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onsemi NCP4620DSQ18T1G
- Part No.:
- NCP4620DSQ18T1G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP4620DSQ18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 150MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:1,114
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Product details
Overview
NCP4620DSQ18T1G from onsemi is a 150 mA, 1.8 V fixed-output CMOS low-dropout linear regulator in SC-70 package, operating from 2.6 V to 10 V input, with ±1.0% output voltage accuracy, 165 mV dropout at 100 mA (3.3 V version reference), and integrated chip enable for power management in space-constrained portable electronics.
For engineers reviewing the NCP4620DSQ18T1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal behavior, enable-controlled shutdown timing, ceramic-capacitor stability, and real-world load/line transient response data specific to the 1.8 V auto-discharge variant in SC-70.
Technical Context
The NCP4620DSQ18T1G implements a CMOS-based LDO architecture with internal N-channel pass transistor, enabling low quiescent current (23 µA) and fast enable/disable control via active-high CE pin. Its auto-discharge function integrates an internal VOUT-to-GND discharge transistor activated during disable mode.
It operates across −40°C to +85°C ambient, supports stable regulation with ≥0.47 µF ceramic output capacitors, and features thermal shutdown (165°C trip, 110°C release) and current fold-back protection. Dropout voltage scales with output voltage-e.g., 0.25 V typical at 1.5–1.8 V output and 150 mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1.0% over −40°C to +85°C - ensures stable core supply for low-voltage microcontrollers and sensors. |
| Max Output Current | 150 mA continuous - sufficient for powering single-core MCUs, RF transceivers, or sensor signal chains. |
| Dropout Voltage | 0.25 V typical at IOUT = 150 mA, VOUT = 1.8 V - enables operation from two Li-ion cells (down to ~2.05 V input). |
| Quiescent Current | 23 µA typical - minimizes battery drain in always-on or sleep-mode applications. |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Enable Threshold | VCEH = 1.7 V min - compatible with 1.8 V or 3.3 V GPIO logic without level-shifting. |
| Thermal Shutdown | 165°C junction trip temperature - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
SC-70-5 (Case 419A) package: 1.25 mm × 2.1 mm footprint, 0.65 mm pitch, 0.95 mm height - optimized for ultra-compact portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; requires local 1 µF ceramic decoupling capacitor. |
| 2 | GND | Power ground reference; must be low-impedance and connected directly to VIN capacitor ground. |
| 3 | CE | Active-high chip enable; internal pull-down ensures default OFF state when unconnected. |
| 4 | VOUT | Regulated 1.8 V output; supports fast auto-discharge via internal transistor when CE = low. |
| 5 | NC | No connection - electrically isolated; no PCB trace or pad required. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Internal VOUT-to-GND discharge path activated during disable - reduces residual output voltage within microseconds for safe system reset. |
| Ceramic capacitor stability | Stable with ≥0.47 µF X5R/X7R ceramic output capacitor - eliminates need for higher-ESR tantalum or electrolytic types. |
| Low temperature drift | ±80 ppm/°C output voltage coefficient - maintains tight regulation across industrial temperature range. |
| High PSRR at 1 kHz | 70 dB attenuation of input ripple - preserves clean 1.8 V rail despite noisy DC-DC input sources. |
| Thermal & current protection | Integrated thermal shutdown (165°C) and fold-back current limiting - prevents damage under short-circuit or overheating conditions. |
Applications
| Wearable Sensor Node | USB-Powered IoT Peripheral |
|---|---|
Use Scenario: Compact wearable device with BLE SoC, MEMS accelerometer, and coin-cell battery. IC Role / Device Role / Timing Role: Primary 1.8 V supply for digital core and analog sensor interface; enables rapid power cycling via CE pin. Use Value: Auto-discharge ensures full reset between BLE advertising intervals; 23 µA quiescent current extends battery life beyond 1 year. |
Use Scenario: USB-powered environmental monitor using 3.3 V host MCU and 1.8 V sensor ICs. IC Role / Device Role / Timing Role: Local LDO generating clean 1.8 V from USB 5 V (via intermediate 3.3 V DC-DC), with CE tied to MCU GPIO for controlled power sequencing. Use Value: 70 dB PSRR rejects USB switcher noise; SC-70 size fits dense USB-C connector layout without compromising thermal margin. |
| Industrial Handheld Scanner | Low-Power Camera Module |
Use Scenario: Rugged handheld barcode scanner powered by 2-cell Li-ion pack (6.0–8.4 V). IC Role / Device Role / Timing Role: Secondary LDO delivering regulated 1.8 V to image sensor interface and FPGA I/O banks. Use Value: 0.25 V dropout allows operation down to 2.05 V input - extends usable battery range into final 15% capacity. |
Use Scenario: Embedded camera module in smart doorbell, requiring fast wake-from-sleep imaging. IC Role / Device Role / Timing Role: Dedicated 1.8 V supply for CIS image sensor core and MIPI D-PHY receiver. Use Value: Sub-10 µs VOUT discharge time (via auto-discharge) eliminates ghost frames during rapid sensor re-initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-1802E/TO | 100 mA max output, no CE pin, no auto-discharge, TO-92 package - larger footprint, lower current capability. | Lacks enable control and fast discharge; suitable only for always-on, non-sequenced rails. | Select when board space permits TO-92 and enable functionality is unnecessary. |
| Torex XC6206P182MR-G | 150 mA, 1.8 V, SOT-23-5, no auto-discharge, 3 µA IQ - lower quiescent current but no VOUT discharge path. | Cannot actively discharge output; requires external circuitry for reset timing control. | Choose for ultra-low-power standby where auto-discharge is handled externally or not required. |
Availability
NCP4620DSQ18T1G is available at Aetrix Electronics and suitable for wearable electronics, USB-powered IoT peripherals, industrial handheld scanners, and low-power camera modules requiring stable component supply with guaranteed Pb-free compliance and tape-and-reel delivery.
