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onsemi NCP603SN500T1G
- Part No.:
- NCP603SN500T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP603SN500T1G.pdf
- Description:
- IC REG LINEAR 5V 300MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,068
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Product details
Overview
NCP603SN500T1G from onsemi is a fixed-output 5.0 V, 300 mA low-dropout (LDO) linear regulator in TSOP-5 package, designed for portable battery-powered systems requiring low noise (50 µVRMS), fast enable response (15 µs), and high ESD robustness (HBM 3.5 kV). It delivers stable regulation across −40 °C to +125 °C ambient with <±3% output voltage accuracy and supports SMPS post-regulation in noise-sensitive RF/audio circuits.
For engineers reviewing the NCP603SN500T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 300 mA (max 125 mV for 5.0 V output), thermal shutdown threshold (175 °C), enable input logic thresholds (0.9 V high / 0.4 V low), and compatibility with low-ESR ceramic output capacitors ≥1.0 µF.
Technical Context
The NCP603SN500T1G implements a CMOS-based LDO architecture with internal current limiting (300–650 mA), thermal shutdown (175 °C), and an integrated overshoot clamp circuit that activates at ~20 mV above nominal output to suppress load-release transients. Its pass element is optimized for low quiescent ground current (145–180 µA under load) and minimal dropout across temperature.
It operates over a 1.75–6.0 V input range and maintains regulation down to 1.75 V input for 5.0 V output (VIN ≥ VOUT + VDO). The enable function provides true shutdown with sub-1 µA disable current, and the fixed 5.0 V version uses Pin 4 as NC (no connection), distinguishing it from the adjustable ADJ variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±3% over −40 °C to +125 °C and 1.0–300 mA load; ensures stable core/peripheral rail in portable computing. |
| Max Output Current | 300 mA continuous; supports moderate-power microcontrollers, sensors, and audio codecs without external heatsinking. |
| Dropout Voltage | 75 mV typical / 125 mV max at 300 mA (VOUT = 5.0 V); enables operation from single-cell Li-ion (3.0–4.2 V) with margin. |
| Noise Voltage | 50 µVRMS (10 Hz–100 kHz, no bypass cap); eliminates need for external noise-reduction capacitors in VCO/RF supply rails. |
| Enable Threshold | Logic-high threshold ≥0.9 V, logic-low ≤0.4 V; compatible with 1.8 V/3.3 V GPIO without level-shifting. |
| ESD Protection | HBM 3.5 kV / MM 200 V; meets AEC-Q100-002/-003 for robust handling in manufacturing and end-equipment assembly. |
| Operating Temp | −40 °C to +125 °C ambient; qualified for industrial and extended-temperature portable applications. |
Pinout & Package
Package: TSOP-5 (Case 483), Pb-free, 3.00 × 1.50 × 0.95 mm, 0.95 mm pitch. Thermal resistance RJA = 215 °C/W on 1 oz copper (645 mm²).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Positive power supply input | Accepts 1.75–6.0 V; must be decoupled with ≥1.0 µF ceramic capacitor near pin for line transient immunity. |
| 2 - GND | Power ground and substrate reference | Low-impedance return path; requires solid PCB ground plane to minimize noise coupling and thermal resistance. |
| 3 - ENABLE | Digital control input | Pull ≥0.9 V to enable regulator; pull ≤0.4 V to enter ultra-low-IDIS (<1 µA) shutdown mode. |
| 4 - NC | No connection (fixed-voltage version) | Not bonded internally; PCB trace may be omitted or left floating-no routing or termination required. |
| 5 - VOUT | Regulated 5.0 V output | Delivers up to 300 mA; requires ≥1.0 µF ceramic output capacitor placed adjacent to pin for stability and load transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise regulation | 50 µVRMS (10 Hz–100 kHz) without external bypass capacitor-reduces BOM count and board space in RF/analog sections. |
| Fast enable turn-on | 15 µs typical rise time from ENABLE high to VOUT regulation-enables precise power sequencing in multi-rail systems. |
| Thermal & current protection | Integrated thermal shutdown (175 °C, 10 °C hysteresis) and current limit (300–650 mA)-prevents damage during overload or poor heatsinking. |
| Low-quiescent ground current | 145–180 µA over full load and temperature range-extends battery life in always-on portable instrumentation. |
| Wide input voltage range | 1.75–6.0 V operation-supports direct connection to Li-ion, Li-poly, or regulated DC-DC outputs without pre-regulation. |
Applications
| SMPS Post-Regulation | Noise-Sensitive RF Circuits |
|---|---|
Use Scenario: Clean 5.0 V rail derived from a switching converter for mixed-signal SoCs or ADC/DAC subsystems. IC Role / Device Role / Timing Role: Final-stage LDO providing ripple rejection >62 dB at 120 Hz and low broadband noise to preserve signal integrity. Use Value: Eliminates need for additional LC filtering; PSRR and noise specs directly enable <12-bit ENOB in precision data acquisition. |
Use Scenario: Powering VCOs, PLLs, or RF front-end amplifiers in handheld radios or IoT transceivers. IC Role / Device Role / Timing Role: Ultra-low-noise 5.0 V bias source minimizing phase noise degradation and spurious emissions. Use Value: 50 µVRMS noise floor prevents jitter multiplication in clock paths and maintains EVM compliance in 2.4 GHz ISM-band links. |
| Portable Audio Players | Industrial Hand-Held Instruments |
