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onsemi NCP4589DSQ18T1G
- Part No.:
- NCP4589DSQ18T1G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP4589DSQ18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 300MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:2,564
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Product details
Overview
NCP4589DSQ18T1G from onsemi is a 300 mA tri-mode CMOS LDO voltage regulator with 1.8 V fixed output, operating from 1.4 V to 5.25 V input. It features automatic switching between low-power (1.0 µA quiescent current) and fast-response (55 µA, 70 dB PSRR at 1 kHz) modes based on load current, plus a dedicated Auto Eco (AE) pin for forced mode selection. It is used in portable image sensors and battery-powered camera modules where ultra-low standby power and fast transient response are critical.
For engineers reviewing the NCP4589DSQ18T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 230 mV dropout at 300 mA (VOUT = 2.8 V), ±1% output accuracy above 2 V, stable operation with 1 µF ceramic capacitors, and SC−70 package compatibility with space-constrained PCB layouts.
Technical Context
The NCP4589DSQ18T1G implements a tri-mode architecture: low-power mode (≤1.0 µA IQ) below 1–2 mA load, fast mode (55 µA IGND, 70 dB PSRR) above ~8 mA, and standby mode (0.1 µA) when CE is low. Its internal N-channel pass transistor delivers 230 mV typical dropout at full 300 mA load for 1.8 V output.
Mode transitions are controlled by internal comparators monitoring output current via sense circuitry; the AE pin provides external override capability. The device includes fold-back current limiting and integrates an output discharger (D-version) for rapid VOUT discharge during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1% (at VOUT > 2 V, TJ = 25°C); ensures stable core bias for image sensor analog blocks |
| Max Output Current | 300 mA continuous; supports peak pixel readout currents in compact camera modules |
| Dropout Voltage | 230 mV typ. at 300 mA, VOUT = 2.8 V; enables regulation from 2.03 V input for 1.8 V rail |
| Quiescent Current | 1.0 µA in low-power mode (VOUT ≤ 1.85 V); extends battery life in always-on imaging subsystems |
| PSRR | 70 dB at 1 kHz (fast mode); suppresses noise from noisy shared PMIC rails in multi-rail systems |
| Operating Input Range | 1.4 V to 5.25 V; compatible with single-cell Li-ion (2.7–4.2 V), LiFePO4, or regulated 3.3 V/5 V supplies |
| Accuracy vs Temp | ±50 ppm/°C output voltage drift; maintains ADC reference stability across −40°C to +85°C |
Pinout & Package
Package: SC−70−5 (Case 419A−02), 1.8 mm × 1.3 mm × 0.9 mm, Pb-free, moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 1.4–5.25 V; requires local 1 µF ceramic decoupling per layout guidelines |
| GND | Power ground reference | Low-impedance return path; must be routed with minimal trace length to VIN/CIN |
| CE | Chip enable control | Active-high logic input; internal pull-down allows tie-to-VIN for always-on operation |
| VOUT | Regulated output | Delivers 1.8 V ±1%; connects to 1 µF ceramic capacitor placed adjacent to pin |
| AE | Auto Eco mode select | Logic input: low = auto-switching mode, high = forced fast mode; no internal pull-up/down |
Key Features
| Feature | Design Value |
|---|---|
| Tri-mode dynamic current optimization | Switches automatically between 1.0 µA low-power and 55 µA fast mode based on real-time load, eliminating manual mode control |
| Integrated output discharger (D-version) | Active transistor between VOUT and GND ensures rapid discharge of output capacitance during disable, preventing latch-up in cascaded power domains |
| Stable with 1 µF ceramic output capacitor | Eliminates need for larger or higher-ESR tantalum capacitors, reducing BOM cost and board area in portable designs |
| Fold-back current limiting | Reduces output current and voltage during overload, protecting downstream circuitry without triggering system reset |
| SC−70−5 footprint | Enables high-density placement in space-constrained camera modules and wearable imaging devices |
Applications
| Image Sensor Power Management | Portable Camera Module |
|---|---|
Use Scenario: Powering analog and digital cores of CMOS image sensors in smartphones and action cameras. IC Role / Device Role / Timing Role: Primary 1.8 V LDO delivering clean, low-noise bias to sensor analog front-end and I/O interface. Use Value: 70 dB PSRR at 1 kHz suppresses switching noise from shared PMIC, preserving SNR in low-light capture. | Use Scenario: Compact camera modules requiring ultra-low quiescent current during standby and fast wake-up response. IC Role / Device Role / Timing Role: System-level 1.8 V rail regulator with AE pin enabling firmware-controlled mode switching for power-state optimization. Use Value: 1.0 µA quiescent current in low-power mode extends battery runtime in always-on vision applications. |
| Wearable Health Imaging | Industrial Machine Vision Sensor |
Use Scenario: Optical heart-rate monitors and pulse oximeters using small-area photodiode arrays. IC Role / Device Role / Timing Role: Low-noise 1.8 V supply for precision analog signal chain and ADC reference. Use Value: ±1% output accuracy and ±50 ppm/°C drift ensure consistent gain calibration across temperature ranges. | Use Scenario: Embedded machine vision sensors in factory automation equipment with wide ambient temperature variation. IC Role / Device Role / Timing Role: Robust 1.8 V regulator supporting 300 mA peak current during image burst capture. Use Value: 230 mV dropout enables reliable operation down to 2.03 V input, accommodating brown-out conditions on 2.5 V system rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | Fixed 1.8 V, 250 mA, 1.6 µA IQ, no tri-mode or AE pin; SC−70 package | Lacks auto-switching and fast transient response; suitable only for static low-current loads | Select when design requires lowest possible quiescent current and does not demand dynamic load response. |
| TZB72018001000 | 1.8 V, 300 mA, 2.5 µA IQ, no AE pin or tri-mode; XDFN1212 package | No mode control or output discharger; smaller 1.2×1.2 mm footprint but lower thermal performance | Choose for ultra-compact layouts where thermal derating below 200 mA is acceptable. |
Compared with MCP1700T-1802E/TT and TZB72018001000, the NCP4589DSQ18T1G uniquely delivers adaptive power efficiency via tri-mode operation and integrated output discharge-critical for battery-operated imaging systems requiring both microamp standby and millisecond-scale transient recovery.
