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onsemi NCP4589DSQ12T1G
- Part No.:
- NCP4589DSQ12T1G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP4589DSQ12T1G.pdf
- Description:
- IC REG LINEAR 1.2V 300MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:1,145
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Product details
Overview
NCP4589DSQ12T1G from onsemi is a 300 mA, tri-mode CMOS LDO voltage regulator with 1.2 V fixed output, Auto Eco (AE) pin control, and integrated output discharge. 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 battery-powered image sensors and portable communication devices.
For engineers reviewing the NCP4589DSQ12T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its fast/light-load mode switching threshold (1–8 mA), ultra-low standby current (0.1 µA), ceramic-capacitor stability, and SC-70 package thermal performance (RJA = 263 °C/W).
Technical Context
The NCP4589DSQ12T1G implements a tri-mode architecture: Fast Mode (55 µA quiescent current, 70 dB PSRR at 1 kHz), Low Power Mode (1.0–1.5 µA, active below ~3 mA load), and Standby Mode (0.1 µA, CE = low). Its AE pin enables permanent Fast Mode or automatic Eco switching based on output voltage level.
Internally, it uses an N-channel pass transistor with fold-back current limiting and integrates an output discharge FET (D-version feature) for rapid VOUT ramp-down during disable. The regulator maintains stability with ≥1 µF ceramic output capacitance and exhibits <±50 ppm/°C output voltage drift over −40 to +85 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±1% (at VOUT > 2 V, TJ = 25 °C); ensures precise core biasing for low-voltage image sensor ICs |
| Max Output Current | 300 mA continuous; supports peak loads in camera auto-focus actuators and ISP power domains |
| Dropout Voltage | 230 mV typ. at 300 mA, VOUT = 2.8 V; enables operation down to ~1.43 V input for 1.2 V output |
| Quiescent Current | 1.0 µA (Low Power Mode, VOUT ≤ 1.85 V); extends battery life in always-on sensor wake-up circuits |
| PSRR | 70 dB at 1 kHz (Fast Mode); suppresses noise from shared PMIC rails in multi-rail portable systems |
| Operating Input Range | 1.4 V to 5.25 V; compatible with single-cell Li-ion (2.7–4.2 V), Li-polymer, and 3.3 V system rails |
| Thermal Resistance | RJA = 263 °C/W (SC-70); requires minimal PCB copper area for 300 mA operation at 85 °C ambient |
Pinout & Package
Package: SC-70-5 (Case 419A-02), 1.8 × 1.2 × 0.9 mm, Pb-free, moisture sensitivity level 1.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input supply connection | Accepts 1.4–5.25 V; requires local 1 µF ceramic decoupling to minimize line transients |
| 2 (GND) | Ground reference | Common return path for input/output currents; must be low-impedance to avoid PSRR degradation |
| 3 (CE) | Chip enable control | Active-high logic input; internal pull-down allows direct tie-to-VIN for always-on operation |
| 4 (VOUT) | Regulated output | Delivers stable 1.2 V; connects to 1 µF ceramic capacitor placed adjacent to pin for stability |
| 5 (AE) | Auto Eco mode select | Drives Fast Mode when high (≥1.0 V); enables automatic light-load Eco mode when low (≤0.4 V) |
Key Features
| Feature | Design Value |
|---|---|
| Tri-mode dynamic current optimization | Switches between 0.1 µA (standby), 1.0 µA (eco), and 55 µA (fast) based on load and AE pin state |
| Integrated output discharge | Active discharge path from VOUT to GND during shutdown; reduces residual voltage decay time by >10× vs. passive RC |
| Ceramic capacitor stability | Stable with ≥1 µF X5R/X7R ceramics; eliminates need for higher-ESR tantalum or aluminum electrolytics |
| High PSRR in Fast Mode | 70 dB @ 1 kHz enables clean power delivery to noise-sensitive analog blocks (e.g., ADCs, PLLs) |
| Low dropout across voltage range | 230 mV @ 300 mA (2.8 V output); supports 1.2 V rail generation from partially discharged batteries |
Applications
| Mobile Camera Modules | Wearable Health Sensors |
|---|---|
Use Scenario: Powering CIS (CMOS Image Sensor) analog and digital cores in smartphone front/rear cameras. IC Role / Device Role / Timing Role: Primary 1.2 V LDO for sensor pixel array and column ADC, synchronized to frame capture timing. Use Value: Tri-mode operation extends battery runtime during preview (light load) and video recording (heavy load) without compromising transient response. |
Use Scenario: Supplying ultra-low-power optical heart-rate monitor (PPG) ASICs in smartwatches and fitness bands. IC Role / Device Role / Timing Role: Always-on 1.2 V rail for PPG LED driver and signal chain; enabled via AE pin for adaptive current scaling. Use Value: 1.0 µA eco-mode current enables multi-week operation on coin-cell batteries while maintaining fast wake-up capability. |
| Portable Medical Imaging | IoT Edge Node Processors |
Use Scenario: Biasing low-noise amplifiers and ADCs in handheld ultrasound probes. IC Role / Device Role / Timing Role: Clean 1.2 V supply for analog front-end; PSRR performance critical during RF transmit/receive switching. Use Value: 70 dB PSRR at 1 kHz rejects switching noise from nearby DC-DC converters, preserving SNR in sub-100 µV signals. |
Use Scenario: Powering Cortex-M0+/M4 microcontroller cores and BLE radio subsystems in battery-operated industrial sensors. IC Role / Device Role / Timing Role: Core voltage regulator activated only during sensor readout and BLE transmission bursts. Use Value: Integrated output discharge ensures rapid VOUT collapse between active cycles, preventing leakage-induced MCU latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1202E/TT | 250 mA max, 6 µA quiescent (fixed), no AE pin or output discharge | Lacks tri-mode switching and fast transient recovery; suitable only for static low-current loads | Select when cost sensitivity outweighs dynamic efficiency and discharge requirements |
| Torex XC6210B122MR-G | 300 mA, 1.0 µA IQ (eco), no integrated discharge, SC-70-5 pinout differs (VOUT on pin 3) | Requires external discharge circuit; pinout mismatch prevents drop-in replacement | Choose if board layout allows re-routing and external FET discharge is acceptable |
Compared with MCP1700T-1202E/TT and XC6210B122MR-G, the NCP4589DSQ12T1G uniquely combines 300 mA capability, tri-mode current optimization, and integrated discharge in SC-70 - enabling both extended battery life and robust power sequencing in space-constrained imaging systems.
