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onsemi NCP4688DMU12TCG
- Part No.:
- NCP4688DMU12TCG
- Manufacturer:
- onsemi
- Package:
- -
- Datasheet:
-
NCP4688DMU12TCG.pdf
- Description:
- IC REG LINEAR 1.2V 150MA 4UDFN
- Quantity:
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Inventory:9,930
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Product details
Overview
NCP4688DMU12TCG from onsemi is a 150 mA, low-noise CMOS LDO linear voltage regulator with 1.2 V fixed output, ±1% accuracy over −40°C to +85°C, 10 µVRMS output noise, and 80 dB PSRR at 1 kHz-designed for powering sensitive RF modules and low-voltage microcontrollers in space-constrained portable electronics.
For engineers reviewing the NCP4688DMU12TCG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN 1.0×1.0 mm package details, enable-controlled power sequencing, auto-discharge functionality, and real-world application context for industrial and consumer embedded designs.
Technical Context
The NCP4688DMU12TCG integrates a precision bandgap reference, low-noise error amplifier, and NMOS pass transistor with integrated autodischarge path (60 Ω RDS(ON)). Its CE pin enables high-side logic control ("H" active), with internal pull-down ensuring safe default-off state when floating.
Designed for input voltages from 2.0 V to 5.25 V, it maintains regulation down to a 200 mV dropout at 150 mA (for 1.2 V output) and achieves stable operation with only 1.0 µF ceramic input/output capacitors-no external compensation required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±1% (−40°C to +85°C); ensures stable core supply for 1.2 V logic rails without external feedback. |
| Max Output Current | 150 mA continuous; sufficient for powering single-core MCUs, RF transceivers, or sensor signal chains. |
| Output Noise | 10 µVRMS (10 Hz–100 kHz); minimizes phase noise in local oscillators and jitter in ADC clocking paths. |
| PSRR | 80 dB @ 1 kHz, 75 dB @ 10 kHz; suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Dropout Voltage | 200 mV typical @ 150 mA; enables efficient operation from 1.4 V input (e.g., single LiFePO4 cell or boosted 1.2 V rail). |
| Quiescent Current | 80 µA typical @ VOUT > 4.1 V; supports ultra-low-power always-on subsystems with minimal battery drain. |
| Enable Threshold | VCEH = 1.0 V min, VCEL = 0.4 V max; compatible with 1.8 V and 3.3 V GPIOs without level-shifting. |
Pinout & Package
Package: UDFN-4 (1.0 mm × 1.0 mm, 0.65 mm pitch), Case 517BR, Pb-free, exposed pad (EP) - optimized for thermal performance in high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EP) | Exposed Pad | Thermal and electrical ground connection; must be soldered to PCB ground plane for optimal thermal dissipation (RJA = 250°C/W). |
| 1 | VIN | Main input supply pin (2.0–5.25 V); requires 1.0 µF ceramic decoupling capacitor placed adjacent to pin. |
| 2 | GND | Analog/digital ground reference; tied internally to EP; forms low-inductance return path for VIN and VOUT currents. |
| 3 | CE | Active-high chip enable; internal 0.6 µA pull-down ensures automatic shutdown if left unconnected. |
| 4 | VOUT | Regulated 1.2 V output; requires 1.0 µF ceramic output capacitor; supports fast load transient response (≤200 µs settling). |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated NMOS between VOUT and GND (RDS(ON) = 60 Ω) discharges output capacitor within milliseconds upon CE deactivation-prevents residual voltage hold-up in power sequencing. |
| Low-noise architecture | 10 µVRMS output noise achieved via optimized internal biasing and noise-reduction circuitry-critical for RF front-end and precision analog circuits. |
| High PSRR across frequency | 80 dB @ 1 kHz and 75 dB @ 10 kHz maintained across full load range (1–150 mA), enabling clean LDO output even with noisy DC/DC inputs. |
| Ultra-small footprint | 1.0 mm × 1.0 mm DFN package occupies 65% less board area than SOT-23-5-ideal for wearables, hearing aids, and miniaturized IoT sensors. |
| Precision output accuracy | ±1% initial tolerance and ±1.5% over temperature (−40°C to +85°C) eliminates need for post-production calibration in cost-sensitive consumer applications. |
Applications
| RF Module Power Supply | Portable MCU Core Rail |
|---|---|
|
Use Scenario: Powering 2.4 GHz BLE/Wi-Fi transceiver ICs in compact wireless earbuds where EMI-sensitive RF performance depends on ultra-low supply noise. IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering clean 1.2 V to RF synthesizer and baseband processor cores. Use Value: 10 µVRMS noise and 80 dB PSRR prevent AM-to-PM conversion and phase noise degradation in VCOs, preserving link budget and BER. |
Use Scenario: Supplying the core voltage of an ARM Cortex-M0+ microcontroller in a battery-powered smart sensor node operating from a single Li-ion cell. IC Role / Device Role / Timing Role: Fixed-output LDO providing regulated 1.2 V core rail with enable-controlled sleep/wake cycling. Use Value: 80 µA quiescent current and 200 mV dropout extend battery life by >15% versus higher-IQ alternatives; CE pin enables precise wake timing. |
| Industrial Sensor Signal Chain | Automotive Infotainment Audio Bias |
|
Use Scenario: Powering a 24-bit delta-sigma ADC and instrumentation amplifier in a factory-floor pressure sensor module exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Precision analog supply rail generator with tight output tolerance and low tempco (±100 ppm/°C). Use Value: ±1% output accuracy over −40°C to +85°C avoids gain drift errors; low noise prevents quantization floor elevation in high-resolution measurements. |
