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onsemi NCP500SN27T1
- Part No.:
- NCP500SN27T1
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP500SN27T1.pdf
- Description:
- IC REG LINEAR 2.7V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,644
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Product details
Overview
NCP500SN27T1 from onsemi is a fixed-output, low-noise, low-dropout linear regulator delivering 2.7 V at up to 150 mA. It features ultra-low dropout (170 mV at 150 mA), 50 µVRMS output noise without bypass capacitor, and fast 20 µs enable turn-on time. Designed for noise-sensitive RF stages and portable battery-powered systems requiring stable, clean power under tight input headroom.
For engineers reviewing the NCP500SN27T1 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at full load, RMS noise performance across 10 Hz–100 kHz, enable logic compatibility down to 1.0 V, thermal shutdown behavior, and DFN 2×2.2 mm package suitability for space-constrained PCB layouts.
Technical Context
The NCP500SN27T1 uses a PMOS pass transistor architecture enabling ultra-low dropout and eliminating the need for an external noise-bypass capacitor. Its internal voltage reference, error amplifier, and protection circuits (current limit and thermal shutdown) operate independently of output capacitor ESR, supporting stable regulation with 1.0 µF ceramic capacitors.
Enable functionality is implemented with a logic-compatible input threshold (0.9 V high / 0.15 V low), allowing direct interfacing with 1.0 V logic families. The device maintains ±2.5% output accuracy over −40 °C to +85 °C and supports input voltages from 1.8 V to 6.0 V - critical for single-cell Li-ion and multi-cell alkaline/battery-backed applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.7 V ±2.5% (2.633 V to 2.768 V) across −40 °C to +85 °C and 1–150 mA load - ensures stable biasing for RF ICs and precision analog circuitry. |
| Dropout Voltage | 170 mV at 150 mA (typical), 260 mV max - enables operation with only 2.97 V input, supporting single-cell Li-ion (3.0–4.2 V) and 3.3 V rail post-regulation. |
| Output Noise | 50 µVRMS (10 Hz–100 kHz, no bypass cap) - eliminates need for external noise filter, preserving signal integrity in VCOs and LNA stages. |
| Enable Threshold | 0.9 V (logic high turn-on), 0.15 V (logic low turn-off) - compatible with 1.0 V I/O standards and low-power microcontroller GPIOs. |
| Quiescent Current | 185 µA at 150 mA load (typical) - minimizes standby power loss in always-on subsystems like real-time clocks or sensor interfaces. |
| Thermal Shutdown | Activates at ~160 °C junction temperature - protects against sustained overload or poor PCB thermal design without external supervision. |
| Package | DFN 2×2.2 mm, 6-pin (Case 506BA) - compact footprint with exposed thermal pad for enhanced heat dissipation in dense layouts. |
Pinout & Package
Package: DFN 2×2.2 mm, 6-pin, exposed thermal pad (Case 506BA). Pin 6 is GND and thermally connected to the die paddle for improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Enable | Active-high digital control input; connect to Vin if unused to ensure permanent enable state. |
| 2 | GND | Power ground reference; electrically and thermally tied to exposed pad - must be soldered to large copper pour. |
| 3 | Vin | Unregulated input supply (1.8–6.0 V); requires ≥1.0 µF ceramic decoupling placed adjacent to pin. |
| 4 | Vout | Regulated 2.7 V output; minimum 1.0 µF ceramic capacitor required for stability and transient response. |
| 5 | N/C | No internal connection - left floating; not bonded or used internally. |
| 6 | GND | Second ground terminal, directly connected to exposed thermal pad - critical for thermal management and noise rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 170 mV at 150 mA enables use with marginal input rails (e.g., aging batteries or post-DC/DC outputs). |
| No external bypass capacitor needed | 50 µVRMS noise achieved via internal low-noise architecture - reduces BOM count and board area vs. traditional LDOs. |
| 1.0 V logic-compatible enable | 0.9 V turn-on threshold allows direct drive from modern ultra-low-voltage MCUs without level-shifting. |
| Stable with 1.0 µF ceramic output cap | Eliminates ESR dependency - simplifies layout and improves reliability versus tantalum or polymer alternatives. |
| Integrated thermal & current protection | Auto-recovering shutdown at ~160 °C and current limiting prevent damage during fault conditions without external components. |
Applications
| RF Power Amplifier Biasing | VCO and PLL Reference Supply |
|---|---|
Use Scenario: Providing clean, low-noise DC bias to GaAs or SiGe RF power amplifiers in cellular handsets and IoT transceivers. IC Role / Device Role / Timing Role: Low-dropout voltage regulator supplying stable 2.7 V bias under dynamic load modulation. Use Value: 50 µVRMS noise prevents phase jitter degradation and adjacent-channel leakage in narrow-band RF systems. |
Use Scenario: Delivering ultra-stable supply to voltage-controlled oscillators and phase-locked loop charge pumps in wireless baseband ICs. IC Role / Device Role / Timing Role: Precision low-noise LDO acting as dedicated reference rail for frequency synthesis blocks. Use Value: ±2.5% output accuracy and <10 mV load regulation maintain oscillator center frequency stability across temperature and load variation. |
| Portable Medical Sensor Front-End | Industrial Hand-Held Instrumentation |
