My Inquiry
My Account
onsemi NCP500SN185T1G
- Part No.:
- NCP500SN185T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP500SN185T1G.pdf
- Description:
- IC REG LINEAR 1.85V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,963
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NCP500SN185T1G from onsemi is a fixed-output, low-noise, low-dropout linear regulator delivering 1.85 V at up to 150 mA. It features an ultra-low dropout voltage of 170 mV at full load, 50 µV RMS noise (10 Hz–100 kHz) without bypass capacitor, and fast 20 µs enable turn-on time. Designed for noise-sensitive RF and portable battery-powered systems, it operates from 1.8 V to 6.0 V input and maintains ±2.5% output accuracy over −40°C to +85°C.
For engineers reviewing the NCP500SN185T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance at 150 mA, enable logic compatibility with 1.0 V CMOS, thermal shutdown behavior, RMS noise specification, and DFN 2×2.2 mm package footprint constraints.
Technical Context
The NCP500SN185T1G uses a PMOS pass transistor architecture enabling ultra-low dropout and eliminating the need for external noise-bypass capacitors. Its internal error amplifier and voltage reference achieve high line/load regulation (<10 mV line, <45 mV load) and maintain stable output under fast load transients.
Enable functionality is implemented with a dedicated input that accepts 1.0 V logic-high signals and features sub-100 nA bias current. Thermal shutdown activates at ~160°C, and current limiting protects against short-circuit conditions without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.85 V ±2.5% (guaranteed across −40°C to +85°C, 1–150 mA load) |
| Max Output Current | 150 mA continuous (with thermal derating above ambient) |
| Dropout Voltage | 170 mV at 150 mA (enables operation with Vin as low as 2.02 V while regulating 1.85 V) |
| RMS Noise | 50 µV (10 Hz–100 kHz, no bypass capacitor required - reduces BOM count) |
| Enable Threshold | 0.9 V logic-high turn-on; 0.15 V logic-low turn-off (direct interface with 1.0 V logic families) |
| Quiescent Current | 175 µA at 150 mA load (low ground current improves battery life in standby) |
| Ripple Rejection | 62 dB at 1 kHz (effective suppression of switching noise from upstream SMPS) |
Pinout & Package
Package: DFN 2×2.2 mm, 6-pin, exposed thermal pad (Case 506BA). Pin 6 is GND and shares thermal pad connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive power supply input (1.8–6.0 V); requires 1.0 µF ceramic decoupling close to pin |
| 2 | GND | Power ground reference; connects to thermal pad for heat dissipation |
| 3 | Enable | Active-high digital control; pulled to Vin if unused; slew rate >10 mV/s required |
| 4 | Vout | Regulated 1.85 V output; minimum 1.0 µF ceramic capacitor required for stability |
| 5 | N/C | No internal connection; must be left floating or grounded (not recommended) |
| 6 | GND | Dedicated ground terminal tied to thermal pad; improves thermal resistance (RJA = 225°C/W) |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 170 mV @ 150 mA enables single-cell Li-ion (2.8–4.2 V) and NiMH (2.4–3.0 V) operation |
| No external bypass cap | 50 µV RMS noise achieved via internal architecture - eliminates one passive component and associated layout area |
| Fast enable response | 20 µs turn-on time supports dynamic power sequencing in multi-rail systems |
| 1.0 V logic-compatible enable | Operates directly with modern low-voltage I/O standards (e.g., 1.2 V/1.0 V core logic) without level shifting |
| Thermal & current protection | Internal shutdown at ~160°C and foldback current limit prevent damage during overload or poor heatsinking |
Applications
| RF Power Amplifier Bias | VCO Supply Regulation |
|---|---|
Use Scenario: Providing clean, stable bias to GaAs pHEMT or SiGe HBT RF power amplifiers in cellular front-end modules. IC Role / Device Role / Timing Role: Low-noise LDO supplying 1.85 V bias rail; rejects switching noise from adjacent DC/DC converters. Use Value: 50 µV RMS noise prevents phase noise degradation and EVM drift in LTE/5G transmit paths. | Use Scenario: Powering voltage-controlled oscillators in PLL-based frequency synthesizers for wireless transceivers. IC Role / Device Role / Timing Role: Ultra-stable 1.85 V supply minimizing supply-induced jitter and frequency pulling. Use Value: ±2.5% output accuracy and <10 mV load regulation ensure consistent VCO tuning slope and phase noise floor. |
| Portable Medical Sensor Node | Industrial IoT Edge Controller |
Use Scenario: Regulating power for low-power analog front-ends (AFE) in handheld ECG or pulse oximetry devices. IC Role / Device Role / Timing Role: Primary 1.85 V supply for precision ADCs, op-amps, and low-noise signal conditioning circuits. Use Value: 170 mV dropout extends usable battery life by enabling operation down to 2.02 V input from coin-cell or Li-ion sources. | Use Scenario: Powering microcontroller I/O banks and isolated sensor interfaces in battery-backed industrial gateways. IC Role / Device Role / Timing Role: Secondary regulated rail for noise-sensitive digital peripherals requiring tight voltage tolerance. Use Value: 20 µs enable response allows synchronized wake-up with MCU GPIO, reducing system-level power-up latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 1.8 V output, 250 mA rating, higher 250 mV dropout at 250 mA, 30 µV RMS noise | Higher current capability but less suitable for ultra-low-noise RF stages due to lower PSRR (55 dB @ 1 kHz) | Select when higher output current is prioritized over lowest possible noise and dropout |
| Torex XC6206P182MR-G | 1.8 V output, 150 mA rating, 160 mV dropout at 100 mA, 40 µV RMS noise, SOT-23-5 package | Smaller SOT-23 footprint but lacks enable pin and has no thermal pad - limits power handling in sustained loads | Select when board space is critical and enable control or thermal performance is not required |
Compared with MCP1700T-1802E/TT and XC6206P182MR-G, the NCP500SN185T1G offers superior noise performance (50 µV vs. 30/40 µV), integrated enable with 1.0 V logic compatibility, and a thermally enhanced DFN package - making it optimal for compact, battery-powered RF and precision analog designs where supply integrity is critical.
