My Inquiry
My Account
onsemi NCP703SN28T1G
- Part No.:
- NCP703SN28T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP703SN28T1G.pdf
- Description:
- IC REG LINEAR 2.8V 300MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,868
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NCP703SN28T1G from onsemi is a 300 mA ultra-low-noise, ultra-low-quiescent-current LDO voltage regulator delivering 2.8 V output with ±2% accuracy, 180 mV typical dropout at full load, 13 µVRMS 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 NCP703SN28T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its fixed 2.8 V output, TSOP-5 package compatibility, 12 µA quiescent current at no load, active output discharge, and stability with only a 1 µF ceramic output capacitor.
Technical Context
The NCP703SN28T1G employs a PMOS pass transistor architecture enabling low dropout and reverse-current protection via an inherent body diode. Its adaptive ground current management dynamically reduces IQ to 12 µA under light-load conditions while maintaining fast transient response.
Internal circuitry includes undervoltage lockout (UVLO) with 1.6 V turn-on threshold and 100 mV hysteresis, thermal shutdown at 160°C with 20°C hysteresis, and integrated soft-start limiting inrush current. The EN pin provides logic-level control with 0.9 V high-threshold and 0.4 V low-threshold, plus built-in 110 nA pull-down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2% over load/line/temperature - ensures stable biasing for RF PA stages without external feedback. |
| Max Output Current | 300 mA continuous - sufficient to drive multi-stage RF front-ends or precision analog sensor chains. |
| Quiescent Current | 12 µA typ. at IOUT = 0 mA - extends battery life in always-on portable medical or GPS devices. |
| Output Noise | 13 µVRMS (100 Hz–100 kHz) - eliminates need for external noise-bypass capacitors in sensitive RF supply rails. |
| PSRR | 68 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters feeding mixed-signal SoCs. |
| Dropout Voltage | 180 mV typ. at 300 mA - enables operation from single-cell Li-ion (3.0 V min) down to 2.98 V under full load. |
| Enable Threshold | VEN_HI = 0.9 V, VEN_LO = 0.4 V - compatible with 1.8 V and 3.3 V GPIOs without level-shifting. |
Pinout & Package
Package: TSOP-5 (Case 483), 3.00 × 1.50 × 0.95 mm, Pb-free, moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input voltage supply | Accepts 2.0–5.5 V input; requires ≥1 µF ceramic capacitor to GND 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 path to GND. |
| 3 - N/C | No-connect terminal | Internally unconnected; must be left floating or grounded only for thermal improvement (not electrically required). |
| 4 - GND | Power ground reference | Die ground tied to lead frame; soldered to PCB copper pour for optimal thermal dissipation (JL = 129°C/W). |
| 5 - OUT | Regulated output | Delivers 2.8 V ±2%; requires ≥1 µF X5R/X7R ceramic capacitor placed adjacent to pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise without bypass cap | 13 µVRMS noise achieved internally - removes BOM cost and board space for external CNR, simplifying layout for RF sections. |
| Active output discharge | 320 Ω internal discharge path pulls VOUT to GND in <1 ms after disable - prevents back-powering of downstream circuitry during power sequencing. |
| Dynamic IQ management | IQ drops to 12 µA at zero load and scales with output current - balances battery runtime and transient performance in portable designs. |
| Stable with 1 µF ceramic COUT | Guaranteed stability down to 0.1 µF effective capacitance - supports compact 0402 MLCCs even under DC bias derating. |
| Integrated soft-start | Monotonic VOUT ramp with ~200 µs turn-on time - prevents inrush-induced bus droop in multi-rail systems sharing input sources. |
Applications
| Satellite Radio Power Amplifier Supply | Infotainment System Audio Codec Bias |
|---|---|
Use Scenario: Powers Class AB RF power amplifier in L-band satellite radio receivers where supply ripple directly modulates carrier phase. IC Role / Device Role / Timing Role: Ultra-low-noise LDO providing clean 2.8 V bias to PA collector/drain, rejecting noise from shared system DC-DC converter. Use Value: 13 µVRMS noise and 68 dB PSRR at 1 kHz prevent EVM degradation and meet ETSI EN 300 422 spectral mask requirements. | Use Scenario: Supplies reference voltage and analog core for stereo audio codec in automotive head units with strict THD+N limits. IC Role / Device Role / Timing Role: Low-drift, low-noise 2.8 V regulator for DAC/ADC analog sections and PLL charge pump, co-located near codec die. Use Value: ±2% output accuracy and 180 mV dropout enable stable operation across cold-crank (6.5 V) to battery-depleted (9 V) conditions without brownout. |
| Portable Medical Pulse Oximeter Sensor Front-End | Bluetooth LE Wearable System-on-Chip Core Rail |