Use Scenario: Powering low-power analog front-ends (AFE) in wearable ECG or pulse oximetry sensors operating from coin-cell batteries. IC Role / Device Role / Timing Role: Primary power regulator for signal-conditioning circuitry requiring minimal quiescent current and low noise. Use Value: 185 µA quiescent current extends battery life; 170 mV dropout maximizes usable battery voltage range down to 2.87 V. |
Use Scenario: Regulating supply for microcontroller-based test equipment (e.g., multimeters, thermal imagers) powered by rechargeable Li-ion packs. IC Role / Device Role / Timing Role: Main system LDO providing 2.7 V to mixed-signal SoCs and display drivers. Use Value: Fast 20 µs enable response supports rapid power cycling between measurement modes, reducing average system power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2702E/TT | 250 mV dropout at 150 mA; 30 µVRMS noise; SOT-23-5 package; no enable pin. | Lacks enable control and thermal shutdown; lower noise but higher dropout limits usable input range. | Select when enable functionality is unnecessary and board space permits larger SOT-23 footprint. |
| TLS820B27T1 | Automotive-grade AEC-Q100 qualified; 200 mV dropout; integrated watchdog and reset; 50 µVRMS noise. | Designed for automotive body electronics; includes safety features not required in consumer portables. | Choose for automotive applications requiring functional safety compliance and extended temperature support (−40 °C to +150 °C). |
Compared with MCP1700T-2702E/TT and TLS820B27T1, the NCP500SN27T1 offers the lowest dropout (170 mV) and integrated enable with 1.0 V logic compatibility - making it optimal for space-constrained, battery-sensitive designs where rapid power sequencing and minimal input headroom are critical.
Availability
NCP500SN27T1 is available at Aetrix Electronics and suitable for RF front-end biasing, portable medical sensor power, and industrial handheld instrumentation requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP500SN27T1 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP500 series belongs to onsemi's precision analog power management portfolio, engineered specifically for portable and noise-critical systems demanding ultra-low dropout, low quiescent current, and high PSRR without external compensation.
FAQ
What is the maximum input voltage rating for the NCP500SN27T1?
The NCP500SN27T1 has an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. For inputs exceeding 6.0 V, a pre-regulator stage (e.g., resistive divider or switching pre-buck) must be used upstream of the NCP500SN27T1 to ensure safe operation within its specified range.
Does the NCP500SN27T1 require an external bypass capacitor to achieve its rated 50 µVRMS noise performance?
No, the NCP500SN27T1 achieves its specified 50 µVRMS output noise (10 Hz–100 kHz) without any external bypass capacitor. This is enabled by its internal low-noise architecture and PMOS pass element - eliminating BOM cost, board area, and startup delay associated with traditional bypass caps.
Can the NCP500SN27T1 be used with ceramic output capacitors smaller than 1.0 µF?
No. The NCP500SN27T1 requires a minimum 1.0 µF ceramic output capacitor for guaranteed stability across all operating conditions. Using smaller values may cause oscillation or degraded transient response. Larger values (e.g., 2.2–10 µF) improve load regulation and noise rejection but are not mandatory.
What is the thermal resistance (RJA) of the NCP500SN27T1 in its DFN 2×2.2 mm package?
The NCP500SN27T1 in the DFN 2×2.2 mm package (Case 506BA) has a typical junction-to-ambient thermal resistance (RJA) of 225 °C/W when mounted on a standard 4-layer PCB with adequate copper pour connected to the exposed thermal pad. This value assumes proper soldering of Pin 6 and the thermal pad to a ≥1 cm² ground plane.
Is the NCP500SN27T1 pin-compatible with other variants in the NCP500 family, such as NCP500SN33T1?
Yes, all NCP500 variants in the DFN 2×2.2 mm package (e.g., NCP500SN27T1, NCP500SN33T1) share identical pinout, package dimensions, and thermal pad layout. Output voltage is set internally, so swapping variants requires only firmware or schematic update - no PCB redesign is needed.
NCP500SN27T1 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):
- 2.7V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.26V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- 300 µA
- PSRR:
- 62dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP500SN27T1 FAQ
1.How can I place an order for NCP500SN27T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP500SN27T1 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 NCP500SN27T1 reliable?
The price and inventory of NCP500SN27T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP500SN27T1 is usually 5 days.
3.What payment methods are accepted for NCP500SN27T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP500SN27T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP500SN27T1?
NCP500SN27T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP500SN27T1 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 NCP500SN27T1?
For technical support, including NCP500SN27T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP500SN27T1 requirements.
6.How does Aetrix verify that NCP500SN27T1 is sourced from the original manufacturer or authorized distributors?
All NCP500SN27T1 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 NCP500SN27T1 meets industry standards.
7.What is the process for return or replacement of NCP500SN27T1?
All NCP500SN27T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP500SN27T1, 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 NCP500SN27T1 part is unused and in its original packaging.
Return procedure for NCP500SN27T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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