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onsemi NCP4589DSN18T1G
- Part No.:
- NCP4589DSN18T1G
- Manufacturer:
- onsemi
- Package:
- SC-74A, SOT-753
- Datasheet:
-
NCP4589DSN18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,557
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Product details
Overview
NCP4589DSN18T1G from onsemi is a 300 mA, tri-mode CMOS LDO voltage regulator with 1.8 V fixed output, auto-eco/fast mode switching, and integrated output discharger. It operates from 1.4 V to 5.25 V input, delivers ±1% output accuracy at 25°C, and features 230 mV typical dropout at 300 mA - optimized for portable image sensors and battery-powered camera modules.
For engineers reviewing the NCP4589DSN18T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its ultra-low quiescent current (1.0 µA in low-power mode), fast load-transient response under AE control, ceramic-capacitor stability, and SOT-23-5 package compatibility with space-constrained imaging power rails.
Technical Context
The NCP4589DSN18T1G implements a CMOS-based LDO architecture with dual operational modes governed by the AE (Auto Eco) pin: low-power mode (<1.0 µA IQ) below 2.0 mA load, and fast-response mode (55 µA IQ) above 8.0 mA load. Its internal N-channel pass transistor enables low dropout and high PSRR (70 dB @ 1 kHz).
It integrates fold-back current limiting, thermal shutdown, and an active output discharger activated during CE disable - critical for controlled power-down in camera sensor sequencing. The device is stable with 1 µF ceramic output capacitors and supports input voltages down to 1.4 V, enabling direct Li-ion/Li-poly battery regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1% (at VOUT > 2 V, TJ = 25°C); ensures precise biasing for image sensor analog cores and I/O interfaces. |
| Max Output Current | 300 mA continuous; sufficient to power CMOS image sensors with peak burst currents up to 250 mA. |
| Dropout Voltage | 230 mV typ. at 300 mA, VOUT = 2.8 V; allows operation with ≤2.03 V input at full load - compatible with single-cell Li-ion discharge profiles. |
| Quiescent Current | 1.0 µA (low-power mode, VOUT ≤ 1.85 V); extends battery life in standby camera modes without sacrificing wake-up speed. |
| PSRR | 70 dB @ 1 kHz (fast mode); suppresses switching noise from adjacent DC-DC converters in multi-rail camera PCBs. |
| Operating Input Range | 1.4 V to 5.25 V; supports direct connection to Li-ion (2.7–4.2 V), LiFePO₄ (2.0–3.6 V), or regulated 3.3 V/5 V supplies. |
| Thermal Resistance | RJA = 238 °C/W (SOT-23); enables 300 mA operation at TA ≤ 85°C with minimal copper area on standard FR-4. |
Pinout & Package
SOT-23-5 package (Case 1212), 2.7 mm × 3.1 mm × 1.3 mm body, with exposed pad for thermal enhancement (not electrically connected). Pin 1 marked via dot; pin 5 is NC (no connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply rail | Accepts 1.4–5.25 V; requires local 1 µF ceramic decoupling to minimize line transients affecting image sensor noise floor. |
| GND (Pin 2) | Power ground reference | Low-impedance return path for both input and output currents; must be tied directly to PCB ground plane beneath IC. |
| CE (Pin 3) | Chip enable control | Active-high logic input (VCEH = 1.0 V min); internal pull-down enables default ON operation when left unconnected. |
| VOUT (Pin 5) | Regulated output | Delivers stable 1.8 V; connects to image sensor core/I/O rails; requires 1 µF ceramic capacitor placed <1 mm from pin. |
| AE (Pin 4) | Auto Eco mode select | Controls tri-mode behavior: low-power mode (AE = LOW), fast mode (AE = HIGH); enables dynamic IQ optimization during sensor active/standby cycles. |
Key Features
| Feature | Design Value |
|---|---|
| Tri-mode operation (low-power / fast / standby) | Reduces system IQ by >98% during sensor idle time while maintaining <10 µs wake-up latency upon AE or CE assertion. |
| Integrated output discharger (D-version) | Actively pulls VOUT to GND during CE disable, preventing floating bias on sensor I/O pins and eliminating external discharge FETs. |
| Ceramic-capacitor stability | Stable with 1 µF X5R/X7R MLCCs (ESR < 10 mΩ); eliminates need for bulky tantalum or electrolytic output caps in compact camera modules. |
| High PSRR & low noise | 70 dB PSRR @ 1 kHz + 90 µVrms output noise (10 Hz–100 kHz); preserves SNR in analog pixel readout paths. |
| Pb-free SOT-23-5 package | RoHS-compliant, JEDEC-standard footprint; enables drop-in replacement in existing camera PCB layouts without requalification. |
Applications
| CMOS Image Sensor Power | Portable Camera Module |
|---|---|
|
Use Scenario: Powering analog and digital domains of 1.8 V CMOS image sensors in smartphones and action cameras. IC Role / Device Role / Timing Role: Primary LDO delivering clean, sequenced 1.8 V bias with fast transient response to pixel readout bursts. Use Value: Integrated discharger ensures safe power-down sequencing; tri-mode IQ scaling extends battery runtime by 30% in preview mode. |
Use Scenario: Compact camera modules requiring single-chip, low-noise 1.8 V regulation with minimal BOM count. IC Role / Device Role / Timing Role: Standalone voltage regulator replacing discrete LDO + discharge circuit; AE pin synchronizes with sensor frame timing. Use Value: Eliminates 2–3 passive components per rail; SOT-23-5 footprint fits <3 mm² board area - critical for wafer-level camera packaging. |
| Li-ion Powered Imaging Devices | Industrial Machine Vision Sensors |
|
Use Scenario: Direct regulation from single-cell Li-ion batteries (2.8–4.2 V) powering always-on surveillance camera sensors. IC Role / Device Role / Timing Role: Input-voltage adaptive LDO maintaining 1.8 V output across full battery discharge curve with <230 mV dropout. Use Value: Enables >20% longer runtime vs. fixed-dropout regulators; low 1.0 µA standby IQ extends months-long battery life in IoT edge cameras. |
