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onsemi NCP103AMX120TCG
- Part No.:
- NCP103AMX120TCG
- Manufacturer:
- onsemi
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
NCP103AMX120TCG.pdf
- Description:
- IC REG LINEAR 1.2V 150MA 4UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,605
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Product details
Overview
NCP103AMX120TCG from onsemi is a 150 mA CMOS low-dropout linear regulator with fixed 1.2 V output, active output discharge function, ±1% output accuracy at room temperature, 75 mV typical dropout at 150 mA (VOUT = 2.8 V), and stable operation with only 1 µF ceramic output capacitor - designed for noise-sensitive, space-constrained battery-powered applications including portable medical devices and wireless handsets.
For engineers reviewing the NCP103AMX120TCG datasheet, pinout, applications, or equivalent options, key selection considerations include its ultra-low quiescent current (50 µA typ.), enable-controlled shutdown (0.1 µA standby), thermal shutdown (160°C), current limit (550 mA typ.), and compatibility with minimal 1 µF X5R/X7R output capacitance in uDFN4 1.0×1.0 mm package.
Technical Context
The NCP103AMX120TCG employs a PMOS pass transistor architecture enabling low dropout and inherent reverse-current protection mitigation. Its dynamic quiescent current adjustment optimizes IQ across load conditions, while integrated active output discharge (enabled only in "A" suffix variants) pulls VOUT to GND via a 100 Ω internal resistor during disable.
Internal protections include foldback current limiting (550 mA typ. at 90% VOUT), thermal shutdown with 20°C hysteresis (trip at 160°C, reset at 140°C), and ESD robustness (2 kV HBM). It achieves 75 dB PSRR at 1 kHz and 60 µVRMS output noise (10 Hz–100 kHz) under 150 mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±1% at room temperature - ensures precise biasing for low-voltage logic and analog circuitry without external feedback components. |
| Max Output Current | 150 mA continuous - supports power delivery to multiple low-power ICs (e.g., sensors, RF transceivers) in compact portable systems. |
| Dropout Voltage | 75 mV typical at 150 mA (for VOUT ≥ 2.8 V); 180–235 mV at 150 mA for 1.5 V output - enables regulation from batteries down to ~1.4 V while maintaining full output. |
| Quiescent Current | 50 µA typical at no load - extends battery life in always-on or sleep-mode subsystems (e.g., real-time clocks, wake-up controllers). |
| PSRR | 75 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters, critical for ADC reference stability and RF signal integrity. |
| Output Noise | 60 µVRMS (10 Hz–100 kHz) - meets stringent noise requirements for precision analog front-ends and low-noise amplifiers. |
| Enable Threshold | VEN_HI = 0.9 V, VEN_LO = 0.4 V - compatible with standard GPIO logic levels and allows direct connection to microcontroller I/O pins without level-shifting. |
Pinout & Package
Package: uDFN4 1.0 × 1.0 mm, 0.65 mm pitch, exposed pad (EPAD) - thermally enhanced for high-power-density layouts; requires direct soldering of EPAD to GND plane for optimal thermal performance (RJA = 170°C/W on 1 oz FR4 with 645 mm² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output voltage node | Delivers stable 1.2 V; requires ≥1 µF ceramic capacitor to GND for stability; connects directly to load circuitry. |
| 2 - GND | Power ground reference | Common return path for input, output, and enable; must be tied to large PCB ground plane and EPAD for thermal/EMI control. |
| 3 - EN | Enable control input | Active-high logic input; >0.9 V enables regulation; <0.4 V disables regulator and activates output discharge (100 Ω to GND). |
| 4 - IN | Input voltage supply | Accepts 1.7–5.5 V input; requires local 1 µF ceramic decoupling capacitor to minimize input impedance and transient coupling. |
| EPAD | Thermal and electrical ground pad | Must be soldered to GND plane; primary heat dissipation path - omission degrades thermal performance and may trigger premature thermal shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Active output discharge | Integrated 100 Ω pull-down on OUT during shutdown - prevents floating outputs and ensures predictable power sequencing in multi-rail systems. |
