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onsemi NCP702SN28T1G
- Part No.:
- NCP702SN28T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP702SN28T1G.pdf
- Description:
- IC REG LINEAR 2.8V 200MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,262
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Product details
Overview
NCP702SN28T1G from onsemi is a 200 mA ultra-low-noise, ultra-low-quiescent-current LDO voltage regulator with fixed 2.8 V output, 140 mV typical dropout at full load, ±2% output accuracy over temperature/load/line, and 11 µVRMS integrated noise (100 Hz–100 kHz). It powers noise-sensitive RF circuitry including PLLs, oscillators, and low-noise amplifiers in portable medical devices and wireless handsets.
For engineers reviewing the NCP702SN28T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its adaptive ground current (10 µA typ. IQ), no-bypass-capacitor ultra-low-noise operation, active output discharge, and stable performance with only 1 µF ceramic output capacitor.
Technical Context
The NCP702SN28T1G employs a PMOS pass transistor architecture enabling reverse-current blocking and eliminating external diode requirements. Its internal bandgap reference and adaptive biasing deliver stable regulation across −40 °C to +125 °C while maintaining ultra-low ground current under light loads.
It integrates undervoltage lockout (UVLO) with 1.6 V enable threshold and 100 mV hysteresis, thermal shutdown at 160 °C with 20 °C hysteresis, and current limiting (385 mA typ.)-all without external components. The EN pin controls both regulation and active discharge via a 1 kΩ internal pull-down path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2% over full load/line/temperature range - ensures stable bias for RF front-end ICs without trimming. |
| Max Output Current | 200 mA continuous - supports moderate-power analog subsystems such as GPS receivers or Bluetooth baseband processors. |
| Dropout Voltage | 140 mV typical at 200 mA - enables operation from single-cell Li-ion (3.0 V min.) down to 2.94 V input while sustaining regulation. |
| Quiescent Current | 10 µA typical at zero load - extends battery life in always-on sensor nodes and wearable standby modes. |
| Output Noise | 11 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 adjacent DC-DC converters feeding the same power rail. |
| Enable Threshold | VEN_HI = 0.9 V, VEN_LO = 0.4 V - compatible with 1.8 V and 3.3 V logic families without level-shifting. |
Pinout & Package
Package: TSOP-5 (Case 483), 2.8 mm × 2.9 mm × 1.1 mm, Pb-free, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply connection | Accepts 2.0–5.5 V input; requires local 1 µF ceramic decoupling to minimize trace inductance effects during load transients. |
| 2 (EN) | Logic-enable control input | Drives high (>0.9 V) to enable regulation; drives low (<0.4 V) to disable with active output discharge (1 kΩ path to GND). |
| 3 (GND) | Power ground reference | Primary return path for IN, OUT, and internal bias currents; must be low-impedance connection to minimize ground bounce. |
| 4 (OUT) | Regulated output terminal | Delivers 2.8 V ±2%; stable with ≥1 µF X5R/X7R ceramic capacitor; sensitive to trace resistance between pin and load. |
| 5 (N/C) | No-connect terminal | Internally unconnected; may be tied to GND to improve thermal dissipation but has no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise without bypass cap | 11 µVRMS noise achieved via internal filtering - removes need for dedicated 10 nF–100 nF noise-reduction capacitor. |
| Adaptive ground current | 10 µA IQ at no load, rising to 160 µA at 200 mA - minimizes idle power loss while preserving transient response. |
| Active output discharge | 1 kΩ internal discharge path activated during shutdown - ensures fast, controlled VOUT ramp-down for sequencing-critical systems. |
| Stable with minimal output capacitance | Guaranteed stability with 1 µF ±10% X5R/X7R ceramic - reduces footprint vs. legacy LDOs requiring ≥4.7 µF. |
| Integrated protection | Thermal shutdown (160 °C), current limit (385 mA typ.), UVLO (1.6 V), and ESD robustness (2 kV HBM) - eliminates need for external fault management circuitry. |
Applications
| GNSS Receivers | Wireless Audio Transceivers |
|---|---|
Use Scenario: Powering LNA and VCO stages in compact GPS/GLONASS modules where board space and EMI are constrained. IC Role / Device Role / Timing Role: Ultra-clean 2.8 V bias supply for phase-locked loops and low-noise amplifiers requiring sub-15 µVRMS ripple. Use Value: Enables 2.5 dB improvement in receiver noise figure versus standard LDOs, directly increasing location acquisition speed and sensitivity. | Use Scenario: Supplying Bluetooth 5.0 LE audio SoCs in true-wireless stereo earbuds with aggressive battery runtime targets. IC Role / Device Role / Timing Role: Primary 2.8 V rail for digital baseband and RF transceiver sections during active streaming and deep-sleep states. Use Value: 10 µA quiescent current extends shelf-life and standby time beyond 120 days; active discharge prevents cross-conduction during multi-rail power sequencing. |
| Portable ECG Monitors | IoT Edge Sensor Nodes |
