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onsemi NCP502SN33T1G
- Part No.:
- NCP502SN33T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP502SN33T1G.pdf
- Description:
- IC REG LINEAR 3.3V 80MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:135
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Product details
Overview
NCP502SN33T1G from onsemi is a fixed-output, low-quiescent-current CMOS linear voltage regulator delivering 3.3 V at up to 80 mA 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 as low as 1.0 µF, and features enable control with 1.3 V (high) / 0.3 V (low) thresholds - ideal for battery-powered handheld instruments requiring stable, ultra-low-power regulation.
For engineers reviewing the NCP502SN33T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 80 mA (850 mV max), thermal shutdown protection, SC70-5/TSOP-5 package compatibility, and industrial temperature range compliance without external compensation.
Technical Context
The NCP502SN33T1G implements a PMOS-based LDO architecture with internal voltage reference, error amplifier, and protection circuits including current limit and thermal shutdown (trip ~160 °C). Its enable input allows precise system-level power sequencing, and it operates stably with low-ESR ceramic capacitors down to 1.0 µF.
Designed for portable applications, it achieves 55 dB ripple rejection at 1 kHz and 180 µVRMS output noise (100 Hz–100 kHz), while maintaining load regulation of ≤0.8 mV/mA and line regulation of ≤3.0 mV/V - all without requiring minimum load current or specific ESR constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±2.0% (ensures reliable 3.3 V logic rail tolerance for microcontrollers and sensors) |
| Max Output Current | 80 mA (supports low-power peripherals like BLE radios, display drivers, and sensor interfaces) |
| Quiescent Current | 40 µA typical (enables multi-year battery life in always-on monitoring devices) |
| Dropout Voltage | 850 mV max at 80 mA (allows operation from single-cell Li-ion or two-cell alkaline inputs) |
| Operating Temp Range | −40 °C to +85 °C (meets industrial-grade environmental requirements) |
| Ripple Rejection | 55 dB at 1 kHz (suppresses switching noise from upstream DC-DC converters) |
| Thermal Shutdown | ~160 °C (prevents permanent damage during sustained overload or poor PCB thermal design) |
Pinout & Package
Package: TSOP-5 (SOT-23-5, Case 483), Pb-free, 3.00 × 1.50 × 0.95 mm body height 0.95 mm, pin pitch 0.95 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive power supply input | Accepts 1.3 V to 12 V input; must be decoupled with ≥1.0 µF capacitor near pin |
| 2 - GND | Power supply ground | Reference node for regulation and enable threshold; requires low-impedance PCB trace |
| 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; may be left floating or grounded - no electrical function |
| 5 - Vout | Regulated output voltage | Delivers stable 3.3 V; requires ≥1.0 µF ceramic capacitor directly at pin for stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical enables >10-year battery life in coin-cell–powered IoT endpoints |
| Ceramic-capacitor compatible | Stable with 1.0 µF–10 µF X5R/X7R ceramics - eliminates need for costly tantalum or aluminum electrolytics |
| Enable-controlled shutdown | Reduces ground current to 0.1 µA when disabled - critical for deep-sleep MCU modes |
| ±2.0% output accuracy | Guaranteed across temp/load ensures reliable ADC reference and I/O voltage margining |
| Thermal and current protection | Internally limits fault energy - no external foldback or shutdown circuitry required |
Applications
| Portable Medical Sensors | Industrial Handheld Meters |
|---|---|
|
Use Scenario: Continuous glucose monitor (CGM) using coin-cell battery and ultra-low-power MCU. IC Role / Device Role / Timing Role: Primary 3.3 V LDO supplying MCU core, BLE transceiver, and analog front-end. Use Value: 40 µA IQ extends battery life beyond 2 years; 850 mV dropout enables full utilization of declining cell voltage. |
Use Scenario: Ruggedized multimeter with LCD, touch interface, and isolated serial interface. IC Role / Device Role / Timing Role: Regulator for digital logic and display controller in battery/AC adapter hybrid power system. Use Value: Enable pin synchronizes power-up with MCU boot sequence; ±2.0% accuracy maintains ADC calibration integrity. |
| Wireless Sensor Nodes | Consumer Audio Accessories |
|
Use Scenario: Zigbee-enabled temperature/humidity node powered by AA batteries. IC Role / Device Role / Timing Role: Low-noise 3.3 V source for RF SoC and precision sensor signal chain. Use Value: 180 µVRMS noise and 55 dB ripple rejection prevent RF desense and measurement drift. |
Use Scenario: Bluetooth earbud charging case with LED status indicators and USB-C PD negotiation. IC Role / Device Role / Timing Role: Standby regulator powering real-time clock and wake-up logic during lid-closed state. Use Value: N/C pin simplifies layout; TSOP-5 footprint allows compact placement near battery connector. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3302E/MB | 300 mA max output, 1.6 µA IQ, SOT-23-3 package (no enable, no N/C) | Lacks enable control and thermal shutdown; suited only for non-critical, low-current loads | Select when ultra-low IQ dominates and enable/shutdown is unnecessary |
| TPS7A0533PDBVR | 200 mA max, 25 µA IQ, 1.4 V min Vin, SOT-23-5 with enable and active-low reset | Lower dropout (175 mV @ 100 mA), but higher cost and tighter layout sensitivity | Select when <200 mV dropout is mandatory and board space permits larger die size |
Compared with MCP1700T-3302E/MB and TPS7A0533PDBVR, the NCP502SN33T1G offers balanced performance: sufficient 80 mA drive, robust 850 mV dropout headroom, integrated thermal/current protection, and proven ceramic-capacitor stability - making it optimal for cost-sensitive, battery-constrained industrial and medical edge devices where reliability trumps marginal IQ reduction.
