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onsemi NCP705EMT33TCG
- Part No.:
- NCP705EMT33TCG
- Manufacturer:
- onsemi
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
NCP705EMT33TCG.pdf
- Description:
- IC REG LINEAR 3.3V 500MA 6WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,830
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Product details
Overview
NCP705EMT33TCG from onsemi is a 500 mA ultra-low-noise, ultra-low-quiescent-current LDO regulator with fixed 3.3 V output, 230 mV typical dropout at full load, ±2% output accuracy over load/line/temperature, and 12 µVRMS noise (100 Hz–100 kHz). It operates from 2.5 V to 5.5 V input and delivers stable power to RF power amplifiers in satellite radios and infotainment systems.
For engineers reviewing the NCP705EMT33TCG datasheet, pinout, applications, or equivalent options, this page provides verified electrical specifications, WDFN6 package layout, thermal performance data, EN-controlled enable/disable behavior, and validated alternatives for battery-powered precision analog and noise-sensitive RF subsystems.
Technical Context
The NCP705EMT33TCG integrates an adaptive low-power mode MOSFET driver with dynamic IQ management, delivering 13 µA typical quiescent current at no load while maintaining fast transient response. Its bandgap reference (0.8 V) feeds a precision error amplifier that regulates output voltage with ±2% tolerance across −40°C to +125°C.
Internal protections include thermal shutdown (160°C trip), current limiting (750 mA typ), undervoltage lockout (1.6 V enable threshold), and active output discharge. The device achieves 71 dB PSRR at 1 kHz without external noise-bypass capacitors and remains stable with only a 1 µF ceramic output capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V - eliminates external resistor divider, reduces BOM count and layout sensitivity. |
| Max Output Current | 500 mA - supports moderate-power RF PA stages and digital baseband ICs without thermal derating on 2×2 mm WDFN6. |
| Dropout Voltage | 230 mV typ @ 500 mA - enables operation from 3.53 V input, critical for Li-ion single-cell (3.0–4.2 V) systems. |
| Quiescent Current | 13 µA typ @ no load - extends battery life in always-on sensor nodes and GPS receivers. |
| Output Noise | 12 µVRMS (100 Hz–100 kHz) - meets stringent spectral purity requirements for RF front-end biasing. |
| PSRR | 71 dB @ 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO. |
| Accuracy | ±2% over load/line/temperature - ensures reliable logic-level compliance for 3.3 V I/O interfaces. |
Pinout & Package
Package: WDFN6 2×2 mm, 0.65 mm pitch, exposed thermal pad (Case 511BR). Exposed pad must be soldered to PCB ground plane for thermal dissipation (θJA = 116.5°C/W, θJB = 30°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output | Delivers 3.3 V to load; requires ≥1 µF X7R/X5R ceramic capacitor to GND for stability. |
| 2 - N/C | No connect | Internally unconnected; may be tied to GND to improve thermal conduction via PCB copper. |
| 3 - GND | Power ground | Main return path; exposed thermal pad must be electrically and thermally connected to GND plane. |
| 4 - EN | Enable control | Logic-high (>0.9 V) enables regulation; <0.4 V disables output and activates active discharge. |
| 5 - N/C | No connect | Internally unconnected; no electrical function; tie to GND if used for thermal enhancement. |
| 6 - IN | Input supply | Accepts 2.5–5.5 V; requires ≥1 µF ceramic capacitor to GND near pin for EMI filtering. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise without bypass cap | 12 µVRMS noise achieved with internal architecture - eliminates need for external 10 nF noise-reduction capacitor, saving board space and cost. |
| Active output discharge | Fast turn-off via integrated discharge transistor - prevents floating output during shutdown, critical for multi-rail sequencing in portable devices. |
| Internal soft-start | 150 µs typical turn-on time - limits inrush current into output capacitance, avoiding input rail droop in battery-fed systems. |
| Stable with 1 µF ceramic COUT | Guaranteed stability down to 1 µF X7R/X5R - supports compact 0402/0603 MLCCs, enabling miniaturized designs. |
| Adaptive IQ management | 13 µA quiescent current at zero load rising to 260 µA at 500 mA - balances standby efficiency and dynamic performance automatically. |
Applications
| Satellite Radio Power Amplifier | Automotive Infotainment SoC Core Supply |
|---|---|
Use Scenario: Biasing GaAs or SiGe RF power amplifiers in satellite radio modules where spectral purity directly impacts adjacent-channel interference. IC Role / Device Role / Timing Role: Ultra-clean 3.3 V bias supply for PA collector/drain, rejecting switching noise from PMIC DC-DC converters. Use Value: 12 µVRMS noise and 71 dB PSRR at 1 kHz prevent AM-to-PM distortion and maintain EVM <2.5% under dynamic modulation. | Use Scenario: Providing regulated core voltage to application processors or DSPs in automotive head units operating from 12 V battery via intermediate buck converter. IC Role / Device Role / Timing Role: Post-regulator for noise-sensitive digital cores requiring tight voltage tolerance and fast load transient recovery. Use Value: ±2% accuracy and 120 mV load transient deviation (1 mA ↔ 500 mA in 1 µs) ensure reliable CPU operation across temperature and aging. |
| Portable Medical Sensor Node | Bluetooth LE Audio Transceiver Bias |