Use Scenario: Providing bias voltage to Class-D audio amplifier input stages in automotive head units where engine cranking induces severe input ripple. IC Role / Device Role / Timing Role: Ripple-suppressing LDO isolating analog audio circuitry from noisy 5 V vehicle bus. Use Value: 80 dB PSRR at 1 kHz attenuates crank-induced 100–200 Hz ripple by 100×, eliminating audible "thump" during ignition. |
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 | 100 mA max output, 6 µA IQ, no auto-discharge, SOT-23-3 package | Limited to ultra-low-power sensor nodes; lacks CE control and fast discharge for sequenced systems | Select when lowest possible quiescent current is critical and 100 mA load suffices; not suitable for RF or dynamic load applications. |
| Torex XC6210B122MR-G | 200 mA output, 15 µVRMS noise, no CE pin, same DFN1010 package | Requires external enable circuitry; higher noise limits use in sensitive RF sections | Choose for higher current needs where CE control is unnecessary and noise <15 µVRMS is acceptable. |
Compared with MCP1700T-1202E/TT and XC6210B122MR-G, the NCP4688DMU12TCG uniquely combines 150 mA drive, 10 µVRMS noise, active CE control, and integrated autodischarge in a 1.0 mm² footprint-making it the only option meeting all four requirements simultaneously for compact, sequenced, noise-sensitive designs.
Availability
NCP4688DMU12TCG is available at Aetrix Electronics and suitable for RF modules, portable MCU core rails, industrial sensor signal chains, and automotive infotainment audio bias requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP4688DMU12TCG 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 innovation for automotive, industrial, cloud, medical, and IoT applications.
The NCP4688DMU12TCG belongs to onsemi's precision low-noise LDO family, engineered specifically for noise-critical analog and RF subsystems in battery-powered and thermally constrained environments.
FAQ
What is the maximum input voltage rating for the NCP4688DMU12TCG?
The NCP4688DMU12TCG has an absolute maximum input voltage of 6 V per its datasheet (Table 2). Operation above 5.25 V violates recommended conditions and risks permanent damage. For reliable long-term use, keep VIN ≤ 5.25 V across all temperatures and load conditions.
Does the NCP4688DMU12TCG require external capacitors, and what values are recommended?
Yes-the NCP4688DMU12TCG requires both input (CIN) and output (COUT) ceramic capacitors. The datasheet specifies 1.0 µF for each, placed as close as possible to their respective pins. Larger values improve transient response but are not required for stability; tantalum capacitors are discouraged due to ESR-related instability risks.
How does the auto-discharge feature work in the NCP4688DMU12TCG?
When the CE pin is driven low, the NCP4688DMU12TCG activates an internal NMOS transistor (RDS(ON) ≈ 60 Ω) between VOUT and GND, discharging the output capacitor rapidly. This prevents residual voltage from holding up downstream circuitry during power-down sequences-critical for deterministic system reset behavior.
Is the exposed pad (EP) on the NCP4688DMU12TCG electrically connected, and how should it be handled?
Yes-the exposed pad on the NCP4688DMU12TCG is electrically connected to GND and serves as the primary thermal path. It must be soldered to a PCB copper pour tied to the system ground plane. Leaving it floating degrades thermal performance (RJA increases from 250°C/W to >300°C/W) and may cause overheating under 150 mA load.
Can the NCP4688DMU12TCG be used with a 1.8 V input supply?
No-the minimum recommended input voltage for the NCP4688DMU12TCG is 2.0 V (per Table 4). At 1.8 V, the device cannot maintain regulation due to insufficient headroom-dropout voltage is 200 mV at 150 mA, requiring ≥1.4 V input, but the internal reference and control circuitry require ≥2.0 V to operate correctly. Use only within 2.0–5.25 V range.
NCP4688DMU12TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- -
- Output Type:
- -
- Number of Regulators:
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- -
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
NCP4688DMU12TCG FAQ
1.How can I place an order for NCP4688DMU12TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4688DMU12TCG 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 NCP4688DMU12TCG reliable?
The price and inventory of NCP4688DMU12TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4688DMU12TCG is usually 5 days.
3.What payment methods are accepted for NCP4688DMU12TCG?
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NCP4688DMU12TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4688DMU12TCG 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 NCP4688DMU12TCG?
For technical support, including NCP4688DMU12TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4688DMU12TCG requirements.
6.How does Aetrix verify that NCP4688DMU12TCG is sourced from the original manufacturer or authorized distributors?
All NCP4688DMU12TCG 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 NCP4688DMU12TCG meets industry standards.
7.What is the process for return or replacement of NCP4688DMU12TCG?
All NCP4688DMU12TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP4688DMU12TCG, 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 NCP4688DMU12TCG part is unused and in its original packaging.
Return procedure for NCP4688DMU12TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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