Availability
NCP502SN33T1G is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld meters, wireless sensor nodes, and consumer audio accessories requiring stable component supply with guaranteed long-term manufacturability and Pb-free compliance.
Supply support for NCP502SN33T1G 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 electronics, with leadership in automotive, industrial, cloud, and medical applications.
The NCP502 series belongs to onsemi's precision analog LDO portfolio, designed specifically for ultra-low-power, battery-operated portable equipment where quiescent current, small footprint, and ceramic-capacitor compatibility are primary system constraints.
FAQ
What is the maximum input voltage rating for the NCP502SN33T1G?
The NCP502SN33T1G has an absolute maximum input voltage (Vin) rating of 12 V, as specified in the Maximum Ratings table. Operation above this level risks permanent damage. For reliable 3.3 V output, input should remain ≥4.15 V (3.3 V + 850 mV dropout) under full 80 mA load, and derating is recommended above 85 °C ambient.
Does the NCP502SN33T1G require an external capacitor on the enable pin?
No, the NCP502SN33T1G does not require an external capacitor on the enable pin. The enable input is CMOS-compatible with high impedance; it functions correctly with direct connection to a GPIO or resistor divider. Adding capacitance may slow turn-on/off response and is unnecessary unless intentional soft-start behavior is needed - which is not supported by the device's internal design.
Can the NCP502SN33T1G be used with a 10 µF ceramic output capacitor?
Yes, the NCP502SN33T1G is explicitly designed for stability with ceramic output capacitors ranging from 1.0 µF to 10 µF, including X5R and X7R dielectrics. Larger values improve load transient response and noise filtering but do not affect loop stability - unlike older LDOs requiring minimum ESR, this device imposes no ESR constraints.
Is the NCP502SN33T1G pin-compatible with the NCP502SN33T2G?
No, the NCP502SN33T1G (TSOP-5 package) and NCP502SN33T2G (SC70-5 package) share identical electrical specifications and pin functions but differ in physical package dimensions, pin pitch (0.95 mm vs. 0.65 mm), and thermal resistance (205 °C/W vs. 400 °C/W). They are not mechanically interchangeable without PCB redesign.
What is the purpose of Pin 4 (N/C) on the NCP502SN33T1G?
Pin 4 on the NCP502SN33T1G is a true no-connect (N/C) terminal with no internal bond wire or circuit connection. It may be left unconnected, tied to ground, or routed as a keep-out zone - none affects device operation. This pin exists for mechanical symmetry in the TSOP-5 mold and simplifies automated assembly handling; it carries zero electrical function.
NCP502SN33T1G 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):
- 3.3V
- 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
NCP502SN33T1G FAQ
1.How can I place an order for NCP502SN33T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP502SN33T1G 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 NCP502SN33T1G reliable?
The price and inventory of NCP502SN33T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP502SN33T1G is usually 5 days.
3.What payment methods are accepted for NCP502SN33T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP502SN33T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP502SN33T1G?
NCP502SN33T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP502SN33T1G 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 NCP502SN33T1G?
For technical support, including NCP502SN33T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP502SN33T1G requirements.
6.How does Aetrix verify that NCP502SN33T1G is sourced from the original manufacturer or authorized distributors?
All NCP502SN33T1G 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 NCP502SN33T1G meets industry standards.
7.What is the process for return or replacement of NCP502SN33T1G?
All NCP502SN33T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP502SN33T1G, 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 NCP502SN33T1G part is unused and in its original packaging.
Return procedure for NCP502SN33T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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