Use Scenario: Powering low-noise instrumentation amplifiers and ADCs in wearable ECG/SpO₂ monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Primary analog supply rail decoupling high-frequency switching noise from digital subsystems. Use Value: 13 µA IQ extends 10-year coin-cell life; 230 mV dropout enables >90% energy extraction from CR2032 (2.0–3.0 V range). | Use Scenario: Supplying clean 3.3 V to Bluetooth LE audio codecs and RF transceivers in true wireless stereo earbuds. IC Role / Device Role / Timing Role: Dedicated LDO for RF/analog sections, isolated from noisy digital VDDIO domains. Use Value: Active discharge ensures rapid output collapse during sleep mode transitions, eliminating cross-conduction in multi-LDO architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B332MR-G | 300 mA max output, 150 mV dropout @ 300 mA, 25 µVRMS noise, no active discharge | Limited to lower-current RF sensors; lacks fast turn-off capability required for multi-rail sequencing | Select when 300 mA suffices and active discharge is unnecessary; smaller footprint but higher noise. |
| Micrel MIC5205-3.3YM5 | 150 mA max output, 170 mV dropout @ 150 mA, 30 µVRMS noise, no EN pin | Not suitable for 500 mA PA bias; fixed enable (no logic control); higher noise degrades RF linearity | Use only in legacy 150 mA designs; avoid for new RF or battery-life-critical applications. |
Compared with XC6210B332MR-G and MIC5205-3.3YM5, the NCP705EMT33TCG uniquely combines 500 mA drive, 12 µVRMS noise, active discharge, and EN control in a 2×2 mm WDFN6 package-enabling single-chip solutions for next-generation portable RF systems where size, noise, and sequencing integrity are co-constrained.
Availability
NCP705EMT33TCG is available at Aetrix Electronics and suitable for satellite radio modules, automotive infotainment systems, and portable medical equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for NCP705EMT33TCG 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 (Nasdaq: ON) is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP705 series is designed specifically for ultra-low-noise, ultra-low-IQ power delivery in battery-operated RF and precision analog systems-addressing the growing demand for clean, efficient, and compact voltage regulation in portable electronics.
FAQ
What is the maximum input voltage rating for the NCP705EMT33TCG?
The NCP705EMT33TCG has an absolute maximum input voltage of 6 V, with recommended operating range from 2.5 V to 5.5 V. Exceeding 6 V risks permanent damage per Table 2 in the datasheet. For reliable 3.3 V output, minimum input must exceed 3.53 V (3.3 V + 230 mV dropout) under 500 mA load.
Does the NCP705EMT33TCG require an external noise-bypass capacitor?
No, the NCP705EMT33TCG achieves 12 µVRMS output noise (100 Hz–100 kHz) without any external noise-bypass capacitor. This is enabled by its internal low-noise architecture and precision bandgap reference, reducing bill-of-materials cost and PCB area versus traditional LDOs requiring 10 nF bypass caps.
How does the EN pin function on the NCP705EMT33TCG?
The EN pin on the NCP705EMT33TCG provides logic-level control: voltage >0.9 V enables regulation and disables active discharge; voltage <0.4 V disables output and activates active discharge. Internal 110 nA pull-down ensures default OFF state when unconnected, and 2 mV hysteresis prevents noise-induced oscillation.
What thermal performance can be expected from the NCP705EMT33TCG in a standard PCB layout?
With the exposed thermal pad soldered to a 645 mm² 1 oz copper plane, the NCP705EMT33TCG achieves θJB = 30°C/W and θJA = 116.5°C/W. At 500 mA load and 3.5 V input, power dissipation is ~100 mW, resulting in ~3°C junction-to-board rise-well within safe margin below the 150°C max junction temperature.
Is the NCP705EMT33TCG stable with ceramic output capacitors smaller than 10 µF?
Yes-the NCP705EMT33TCG is explicitly characterized and guaranteed stable with ≥1 µF X5R/X7R ceramic output capacitors, including compact 0402 and 0603 packages. Stability is maintained across temperature, DC bias, and aging, unlike many LDOs requiring 10–22 µF minimum for phase margin assurance.
NCP705EMT33TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.35V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 25 µA
- Current - Supply (Max):
- 260 µA
- PSRR:
- 73dB ~ 56dB (100Hz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Soft Start, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WDFN (2x2)
NCP705EMT33TCG FAQ
1.How can I place an order for NCP705EMT33TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP705EMT33TCG 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 NCP705EMT33TCG reliable?
The price and inventory of NCP705EMT33TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP705EMT33TCG is usually 5 days.
3.What payment methods are accepted for NCP705EMT33TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP705EMT33TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP705EMT33TCG?
NCP705EMT33TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP705EMT33TCG 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 NCP705EMT33TCG?
For technical support, including NCP705EMT33TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP705EMT33TCG requirements.
6.How does Aetrix verify that NCP705EMT33TCG is sourced from the original manufacturer or authorized distributors?
All NCP705EMT33TCG 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 NCP705EMT33TCG meets industry standards.
7.What is the process for return or replacement of NCP705EMT33TCG?
All NCP705EMT33TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP705EMT33TCG, 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 NCP705EMT33TCG part is unused and in its original packaging.
Return procedure for NCP705EMT33TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCP705EMT33TCG Tags
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