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onsemi NCP502SN29T1G
- Part No.:
- NCP502SN29T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP502SN29T1G.pdf
- Description:
- IC REG LINEAR 2.9V 80MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,180
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Product details
Overview
NCP502SN29T1G from onsemi is a fixed-output, low-quiescent-current CMOS linear voltage regulator delivering 2.9 V at up to 80 mA with 40 µA typical quiescent current, ±2.0% output voltage accuracy, and 850 mV typical dropout voltage at 80 mA - designed for battery-powered portable electronics such as handheld instruments and camcorders.
For engineers reviewing the NCP502SN29T1G datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low IQ operation, TSOP-5 package thermal performance (RJA = 205 °C/W), enable threshold compatibility (1.3 V high / 0.3 V low), and ceramic-capacitor stability without ESR constraints.
Technical Context
The NCP502SN29T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection circuits - enabling stable regulation with minimal external components. Its architecture supports operation down to 1.3 V enable threshold and tolerates input voltages up to 12 V.
Designed for industrial temperature range (−40 °C to +85 °C), it delivers 2.9 V output with 100 ppm/°C temperature coefficient and 55 dB ripple rejection at 1 kHz. The device achieves 180 µVRMS output noise (100 Hz–100 kHz) and maintains regulation under load transients up to 80 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.9 V nominal, ±2.0% accuracy over temperature and load - ensures stable core logic or sensor supply in portable systems. |
| Quiescent Current | 40 µA typical - extends battery life in always-on or low-duty-cycle applications like remote sensors. |
| Dropout Voltage | 850 mV typical at 80 mA - enables operation from single-cell Li-ion (3.0–4.2 V) or two-cell alkaline inputs. |
| Max Input Voltage | 12 V - supports wide-input industrial or automotive accessory rails with margin. |
| Thermal Resistance | 205 °C/W (Junction-to-Ambient, TSOP-5) - defines safe continuous power dissipation limit (~250 mW at 25 °C ambient). |
| Enable Threshold | 1.3 V (high), 0.3 V (low) - compatible with 1.8 V/3.3 V GPIO control without level-shifting. |
| Output Noise | 180 µVRMS (100 Hz–100 kHz) - suitable for noise-sensitive analog circuitry including ADC references. |
Pinout & Package
Package: TSOP-5 (SOT-23-5, Case 483), Pb-free, surface-mount - optimized for compact PCB layouts with 3.0 mm × 1.5 mm footprint and 0.95 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive power supply input | Accepts 2.9 V + dropout to 12 V; requires local 1.0 µF decoupling capacitor. |
| 2 - GND | Power supply ground | Reference node for regulation and enable logic; must be low-impedance connection. |
| 3 - Enable | Active-high enable control | Pull ≥1.3 V to activate regulator; pull ≤0.3 V to disable (IQ drops to 0.1 µA). |
| 4 - N/C | No internal connection | Not bonded; PCB trace may be omitted or left floating - no electrical function. |
| 5 - Vout | Regulated output voltage | Delivers 2.9 V ±2% to load; stable with 1.0 µF ceramic output capacitor (no ESR requirement). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - reduces standby power loss by >90% vs. standard LDOs, critical for multi-year battery life. |
| Ceramic-capacitor compatibility | Stable with 1.0 µF X5R/X7R ceramics - eliminates need for costly tantalum or aluminum electrolytics. |
| Integrated protection | Thermal shutdown (160 °C) and current limiting - prevents damage during overload or poor heatsinking. |
| High PSRR | 55 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the input rail. |
| Industrial temperature range | −40 °C to +85 °C operation - validated for use in outdoor instrumentation and factory-floor equipment. |
Applications
| Handheld Test Equipment | Portable Medical Sensors |
|---|---|
Use Scenario: Battery-powered multimeter with LCD display and microcontroller requiring clean 2.9 V supply. IC Role / Device Role / Timing Role: Primary voltage regulator supplying MCU core and analog front-end. Use Value: 40 µA quiescent current extends 2×AA battery life beyond 12 months in sleep mode. |
Use Scenario: Wearable pulse oximeter using low-noise analog signal chain powered from coin cell. IC Role / Device Role / Timing Role: Low-noise LDO providing reference voltage for ADC and op-amp stages. Use Value: 180 µVRMS output noise avoids degradation of SpO₂ measurement resolution. |
| Smart Remote Controls | IoT Edge Node Sensors |
Use Scenario: BLE-enabled universal remote with motion sensing and button interface. IC Role / Device Role / Timing Role: Power management IC regulating 2.9 V for RF SoC and accelerometer. Use Value: 850 mV dropout allows full functionality down to 3.75 V battery voltage (single Li-ion). |
Use Scenario: Environmental monitoring node with temperature/humidity sensor and LoRaWAN radio. IC Role / Device Role / Timing Role: System-level LDO enabling simultaneous sensor readout and wireless transmission. Use Value: Enable pin permits synchronized power gating to reduce average system current to <1 µA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2902E/TT | 250 nA quiescent current, 200 mA output, SOT-23-3 package (no enable) | Lacks enable pin and thermal shutdown; lower IQ but higher cost per unit | Preferred when ultra-deep sleep dominates design and enable control is unnecessary |
| TPS7A0529PDQNR | 25 µA IQ, 200 mA output, 0.6 V dropout at 100 mA, WSON-6 package | Lower dropout and higher current, but requires 0.47 µF minimum output capacitance | Selected when tighter input headroom or higher load current is required |
Compared with MCP1700T-2902E/TT and TPS7A0529PDQNR, the NCP502SN29T1G offers balanced trade-offs: moderate IQ (40 µA), integrated enable and protection, TSOP-5 thermal performance, and proven ceramic-capacitor stability - making it optimal for cost-sensitive, space-constrained portable designs where reliability and ease of use are prioritized.