Availability
NCP4589DSQ12T1G is available at Aetrix Electronics and suitable for mobile camera modules, wearable health sensors, and portable medical imaging equipment requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for NCP4589DSQ12T1G 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, cloud, and consumer markets.
The NCP4589DSQ12T1G belongs to onsemi's precision LDO family designed specifically for battery-powered imaging and portable electronics - emphasizing ultra-low quiescent current, fast transient response, and compact packaging for space-constrained PCBs.
FAQ
What is the function of the AE pin on the NCP4589DSQ12T1G?
The AE (Auto Eco) pin on the NCP4589DSQ12T1G selects operating mode: pulled low (≤0.4 V) enables automatic switching between Low Power Mode (<3 mA load) and Fast Mode (>8 mA load); pulled high (≥1.0 V) forces permanent Fast Mode. This pin directly controls quiescent current and transient response trade-offs in the NCP4589DSQ12T1G.
Does the NCP4589DSQ12T1G require an external discharge circuit?
No. The NCP4589DSQ12T1G is the "D" version, which integrates an internal discharge FET between VOUT and GND. When CE is driven low, this FET actively pulls VOUT to ground, eliminating the need for external resistors or MOSFETs - a key differentiator versus standard LDOs like the NCP4589S variants.
What is the minimum input voltage needed to maintain regulation for the NCP4589DSQ12T1G?
The minimum input voltage for the NCP4589DSQ12T1G depends on load: at 300 mA output, dropout is 230 mV typ., so VIN must be ≥1.43 V (1.2 V + 0.23 V). At lighter loads (e.g., 1 mA), dropout drops to ~100 mV, allowing VIN as low as 1.3 V while maintaining regulation - critical for end-of-battery-life operation.
Can the NCP4589DSQ12T1G be used with ceramic output capacitors?
Yes. The NCP4589DSQ12T1G is explicitly characterized and guaranteed stable with ≥1 µF X5R/X7R ceramic capacitors. Unlike older LDOs, it does not require high-ESR tantalum or aluminum electrolytic capacitors - simplifying BOM, reducing footprint, and improving reliability in the NCP4589DSQ12T1G design.
What is the thermal performance of the NCP4589DSQ12T1G in SC-70 package?
The NCP4589DSQ12T1G in SC-70 package has a junction-to-air thermal resistance (RJA) of 263 °C/W. At 300 mA and 1.2 V output (0.36 W dissipation), this yields ~95 °C temperature rise above ambient - well within the −40 to +85 °C operating range when mounted on standard FR-4 with minimal copper. No heatsink is required for typical use cases.
NCP4589DSQ12T1G 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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.7V @ 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)
NCP4589DSQ12T1G FAQ
1.How can I place an order for NCP4589DSQ12T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4589DSQ12T1G 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 NCP4589DSQ12T1G reliable?
The price and inventory of NCP4589DSQ12T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4589DSQ12T1G is usually 5 days.
3.What payment methods are accepted for NCP4589DSQ12T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4589DSQ12T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4589DSQ12T1G?
NCP4589DSQ12T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4589DSQ12T1G 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 NCP4589DSQ12T1G?
For technical support, including NCP4589DSQ12T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4589DSQ12T1G requirements.
6.How does Aetrix verify that NCP4589DSQ12T1G is sourced from the original manufacturer or authorized distributors?
All NCP4589DSQ12T1G 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 NCP4589DSQ12T1G meets industry standards.
7.What is the process for return or replacement of NCP4589DSQ12T1G?
All NCP4589DSQ12T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP4589DSQ12T1G, 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 NCP4589DSQ12T1G part is unused and in its original packaging.
Return procedure for NCP4589DSQ12T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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