| Ultra-low IQ optimization | Dynamic quiescent current adjustment reduces IQ to 50 µA at no load and scales with output current - maximizes battery runtime in intermittent-use applications. |
| Stability with minimal capacitance | Guaranteed stability with 1 µF X5R/X7R ceramic output capacitor - eliminates need for larger, higher-ESR tantalum or electrolytic capacitors, saving board space and cost. |
| High PSRR across frequency | 75 dB at 1 kHz, maintained up to 100 kHz with proper COUT selection - rejects ripple from noisy switchers without requiring additional filtering stages. |
| Robust protection suite | Thermal shutdown (160°C), current limit (550 mA), and short-circuit immunity - enables reliable operation in unattended or harsh-environment deployments. |
Applications
| Portable Medical Sensors | Wireless Handset Baseband |
|---|---|
Use Scenario: Powering low-noise analog front-end (AFE) and microcontroller in wearable ECG/SpO₂ monitors operating from single-cell Li-ion. IC Role / Device Role / Timing Role: Primary 1.2 V LDO supplying ADC reference, sensor bias, and MCU core - replacing less accurate or noisier alternatives. Use Value: 60 µVRMS output noise and 75 dB PSRR ensure clean analog measurements; 50 µA IQ extends battery life beyond 7 days in clinical-grade logging mode. | Use Scenario: Regulating 1.2 V supply for baseband processor and RF transceiver in Bluetooth 5.0 earbuds with aggressive size constraints. IC Role / Device Role / Timing Role: Low-noise, low-IQ post-regulator after buck converter - delivering stable core voltage during burst-mode RF transmission. Use Value: 1.0×1.0 mm uDFN4 footprint fits tight layout; active discharge prevents voltage hold-up on power-down, enabling fast system reset and reducing leakage paths. |
| Smartphone Camera Modules | IoT Edge Node Microcontrollers |
Use Scenario: Providing 1.2 V bias to image signal processor (ISP) and CIS interface in multi-camera smartphone modules. IC Role / Device Role / Timing Role: Dedicated LDO for noise-sensitive imaging chain - isolated from noisy digital rails via physical separation and local decoupling. Use Value: ±1% output accuracy maintains consistent ISP gain calibration; 75 mV dropout allows operation down to 1.32 V input as battery discharges. | Use Scenario: Supplying 1.2 V to ARM Cortex-M0+ MCU and sub-GHz RF SoC in battery-operated environmental sensor nodes. IC Role / Device Role / Timing Role: Always-on LDO powering RTC, wake-up comparator, and low-power peripherals during deep-sleep cycles. Use Value: 0.1 µA shutdown current minimizes annual self-discharge; enable pin allows host MCU to gate power to peripheral subsystems on demand. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1202E/TT | 150 mA, 1.2 V fixed, 1.6 µA IQ, no active discharge, SOT-23-5 package | Larger footprint, lower IQ but no output discharge - suitable where board area is less constrained and sequencing is handled externally | Select when ultra-low IQ dominates over sequencing control and thermal density is not limiting. |
| Torex XC6206P122MR-G | 150 mA, 1.2 V fixed, 1 µA IQ, no enable pin, SOT-25 package | No enable control or active discharge; simpler interface but lacks programmable power management | Choose for cost-sensitive, always-on applications where enable functionality and controlled shutdown are unnecessary. |
Compared with MCP1700T-1202E/TT and XC6206P122MR-G, the NCP103AMX120TCG uniquely combines ultra-small 1.0×1.0 mm uDFN4 packaging, active output discharge, and 50 µA IQ - making it optimal for space-constrained, sequenced-power IoT and portable medical designs where both efficiency and deterministic power-down behavior are required.
Availability
NCP103AMX120TCG is available at Aetrix Electronics and suitable for portable medical equipment, wireless handsets, and IoT edge nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant, halogen-free packaging.