Availability
NCP502SN29T1G is available at Aetrix Electronics and suitable for handheld instruments, portable medical sensors, and IoT edge nodes requiring stable component supply with long-term manufacturability assurance.
Supply support for NCP502SN29T1G 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, and sensor solutions for automotive, industrial, and consumer markets.
The NCP502 series belongs to onsemi's low-power linear regulator product line, engineered specifically for battery-operated portable devices demanding ultra-low quiescent current and small-footprint packaging.
FAQ
What is the maximum input voltage rating for the NCP502SN29T1G?
The NCP502SN29T1G has an absolute maximum input voltage rating of 12 V, as specified in the Maximum Ratings table. Operation above this voltage risks permanent damage. For reliable long-term use, input should remain within 2.9 V + dropout (≥3.75 V) up to 12 V, with thermal limits observed based on PCB layout and ambient conditions.
Does the NCP502SN29T1G require an external capacitor on the output pin?
Yes, the NCP502SN29T1G requires a minimum 1.0 µF ceramic output capacitor (COUT) for stability, as confirmed in the Applications Information section. Unlike many older LDOs, it imposes no ESR requirement - enabling use of low-cost X5R/X7R MLCCs without risk of oscillation.
Can the NCP502SN29T1G be used with a 1.8 V enable signal?
Yes - the NCP502SN29T1G enable threshold is 1.3 V (typical turn-on) and 0.3 V (typical turn-off), making it fully compatible with 1.8 V GPIO outputs. No level-shifter is needed, and the enable pin draws negligible current (<100 nA) in either state.
What is the thermal performance of the NCP502SN29T1G in its TSOP-5 package?
In the TSOP-5 package (Case 483), the NCP502SN29T1G has a junction-to-ambient thermal resistance (RJA) of 205 °C/W under standard test conditions (1 oz copper, 100 mm² spread area). This allows ~250 mW maximum power dissipation at 25 °C ambient before reaching the 150 °C max junction temperature.
Is the NCP502SN29T1G still in active production or discontinued?
Per the April 2026 revision of the official onsemi datasheet (NCP502/D Rev. 23), the NCP502SN29T1G is marked as discontinued. However, Aetrix Electronics maintains active inventory and provides lifecycle coordination support, including last-time-buy planning and qualified second-source alternatives upon request.
NCP502SN29T1G 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):
- 2.9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 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
NCP502SN29T1G FAQ
1.How can I place an order for NCP502SN29T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP502SN29T1G 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 NCP502SN29T1G reliable?
The price and inventory of NCP502SN29T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP502SN29T1G is usually 5 days.
3.What payment methods are accepted for NCP502SN29T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP502SN29T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP502SN29T1G?
NCP502SN29T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP502SN29T1G 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 NCP502SN29T1G?
For technical support, including NCP502SN29T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP502SN29T1G requirements.
6.How does Aetrix verify that NCP502SN29T1G is sourced from the original manufacturer or authorized distributors?
All NCP502SN29T1G 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 NCP502SN29T1G meets industry standards.
7.What is the process for return or replacement of NCP502SN29T1G?
All NCP502SN29T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP502SN29T1G, 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 NCP502SN29T1G part is unused and in its original packaging.
Return procedure for NCP502SN29T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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