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onsemi NCP502SQ15T1
- Part No.:
- NCP502SQ15T1
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP502SQ15T1.pdf
- Description:
- IC REG LINEAR 1.5V 80MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:2,007
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Product details
Overview
NCP502SQ15T1 from onsemi is a fixed-output, low-quiescent-current CMOS linear voltage regulator delivering 1.5 V at up to 80 mA with 40 µA typical quiescent current and ±2.0% output voltage accuracy. It features PMOS pass transistor architecture, thermal shutdown, current limiting, and operates across −40 °C to +85 °C. Designed for battery-powered portable electronics requiring stable low-voltage supply.
For engineers reviewing the NCP502SQ15T1 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage (≤1500 mV at 80 mA), enable threshold compatibility (1.3 V high / 0.3 V low), SC70-5 package footprint, and ceramic capacitor stability (1.0 µF input/output).
Technical Context
The NCP502SQ15T1 implements a PMOS-based LDO architecture with internal voltage reference, error amplifier, and protection circuits including thermal shutdown and current limit. Its ultra-low quiescent current enables extended battery life in always-on subsystems.
It supports enable-controlled power sequencing with logic-compatible thresholds and maintains regulation under load transients up to 80 mA while rejecting 55 dB of 1 kHz ripple. The device is optimized for use with low-ESR ceramic capacitors and exhibits no minimum load requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.5 V ±2.0% - tightly regulated rail for low-power microcontrollers or sensors |
| Max Output Current | 80 mA - sufficient for single-core MCUs, RF modules, or sensor interfaces |
| Quiescent Current | 40 µA typical - enables >1-year battery life in 10 µA standby systems |
| Dropout Voltage | 1500 mV max at 80 mA - requires Vin ≥ 3.0 V for full-load 1.5 V operation |
| Line Regulation | 0.4 mV/V typical - ensures <1.2 mV output shift over 3–12 V input range |
| Ripple Rejection | 55 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters |
| Operating Temp | −40 °C to +85 °C - suitable for consumer and industrial ambient environments |
Pinout & Package
The NCP502SQ15T1 is housed in the SC70-5 (SOT-353) surface-mount package - 2.0 mm × 2.1 mm × 0.9 mm, lead-free, moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply - accepts 1.8 V to 12 V; must be decoupled with ≥1.0 µF ceramic capacitor |
| 2 | GND | Power ground - low-impedance return path critical for noise immunity and thermal performance |
| 3 | Enable | Active-high digital control - pulls high to Vin to activate regulator; ≤0.3 V disables output |
| 4 | N/C | No internal connection - PCB trace may be omitted or left floating; not electrically bonded |
| 5 | Vout | Regulated 1.5 V output - requires ≥1.0 µF ceramic capacitor; stable with ESR from near-zero to 5 Ω |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 40 µA typical - reduces battery drain in sleep mode without compromising wake-up speed |
| Ceramic capacitor compatible | Stable with 1.0 µF X5R/X7R ceramics - eliminates need for costly tantalum or electrolytic caps |
| Enable function | Logic-level compatible thresholds (1.3 V ON / 0.3 V OFF) - interfaces directly with 1.8 V/3.3 V GPIO |
| Thermal & current protection | Internal shutdown at ~160 °C and foldback current limit - prevents damage during overload or poor heatsinking |
| Pb-free SC70-5 package | RoHS-compliant, 0.65 mm pitch, 5-pin footprint - enables high-density portable PCB layouts |
Applications
| Wearable Sensor Node | Bluetooth LE Peripheral |
|---|---|
|
Use Scenario: Compact wearable device with accelerometer, temperature sensor, and BLE SoC powered by coin cell. IC Role / Device Role / Timing Role: Primary 1.5 V supply for ultra-low-power sensor interface and BLE radio core logic. Use Value: 40 µA quiescent current extends CR2032 battery life beyond 18 months in deep-sleep monitoring mode. |
Use Scenario: Small-form-factor BLE beacon transmitting periodic advertisements using minimal external components. IC Role / Device Role / Timing Role: Regulated 1.5 V rail for BLE SoC I/O and RF section, enabled only during transmission bursts. Use Value: Enable pin allows synchronous power gating with SoC wake-up signal, eliminating leakage between advertising intervals. |
| Industrial Handheld Meter | Low-Power IoT Edge Node |
|
Use Scenario: Battery-operated multimeter with LCD display, analog front-end, and MCU operating across −20 °C to +60 °C. IC Role / Device Role / Timing Role: Precision 1.5 V reference and supply for ADC reference buffer and MCU core voltage. Use Value: ±2.0% output accuracy and 100 ppm/°C tempco ensure consistent measurement calibration across operating temperature range. |
Use Scenario: Solar-charged environmental sensor node measuring humidity, pressure, and light, sleeping >99% of time. IC Role / Device Role / Timing Role: Always-on 1.5 V supply for real-time clock and wake-up controller, powering main MCU only on schedule. Use Value: SC70-5 footprint minimizes board area while thermal resistance of 400 °C/W allows passive dissipation even at 80 mA peak loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1502E/TT | 2.0 µA IQ, 250 mA output, SOT-23-3 (no enable) | Lacks enable pin and thermal shutdown; higher output current but larger dropout at 1.5 V | Choose when ultra-low IQ dominates and enable/control is handled externally |
| TPS78015DRVR | 500 nA IQ, 150 mA, WSON-6 with enable and power-good | Lower IQ but larger package, higher cost, and tighter layout constraints than SC70-5 | Choose when nanoscale IQ is mandatory and board space permits WSON-6 |
Compared with MCP1700T-1502E/TT and TPS78015DRVR, the NCP502SQ15T1 offers optimal balance of ultra-low IQ (40 µA), integrated enable, thermal protection, and minimal SC70-5 footprint - making it ideal for space-constrained, battery-critical designs where moderate output current suffices.
