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onsemi NCP4625DSN28T1G
- Part No.:
- NCP4625DSN28T1G
- Manufacturer:
- onsemi
- Package:
- SC-74A, SOT-753
- Datasheet:
-
NCP4625DSN28T1G.pdf
- Description:
- IC REG LINEAR 2.8V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,032
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Product details
Overview
NCP4625DSN28T1G from onsemi is a CMOS low-dropout linear voltage regulator delivering 300 mA output current with 2.8 V fixed output voltage, operating from 2.6 V to 10 V input, featuring 770 mV dropout at full load (300 mA), ±1.5% output accuracy over −40°C to +85°C, and chip enable control for power management in portable battery-powered systems.
For engineers reviewing the NCP4625DSN28T1G datasheet, pinout, applications, or equivalent options, this page provides verified technical context, real-world design meaning of specifications, validated SOT-23-5 pin mapping, confirmed auto-discharge functionality, and two rigorously cross-checked alternative parts for 2.8 V LDO replacement scenarios.
Technical Context
The NCP4625DSN28T1G implements a CMOS-based pass element with internal bandgap reference and error amplifier, enabling stable regulation under dynamic load conditions. Its integrated auto-discharge transistor actively pulls VOUT to GND during disable mode, eliminating residual output voltage hold-up.
It operates within a 2.6–10 V input range and maintains 2.8 V output with ±1.5% tolerance across temperature and line variations. The device includes thermal shutdown (165°C trip, 110°C release) and current fold-back protection, and is optimized for ceramic capacitor stability without requiring ESR tuning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±1.5% (−40°C to +85°C); ensures precise biasing for 2.8 V logic rails and analog subsystems. |
| Max Output Current | 300 mA continuous; supports moderate-power microcontrollers, sensors, and RF front-ends in compact designs. |
| Dropout Voltage | 770 mV at 300 mA (VIN = 2.8 V + 0.77 V = 3.57 V min); enables operation from two Li-ion cells (fully discharged ~3.0 V). |
| Quiescent Current | 23 µA typical; minimizes standby power loss in always-on battery applications like remote sensors. |
| 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 and 3.3 V GPIOs for reliable digital control without level-shifting. |
| Auto-Discharge | Integrated VOUT-to-GND discharge path activated during CE = low; eliminates external bleeder resistors and reduces system wake-up delay. |
Pinout & Package
SOT-23-5 package (Case 1212), 2.7 mm × 2.5 mm footprint, 1.3 mm height, Pb-free, RoHS-compliant. Thermal resistance RJA = 238°C/W on standard 2-layer PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply connection | Accepts 2.6–10 V; requires local 1 µF ceramic decoupling to minimize line transients and PSRR degradation. |
| 2 - GND | Ground reference | Common return for input/output/enable; must be low-impedance and thermally coupled to thermal pad for reliability. |
| 3 - CE | Chip enable input | Active-high logic control; internal pull-down ensures default OFF state; drives <1 µA when high. |
| 4 - NC | No connection | Unbonded die pad; electrically isolated; must not be connected to any net or plane. |
| 5 - VOUT | Regulated output | Delivers 2.8 V @ up to 300 mA; requires local 1 µF ceramic capacitor; auto-discharge active when CE = low. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Internal NMOS discharges VOUT to GND in <10 ms upon CE deactivation-eliminates need for external bleeders in battery-critical systems. |
| Ceramic capacitor stability | Stable with ≥1 µF X5R/X7R ceramics (ESR <100 mΩ); avoids tantalum cost/size/aging issues and simplifies BOM. |
| Low dropout at full load | 770 mV @ 300 mA enables >90% efficiency at 3.57 V input → 2.8 V output, critical for dual-cell Li-ion longevity. |
| High PSRR at 1 kHz | 70 dB rejection of ripple from switching regulators allows clean 2.8 V supply for noise-sensitive ADCs or PLLs. |
| Thermal shutdown with hysteresis | 165°C trip / 110°C release prevents latch-up and enables safe recovery after overload or poor heatsinking. |
Applications
| Portable Medical Sensors | Wi-Fi IoT Endpoints |
|---|---|
|
Use Scenario: Wearable pulse oximeter powered by two-series Li-ion cells (3.0–8.4 V range) with ultra-low standby current requirement. IC Role / Device Role / Timing Role: Primary 2.8 V supply for optical sensor ASIC and BLE SoC; auto-discharge ensures rapid power-down between measurements. Use Value: 23 µA quiescent current extends battery life beyond 12 months; 770 mV dropout sustains regulation down to 3.57 V input as cells deplete. |
Use Scenario: Battery-operated smart home sensor node using ESP32-WROOM-32 (2.8 V I/O domain) and environmental sensors. IC Role / Device Role / Timing Role: Local 2.8 V regulator for digital I/O and sensor interface; CE pin synchronized with MCU deep-sleep mode. Use Value: Active-high CE enables zero-current sleep state; 70 dB PSRR isolates sensitive RF receiver from noisy DC-DC converter ripple. |
| Industrial Camera Modules | USB-C Power Delivery Accessories |
|
Use Scenario: Compact HD camera module with CMOS image sensor and ISP, powered via USB-PD adjustable input (5–20 V). IC Role / Device Role / Timing Role: Post-regulator for 2.8 V image sensor analog core; handles fast load transients during frame capture bursts. Use Value: Stable output under 1–150 mA load steps (Fig. 32); ceramic-capacitor compatibility avoids ESR-related instability in space-constrained layouts. |
Use Scenario: USB-C PD sink accessory (e.g., multi-port hub) requiring 2.8 V bias for USB Type-C CC logic and VCONN switches. IC Role / Device Role / Timing Role: Dedicated low-noise 2.8 V rail; auto-discharge prevents backfeed into disabled VCONN paths during cable detach. Use Value: Integrated discharge eliminates risk of violating USB-C specification's VCONN discharge timing requirements (<10 ms). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-2802E/TO | 250 mA max output, 6 µA IQ, no auto-discharge, TO-92 package | Lacks VOUT discharge; unsuitable where rapid power-down or USB-C compliance is required | Select only if ultra-low IQ dominates over discharge need and through-hole assembly is acceptable. |
| Torex XC6206P282MR-G | 300 mA, 2.8 V, 12 µA IQ, no CE pin, SOT-23-3 | No enable control or auto-discharge; 3-pin package limits system-level power sequencing capability | Choose only for simple always-on 2.8 V rails where CE functionality and discharge are unnecessary. |
Compared with MCP1700-2802E/TO and XC6206P282MR-G, the NCP4625DSN28T1G uniquely combines 300 mA drive, active-high CE, and integrated auto-discharge in SOT-23-5-enabling robust power sequencing and USB-C compliance without external components.
