My Inquiry
My Account
onsemi NCP703SN30T1G
- Part No.:
- NCP703SN30T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP703SN30T1G.pdf
- Description:
- IC REG LINEAR 3V 300MA 6TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,896
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NCP703SN30T1G from onsemi is a 300 mA ultra-low-noise, ultra-low-quiescent-current LDO voltage regulator delivering fixed 3.0 V output with ±2% accuracy, 180 mV typical dropout at full load, 13 µVRMS output noise (100 Hz–100 kHz), and 68 dB PSRR at 1 kHz-designed for powering RF power amplifiers in satellite radios and infotainment systems.
For engineers reviewing the NCP703SN30T1G datasheet, pinout, applications, or equivalent options, key selection criteria include quiescent current (12 µA typ.), dropout voltage (180 mV @ 300 mA), noise performance without external bypass capacitor, EN pin logic thresholds (0.4 V low / 0.9 V high), and stability with 1 µF ceramic output capacitor.
Technical Context
The NCP703SN30T1G employs a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-current protection, combined with adaptive ground current management to maintain 12 µA quiescent current at no-load while supporting fast load transients up to 300 mA. Its internal soft-start limits inrush current during enable assertion.
It integrates thermal shutdown (160°C trip, 20°C hysteresis), output current limiting (490 mA typ.), undervoltage lockout (1.6 V enable threshold), and active output discharge via a 320 Ω internal pull-down-enabling clean, controlled turn-off in battery-powered portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±2% over load/line/temperature - ensures stable bias for RF PA stages without external feedback tuning. |
| Max Output Current | 300 mA continuous - sufficient to supply multi-stage RF front-ends or precision analog sensor chains. |
| Quiescent Current | 12 µA typical at no load - extends battery life in always-on IoT sensors and wearable devices. |
| Output Noise | 13 µVRMS (100 Hz–100 kHz) - eliminates need for external noise-bypass capacitor, reducing BOM count and PCB area. |
| PSRR | 68 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding sensitive RF circuitry. |
| Dropout Voltage | 180 mV typical at 300 mA - enables operation from single-cell Li-ion (3.0 V min) down to 2.0 V input. |
| EN Threshold | 0.4 V (low) / 0.9 V (high) - compatible with standard GPIOs and supports direct tie-to-IN when enable not required. |
Pinout & Package
Package: TSOP−5 (Case 483), 3.00 × 1.50 × 0.95 mm, Pb-free, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input voltage supply | Accepts 2.0–5.5 V; requires ≥1 µF ceramic capacitor close to pin for stability and noise filtering. |
| 2 - EN | Enable control input | Logic-high (>0.9 V) enables regulation; logic-low (<0.4 V) disables output and activates 320 Ω active discharge. |
| 3 - N/C | No connect | Internally unconnected; may be left floating or tied to GND for improved thermal dissipation. |
| 4 - GND | Power ground reference | Die ground connected to lead frame; soldering to large copper plane improves thermal resistance (JL = 129 °C/W). |
| 5 - OUT | Regulated output | Delivers 3.0 V ±2%; requires ≥1 µF X5R/X7R ceramic capacitor placed adjacent to pin for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise without CNR | 13 µVRMS output noise achieved with only 1 µF COUT, eliminating dedicated noise-bypass capacitor and associated layout complexity. |
| Dynamic IQ management | 12 µA quiescent current at zero load, rising only modestly under load - optimizes standby power in intermittently active wireless modules. |
| Active output discharge | Internal 320 Ω pull-down discharges VOUT rapidly upon disable - prevents floating outputs and ensures deterministic system reset timing. |
| Stable with minimal capacitance | Guaranteed stability with 0.1 µF effective COUT - accommodates DC-bias derating of small-case ceramics (e.g., 0402 1 µF). |
| Integrated protections | Thermal shutdown (160°C), current limit (490 mA typ.), UVLO (1.6 V), and short-circuit robustness - enables reliable operation without external fault-handling circuitry. |
Applications
| Satellite Radio Power Amplifier Supply | Infotainment System Audio Codec Bias |
|---|---|
Use Scenario: Powers RF power amplifier stage in satellite radio receivers where supply ripple directly modulates carrier signal. IC Role / Device Role / Timing Role: Ultra-low-noise LDO providing clean 3.0 V bias to GaAs FET amplifier, rejecting noise from shared PMIC rails. Use Value: 13 µVRMS noise and 68 dB PSRR at 1 kHz prevent AM-sideband distortion and EVM degradation in QPSK/QAM signals. | Use Scenario: Supplies reference voltage and analog core for high-fidelity audio codecs in automotive head units. IC Role / Device Role / Timing Role: Precision 3.0 V LDO with ±2% accuracy and low load regulation (6 mV/300 mA) stabilizing DAC/ADC reference paths. Use Value: Maintains THD+N < −105 dB by eliminating supply-induced ground bounce and ripple coupling into analog signal chains. |
| Portable Medical Sensor Node | Bluetooth LE Wearable MCU Core Supply |