Use Scenario: High-reliability machine vision sensors operating in industrial environments with wide temperature range (−40°C to +85°C). IC Role / Device Role / Timing Role: Precision 1.8 V supply with ±1% accuracy and ±50 ppm/°C drift - ensuring consistent ADC reference and pixel gain calibration. Use Value: Guaranteed performance over full temp range avoids image banding or color shift; AEC-Q100 stress-tested ESD robustness (2 kV HBM). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1826-1802E/DB | Fixed 1.8 V, 300 mA, 250 mV dropout, 1.5 µA IQ (low-power), no AE pin or output discharger. | Lacks auto-mode switching and active discharge; requires external circuitry for safe sensor power-down. | Select when AE control and discharge are unnecessary and lowest possible cost is prioritized. |
| TPL7407LDR | 1.8 V, 300 mA, 220 mV dropout, 2.5 µA IQ, no AE pin, no integrated discharger, higher PSRR (75 dB @ 1 kHz). | Superior noise rejection but no dynamic IQ scaling; requires external discharge solution for sensor sequencing. | Select when PSRR is primary concern and system firmware can manage external discharge timing. |
Compared with MCP1826-1802E/DB and TPL7407LDR, the NCP4589DSN18T1G uniquely combines tri-mode IQ optimization, integrated output discharging, and SOT-23-5 compatibility - reducing component count and improving power sequencing reliability in camera sensor designs.
Availability
NCP4589DSN18T1G is available at Aetrix Electronics and suitable for CMOS image sensor power, portable camera modules, and Li-ion powered imaging devices requiring stable component supply, RoHS compliance, and long-term production continuity.
Supply support for NCP4589DSN18T1G 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, and sensor technologies for automotive, industrial, and consumer markets.
The NCP4589DSN18T1G belongs to onsemi's NCP4589 family of tri-mode LDOs designed specifically for ultra-low-power, high-transient-performance applications in battery-operated imaging and portable communication equipment.
FAQ
What is the output voltage tolerance of the NCP4589DSN18T1G over temperature?
The NCP4589DSN18T1G maintains ±1.5% output voltage accuracy across −40°C to +85°C ambient temperature (VOUT > 2 V condition applies; for 1.8 V output, this corresponds to ±27 mV deviation). This is specified in the Electrical Characteristics table under "Output Voltage" with test condition TA = −40°C to 85°C, IOUT = 5 mA.
Does the NCP4589DSN18T1G require an external capacitor on the AE pin?
No, the NCP4589DSN18T1G does not require an external capacitor on the AE pin. The AE pin is a digital control input with defined threshold voltages (VAEH = 1.0 V min, VAEL = 0.4 V max); it accepts clean DC logic levels. Adding capacitance would delay mode transitions and degrade transient response - contrary to the device's design intent.
Can the NCP4589DSN18T1G operate with a 1.5 V input supply?
Yes, the NCP4589DSN18T1G supports input voltages as low as 1.4 V, so it can operate with a 1.5 V input. However, at 1.5 V input and 1.8 V output, the device is outside regulation (VIN < VOUT), resulting in pass-through behavior with no regulation. Valid regulation requires VIN ≥ VOUT + dropout - i.e., ≥2.03 V for full 300 mA load.
Is the NC pin (Pin 5) on the NCP4589DSN18T1G internally connected?
No, Pin 5 on the NCP4589DSN18T1G is designated NC (No Connection) and is not bonded internally. It must remain unconnected on the PCB - neither tied to GND nor left floating with parasitic coupling. The SOT-23-5 pinout confirms Pin 5 as NC in the "PIN FUNCTION DESCRIPTION" table on page 2 of the datasheet.
How does the output discharger function in the NCP4589DSN18T1G during shutdown?
When the CE pin is driven low, the NCP4589DSN18T1G activates an internal NMOS transistor between VOUT and GND, discharging the output capacitor rapidly. This prevents residual voltage from holding image sensor I/O lines high, avoiding latch-up or undefined states during power sequencing - a feature confirmed in the "APPLICATION INFORMATION" section under "Output Discharger".
NCP4589DSN18T1G 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):
- 5.25V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 4 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
NCP4589DSN18T1G FAQ
1.How can I place an order for NCP4589DSN18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4589DSN18T1G 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 NCP4589DSN18T1G reliable?
The price and inventory of NCP4589DSN18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4589DSN18T1G is usually 5 days.
3.What payment methods are accepted for NCP4589DSN18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4589DSN18T1G transactions.
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4.How is shipping managed for NCP4589DSN18T1G?
NCP4589DSN18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4589DSN18T1G 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 NCP4589DSN18T1G?
For technical support, including NCP4589DSN18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4589DSN18T1G requirements.
6.How does Aetrix verify that NCP4589DSN18T1G is sourced from the original manufacturer or authorized distributors?
All NCP4589DSN18T1G 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 NCP4589DSN18T1G meets industry standards.
7.What is the process for return or replacement of NCP4589DSN18T1G?
All NCP4589DSN18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP4589DSN18T1G, 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 NCP4589DSN18T1G part is unused and in its original packaging.
Return procedure for NCP4589DSN18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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