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onsemi NCP612SQ50T1G
- Part No.:
- NCP612SQ50T1G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP612SQ50T1G.pdf
- Description:
- IC REG LINEAR 5V 100MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:1,210
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Product details
Overview
NCP612SQ50T1G from onsemi is a fixed-output CMOS low-dropout linear voltage regulator delivering 5.0 V at up to 100 mA, featuring ultra-low 40 µA quiescent current and 230 mV dropout at full load - designed for battery-powered portable electronics requiring stable, low-power voltage regulation.
For engineers reviewing the NCP612SQ50T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its SC70-5 package footprint, enable-controlled standby mode, ±2.0% output accuracy over −40 °C to +85 °C, and compatibility with low-ESR ceramic capacitors without stability compensation.
Technical Context
The NCP612SQ50T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection - enabling low-noise, high-accuracy regulation without external compensation. Its enable input provides logic-level control (VTH(HI) = 0.95 V, VTH(LO) = 0.3 V) for system power sequencing.
Designed for handheld and portable applications, it operates across 0–6.0 V input while maintaining regulation down to 5.23 V input at 100 mA (5.0 V output), with ground current scaling from 40 µA (no load) to 90 µA (full load) and output noise of 100 µVRMS (100 Hz–100 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2.0% over −40 °C to +85 °C - ensures stable MCU/peripheral supply under temperature variation. |
| Max Output Current | 100 mA continuous - sufficient for low-power microcontrollers, sensors, and RF front-ends in compact devices. |
| Dropout Voltage | 230 mV at 100 mA - enables operation from single-cell Li-ion (nominal 3.7 V) or two-cell alkaline (3.0 V) with margin. |
| Quiescent Current | 40 µA typical - extends battery life in always-on or sleep-mode applications like remote controls and wearables. |
| Enable Threshold | Logic-high turn-on at ≥0.95 V; turn-off at ≤0.3 V - compatible with 1.8 V/3.3 V GPIO without level-shifting. |
| Thermal Protection | Internal shutdown at ~160 °C - prevents damage during transient overload or poor PCB thermal design. |
| Noise Performance | 100 µVRMS (100 Hz–100 kHz) - supports noise-sensitive analog circuits (e.g., ADC references, audio codecs). |
Pinout & Package
Housed in the SC70-5 (SOT-353) surface-mount package - 2.0 mm × 2.1 mm footprint with 0.65 mm pitch - optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive input supply | Accepts 0–6.0 V; requires local 1.0 µF ceramic decoupling for line transient immunity. |
| 2 - Gnd | Power ground reference | Must be low-impedance connection; shared return path for input/output capacitors and load. |
| 3 - Enable | Active-high enable control | Pull high to Vin to activate; pull low to disable (40 µA standby); leave unconnected only if tied to Vin. |
| 4 - N/C | No internal connection | Not bonded; must remain floating - no routing or soldering required. |
| 5 - Vout | Regulated output | Delivers 5.0 V ±2.0%; requires 1.0 µF ceramic output capacitor for stability and load transient response. |
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. |
| Low dropout architecture | 230 mV at 100 mA - enables higher efficiency and longer runtime when input voltage sags near output level. |
| High output accuracy | ±2.0% over temperature and load - eliminates need for post-regulation trimming in cost-sensitive consumer designs. |
| Capacitor flexibility | Stable with 1.0 µF ceramic capacitors (0–5 Ω ESR) - removes dependency on costly tantalum or polymer caps. |
| Integrated protection | Thermal shutdown + current limit - prevents failure during short-circuit or overtemperature events without external circuitry. |
Applications
| Smart Wearables | IoT Sensor Nodes |
|---|---|
|
Use Scenario: Compact fitness tracker with BLE SoC, accelerometer, and OLED display operating from coin-cell or rechargeable Li-ion. IC Role / Device Role / Timing Role: Primary 5.0 V rail regulator for digital subsystem and display backlight driver. Use Value: 40 µA quiescent current extends battery life beyond 6 months in intermittent-sensing mode; SC70-5 footprint saves board area. |
Use Scenario: Battery-powered environmental sensor node transmitting temperature/humidity data via LoRaWAN every 10 minutes. IC Role / Device Role / Timing Role: Stable 5.0 V supply for microcontroller, radio transceiver, and analog sensor interface. Use Value: ±2.0% output accuracy ensures consistent ADC reference and radio PA bias; low noise avoids RF desense. |
| Portable Medical Devices | Handheld Test Instruments |
|
Use Scenario: Pocket-sized pulse oximeter using red/IR LEDs and photodiode amplifier, powered by AAA batteries. IC Role / Device Role / Timing Role: Low-noise 5.0 V source for analog front-end and LED drivers. Use Value: 100 µVRMS output noise prevents signal corruption in µV-level photodiode measurements. |
Use Scenario: Field-deployable multimeter with LCD, microcontroller, and precision analog measurement circuitry. IC Role / Device Role / Timing Role: Main 5.0 V supply for digital logic and display, enabled only during active measurement. Use Value: Enable pin allows full system shutdown between readings, reducing average current to <1 µA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-quiescent linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-5002E/MB | 400 mV dropout at 250 mA; 1.8 µA quiescent current; SOT-23-3 package (no enable). | Lacks enable control and has higher dropout - suitable only for higher-input-voltage systems where ultra-low IQ dominates. | Choose when minimal IQ is primary and enable functionality is unnecessary. |
| TCS2115-5.0 | 250 mV dropout at 150 mA; 50 µA IQ; SC70-5 package with enable; ±1.5% accuracy. | Slightly tighter accuracy and higher current capability, but 25% higher quiescent current than NCP612SQ50T1G. | Prefer when tighter output tolerance is required and 10 µA extra IQ is acceptable. |
Compared with MCP1700T-5002E/MB and TCS2115-5.0, the NCP612SQ50T1G uniquely balances ultra-low 40 µA quiescent current, enable control, SC70-5 footprint, and 230 mV dropout - making it optimal for space- and energy-constrained portable designs where all three attributes are simultaneously required.