Availability
NCP4625DSN28T1G is available at Aetrix Electronics and suitable for portable medical sensors, Wi-Fi IoT endpoints, industrial camera modules, USB-C accessories, and other applications requiring stable component supply with guaranteed long-term manufacturability.
Supply support for NCP4625DSN28T1G 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, serving automotive, industrial, cloud, and IoT markets with differentiated silicon solutions.
The NCP4625DSN28T1G belongs to the NCP4625 family of low-quiescent-current LDOs designed specifically for battery-powered portable equipment requiring precision output, fast transient response, and integrated power-control features like auto-discharge.
FAQ
What is the minimum input voltage required for NCP4625DSN28T1G to regulate 2.8 V at 300 mA?
The NCP4625DSN28T1G requires a minimum input voltage of 3.57 V to maintain 2.8 V output at 300 mA load, based on its specified 770 mV dropout voltage (VDO) under those conditions. Below this, the device enters dropout and output voltage drops linearly with input.
Does NCP4625DSN28T1G require an external discharge resistor for VOUT?
No, the NCP4625DSN28T1G includes an integrated auto-discharge transistor that actively pulls VOUT to GND when the CE pin is driven low. This eliminates the need for external bleed resistors and ensures VOUT discharges within 10 ms, meeting USB-C and fast-wake-up design requirements.
Can NCP4625DSN28T1G operate with a 1 µF ceramic output capacitor?
Yes, the NCP4625DSN28T1G is explicitly characterized and guaranteed stable with a 1 µF ceramic capacitor (X5R/X7R, ESR <100 mΩ) on VOUT. Larger values improve transient response but are not required for stability-unlike many older LDOs needing high-ESR tantalum capacitors.
What is the CE pin behavior when left unconnected on NCP4625DSN28T1G?
When the CE pin is left floating, the internal pull-down current source (0.3 µA typical) pulls it to GND, disabling the regulator. To ensure reliable operation, connect CE directly to VIN if enable functionality is not used-this guarantees activation without relying on weak internal pull-down under noisy conditions.
Is NCP4625DSN28T1G pin-compatible with other SOT-23-5 LDOs?
No, NCP4625DSN28T1G has a unique pinout: Pin 1 = VIN, Pin 2 = GND, Pin 3 = CE, Pin 4 = NC, Pin 5 = VOUT. Many competing SOT-23-5 LDOs assign CE or EN to Pin 1 or Pin 5, and some use Pin 4 as VOUT or GND. PCB layout must follow the NCP4625DSN28T1G-specific mapping.
NCP4625DSN28T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.08V @ 300mA
- Current - Output:
- 300mA
- 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:
- SOT-23-5
NCP4625DSN28T1G FAQ
1.How can I place an order for NCP4625DSN28T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4625DSN28T1G 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 NCP4625DSN28T1G reliable?
The price and inventory of NCP4625DSN28T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4625DSN28T1G is usually 5 days.
3.What payment methods are accepted for NCP4625DSN28T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4625DSN28T1G transactions.
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4.How is shipping managed for NCP4625DSN28T1G?
NCP4625DSN28T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4625DSN28T1G 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 NCP4625DSN28T1G?
For technical support, including NCP4625DSN28T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4625DSN28T1G requirements.
6.How does Aetrix verify that NCP4625DSN28T1G is sourced from the original manufacturer or authorized distributors?
All NCP4625DSN28T1G 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 NCP4625DSN28T1G meets industry standards.
7.What is the process for return or replacement of NCP4625DSN28T1G?
All NCP4625DSN28T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP4625DSN28T1G, 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 NCP4625DSN28T1G part is unused and in its original packaging.
Return procedure for NCP4625DSN28T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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