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onsemi NCP177BMX070TCG
- Part No.:
- NCP177BMX070TCG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP177BMX070TCG.pdf
- Description:
- IC REG LINEAR 0.7V 500MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,750
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Product details
Overview
NCP177BMX070TCG from onsemi is a CMOS low-dropout (LDO) linear voltage regulator delivering 500 mA output current with 0.7 V fixed output voltage, 1.6 V minimum input voltage, and 200 mV typical dropout at 500 mA (VOUT = 1.8 V). It features ±0.8% output voltage accuracy, 60 µA quiescent current, and thermal shutdown at 175°C - optimized for powering noise-sensitive analog and digital circuitry in space-constrained portable systems.
For engineers reviewing the NCP177BMX070TCG datasheet, pinout, applications, or equivalent options, key selection considerations include its fixed 0.7 V output, absence of output discharge (NCP177B variant), XDFN4 1 mm × 1 mm package, fast transient response, and compatibility with 1 µF ceramic output capacitors.
Technical Context
The NCP177BMX070TCG implements a PMOS pass transistor architecture enabling ultra-low dropout and reverse-current protection via inherent body diode management. Its adaptive ground current design maintains 60 µA quiescent current at no load while scaling with output current to preserve efficiency across operating conditions.
Internal circuitry includes precision bandgap reference, soft-start control, overcurrent limiting (750 mA typ.), and thermal shutdown with 20°C hysteresis. Unlike the NCP177A variant, the NCP177BMX070TCG omits active output discharge, eliminating the 60 Ω internal pull-down path when disabled - critical for systems requiring output voltage hold-up during enable transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.7 V - enables direct core supply for ultra-low-voltage logic and RF biasing without external feedback network. |
| Max Output Current | 500 mA - supports moderate-power subsystems such as image sensor analog front-ends or MCU cores with burst-mode operation. |
| Dropout Voltage | 295 mV typ. at 500 mA (VOUT = 0.7 V) - allows regulation from 1.0 V input, extending battery runtime in single-cell Li-ion or NiMH applications. |
| Quiescent Current | 60 µA typ. at no load - minimizes standby power loss in always-on sensor nodes and wearable devices. |
| PSRR | 75 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters, preserving signal integrity in ADC reference or PLL supply rails. |
| Thermal Shutdown | 175°C with 20°C hysteresis - provides robust fault recovery during sustained overload or poor PCB thermal design without latch-up. |
| Stability | Guaranteed with ≥1 µF X7R/X5R ceramic output capacitor - eliminates need for high-ESR tantalum or electrolytic capacitors, reducing BOM count and board area. |
Pinout & Package
Package: XDFN4 (Case 711AJ), 1.0 mm × 1.0 mm × 0.4 mm, leadless with exposed thermal pad (EPAD) tied to ground plane for enhanced thermal dissipation (θJA = 223°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output voltage node | Delivers stable 0.7 V to load; requires 1 µF ceramic capacitor placed adjacent to pin for transient stability and PSRR optimization. |
| 2 - GND | Power supply ground reference | Primary return path for load current and internal bias; must be connected to low-impedance ground plane, including EPAD. |
| 3 - EN | Enable control input (active-high) | Drives internal pass transistor; >1.0 V enables regulation, <0.4 V disables output - no output discharge in NCP177B variant. |
| 4 - IN | Input voltage supply node | Accepts 1.6–5.5 V input; requires local 1 µF ceramic capacitor to suppress source impedance effects during load transients. |
| EPAD | Exposed thermal pad | Not electrically functional but thermally critical - must be soldered to solid ground copper area to maintain TJ ≤ 125°C under full load. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 60 µA typ. at zero load - extends battery life in energy-harvesting and coin-cell-powered IoT endpoints. |
| No output discharge circuit | Eliminates 60 Ω internal pull-down path - preserves output voltage during disable state for systems requiring controlled power sequencing or backup rail retention. |
| Fast transient response | Sub-20 µs recovery from 50% load step (1 mA ↔ 500 mA) - maintains regulation during digital core wake/sleep transitions without external compensation. |
| High PSRR at 1 kHz | 75 dB - rejects ripple from switching regulators feeding the LDO input, critical for RF transceiver VCO and ADC reference supplies. |
| Robust protection suite | Integrated overcurrent limit (750 mA typ.), thermal shutdown (175°C), and ESD tolerance (2 kV HBM) - reduces need for external protection components in consumer-grade designs. |
Applications
| Mobile Image Sensor Power | Ultra-Low-Voltage MCU Core Supply |
|---|---|
|
Use Scenario: Powers analog front-end and pixel array of 1/2.8" CMOS image sensors in smartphones and security cameras. IC Role / Device Role / Timing Role: Provides clean, low-noise 0.7 V bias for sensor substrate and analog signal chain - directly referenced to internal bandgap. Use Value: 54 µVRMS output noise and 75 dB PSRR prevent fixed-pattern noise and quantization errors in 12-bit+ image capture. |
Use Scenario: Supplies core voltage to ARM Cortex-M0+/M33 microcontrollers operating in deep-sleep mode with sub-1 V logic. IC Role / Device Role / Timing Role: Delivers regulated 0.7 V to CPU core domain while maintaining <60 µA quiescent draw during retention state. Use Value: Enables 10-year battery life in sealed industrial monitors by minimizing leakage during 99.9% duty-cycle sleep periods. |
| Wearable Biometric Sensor Bias | RF Transceiver Sub-1 V Bias Rail |
|
Use Scenario: Generates stable 0.7 V for optical heart-rate monitor (PPG) LED drivers and photodiode amplifiers in smartwatches. IC Role / Device Role / Timing Role: Acts as low-noise analog supply rail decoupled from noisy digital domains - enabled only during measurement bursts. Use Value: 200 mV dropout at 500 mA allows operation down to 0.9 V battery voltage, extending usable capacity in single-cell LiPo systems. |