Supply support for NCP103AMX120TCG 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier focused on energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, and medical markets.
The NCP103 series is part of onsemi's precision analog portfolio, engineered specifically for battery-powered portable electronics demanding ultra-low IQ, high PSRR, and minimal solution size - with emphasis on reliability in consumer and medical-grade applications.
FAQ
What is the output voltage tolerance of the NCP103AMX120TCG over temperature?
The NCP103AMX120TCG provides ±1% output voltage accuracy at room temperature (25°C). Over the full operating junction temperature range (−40°C to +85°C), the output voltage deviation remains within ±40 mV for 1.2 V output - confirmed by Figure 3 in the datasheet showing VOUT variation of ±0.01 V across temperature at 1 mA and 150 mA loads. This ensures stable biasing for sensitive analog circuits across environmental extremes.
Does the NCP103AMX120TCG require an external capacitor on the EN pin?
No, the NCP103AMX120TCG does not require an external capacitor on the EN pin. Its EN input has an internal pull-down current source (300 nA typical) that guarantees turn-off when left floating. For robust noise immunity in electrically noisy environments, a small RC filter (e.g., 100 kΩ + 100 pF) may be added, but it is not mandatory for basic operation. The NCP103AMX120TCG functions reliably with EN tied directly to MCU GPIO or to IN for always-on use.
Can the NCP103AMX120TCG operate with a 1.5 V input supply?
No, the NCP103AMX120TCG cannot regulate with a 1.5 V input. Its minimum operating input voltage is 1.7 V per the Absolute Maximum Ratings and Electrical Characteristics tables. At 1.2 V output and 150 mA load, the dropout voltage is 180–235 mV - meaning the minimum functional input is ~1.38–1.44 V - but the device will not power up or enable below 1.7 V VIN due to internal biasing requirements. Operation below 1.7 V is outside specification and not guaranteed.
How does the active output discharge function work in the NCP103AMX120TCG?
When the EN pin voltage falls below 0.4 V, the NCP103AMX120TCG disables regulation and activates an internal 100 Ω NMOS transistor between OUT and GND. This actively discharges the output capacitor, pulling VOUT to ground within microseconds - preventing residual voltage from interfering with downstream logic states or causing latch-up. The discharge current is limited by the 100 Ω resistance and output capacitance value, and the NCP103AMX120TCG consumes only 0.1 µA in this state.
Is the NCP103AMX120TCG compatible with 0402-size ceramic capacitors?
Yes, the NCP103AMX120TCG is fully compatible with 0402-size X5R/X7R ceramic capacitors for both CIN and COUT. The datasheet explicitly recommends 1 µF 0402 MLCCs due to their low ESL/ESR and suitability for high-frequency noise suppression. However, designers must account for DC bias derating: a 0402 1 µF X7R capacitor may deliver only ~0.22–0.33 µF effective capacitance at 1.2 V bias - still above the 0.22 µF minimum required for stability per the Applications Information section.
NCP103AMX120TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 4-UDFN 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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 95 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-UDFN (1.0x1.0)
NCP103AMX120TCG FAQ
1.How can I place an order for NCP103AMX120TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP103AMX120TCG 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 NCP103AMX120TCG reliable?
The price and inventory of NCP103AMX120TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP103AMX120TCG is usually 5 days.
3.What payment methods are accepted for NCP103AMX120TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP103AMX120TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP103AMX120TCG?
NCP103AMX120TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP103AMX120TCG 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 NCP103AMX120TCG?
For technical support, including NCP103AMX120TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP103AMX120TCG requirements.
6.How does Aetrix verify that NCP103AMX120TCG is sourced from the original manufacturer or authorized distributors?
All NCP103AMX120TCG 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 NCP103AMX120TCG meets industry standards.
7.What is the process for return or replacement of NCP103AMX120TCG?
All NCP103AMX120TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP103AMX120TCG, 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 NCP103AMX120TCG part is unused and in its original packaging.
Return procedure for NCP103AMX120TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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