Supply support for NCP4620DSQ18T1G 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, sensing, and connectivity solutions for automotive, industrial, and consumer markets.
The NCP4620DSQ18T1G belongs to onsemi's NCP4620 family of low-quiescent-current LDOs designed specifically for battery-powered portable devices requiring precise, low-noise, and enable-controllable voltage regulation.
FAQ
What is the maximum input voltage rating for the NCP4620DSQ18T1G?
The NCP4620DSQ18T1G has an absolute maximum input voltage of 12.0 V, but its recommended operating input range is 2.6 V to 10.0 V. Exceeding 10 V continuously may impact long-term reliability and thermal performance, especially at high ambient temperatures or full load. The device includes internal protection against transient overvoltage up to 12 V per Absolute Maximum Ratings table.
Does the NCP4620DSQ18T1G require an external capacitor on the CE pin?
No, the NCP4620DSQ18T1G does not require an external capacitor on the CE pin. Its CE input has an internal pull-down current source (0.3 µA typical), ensuring reliable low-state default behavior. Adding capacitance could slow enable/disable transitions and degrade power sequencing timing - which contradicts the intended use of the auto-discharge feature in the NCP4620DSQ18T1G.
Can the NCP4620DSQ18T1G be used with a 0.22 µF ceramic output capacitor?
No - the NCP4620DSQ18T1G requires a minimum output capacitance of 0.47 µF (X5R/X7R ceramic) for guaranteed stability, as specified in the datasheet's APPLICATION INFORMATION section. Using 0.22 µF risks oscillation under load transients, particularly at light loads or elevated temperatures, due to insufficient phase margin in the control loop.
How does the auto-discharge function operate in the NCP4620DSQ18T1G?
In the NCP4620DSQ18T1G, the auto-discharge function activates an internal NMOS transistor between VOUT and GND when the CE pin is driven low. This provides a low-impedance discharge path, reducing VOUT to <100 mV within ~10 µs (typical) after disable - critical for clean system resets and avoiding latch-up in downstream logic. The feature is exclusive to "D" suffix variants like NCP4620DSQ18T1G.
What is the thermal resistance (RJA) of the NCP4620DSQ18T1G in its SC-70 package?
The NCP4620DSQ18T1G in SC-70 package has a thermal resistance of RJA = 263°C/W, measured under standard JEDEC JESD51-2 conditions (single-layer 1-in² copper pad). Actual board-level RJA will vary based on PCB copper area, layer count, and airflow; for 150 mA load at 10 V input, junction temperature rise can exceed 100°C without adequate thermal relief - confirming need for proper layout per datasheet guidelines.
NCP4620DSQ18T1G 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):
- 10V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.8V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 40 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (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)
NCP4620DSQ18T1G FAQ
1.How can I place an order for NCP4620DSQ18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4620DSQ18T1G 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 NCP4620DSQ18T1G reliable?
The price and inventory of NCP4620DSQ18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4620DSQ18T1G is usually 5 days.
3.What payment methods are accepted for NCP4620DSQ18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4620DSQ18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4620DSQ18T1G?
NCP4620DSQ18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4620DSQ18T1G 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 NCP4620DSQ18T1G?
For technical support, including NCP4620DSQ18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4620DSQ18T1G requirements.
6.How does Aetrix verify that NCP4620DSQ18T1G is sourced from the original manufacturer or authorized distributors?
All NCP4620DSQ18T1G 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 NCP4620DSQ18T1G meets industry standards.
7.What is the process for return or replacement of NCP4620DSQ18T1G?
All NCP4620DSQ18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP4620DSQ18T1G, 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 NCP4620DSQ18T1G part is unused and in its original packaging.
Return procedure for NCP4620DSQ18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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