Use Scenario: Supplies 0.7 V to RF power amplifier bias networks and mixer LO paths in sub-GHz ISM-band transceivers. IC Role / Device Role / Timing Role: Functions as ultra-stable local bias generator isolated from digital switching noise on shared PCB layers. Use Value: 0.8% output accuracy ensures consistent gain and linearity across temperature, reducing factory calibration overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B072MR-G | 0.7 V fixed output, 300 mA max, 150 mV dropout at 300 mA, SOT-25 package (2.9 × 2.8 mm) | Lower current capability and larger footprint - suitable only for sub-300 mA loads where board area is not constrained. | Select when cost sensitivity outweighs size and performance requirements; verify thermal derating at 500 mA. |
| ROHM BD70522GUL | 0.7 V fixed output, 500 mA, 170 mV dropout at 500 mA, DFN1212-4 (1.2 × 1.2 mm), includes output discharge | Includes active discharge (NCP177A function), slightly larger footprint, lower dropout - trades off discharge functionality for marginally better efficiency. | Choose if system requires rapid output discharge during disable; otherwise NCP177BMX070TCG offers superior thermal resistance (223 vs. ~260°C/W) in same current class. |
Compared with XC6210B072MR-G and BD70522GUL, the NCP177BMX070TCG delivers identical 0.7 V output and 500 mA rating in the smallest footprint (1.0 × 1.0 mm), with best-in-class thermal resistance and no compromise on output hold-up behavior - making it optimal for miniaturized, thermally challenged portable designs.
Availability
NCP177BMX070TCG is available at Aetrix Electronics and suitable for mobile image sensors, ultra-low-voltage MCU cores, and wearable biometric sensor biasing requiring stable component supply, long-lifecycle support, and Pb-free compliance.
Supply support for NCP177BMX070TCG 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, serving automotive, industrial, cloud, and IoT markets with discrete, analog, and power management solutions.
The NCP177 series belongs to onsemi's high-performance LDO portfolio designed specifically for battery-powered portable equipment demanding ultra-low dropout, nanoscale packaging, and minimal quiescent power - targeting next-generation wearables, imaging modules, and edge AI sensors.
FAQ
What is the output voltage tolerance of the NCP177BMX070TCG over temperature?
The NCP177BMX070TCG guarantees ±1.2% output voltage accuracy over −40°C to +85°C ambient temperature range. At 25°C, tolerance tightens to ±0.8%, and the device exhibits monotonic drift of less than ±0.05%/°C across its full operating range - verified per onsemi's Electrical Characteristics table on page 3 of the datasheet.
Does the NCP177BMX070TCG require an external resistor divider for output voltage setting?
No, the NCP177BMX070TCG is a fixed-output LDO with factory-trimmed 0.7 V regulation - no external resistors are needed. This eliminates component count, layout complexity, and voltage-setting errors associated with adjustable variants like the NCP177AMX070TCG, which shares identical package and pinout but includes output discharge.
Can the NCP177BMX070TCG operate with input voltage below 1.6 V?
No - the absolute minimum input voltage for functional regulation is 1.6 V, as specified in Absolute Maximum Ratings and Electrical Characteristics. Attempting operation below this threshold risks unregulated output, increased dropout, or complete failure to regulate; for sub-1.6 V inputs, consider buck-boost architectures or alternative ultra-low-VIN LDOs.
How does the enable pin behavior differ between NCP177BMX070TCG and NCP177AMX070TCG?
The NCP177BMX070TCG lacks output discharge: when EN is low, the pass transistor turns off and OUT floats. In contrast, the NCP177AMX070TCG activates a 60 Ω internal pull-down to GND upon disable. This distinction is critical for systems where output voltage must remain stable after disable - only the "B" variant (NCP177BMX070TCG) satisfies that requirement.
What is the recommended PCB copper area for thermal management of the NCP177BMX070TCG at 500 mA?
For continuous 500 mA operation at 25°C ambient, onsemi recommends ≥300 mm² of 1 oz copper connected to the EPAD and GND pins (per Figure 28, page 8). With this layout, junction temperature remains ≤125°C; reducing copper area below 200 mm² risks exceeding thermal limits - verified using θJA = 223°C/W and PD = (VIN − 0.7 V) × 0.5 A + 0.00006 A × VIN.
NCP177BMX070TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 4-XDFN 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):
- 0.7V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-XDFN (1x1)
NCP177BMX070TCG FAQ
1.How can I place an order for NCP177BMX070TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP177BMX070TCG 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 NCP177BMX070TCG reliable?
The price and inventory of NCP177BMX070TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP177BMX070TCG is usually 5 days.
3.What payment methods are accepted for NCP177BMX070TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP177BMX070TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP177BMX070TCG?
NCP177BMX070TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP177BMX070TCG 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 NCP177BMX070TCG?
For technical support, including NCP177BMX070TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP177BMX070TCG requirements.
6.How does Aetrix verify that NCP177BMX070TCG is sourced from the original manufacturer or authorized distributors?
All NCP177BMX070TCG 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 NCP177BMX070TCG meets industry standards.
7.What is the process for return or replacement of NCP177BMX070TCG?
All NCP177BMX070TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP177BMX070TCG, 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 NCP177BMX070TCG part is unused and in its original packaging.
Return procedure for NCP177BMX070TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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