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onsemi NCP612SQ37T2G
- Part No.:
- NCP612SQ37T2G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP612SQ37T2G.pdf
- Description:
- IC REG LINEAR 3.7V 100MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:4,499
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Product details
Overview
NCP612SQ37T2G from onsemi is a fixed-output CMOS low-dropout linear regulator (LDO) designed for battery-powered portable electronics. It delivers 100 mA output current with 3.7 V nominal output voltage, 40 µA typical quiescent current, and 230 mV dropout at 100 mA - enabling extended runtime in handheld instruments and camcorders.
For engineers reviewing the NCP612SQ37T2G datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low IQ, SC70-5 package footprint, ±2.0% output accuracy over −40 °C to +85 °C, enable-controlled standby mode, and ceramic capacitor compatibility without ESR constraints.
Technical Context
The NCP612SQ37T2G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection - eliminating external compensation. Its enable input supports logic-level control (VTH(en) = 0.95 V high, 0.3 V low), and it operates with input voltages from 0 V to 6.0 V while maintaining regulation down to VIN = VOUT + 230 mV at full load.
Designed for stability with 1.0 µF ceramic output capacitors, the device exhibits 100 µVRMS output noise (100 Hz–100 kHz) and >50 dB ripple rejection at 1 kHz. Thermal shutdown activates at ~160 °C, and maximum junction temperature is rated at 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.7 V ±2.0% (ensures stable MCU core or sensor supply under load and temperature variation) |
| Max Output Current | 100 mA (supports single-rail low-power peripherals without derating) |
| Quiescent Current | 40 µA typical (enables >1-year battery life in always-on sensor nodes) |
| Dropout Voltage | 230 mV at 100 mA (allows operation from single Li-ion cell down to 3.93 V) |
| Operating Temp | −40 °C to +85 °C (qualified for industrial and consumer portable environments) |
| Input Voltage Range | 0 V to 6.0 V (compatible with USB, coin-cell, and Li-ion sources) |
| Enable Threshold | 0.95 V (logic-high turn-on; compatible with 1.8 V/3.3 V GPIO) |
Pinout & Package
The NCP612SQ37T2G is housed in the SC70-5 (SOT-353) surface-mount package - measuring 2.0 mm × 2.1 mm × 0.9 mm - optimized for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply rail; must be decoupled with ≥1.0 µF ceramic capacitor near pin |
| 2 | Gnd | Power ground reference; requires low-impedance PCB pour for noise immunity |
| 3 | Enable | Active-high digital control input; connect to Vin if unused to ensure always-on operation |
| 4 | N/C | No internal connection; leave unconnected or float - no routing required |
| 5 | Vout | Regulated 3.7 V output; requires ≥1.0 µF ceramic capacitor directly at pin for stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical enables multi-year battery life in maintenance-free IoT sensors |
| Low dropout architecture | 230 mV at 100 mA allows direct regulation from aging or partially discharged batteries |
| Ceramic capacitor compatibility | Stable with 1.0 µF output cap (no ESR minimum) - reduces BOM count and board area |
| Integrated protection | Thermal shutdown and current limit prevent damage during overload or poor heatsinking |
| Pb-free SC70-5 package | RoHS-compliant 5-pin micro-package supports automated assembly and high-density layouts |
Applications
| Portable Medical Sensors | Wearable Fitness Trackers |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE and analog front-end. IC Role / Device Role / Timing Role: Primary 3.7 V power rail for ADC, RF transceiver, and microcontroller core. Use Value: 40 µA IQ extends coin-cell lifetime beyond 18 months; SC70-5 footprint fits sub-10 mm² sensor module. | Use Scenario: Heart-rate and motion sensing wristband operating from rechargeable Li-poly battery. IC Role / Device Role / Timing Role: Clean, low-noise 3.7 V supply for optical PPG sensor and ARM Cortex-M0+ MCU. Use Value: 100 µVRMS output noise prevents signal corruption in analog photodiode path; enable pin supports sleep/wake cycling. |
| Industrial Handheld Scanners | Smart Remote Controls |
Use Scenario: Barcode scanner with laser diode driver and 2.4 GHz BLE radio. IC Role / Device Role / Timing Role: Secondary regulated rail for logic and interface circuitry, isolated from noisy motor/driver sections. Use Value: 2.0% output accuracy ensures consistent UART timing and flash programming voltage margins across temperature. | Use Scenario: IR/RF universal remote with touch interface and energy-harvesting button cells. IC Role / Device Role / Timing Role: Always-on 3.7 V supply for real-time clock and wake-up controller during deep-sleep mode. Use Value: Enable pin allows full system shutdown (IQ < 1 µA in disable state); 3.7 V matches common lithium-thionyl chloride cell nominal voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3702E/TT | 300 mA max output, 2.0 µA IQ, SOT-23-3 package (no enable) | Lacks enable control; higher current capacity but larger footprint and no shutdown mode | Select when ultra-low IQ is critical and enable functionality is unnecessary |
| TCS2117-3.7 | 150 mA max output, 50 µA IQ, SC70-5 package with enable, ±1.5% accuracy | Slightly tighter voltage tolerance and higher IQ; same pinout and footprint | Select when tighter output accuracy is required and 10 µA higher IQ is acceptable |
Compared with MCP1700T-3702E/TT and TCS2117-3.7, the NCP612SQ37T2G offers optimal balance of ultra-low IQ, enable control, SC70-5 size, and 2.0% accuracy - making it preferred for space- and battery-limited portable designs requiring active power management.