Availability
NCP4589DSQ18T1G is available at Aetrix Electronics and suitable for portable camera modules, wearable health imaging devices, and industrial machine vision sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP4589DSQ18T1G 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 manufacturer specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, and consumer markets.
The NCP4589 family is designed for ultra-low-power, high-transient-performance LDO applications in battery-powered imaging and portable communication equipment, emphasizing adaptive efficiency and small-footprint integration.
FAQ
What is the output voltage tolerance of the NCP4589DSQ18T1G over temperature?
The NCP4589DSQ18T1G provides ±1% output voltage accuracy for VOUT > 2 V at TJ = 25°C. Over the full operating temperature range (−40°C to +85°C), output voltage deviation is specified as ±2.5% for VOUT > 2 V, and ±30 mV for VOUT ≤ 2 V. Its output voltage temperature coefficient is ±50 ppm/°C, ensuring predictable drift in thermal cycling environments.
How does the AE pin affect the operation of the NCP4589DSQ18T1G?
The AE pin on the NCP4589DSQ18T1G selects between automatic tri-mode switching and forced fast mode. When AE is low (≤0.4 V), the device dynamically switches between low-power and fast modes based on load current. When AE is high (≥1.0 V), it remains permanently in fast mode-enabling consistent 70 dB PSRR and rapid transient response regardless of load, at the cost of higher quiescent current (55 µA).
Can the NCP4589DSQ18T1G operate with input voltages below 1.8 V?
Yes-the NCP4589DSQ18T1G operates with input voltages as low as 1.4 V, making it functional even when powered from partially discharged single-cell batteries. However, dropout voltage increases significantly below VIN = VOUT + 0.23 V; at 300 mA load, minimum functional input is ~2.03 V. Below that, regulation is lost and VOUT follows VIN minus dropout.
What is the purpose of the output discharger function in the NCP4589DSQ18T1G?
The NCP4589DSQ18T1G (D-version) integrates an internal NMOS transistor between VOUT and GND that activates during shutdown (CE low). This rapidly discharges the output capacitor, preventing residual voltage from interfering with downstream logic sequencing or causing latch-up in cascaded power domains-essential in multi-rail camera sensor systems.
Is the NCP4589DSQ18T1G stable with ceramic capacitors, and what value is recommended?
Yes-the NCP4589DSQ18T1G is explicitly characterized and guaranteed stable with a 1 µF ceramic output capacitor (X5R/X7R), placed as close as possible to the VOUT and GND pins. Larger values improve transient response but may risk instability if multiple ceramics are paralleled; tantalum capacitors are discouraged due to ESR-related oscillation risks.
NCP4589DSQ18T1G 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):
- 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:
- SC-88A (SC-70-5/SOT-353)
NCP4589DSQ18T1G FAQ
1.How can I place an order for NCP4589DSQ18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4589DSQ18T1G 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 NCP4589DSQ18T1G reliable?
The price and inventory of NCP4589DSQ18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4589DSQ18T1G is usually 5 days.
3.What payment methods are accepted for NCP4589DSQ18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4589DSQ18T1G transactions.
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4.How is shipping managed for NCP4589DSQ18T1G?
NCP4589DSQ18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4589DSQ18T1G 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 NCP4589DSQ18T1G?
For technical support, including NCP4589DSQ18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4589DSQ18T1G requirements.
6.How does Aetrix verify that NCP4589DSQ18T1G is sourced from the original manufacturer or authorized distributors?
All NCP4589DSQ18T1G 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 NCP4589DSQ18T1G meets industry standards.
7.What is the process for return or replacement of NCP4589DSQ18T1G?
All NCP4589DSQ18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP4589DSQ18T1G, 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 NCP4589DSQ18T1G part is unused and in its original packaging.
Return procedure for NCP4589DSQ18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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