Use Scenario: Powers photodiode transimpedance amplifier and LED driver in battery-operated pulse oximeters requiring sub-µV noise floor. IC Role / Device Role / Timing Role: Precision analog LDO delivering regulated 2.8 V to op-amp signal chain, isolated from digital switching noise. Use Value: 12 µA quiescent current extends single-CR2032 battery life beyond 72 hours of continuous SpO₂ monitoring. | Use Scenario: Provides core voltage to Bluetooth 5.0 SoC (e.g., nRF52840) in fitness trackers where sleep-mode current dominates lifetime. IC Role / Device Role / Timing Role: Always-on LDO supplying 2.8 V to SoC's 32 kHz RTC and BLE radio wake-up circuitry during deep-sleep states. Use Value: Active discharge ensures rapid VOUT decay during host-initiated reset, preventing latch-up in SoC's power management unit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B282MR-G | 280 mA max output, 25 µA IQ, 25 µVRMS noise, SOT-25 package | Lacks active discharge and EN pin hysteresis; lower PSRR (55 dB @ 1 kHz) | Choose when lowest BOM cost is critical and active discharge is not required. |
| Micrel MIC5205-2.8YM5-TR | 150 mA max output, 80 µA IQ, 30 µVRMS noise, SOT-23-5 package | Higher dropout (350 mV @ 150 mA), no UVLO or thermal hysteresis | Choose for legacy designs using SOT-23 footprints where 300 mA is not needed. |
Compared with XC6210B282MR-G and MIC5205-2.8YM5-TR, the NCP703SN28T1G delivers higher output current, lower quiescent current, lower noise, and integrated protections-making it superior for next-generation RF and portable medical applications demanding both efficiency and signal integrity.
Availability
NCP703SN28T1G is available at Aetrix Electronics and suitable for satellite radio modules, automotive infotainment systems, and portable medical instrumentation requiring stable component supply with guaranteed long-term availability.
Supply support for NCP703SN28T1G 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 NCP703SN28T1G belongs to onsemi's high-performance LDO family engineered specifically for noise-sensitive RF and precision analog subsystems in battery-powered portable electronics.
FAQ
What is the output voltage tolerance of the NCP703SN28T1G over temperature and load?
The NCP703SN28T1G maintains ±2% output voltage accuracy across −40°C to +125°C junction temperature, full 0–300 mA load range, and input voltage from VOUT + 0.5 V to 5.5 V. This is verified per Table 4 in the datasheet and ensures reliable biasing for RF PAs and precision ADCs without external trimming.
Does the NCP703SN28T1G require an external noise-bypass capacitor?
No, the NCP703SN28T1G achieves 13 µVRMS output noise (100 Hz–100 kHz) without any external noise-reduction capacitor. Its internal design eliminates the need for a CNR pin or additional 10 nF–100 nF ceramic capacitor, reducing BOM count and PCB area in space-constrained RF layouts.
What is the maximum input voltage rating for the NCP703SN28T1G?
The absolute maximum input voltage for the NCP703SN28T1G is 6 V, but the recommended operating range is 2.0 V to 5.5 V per Table 4. Exceeding 6 V risks permanent damage; operation above 5.5 V voids parametric guarantees and may trigger internal UVLO or thermal shutdown unpredictably.
How does the EN pin function on the NCP703SN28T1G?
The EN pin on the NCP703SN28T1G enables logic-controlled on/off functionality: driving EN >0.9 V turns on regulation; driving EN <0.4 V disables output and activates the 320 Ω active discharge path. An internal 110 nA pull-down ensures default-off state if left unconnected.
Can the NCP703SN28T1G be used with a 0402-size 1 µF ceramic output capacitor?
Yes, the NCP703SN28T1G is designed to remain stable with minimum effective output capacitance of 0.1 µF, accommodating DC-bias derating of small-case MLCCs like 0402 X7R. Datasheet Figure 49 confirms usable capacitance >0.1 µF at 2.8 V bias, making 0402 1 µF capacitors fully compliant.
NCP703SN28T1G 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):
- 2.8V
- 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
NCP703SN28T1G FAQ
1.How can I place an order for NCP703SN28T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP703SN28T1G 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 NCP703SN28T1G reliable?
The price and inventory of NCP703SN28T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP703SN28T1G is usually 5 days.
3.What payment methods are accepted for NCP703SN28T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP703SN28T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP703SN28T1G?
NCP703SN28T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP703SN28T1G 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 NCP703SN28T1G?
For technical support, including NCP703SN28T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP703SN28T1G requirements.
6.How does Aetrix verify that NCP703SN28T1G is sourced from the original manufacturer or authorized distributors?
All NCP703SN28T1G 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 NCP703SN28T1G meets industry standards.
7.What is the process for return or replacement of NCP703SN28T1G?
All NCP703SN28T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP703SN28T1G, 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 NCP703SN28T1G part is unused and in its original packaging.
Return procedure for NCP703SN28T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCP703SN28T1G 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…
