the process for return or replacement of NCP603SN280T1G?
All NCP603SN280T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP603SN280T1G, 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 NCP603SN280T1G part is unused and in its original packaging.
Return procedure for NCP603SN280T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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