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onsemi NCP730ASN280T1G
- Part No.:
- NCP730ASN280T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP730ASN280T1G.pdf
- Description:
- IC REG LINEAR 2.8V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,991
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Product details
Overview
NCP730ASN280T1G from onsemi is a 2.8 V fixed-output CMOS low-dropout (LDO) regulator delivering up to 150 mA output current with 38 V maximum input voltage, 1.8 µA typical quiescent current (Version B), and integrated power-good (PG) output. It features 290 mV typical dropout at 150 mA, ±1% output voltage accuracy, and stable operation with 1 µF ceramic output capacitors - designed for always-on battery-powered systems requiring reliable low-power regulation.
For engineers reviewing the NCP730ASN280T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.8 V fixed output, PG functionality for power sequencing, ultra-low IQ in Version B, wide 2.7–38 V input range, and TSOP-5 package compatibility with thermal-aware PCB layout.
Technical Context
The NCP730ASN280T1G implements a CMOS-based LDO architecture with internal bandgap reference (1.2 V), error amplifier, and PMOS pass transistor. Its Version B configuration includes a dedicated PG comparator monitoring VOUT against 93% of nominal output, with deglitching (160 µs typ.) and delay timing (320 µs typ.) to prevent false assertions during transients.
It integrates soft-start to suppress inrush current, UVLO (1.95 V typ. turn-on threshold), thermal shutdown (165 °C), and current limiting (280 mA typ.). The device operates across −40 °C to +125 °C junction temperature and supports fast load transient response due to low output impedance and optimized internal compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±1% over −40 °C to +125 °C - ensures stable MCU core or sensor bias supply without external resistors. |
| Input Voltage Range | 2.7 V to 38 V - supports direct connection to automotive batteries (12 V/24 V), industrial rails, or wide-range DC inputs. |
| Quiescent Current | 1.8 µA typ. (Version B) - enables multi-year battery life in remote sensors or always-on IoT nodes. |
| Dropout Voltage | 290 mV typ. at 150 mA - maintains regulation down to VIN = 3.09 V, critical for brownout resilience. |
| Power Good Output | Dedicated open-drain PG pin asserting high when VOUT ≥ 93% of 2.8 V - used for microcontroller reset or system power sequencing. |
| Capacitor Stability | Stable with ≥1 µF X7R/X5R ceramic output capacitor - eliminates need for large tantalum or electrolytic caps. |
| Thermal Protection | Thermal shutdown at 165 °C with 20 °C hysteresis - prevents permanent damage under sustained overload or poor heatsinking. |
Pinout & Package
Package: TSOP-5 (Case 483, SN suffix), surface-mount, 5-pin leaded package with exposed pad not present - optimized for compact board area and moderate power dissipation (RthJA = 178 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input power supply | Accepts 2.7–38 V input; requires local 1 µF ceramic decoupling close to pin. |
| 2 GND | Ground reference | Primary return path for load current and internal circuitry; must connect to low-impedance ground plane. |
| 3 EN | Enable control | Active-high logic input (0.9 V typ. threshold); internally pulled up - tie to IN or leave floating for always-on operation. |
| 4 ADJ/PG/NC | Multi-function terminal | In NCP730ASN280T1G (fixed 2.8 V, Version B), this is PG output - open-drain, sinks up to 3 mA, asserts high when VOUT ≥ 2.604 V. |
| 5 OUT | Regulated output | Delivers 2.8 V ±1% at up to 150 mA; requires 1 µF ceramic capacitor directly between OUT and GND. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.8 µA typ. enables >10-year battery life in 10 µA average-load applications like smart meters. |
| Integrated power-good indicator | PG pin provides precise, glitch-filtered status for safe microcontroller boot and fault detection without external comparators. |
| Wide input voltage range | 2.7–38 V operation eliminates need for pre-regulation stages in automotive or industrial 24 V systems. |
| Low dropout with high current | 290 mV dropout at 150 mA allows efficient regulation even near battery end-of-life (e.g., 3.0 V input for 2.8 V output). |
| Small-ceramic-capacitor stability | Guaranteed stability with 1 µF X7R/X5R output cap - reduces BOM cost, footprint, and aging concerns vs. electrolytics. |
Applications
| Battery-Powered Remote Sensors | Industrial Metering Systems |
|---|---|
Use Scenario: Long-life wireless temperature/humidity node powered by two AA alkaline cells (1.8–3.2 V) with 15-year target lifetime. IC Role / Device Role / Timing Role: Primary 2.8 V LDO supplying RF transceiver and ultra-low-power MCU, with PG enabling clean wake-up sequence. Use Value: 1.8 µA IQ extends battery life beyond 12 years; 290 mV dropout sustains regulation until cell voltage drops to ~3.09 V. | Use Scenario: Smart electricity meter operating from 3-phase rectified rail (up to 38 V DC) with isolated communication interface. IC Role / Device Role / Timing Role: Post-regulator for isolated ADC and real-time clock, rejecting ripple from upstream switching converter. Use Value: 70 dB PSRR at 10 kHz suppresses switching noise; ±1% accuracy ensures metrology-grade reference stability. |
| Home Automation Controllers | White Goods Control Boards |
Use Scenario: Central hub managing Zigbee/Z-Wave devices, powered from 12 V wall adapter with variable load (1–150 mA). IC Role / Device Role / Timing Role: Main 2.8 V supply for SoC and memory, with EN controlled by system supervisor IC. Use Value: EN pin enables dynamic power gating; soft-start prevents inrush-induced brownouts during cold boot. | Use Scenario: Washing machine main control board exposed to 24 V DC bus with motor drive noise and thermal cycling. IC Role / Device Role / Timing Role: Regulated 2.8 V source for display driver and touch controller, surviving repeated thermal shutdown events. Use Value: Thermal shutdown (165 °C) + hysteresis (20 °C) prevents latch-up; robust ESD rating (2 kV HBM) withstands assembly handling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2802E/MB | 2.8 V fixed, 250 mA output, 1.8 µA IQ, but no PG output and max input 13.2 V. | Lacks power sequencing capability; unsuitable for systems requiring regulated-rail validation before MCU boot. | Select only if input voltage stays ≤13.2 V and PG is unnecessary - lower cost, same IQ. |
| TLD1128-11ES | 2.8 V fixed, 150 mA, 2.5 µA IQ, integrated watchdog timer, but no PG and max input 40 V. | Includes safety monitor but adds complexity; lacks dedicated PG assertion for simple reset signaling. | Prefer when functional safety (ASIL-B) is required; avoid if only basic power-good signaling is needed. |
Compared with MCP1703T-2802E/MB and TLD1128-11ES, the NCP730ASN280T1G uniquely combines 38 V input tolerance, 1.8 µA IQ, and integrated PG in TSOP-5 - making it optimal for space-constrained, battery-backed, or automotive-adjacent systems needing verified power-up sequencing.