Use Scenario: Powers low-power biosignal acquisition ICs (ECG, PPG) in disposable patch monitors with multi-day battery life. IC Role / Device Role / Timing Role: Battery-efficient LDO delivering regulated 3.0 V from declining Li-ion cell (3.6 V → 2.8 V), with dynamic IQ scaling. Use Value: 12 µA quiescent current extends shelf life and operational runtime; 180 mV dropout enables usable voltage range down to 2.0 V input. | Use Scenario: Supplies 3.0 V core rail to Bluetooth Low Energy SoC during periodic advertising and connection events. IC Role / Device Role / Timing Role: Fast-transient LDO with 200 µs turn-on time and active discharge, synchronized to BLE sleep/wake cycles. Use Value: Enables rapid wake-from-sleep (sub-millisecond VOUT ramp) and clean power-down, reducing system-level energy per packet by >15%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3002E/MB | 250 mA max output, 1.6 µA IQ, 170 mV dropout @ 250 mA, no active discharge | Lacks active output discharge and higher PSRR (60 dB @ 1 kHz); suited for simpler, lower-current sensor nodes | Select when ultra-low IQ dominates over RF noise performance and fast turn-off is unnecessary. |
| Torex XC6210B302MR-G | 300 mA, 15 µA IQ, 200 mV dropout @ 300 mA, 25 µVRMS noise, no EN pin | Higher noise, no enable control, fixed 3.0 V output - suitable for cost-sensitive, always-on embedded peripherals | Choose when board space is constrained and EN functionality is omitted from system architecture. |
Compared with MCP1700T-3002E/MB and XC6210B302MR-G, the NCP703SN30T1G uniquely combines RF-grade noise performance (13 µVRMS), active discharge, and 300 mA capability in TSOP-5 - making it optimal for noise-sensitive, battery-powered RF and precision analog subsystems requiring deterministic power sequencing.
Availability
NCP703SN30T1G is available at Aetrix Electronics and suitable for satellite radio front-ends, automotive infotainment audio subsystems, and portable medical biosensor nodes requiring stable component supply with guaranteed long-term manufacturability.
Supply support for NCP703SN30T1G 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 electronics for automotive, industrial, cloud, and IoT applications.
The NCP703 series is part of onsemi's precision analog portfolio, engineered specifically for ultra-low-noise, ultra-low-IQ power delivery in battery-constrained RF and portable instrumentation systems.
FAQ
What is the maximum input voltage rating for the NCP703SN30T1G?
The NCP703SN30T1G has an absolute maximum input voltage rating of 6 V. Operation is specified across 2.0 V to 5.5 V, with undervoltage lockout engaging below ~1.6 V. Exceeding 6 V risks permanent damage per Absolute Maximum Ratings table in the datasheet.
Does the NCP703SN30T1G require an external noise-bypass capacitor?
No, the NCP703SN30T1G achieves 13 µVRMS output noise (100 Hz–100 kHz) without any external noise-bypass capacitor. Its internal design eliminates the need for a separate CNR, simplifying layout and reducing BOM count while maintaining RF-grade cleanliness.
What is the thermal shutdown behavior of the NCP703SN30T1G?
The NCP703SN30T1G triggers thermal shutdown at ~160°C junction temperature and resets at ~140°C (20°C hysteresis). During shutdown, the pass transistor turns off and output is disabled. The device resumes regulation automatically once die temperature falls below the reset threshold.
Can the NCP703SN30T1G operate with a 0402-size 1 µF ceramic output capacitor?
Yes - the NCP703SN30T1G is designed to remain stable with ≥0.1 µF effective output capacitance. A 0402 1 µF X7R capacitor typically retains >0.3 µF at 3.0 V DC bias, satisfying the minimum requirement and enabling ultra-compact layouts.
What is the purpose of the N/C pin (Pin 3) in the TSOP-5 package of the NCP703SN30T1G?
Pin 3 in the TSOP-5 package is Not Connected (N/C) internally. It may be left floating or tied to GND to improve thermal dissipation via additional copper connection - leveraging the exposed pad structure without affecting electrical function.
NCP703SN30T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 20 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- 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:
- 5-TSOP
NCP703SN30T1G FAQ
1.How can I place an order for NCP703SN30T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP703SN30T1G 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 NCP703SN30T1G reliable?
The price and inventory of NCP703SN30T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP703SN30T1G is usually 5 days.
3.What payment methods are accepted for NCP703SN30T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP703SN30T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP703SN30T1G?
NCP703SN30T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP703SN30T1G 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 NCP703SN30T1G?
For technical support, including NCP703SN30T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP703SN30T1G requirements.
6.How does Aetrix verify that NCP703SN30T1G is sourced from the original manufacturer or authorized distributors?
All NCP703SN30T1G 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 NCP703SN30T1G meets industry standards.
7.What is the process for return or replacement of NCP703SN30T1G?
All NCP703SN30T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP703SN30T1G, 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 NCP703SN30T1G part is unused and in its original packaging.
Return procedure for NCP703SN30T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCP703SN30T1G Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
