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onsemi NCP502SN34T1G
- Part No.:
- NCP502SN34T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP502SN34T1G.pdf
- Description:
- IC REG LINEAR 3.4V 80MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,026
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Product details
Overview
NCP502SN34T1G from onsemi is a fixed-output, low-quiescent-current CMOS linear voltage regulator delivering 3.4 V at up to 80 mA output current with 40 µA typical quiescent current and ±2.0% output voltage accuracy over −40 °C to +85 °C. It uses a PMOS pass transistor, supports ceramic output capacitors down to 1.0 µF, and features enable control with 1.3 V (turn-on) and 0.3 V (turn-off) thresholds - ideal for battery-powered handheld instruments requiring stable low-power bias.
For engineers reviewing the NCP502SN34T1G datasheet, pinout, applications, or equivalent options, key selection considerations include dropout voltage (850 mV @ 80 mA), thermal protection, SC70-5/TSOP-5 package compatibility, and industrial temperature range compliance without external compensation.
Technical Context
The NCP502SN34T1G implements a PMOS-based LDO architecture with internal voltage reference, error amplifier, and thermal shutdown circuitry. Its enable input provides logic-level control of output regulation, and it operates stably with low-ESR ceramic capacitors as small as 1.0 µF on both input and output.
Designed for portable systems, it achieves ultra-low ground current (40 µA typ.) while maintaining 0.2 mV/mA load regulation and 0.4 mV/V line regulation. Dropout voltage is specified at 850 mV under full 80 mA load and across the full operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.4 V ±2.0% - tightly regulated supply for 3.3 V–3.4 V logic rails and analog sensors |
| Max Output Current | 80 mA - sufficient for microcontrollers, RF front-ends, and sensor signal chains in compact devices |
| Quiescent Current | 40 µA typical - enables multi-year battery life in always-on monitoring applications |
| Dropout Voltage | 850 mV @ 80 mA - allows operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (3.2 V min) |
| Input Voltage Range | Up to 12 V - supports wide-input designs including USB-powered and adapter-fed systems |
| Operating Temp | −40 °C to +85 °C - qualified for industrial and consumer-grade embedded environments |
| Ripple Rejection | 55 dB @ 1 kHz - suppresses switching noise from upstream DC/DC converters |
| Output Noise | 180 µVrms (100 Hz–100 kHz) - suitable for noise-sensitive analog circuits like ADC references |
Pinout & Package
Package: TSOP-5 (SOT-23-5, Case 483), Pb-free, surface-mount. Pin 4 is Vout; Pin 1 is Vin; Pin 2 is GND; Pin 3 is Enable; Pin 4 is Vout; Pin 5 is N/C (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive power supply input - must be ≥ (3.4 V + dropout) and ≤ 12 V; decoupled with ≥1.0 µF ceramic capacitor |
| 2 | GND | Power ground reference - requires low-impedance PCB trace to minimize noise coupling and thermal resistance |
| 3 | Enable | Logic-controlled ON/OFF input - pulled high to Vin for operation; pulled low (<0.3 V) disables output and reduces IQ to 0.1 µA |
| 4 | Vout | Regulated 3.4 V output - connects directly to load; requires ≥1.0 µF ceramic capacitor for stability and transient response |
| 5 | N/C | No internal connection - may be left unconnected or grounded; no electrical function or thermal role |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - extends battery runtime in always-on IoT nodes and wearables |
| Stable with ceramic capacitors | 1.0 µF minimum output capacitance - eliminates need for costly tantalum or aluminum electrolytics |
| Integrated thermal shutdown | Activates at ~160 °C - prevents damage during overload or poor PCB thermal design |
| High output accuracy | ±2.0% over temp and load - ensures reliable operation of precision analog and digital peripherals |
| Low dropout voltage | 850 mV @ 80 mA - maximizes usable battery voltage range in space-constrained portable designs |
| Enable threshold control | 1.3 V turn-on / 0.3 V turn-off - compatible with standard GPIOs and open-drain controllers |
Applications
| Portable Medical Sensors | Industrial Handheld Meters |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE MCU and analog front-end. IC Role / Device Role / Timing Role: Primary 3.4 V bias regulator for MCU core, BLE radio, and op-amp sensor interface. Use Value: 40 µA quiescent current enables >2-year coin-cell operation; ±2.0% accuracy maintains ADC reference integrity across temperature. |
Use Scenario: Ruggedized multimeter with LCD display, microcontroller, and isolated serial interface. IC Role / Device Role / Timing Role: Main 3.4 V supply for MCU, display driver, and measurement ASIC. Use Value: 850 mV dropout allows operation down to 4.25 V input - critical for extended runtime on 2xAA alkaline packs. |
| Wireless Sensor Nodes | Smart Home Peripherals |
Use Scenario: Battery-powered Zigbee temperature/humidity node with sleep-wake cycling. IC Role / Device Role / Timing Role: Always-on LDO enabling fast wake-up from deep-sleep mode via Enable pin control. Use Value: Enable pin with 0.3 V low-threshold ensures clean disable during MCU sleep; 55 dB ripple rejection isolates RF section from noisy DC/DC sources. |