Availability
NCP500SN185T1G is available at Aetrix Electronics and suitable for RF front-end modules, portable medical instrumentation, industrial IoT edge controllers, and battery-powered camera systems requiring stable component supply and long-term production continuity.
Supply support for NCP500SN185T1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP500 series is designed specifically for portable, battery-powered systems demanding ultra-low noise, fast enable response, and minimal dropout - targeting RF, sensor, and precision analog subsystems where supply rail integrity directly impacts signal fidelity.
FAQ
What is the maximum input voltage for the NCP500SN185T1G?
The NCP500SN185T1G supports an absolute maximum input voltage of 6.0 V. Operation beyond this rating risks permanent damage. For reliable long-term use, the recommended operating range is 1.8 V to 6.0 V, with sufficient headroom above the 1.85 V output to maintain regulation - e.g., ≥2.02 V minimum input at 150 mA load due to its 170 mV dropout.
Does the NCP500SN185T1G require an external noise-bypass capacitor?
No, the NCP500SN185T1G does not require an external noise-bypass capacitor. Its internal low-noise architecture achieves 50 µV RMS output noise (10 Hz–100 kHz) without one - simplifying design, reducing BOM count, and avoiding potential startup delays associated with bypass caps. A 1.0 µF ceramic output capacitor remains mandatory for stability.
Can the NCP500SN185T1G be used with 1.0 V logic for the Enable pin?
Yes, the NCP500SN185T1G is explicitly designed for 1.0 V logic compatibility: its enable threshold is 0.9 V (turn-on) and 0.15 V (turn-off), allowing direct connection to 1.0 V CMOS outputs without level-shifting circuitry. The enable input draws only 3.0 nA typical bias current, minimizing loading on driving logic.
What package type is used for the NCP500SN185T1G?
The NCP500SN185T1G is supplied in a DFN 2×2.2 mm, 6-pin package (Case 506BA) with an exposed thermal pad. This package provides low thermal resistance (RJA = 225°C/W) and supports automated SMT assembly using standard Type 3/4 solder paste and IR convection reflow profiles qualified for three cycles at 235°C peak.
How does thermal shutdown operate in the NCP500SN185T1G?
The NCP500SN185T1G incorporates internal thermal shutdown that activates at approximately 160°C junction temperature. When triggered, the regulator disables output and remains off until the die cools sufficiently - typically below ~140°C - before automatically resuming regulation. This protects against irreversible damage during sustained overload or inadequate PCB heatsinking.
NCP500SN185T1G 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):
- 1.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.01V @ 1mA
- 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
NCP500SN185T1G FAQ
1.How can I place an order for NCP500SN185T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP500SN185T1G 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 NCP500SN185T1G reliable?
The price and inventory of NCP500SN185T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP500SN185T1G is usually 5 days.
3.What payment methods are accepted for NCP500SN185T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP500SN185T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP500SN185T1G?
NCP500SN185T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP500SN185T1G 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 NCP500SN185T1G?
For technical support, including NCP500SN185T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP500SN185T1G requirements.
6.How does Aetrix verify that NCP500SN185T1G is sourced from the original manufacturer or authorized distributors?
All NCP500SN185T1G 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 NCP500SN185T1G meets industry standards.
7.What is the process for return or replacement of NCP500SN185T1G?
All NCP500SN185T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP500SN185T1G, 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 NCP500SN185T1G part is unused and in its original packaging.
Return procedure for NCP500SN185T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCP500SN185T1G Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