Availability
NCP730ASN280T1G is available at Aetrix Electronics and suitable for battery-powered remote sensors, industrial metering systems, and home automation controllers requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for NCP730ASN280T1G 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 NCP730 family is engineered for ultra-low-power, high-input-voltage LDO regulation in always-on systems - targeting battery longevity, wide-input resilience, and integration of power-good signaling without external components.
FAQ
What is the maximum input voltage rating for the NCP730ASN280T1G?
The NCP730ASN280T1G has an absolute maximum input voltage rating of 40 V, with recommended continuous operation up to 38 V. This enables direct use with 24 V industrial rails or rectified 3-phase supplies. Exceeding 40 V risks permanent damage per the Absolute Maximum Ratings table in the datasheet. Operation at 38 V is fully characterized across temperature and load conditions.
Does the NCP730ASN280T1G require external capacitors, and what values are recommended?
Yes, the NCP730ASN280T1G requires both input (CIN) and output (COUT) capacitors. A minimum 1 µF X7R or X5R ceramic capacitor is required at the output, placed as close as possible to the OUT and GND pins. Input capacitance should also be ≥1 µF ceramic, located near the IN pin. Larger values improve transient response and PSRR, but stability is guaranteed from 1 µF to 100 µF per the datasheet.
How does the power-good (PG) function operate on the NCP730ASN280T1G?
The PG pin on the NCP730ASN280T1G is an open-drain output that goes high (pulled up externally or by host) when VOUT reaches and remains ≥93% of 2.8 V (i.e., ≥2.604 V). It includes 160 µs deglitching and 320 µs delay to reject short transients. When VOUT falls below threshold, PG pulls low. This signal is used for microcontroller reset or power sequencing - no external components are needed beyond a pull-up resistor.
What is the thermal performance of the NCP730ASN280T1G in TSOP-5 package?
In the TSOP-5 package, the NCP730ASN280T1G has a junction-to-air thermal resistance (RthJA) of 178 °C/W under JEDEC standard board conditions. With 150 mA load and 38 V input, power dissipation reaches ~5.3 W - requiring careful PCB copper area design or derating. Thermal shutdown activates at 165 °C with 20 °C hysteresis, protecting the device during sustained overload or poor heatsinking.
Is the NCP730ASN280T1G compatible with lead-free reflow soldering processes?
Yes, the NCP730ASN280T1G is Pb-free and RoHS compliant, qualified for standard lead-free reflow profiles including peak temperatures up to 260 °C. The TSOP-5 package meets J-STD-020 moisture sensitivity level (MSL) 1, meaning it can be stored indefinitely at ≤30 °C/85% RH without baking prior to assembly.
NCP730ASN280T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 38V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.48V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 2.5 µA
- Current - Supply (Max):
- 450 µA
- PSRR:
- 80dB ~ 48dB (10Hz ~ 1MHz)
- Control Features:
- Enable, Soft Start
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP730ASN280T1G FAQ
1.How can I place an order for NCP730ASN280T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP730ASN280T1G 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 NCP730ASN280T1G reliable?
The price and inventory of NCP730ASN280T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP730ASN280T1G is usually 5 days.
3.What payment methods are accepted for NCP730ASN280T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP730ASN280T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP730ASN280T1G?
NCP730ASN280T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP730ASN280T1G 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 NCP730ASN280T1G?
For technical support, including NCP730ASN280T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP730ASN280T1G requirements.
6.How does Aetrix verify that NCP730ASN280T1G is sourced from the original manufacturer or authorized distributors?
All NCP730ASN280T1G 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 NCP730ASN280T1G meets industry standards.
7.What is the process for return or replacement of NCP730ASN280T1G?
All NCP730ASN280T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP730ASN280T1G, 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 NCP730ASN280T1G part is unused and in its original packaging.
Return procedure for NCP730ASN280T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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