Availability
NCP612SQ50T1G is available at Aetrix Electronics and suitable for smart wearables, IoT sensor nodes, and portable medical devices requiring stable component supply with long-term lifecycle support.
Supply support for NCP612SQ50T1G 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, delivering silicon solutions for automotive, industrial, cloud, and intelligent edge applications.
The NCP612SQ50T1G belongs to onsemi's NCP612 series of ultra-low-IQ CMOS LDOs - engineered specifically for battery-powered portable equipment where extended runtime and miniature packaging are essential.
FAQ
What is the maximum input voltage rating for the NCP612SQ50T1G?
The NCP612SQ50T1G has an absolute maximum input voltage (Vin) rating of 6.0 V. Exceeding this voltage may cause permanent damage. For reliable operation, the recommended input range is 5.23 V to 6.0 V when delivering 100 mA at 5.0 V output - ensuring sufficient headroom above the 230 mV dropout voltage. Always observe derating guidelines per ambient temperature and PCB thermal design.
Does the NCP612SQ50T1G require external capacitors, and what values are recommended?
Yes, the NCP612SQ50T1G requires both input (Cin) and output (Cout) capacitors for stability and transient performance. The datasheet specifies 1.0 µF ceramic capacitors for both positions - placed as close as possible to the device pins. These capacitors can be increased (e.g., 2.2–10 µF) to improve load transient response or ripple rejection, and the regulator remains stable across ESR values from near-zero up to 5 Ω.
Is the NCP612SQ50T1G pin-compatible with other variants in the NCP612 family?
Yes, all NCP612 variants - including NCP612SQ15T2G, NCP612SQ33T2G, and NCP612SQ50T2G - share identical SC70-5 pinout and package dimensions. The only differences are output voltage and marking code; electrical behavior (enable function, quiescent current, dropout, protection features) is consistent across the family, enabling drop-in replacement during design iteration or voltage tuning.
What is the operating temperature range specified for the NCP612SQ50T1G?
The NCP612SQ50T1G is rated for operation from −40 °C to +85 °C ambient temperature. This is the standard industrial grade range for the NCP612 series (as opposed to the automotive-grade NCV612, which extends to +125 °C). Output voltage accuracy, dropout, and quiescent current specifications are guaranteed across this full range per the datasheet's electrical characteristics tables.
How does the enable pin function on the NCP612SQ50T1G, and what happens when it's left unconnected?
The enable pin (Pin 3) is active-high: pulling it ≥0.95 V turns the regulator on; pulling it ≤0.3 V disables output and reduces quiescent current to ~0.03 µA. If unused, the pin must be connected directly to Vin - not left floating - to ensure reliable startup and prevent erratic behavior due to noise coupling. The NCP612SQ50T1G will not operate correctly with an open-circuit enable pin.
NCP612SQ50T1G 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):
- 6V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- 90 µA
- PSRR:
- -
- 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)
NCP612SQ50T1G FAQ
1.How can I place an order for NCP612SQ50T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP612SQ50T1G 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 NCP612SQ50T1G reliable?
The price and inventory of NCP612SQ50T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP612SQ50T1G is usually 5 days.
3.What payment methods are accepted for NCP612SQ50T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP612SQ50T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP612SQ50T1G?
NCP612SQ50T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP612SQ50T1G 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 NCP612SQ50T1G?
For technical support, including NCP612SQ50T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP612SQ50T1G requirements.
6.How does Aetrix verify that NCP612SQ50T1G is sourced from the original manufacturer or authorized distributors?
All NCP612SQ50T1G 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 NCP612SQ50T1G meets industry standards.
7.What is the process for return or replacement of NCP612SQ50T1G?
All NCP612SQ50T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP612SQ50T1G, 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 NCP612SQ50T1G part is unused and in its original packaging.
Return procedure for NCP612SQ50T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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