Availability
NCP612SQ37T2G is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, industrial handheld scanners, and smart remote controls requiring stable component supply and long-term manufacturability support.
Supply support for NCP612SQ37T2G 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 devices.
The NCP612SQ37T2G belongs to the NCP612 series of ultra-low-IQ LDOs engineered specifically for battery-powered portable equipment - emphasizing minimal standby power, small form factor, and robustness in variable-temperature field environments.
FAQ
What is the output voltage tolerance of the NCP612SQ37T2G over temperature?
The NCP612SQ37T2G maintains ±2.0% output voltage accuracy across its full operating ambient temperature range of −40 °C to +85 °C at 10 mA load. At 100 mA load and same temperature range, output remains within 1.440 V to 1.560 V for 1.5 V versions - and for the NCP612SQ37T2G specifically, output stays between 3.589 V and 3.811 V. This ensures reliable operation of downstream 3.3 V-tolerant logic without additional margining.
Can the NCP612SQ37T2G be used with ceramic output capacitors?
Yes - the NCP612SQ37T2G is explicitly designed for stability with 1.0 µF ceramic capacitors and does not require minimum ESR. The datasheet confirms stable operation with X5R/X7R types such as TDK C2012X5R1C105K. This eliminates need for tantalum or aluminum electrolytic capacitors, reducing cost, size, and failure risk in portable designs using the NCP612SQ37T2G.
What happens to the NCP612SQ37T2G when the Enable pin is left floating?
The Enable pin of the NCP612SQ37T2G must not be left floating: it has no internal pull-up or pull-down. If unused, the datasheet mandates connection to Vin to guarantee proper startup and regulation. A floating Enable pin may cause erratic behavior - including intermittent dropout or oscillation - because the internal comparator threshold (0.95 V high / 0.3 V low) can be violated by noise coupling, leading to unintended disable cycles during operation of the NCP612SQ37T2G.
Is the NCP612SQ37T2G still in active production?
Yes - unlike the discontinued NCV612SQ37T2G* variant (marked with asterisk in datasheet Table 1), the NCP612SQ37T2G is an active, orderable part per onsemi's official ordering table (page 9). It is shipped in Pb-free SC70-5 tape-and-reel packaging (3,000 units per reel) and supported by full datasheet Rev. 5 (November 2025). Lifecycle status is confirmed active by onsemi distribution channels.
How does thermal performance scale with PCB layout for the NCP612SQ37T2G?
Thermal performance of the NCP612SQ37T2G depends heavily on PCB copper area connected to Pin 2 (Gnd) - which serves as the primary thermal path. With standard JEDEC 2-layer board (1 oz Cu), RJA is 300 °C/W, limiting continuous 100 mA operation to ≤330 mW dissipation (~25 °C ambient). Adding thermal vias and 1-in² copper pour reduces RJA to ~150 °C/W, enabling full 100 mA load at 50 °C ambient - critical for sustained use in the NCP612SQ37T2G's target applications.
NCP612SQ37T2G 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):
- 3.7V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.38V @ 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)
NCP612SQ37T2G FAQ
1.How can I place an order for NCP612SQ37T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP612SQ37T2G 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 NCP612SQ37T2G reliable?
The price and inventory of NCP612SQ37T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP612SQ37T2G is usually 5 days.
3.What payment methods are accepted for NCP612SQ37T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP612SQ37T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP612SQ37T2G?
NCP612SQ37T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP612SQ37T2G 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 NCP612SQ37T2G?
For technical support, including NCP612SQ37T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP612SQ37T2G requirements.
6.How does Aetrix verify that NCP612SQ37T2G is sourced from the original manufacturer or authorized distributors?
All NCP612SQ37T2G 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 NCP612SQ37T2G meets industry standards.
7.What is the process for return or replacement of NCP612SQ37T2G?
All NCP612SQ37T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP612SQ37T2G, 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 NCP612SQ37T2G part is unused and in its original packaging.
Return procedure for NCP612SQ37T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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