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onsemi NCP582LSQ18T1G
- Part No.:
- NCP582LSQ18T1G
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCP582LSQ18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 150MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,690
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Product details
Overview
NCP582LSQ18T1G from onsemi is an ultra-fast, low-noise 150 mA CMOS LDO regulator with active-low enable, designed for portable battery-powered systems requiring precise 1.8 V output, 220 mV dropout at full load, and 30 µVRMS output noise. It operates from 2.0–6.0 V input and delivers ±2% output voltage accuracy across −40°C to +85°C ambient.
For engineers reviewing the NCP582LSQ18T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its SC−82AB package footprint, active-low CE functionality with auto-discharge capability, low 75 µA quiescent current, and high PSRR (70 dB @ 1 kHz) for noise-sensitive analog and RF subsystems.
Technical Context
The NCP582LSQ18T1G implements a CMOS-based LDO architecture with internal bandgap reference, error amplifier, and pass transistor-optimized for fast transient response and minimal output voltage drift (100 ppm/°C). Its active-low enable pin directly controls internal biasing and engages an N-channel discharge path when disabled.
It supports ceramic output capacitors as low as 0.47 µF (for VOUT ≥ 2.5 V) or 1.0 µF (for VOUT < 2.5 V), enabling compact, stable regulation without ESR-dependent compensation. Input voltage range (2.0–6.0 V) and 150 mA continuous output make it suitable for single-cell Li-ion, multi-cell alkaline, or USB-powered rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±2% - tightly regulated rail for core logic, memory I/O, or low-voltage microcontrollers. |
| Dropout Voltage | 220 mV @ 150 mA - enables operation down to ~2.02 V input, supporting deep battery discharge in portable devices. |
| Quiescent Current | 75 µA typ - minimizes standby power loss in always-on subsystems like real-time clocks or sensor interfaces. |
| Output Noise | 30 µVRMS (10 Hz–100 kHz) - eliminates need for external noise-reduction capacitors in audio, ADC, or RF supply paths. |
| PSRR | 70 dB @ 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Enable Threshold | VTH,LOW ≤ 0.3 V, VTH,HIGH ≥ 1.5 V - compatible with standard GPIO logic levels for clean digital control. |
| Operating Temp | −40°C to +85°C - qualified for industrial and extended-temperature consumer applications. |
Pinout & Package
Package: SC−82AB (Case 419C), 4-pin surface-mount, Pb-free, 1.8 × 1.2 mm footprint with 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Main input supply connection; requires 1.0 µF ceramic decoupling capacitor to GND per layout guidelines. |
| 2 | GND | Power ground return; second GND pin (Pin 5 in SOT−563 variant) not present-SC−82AB uses single GND terminal. |
| 3 | Vout | Regulated 1.8 V output; place 0.47 µF ceramic capacitor within 2 mm of this pin for stability. |
| 4 | CE | Active-low chip enable; pulled low to activate regulator; internally pulled up when floating (per datasheet functional description). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 220 mV @ 150 mA enables >90% efficiency at light-to-moderate loads with minimal thermal rise in SC−82AB package. |
| Low-noise regulation | 30 µVRMS output noise eliminates need for external RC filters in precision analog signal chains. |
| Fast dynamic response | Sub-µs load transient recovery (Fig. 21–22) maintains <±25 mV deviation during 0→150 mA steps-critical for burst-mode processors. |
| Auto-discharge function | Internal N-channel path discharges Vout to GND within microseconds after CE deactivation-prevents back-powering downstream circuits. |
| Foldback current limit | Reduces short-circuit current to ~40 mA (typ), limiting power dissipation and enabling safe fault recovery without external protection. |
Applications
| Smartphone Baseband Core Supply | Digital Camera Image Sensor Bias |
|---|---|
Use Scenario: Powering ARM Cortex-A series application processor cores requiring stable 1.8 V at up to 120 mA during video encode bursts. IC Role / Device Role / Timing Role: Primary LDO delivering low-noise, fast-response 1.8 V rail; CE synchronized to processor sleep/wake signals. Use Value: 220 mV dropout extends usable battery life by 12+ minutes per charge cycle vs. higher-dropout alternatives; 30 µVRMS noise prevents image sensor pattern noise. | Use Scenario: Biasing CMOS image sensor analog front-end (AFE) and column ADC drivers in compact camcorders. IC Role / Device Role / Timing Role: Low-noise post-regulator for noise-sensitive analog pixel readout circuitry; enabled only during active frame capture. Use Value: 70 dB PSRR at 1 kHz rejects switching ripple from main PMIC; 100 ppm/°C tempco ensures consistent color balance across operating temperature range. |
| Wearable Heart Rate Monitor MCU Supply | Bluetooth LE Audio Earbud Codec Supply |
Use Scenario: Supplying ultra-low-power MCU and optical PPG sensor ASIC in wrist-worn health trackers. IC Role / Device Role / Timing Role: Always-on LDO providing 1.8 V to sensor interface and wake-up logic; CE controlled by motion-detection interrupt. Use Value: 75 µA quiescent current reduces average system standby power by >30%; auto-discharge prevents leakage into disabled sensor blocks. | Use Scenario: Powering Bluetooth audio codec ICs requiring clean 1.8 V for DAC and headphone driver stages in true wireless stereo earbuds. IC Role / Device Role / Timing Role: Secondary LDO filtering noise from shared battery rail; CE toggled with audio playback state. Use Value: 30 µVRMS noise floor avoids audible hiss in 24-bit audio path; SC−82AB footprint fits tight PCB space constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 250 mV dropout @ 250 mA; 1.8 V fixed output; SOT-23-5 package; no auto-discharge. | Lacks active discharge path-requires external MOSFET or resistor for Vout bleed-down in power-gated systems. | Select if board space allows SOT-23-5 and auto-discharge is unnecessary; verify PSRR (60 dB @ 1 kHz) meets noise requirements. |
| TCS2117-180MV | 180 mV dropout @ 150 mA; 1.8 V fixed; SC-70-5 package; 65 µA Iq; no CE pin. | Fixed-enable operation only-no digital control; smaller SC-70 footprint but lower thermal mass limits sustained 150 mA use. | Choose for cost-sensitive, non-gated applications where CE control is omitted; confirm thermal derating at 85°C ambient. |
Compared with MCP1700T-1802E/TT and TCS2117-180MV, the NCP582LSQ18T1G uniquely combines active-low CE with integrated auto-discharge, ultra-low noise, and SC−82AB's balanced thermal performance-making it optimal for battery-constrained, digitally controlled, noise-sensitive portable systems.