Use Scenario: Supplying DACs, headphone amps, and codec I/O in battery-operated music players. IC Role / Device Role / Timing Role: Low-noise, low-dropout regulator enabling efficient use of declining Li-ion voltage (3.0–4.2 V). Use Value: 75 mV dropout at 300 mA allows >90% battery utilization; fast enable supports instant-on user experience. |
Use Scenario: Powering microcontroller cores, display drivers, and sensor interfaces in field-deployed test meters. IC Role / Device Role / Timing Role: Robust 5.0 V supply with −40 °C to +125 °C operation and 3.5 kV HBM ESD for harsh environments. Use Value: Extended temperature rating and ESD hardening reduce field failure rates in uncontrolled industrial settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-5002E/MB | 250 mA max output, 175 mV dropout at 250 mA, 30 µVRMS noise, SOT-23-3 (no enable) | Lacks enable pin and thermal shutdown; lower current capacity limits use in higher-load peripherals. | Select only if enable control and 300 mA headroom are unnecessary and ultra-low noise is prioritized over protection features. |
| TLS850B2TE/V33 | Automotive-grade (AEC-Q100), 500 mA, 120 mV dropout, integrated watchdog and reset-TSOP-6 package | Includes safety features (reset, watchdog) and automotive qualification; larger footprint and higher cost than NCP603SN500T1G. | Choose when functional safety (ASIL-B) or automotive qualification is mandatory; not drop-in due to pin count and enable behavior differences. |
Compared with MCP1700T-5002E/MB and TLS850B2TE/V33, the NCP603SN500T1G offers balanced performance: higher current (300 mA) and integrated enable/shutdown than the MCP1700, while being simpler and lower-cost than the automotive TLS850B2 for industrial/portable designs where safety certification is not required.
Availability
NCP603SN500T1G is available at Aetrix Electronics and suitable for portable computing, noise-sensitive RF modules, and industrial hand-held instrumentation requiring stable component supply despite its discontinued status per onsemi's official notice.
Supply support for NCP603SN500T1G 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 focused on energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP603 series was developed specifically for portable battery-powered applications demanding high-performance LDO regulation-low noise, fast enable, wide input range, and robust ESD-within compact TSOP-5 packaging.
FAQ
Is NCP603SN500T1G still in production?
No-NCP603SN500T1G is officially marked as discontinued by onsemi per the February 2026 revision of the NCP603/D datasheet (page 13 and revision history). However, Aetrix Electronics maintains legacy inventory with full traceability and supports design-in continuity through controlled allocation and lifecycle coordination.
What is the correct pin configuration for NCP603SN500T1G?
The NCP603SN500T1G uses the TSOP-5 package with fixed 5.0 V output: Pin 1 = VIN, Pin 2 = GND, Pin 3 = ENABLE, Pin 4 = NC (no connection), Pin 5 = VOUT. Pin 4 must remain unconnected-no pull-up, pull-down, or routing is required or recommended.
Can NCP603SN500T1G operate from a 3.3 V input?
Yes-NCP603SN500T1G supports input voltages as low as 1.75 V, but for 5.0 V output, minimum input is VOUT + VDO. At 300 mA, VDO ≤125 mV, so 3.3 V input is sufficient (3.3 V > 5.0 V + 0.125 V is false; correction: 3.3 V < 5.0 V, thus **cannot regulate 5.0 V from 3.3 V**). Valid inputs must be ≥5.125 V to sustain 5.0 V output at full load.
Does NCP603SN500T1G require an external bypass capacitor for noise reduction?
No-NCP603SN500T1G achieves 50 µVRMS output noise (10 Hz–100 kHz) without any external bypass capacitor. Unlike many low-noise LDOs, it integrates internal noise suppression, eliminating the need for a separate 10 nF–100 nF capacitor and simplifying layout.
What thermal derating applies to NCP603SN500T1G at 85 °C ambient?
At TA = 85 °C, maximum power dissipation for NCP603SN500T1G is PDMAX = (TJ(MAX) − TA) / RJA = (125 °C − 85 °C) / 215 °C/W ≈ 186 mW. With 5.0 V output and 300 mA load, worst-case dropout (125 mV) yields PD = 125 mV × 300 mA = 37.5 mW-well within safe operating area even at elevated ambient.
NCP603SN500T1G 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):
- 5V
- 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
NCP603SN500T1G FAQ
1.How can I place an order for NCP603SN500T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP603SN500T1G 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 NCP603SN500T1G reliable?
The price and inventory of NCP603SN500T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP603SN500T1G is usually 5 days.
3.What payment methods are accepted for NCP603SN500T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP603SN500T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP603SN500T1G?
NCP603SN500T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP603SN500T1G 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 NCP603SN500T1G?
For technical support, including NCP603SN500T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP603SN500T1G requirements.
6.How does Aetrix verify that NCP603SN500T1G is sourced from the original manufacturer or authorized distributors?
All NCP603SN500T1G 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 NCP603SN500T1G meets industry standards.
7.What is the process for return or replacement of NCP603SN500T1G?
All NCP603SN500T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP603SN500T1G, 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 NCP603SN500T1G part is unused and in its original packaging.
Return procedure for NCP603SN500T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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