Availability
NCP502SQ15T1 is available at Aetrix Electronics and suitable for wearable electronics, Bluetooth peripherals, and industrial handheld meters requiring stable component supply with long-term manufacturability assurance.
Supply support for NCP502SQ15T1 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 innovation for automotive, industrial, cloud, and IoT applications.
The NCP502SQ15T1 belongs to the NCP502 series of low-IQ CMOS LDO regulators, engineered specifically for battery-powered portable equipment demanding ultra-low standby current and small-footprint integration.
FAQ
What is the maximum input voltage rating for the NCP502SQ15T1?
The NCP502SQ15T1 has an absolute maximum input voltage of 12 V, as specified in the Maximum Ratings table. Operation above this level risks permanent damage. For reliable 1.5 V output at 80 mA, input should remain ≥3.0 V to maintain regulation given its 1500 mV max dropout voltage.
Does the NCP502SQ15T1 require an output capacitor, and what type is recommended?
Yes, the NCP502SQ15T1 requires a minimum 1.0 µF ceramic output capacitor (X5R or X7R dielectric) placed close to the Vout and GND pins. Unlike older LDOs, it is stable across a wide ESR range (near-zero to 5 Ω) and does not need a minimum load, enabling robust noise filtering and transient response.
Is the NCP502SQ15T1 pin-compatible with other variants in the NCP502 family?
Yes - all NCP502 variants in SC70-5 (SQ suffix) share identical pinout, package dimensions, and electrical interface. Only the output voltage and marking code differ; swapping NCP502SQ15T1 for NCP502SQ33T1 requires no PCB changes but validates system-level voltage tolerance.
What is the enable pin behavior when left unconnected on the NCP502SQ15T1?
The NCP502SQ15T1 enable pin must not be left floating. Per datasheet guidance, if unused, it must be tied directly to Vin to ensure reliable turn-on. An unconnected enable pin may cause erratic startup, oscillation, or failure to regulate due to noise coupling into the high-impedance input.
How does thermal performance differ between the SC70-5 and TSOP-5 packages for the NCP502 series?
The SC70-5 package (used by NCP502SQ15T1) has a junction-to-ambient thermal resistance (RJA) of 400 °C/W, versus 205 °C/W for TSOP-5. This means the SC70-5 reaches thermal limit faster under load - e.g., at 80 mA and 3.0 V dropout, power dissipation is 240 mW, raising junction temperature ~96 °C above ambient in SC70-5.
NCP502SQ15T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.9V @ 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:
- SC-88A (SC-70-5/SOT-353)
NCP502SQ15T1 FAQ
1.How can I place an order for NCP502SQ15T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP502SQ15T1 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 NCP502SQ15T1 reliable?
The price and inventory of NCP502SQ15T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP502SQ15T1 is usually 5 days.
3.What payment methods are accepted for NCP502SQ15T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP502SQ15T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP502SQ15T1?
NCP502SQ15T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP502SQ15T1 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 NCP502SQ15T1?
For technical support, including NCP502SQ15T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP502SQ15T1 requirements.
6.How does Aetrix verify that NCP502SQ15T1 is sourced from the original manufacturer or authorized distributors?
All NCP502SQ15T1 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 NCP502SQ15T1 meets industry standards.
7.What is the process for return or replacement of NCP502SQ15T1?
All NCP502SQ15T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP502SQ15T1, 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 NCP502SQ15T1 part is unused and in its original packaging.
Return procedure for NCP502SQ15T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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