Availability
NCP582LSQ18T1G is available at Aetrix Electronics and suitable for portable equipment, handheld instrumentation, and camcorder/camera power management requiring stable component supply, long-lifecycle support, and Pb-free compliance.
Supply support for NCP582LSQ18T1G 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 innovation for automotive, industrial, cloud, and IoT applications.
The NCP582 series belongs to onsemi's precision analog LDO portfolio, engineered specifically for portable battery-powered devices demanding ultra-low noise, fast transient response, and minimal quiescent power consumption.
FAQ
What is the maximum input voltage rating for the NCP582LSQ18T1G?
The NCP582LSQ18T1G has an absolute maximum input voltage (Vin) rating of 6.5 V. However, the recommended operating input voltage range is 2.0 V to 6.0 V, as specified in the Electrical Characteristics table. Exceeding 6.5 V risks permanent damage per the Absolute Maximum Ratings section. For reliable 1.8 V output regulation, Vin must remain ≥ Vout + dropout (≥ 2.02 V typical at 150 mA load).
Does the NCP582LSQ18T1G require an external noise-reduction capacitor?
No, the NCP582LSQ18T1G does not require an external noise-reduction capacitor. Its inherent design achieves 30 µVRMS output noise (10 Hz–100 kHz) without additional capacitance. The datasheet explicitly states "Low Output Noise of 30 µVRMS without Noise Reduction Cap" in the Features list, and Figure 19 confirms ripple rejection performance with only standard input/output ceramics.
What is the function of Pin 4 (CE) on the NCP582LSQ18T1G in SC−82AB package?
Pin 4 is the active-low Chip Enable (CE) input. When CE is pulled low (≤ 0.3 V), the NCP582LSQ18T1G enables regulation and powers the Vout pin. When CE is high (≥ 1.5 V), the device enters shutdown mode with <1.0 µA quiescent current and activates its internal N-channel auto-discharge path to rapidly pull Vout to GND. This behavior is confirmed in the PIN FUNCTION DESCRIPTION table and Figure 2 block diagram.
Can the NCP582LSQ18T1G be used with a 0.47 µF output capacitor?
Yes-the NCP582LSQ18T1G is fully stable with a 0.47 µF ceramic output capacitor. The datasheet specifies "Vout ≥ 2.5 V → Cout = 0.47 µF" and "Vout < 2.5 V → Cout = 1.0 µF", and the NCP582LSQ18T1G's 1.8 V output falls in the latter category. However, Figure 17–19 test data and Application Information confirm stable operation with 0.47 µF at 2.8 V; for 1.8 V, 1.0 µF is recommended-but 0.47 µF remains functional per layout best practices.
What thermal limitations apply to the NCP582LSQ18T1G in SC−82AB package at 150 mA load?
In SC−82AB package, the NCP582LSQ18T1G has a maximum power dissipation (PD) of 150 mW. At 150 mA load with 220 mV dropout, power dissipation is 33 mW (0.15 A × 0.22 V), well below the 150 mW limit. Junction temperature rise is ~22°C above ambient (using θJA ≈ 150°C/W), keeping TJ ≤ 107°C at 85°C ambient-within the 125°C max rating. No heatsinking is required under these conditions.
NCP582LSQ18T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 95 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB ~ 60dB (1kHz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-82AB
NCP582LSQ18T1G FAQ
1.How can I place an order for NCP582LSQ18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP582LSQ18T1G 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 NCP582LSQ18T1G reliable?
The price and inventory of NCP582LSQ18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP582LSQ18T1G is usually 5 days.
3.What payment methods are accepted for NCP582LSQ18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP582LSQ18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP582LSQ18T1G?
NCP582LSQ18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP582LSQ18T1G 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 NCP582LSQ18T1G?
For technical support, including NCP582LSQ18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP582LSQ18T1G requirements.
6.How does Aetrix verify that NCP582LSQ18T1G is sourced from the original manufacturer or authorized distributors?
All NCP582LSQ18T1G 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 NCP582LSQ18T1G meets industry standards.
7.What is the process for return or replacement of NCP582LSQ18T1G?
All NCP582LSQ18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP582LSQ18T1G, 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 NCP582LSQ18T1G part is unused and in its original packaging.
Return procedure for NCP582LSQ18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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