Use Scenario: Voice-controlled smart plug with Wi-Fi SoC, relay driver, and status LED. IC Role / Device Role / Timing Role: Secondary 3.4 V rail for Wi-Fi module I/O and level-shifting logic. Use Value: TSOP-5 package fits tight board space; 180 µVrms output noise prevents audible artifacts in voice processing path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3402E/TT | 300 mA max output, 1.6 µA IQ, SOT-23-3 (no enable) | Lacks enable pin and thermal shutdown; higher output current but lower accuracy (±2.5%) | Choose when ultra-low IQ dominates and enable control is unnecessary |
| TPS70634QDBVRQ1 | 150 mA, 1.7 µA IQ, automotive AEC-Q100 Grade 3, SOT-23-5 with enable | Higher cost, wider temp range (−40 °C to +125 °C), tighter accuracy (±1.5%), but larger dropout (1.1 V @ 150 mA) | Choose for automotive-grade reliability where 3.4 V rail must survive engine-bay thermal stress |
Compared with MCP1700T-3402E/TT and TPS70634QDBVRQ1, the NCP502SN34T1G offers balanced performance: moderate IQ (40 µA), integrated enable and thermal protection, and optimized dropout for 3.4 V loads - making it ideal for cost-sensitive industrial and portable consumer designs where full automotive qualification is not required.
Availability
NCP502SN34T1G is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld meters, wireless sensor nodes, and smart home peripherals requiring stable component supply with consistent lead times and full traceability.
Supply support for NCP502SN34T1G 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, sensing, and connectivity solutions for automotive, industrial, and consumer markets.
The NCP502SN34T1G belongs to the NCP502 series of ultra-low-IQ CMOS LDO regulators, designed specifically for battery-powered handheld equipment where minimal standby current and small footprint are critical.
FAQ
What is the maximum input voltage rating for the NCP502SN34T1G?
The NCP502SN34T1G has an absolute maximum input voltage of 12 V, as specified in the Maximum Ratings table. Operation above this voltage risks permanent damage. For reliable long-term use, keep Vin ≤ 12 V and ensure transient spikes are clamped below this limit using appropriate input protection.
Does the NCP502SN34T1G require an external capacitor on its output?
Yes, the NCP502SN34T1G requires a minimum 1.0 µF ceramic capacitor on the Vout pin for stability and transient response. The datasheet confirms it is stable with low-ESR ceramics and does not require specific ESR ranges - unlike older LDOs - simplifying layout and reducing BOM cost.
Can the NCP502SN34T1G be used in automotive applications?
The NCP502SN34T1G is rated for −40 °C to +85 °C and is not AEC-Q100 qualified. For automotive use, select the NCV502SN34T1G variant instead - it shares identical electrical specs but adds AEC-Q100 Grade 3 qualification and PPAP capability per the ordering table.
What is the dropout voltage of the NCP502SN34T1G at 80 mA load?
The dropout voltage of the NCP502SN34T1G is 850 mV at 80 mA load and across the full operating temperature range (−40 °C to +85 °C), measured when Vout drops 3.0% below nominal. This allows operation from inputs as low as 4.25 V while maintaining regulation.
Is Pin 5 of the NCP502SN34T1G electrically connected internally?
No, Pin 5 of the NCP502SN34T1G is labeled N/C (No Connection) and has no internal connection. It may be left floating or tied to ground for mechanical stability, but it serves no electrical function and contributes no thermal path or signal integrity benefit.
NCP502SN34T1G 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):
- 12V
- Voltage - Output (Min/Fixed):
- 3.4V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.2V @ 80mA
- Current - Output:
- 80mA
- Current - Quiescent (Iq):
- 40 µA
- Current - Supply (Max):
- 90 µA
- PSRR:
- 55dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP502SN34T1G FAQ
1.How can I place an order for NCP502SN34T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP502SN34T1G 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 NCP502SN34T1G reliable?
The price and inventory of NCP502SN34T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP502SN34T1G is usually 5 days.
3.What payment methods are accepted for NCP502SN34T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP502SN34T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP502SN34T1G?
NCP502SN34T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP502SN34T1G 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 NCP502SN34T1G?
For technical support, including NCP502SN34T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP502SN34T1G requirements.
6.How does Aetrix verify that NCP502SN34T1G is sourced from the original manufacturer or authorized distributors?
All NCP502SN34T1G 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 NCP502SN34T1G meets industry standards.
7.What is the process for return or replacement of NCP502SN34T1G?
All NCP502SN34T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP502SN34T1G, 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 NCP502SN34T1G part is unused and in its original packaging.
Return procedure for NCP502SN34T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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