Use Scenario: Providing precision analog supply to 24-bit delta-sigma ADCs and instrumentation amplifiers in handheld clinical-grade biosensors. IC Role / Device Role / Timing Role: Low-drift, low-noise 2.8 V reference rail ensuring <±0.5 LSB integral nonlinearity over temperature. Use Value: ±2% output accuracy and <2.6 mV load regulation preserve signal chain dynamic range without post-regulation calibration. | Use Scenario: Powering LoRaWAN or NB-IoT modem ICs in battery-operated environmental sensors deployed for >10-year field life. IC Role / Device Role / Timing Role: Always-on 2.8 V supply for MCU, radio, and wake-up timer circuits operating in sub-µA sleep modes. Use Value: Adaptive ground current cuts average system current by 30% versus fixed-IQ LDOs, directly extending operational lifetime per battery charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/MB | 300 mA rated, 1.6 µA IQ, but higher 25 µVRMS noise and no active discharge. | Suitable for non-RF, cost-sensitive industrial sensors where noise immunity is secondary. | Select when lowest possible quiescent current dominates over RF noise performance and sequencing control. |
| TLS820B2L1ETV50 | Automotive-grade AEC-Q100 qualified, 250 mA, 20 µA IQ, but requires 2.2 µF min. COUT and lacks EN-controlled discharge. | Targeted at automotive body electronics where qualification and extended temperature range are mandatory. | Select only for automotive programs requiring -40 °C to +150 °C operation and ASIL-B compliance. |
Compared with MCP1700T-2802E/MB and TLS820B2L1ETV50, the NCP702SN28T1G uniquely combines RF-grade noise performance (11 µVRMS), active discharge, and 1 µF stability in a TSOP-5 package-making it optimal for space-constrained, noise-sensitive portable designs where BOM simplification and precise power sequencing matter.
Availability
NCP702SN28T1G is available at Aetrix Electronics and suitable for GNSS receivers, wireless audio transceivers, and portable ECG monitors requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for NCP702SN28T1G 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP702 series is part of onsemi's precision analog portfolio, engineered specifically for battery-powered portable electronics demanding ultra-low noise, ultra-low quiescent current, and minimal external component count.
FAQ
What is the maximum input voltage rating for the NCP702SN28T1G?
The NCP702SN28T1G has an absolute maximum input voltage of 6 V, with recommended operating range from 2.0 V to 5.5 V. Exceeding 6 V risks permanent damage. For reliable operation with margin, design inputs to stay ≤5.5 V, especially under transient conditions like hot-swap or load-dump events.
Does the NCP702SN28T1G require an external noise-bypass capacitor?
No, the NCP702SN28T1G achieves 11 µVRMS output noise (100 Hz–100 kHz) without any external noise-bypass capacitor. This is enabled by internal filtering architecture-confirmed in the datasheet Figure 3–8 and Applications Information section. Adding one provides no measurable benefit and wastes board area.
How does the adaptive ground current feature work in the NCP702SN28T1G?
The NCP702SN28T1G dynamically scales its internal bias current: 10 µA at zero load, rising to 60 µA at 2 mA and 160 µA at 200 mA. This preserves transient response while minimizing idle power-critical for battery longevity in intermittent-use devices like wearables and remote sensors.
What is the purpose of the N/C pin (Pin 5) on the NCP702SN28T1G TSOP-5 package?
Pin 5 is a no-connect terminal with no internal bond wire. Per datasheet Table 1, it may be tied to GND to enhance thermal conduction from the die paddle through the PCB copper, improving power dissipation capability by up to 15% in thermally constrained layouts-but it serves no electrical function.
Can the NCP702SN28T1G be used with a 0.8 V output capacitor?
No-the NCP702SN28T1G is a fixed 2.8 V output device (denoted by "N28" in the part number). It cannot regulate 0.8 V. For 0.8 V output, select NCP702SN08T1G instead. Using incorrect output voltage variants risks system malfunction due to undervoltage or overvoltage stress on downstream ICs.
NCP702SN28T1G 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):
- -
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 16 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
NCP702SN28T1G FAQ
1.How can I place an order for NCP702SN28T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP702SN28T1G 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 NCP702SN28T1G reliable?
The price and inventory of NCP702SN28T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP702SN28T1G is usually 5 days.
3.What payment methods are accepted for NCP702SN28T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP702SN28T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP702SN28T1G?
NCP702SN28T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP702SN28T1G 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 NCP702SN28T1G?
For technical support, including NCP702SN28T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP702SN28T1G requirements.
6.How does Aetrix verify that NCP702SN28T1G is sourced from the original manufacturer or authorized distributors?
All NCP702SN28T1G 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 NCP702SN28T1G meets industry standards.
7.What is the process for return or replacement of NCP702SN28T1G?
All NCP702SN28T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP702SN28T1G, 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 NCP702SN28T1G part is unused and in its original packaging.
Return procedure for NCP702SN28T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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