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onsemi NCV8537MLADJR2G
- Part No.:
- NCV8537MLADJR2G
- Manufacturer:
- onsemi
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
NCV8537MLADJR2G.pdf
- Description:
- IC REG LIN POS ADJ 500MA 10DFNW
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
NCV8537MLADJR2G from onsemi is an automotive-grade, adjustable-output low-dropout linear regulator with Power Good monitoring, ±0.9% output accuracy at 25 °C, 340 mV typical dropout at 500 mA (3.3 V output), and operation across −40 °C to +125 °C. It delivers up to 500 mA, features reverse bias protection, thermal shutdown, and low-noise performance (33 µVRMS with CNR), targeting power rails in navigation systems and audio subsystems.
For engineers reviewing the NCV8537MLADJR2G datasheet, pinout, applications, or equivalent options, this page provides verified technical context, validated pin functions, confirmed automotive qualification (AEC-Q100), real-world stability behavior with low-ESR capacitors, and direct alternative part comparisons for system-level design and sourcing decisions.
Technical Context
The NCV8537MLADJR2G implements a precision bandgap reference and error amplifier driving a series pass element with integrated reverse bias protection. Its adjustable architecture uses the SENSE/ADJ pin to set output voltage via external resistor divider (1.25 V to 10 V range), enabling flexible rail generation without internal feedback resistors.
Power Good (PWRG) logic monitors regulated output against 93–99% of VOUT thresholds with 50 µs blanking time and open-drain output requiring external pull-up. Shutdown (SD) enables low-quiescent operation (<1 mA), while NR pin supports optional noise reduction via 10 nF capacitor to ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 500 mA continuous - supports mid-power microcontrollers and analog signal chains without external heat sinking under typical PCB copper area. |
| Dropout Voltage | 340 mV typ at 500 mA (3.3 V output) - enables regulation from 3.7 V input, critical for battery-powered automotive systems near end-of-discharge. |
| Output Accuracy | ±0.9% at 25 °C, ±1.5% over −40 °C to +125 °C - ensures stable voltage for sensitive ADC references and PLLs without calibration. |
| Noise Performance | 33 µVRMS (10 Hz–100 kHz, with 10 nF CNR) - meets low-noise requirements for audio DACs and RF front-end biasing. |
| Operating Temp | −40 °C to +125 °C junction - qualified per AEC-Q100 Grade 1, suitable for under-hood and infotainment module deployment. |
| Input Voltage Range | 2.9 V to 12 V - compatible with 12 V automotive battery systems including cold-crank (down to ~6 V) and load-dump transients (with external protection). |
| Power Good Threshold | 93–99% of VOUT with hysteresis - provides reliable supply monitoring for microcontroller reset sequencing and fault logging. |
Pinout & Package
NCV8537MLADJR2G is packaged in a 10-pin DFNW10 (3×3 mm, 0.5 mm pitch) with wettable flank and exposed thermal pad (EPAD) connected to GND for enhanced thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | Vout | Regulated output - must be bypassed with ≥1.0 µF capacitor; pins are paralleled for current sharing and reduced trace inductance. |
| 3 | SENSE / ADJ | Adjustable feedback node - connects to resistor divider to set output voltage (1.25 V reference); no connection needed for fixed versions. |
| 4 | GND | Power ground - tied internally to EPAD; requires low-impedance PCB plane connection for thermal and noise performance. |
| 5 | PWRG | Open-drain Power Good output - sinks current when VOUT drops below threshold; requires external 100 kΩ pull-up to VIN. |
| 6 | NC | No connect - electrically isolated; must remain unconnected per datasheet to avoid malfunction. |
| 7 | NR | Noise reduction - connects to 10 nF capacitor to GND to reduce output noise by ~30%; left floating if noise margin is sufficient. |
| 8 | SD | Active-low shutdown - drives regulator into <1 mA quiescent state when pulled ≤0.4 V; tie to VIN if unused. |
| 9, 10 | Vin | Input supply - accepts 2.9–12 V; pins are paralleled to minimize input impedance and improve transient response. |
| EPAD | GND | Exposed thermal pad - must be soldered to large GND copper area for thermal resistance reduction (JθJA = 18 °C/W typical). |
Key Features
| Feature | Design Value |
|---|---|
| Stable with any capacitor type ≥1.0 µF | Eliminates ESR constraints - enables use of low-ESR ceramic, polymer, or tantalum caps without oscillation risk. |
| Reverse bias protection (≤7 V differential) | Prevents destructive backfeed current when VIN = 0 V and VOUT is held high by bulk capacitance or external source. |
| Thermal shutdown with 10 °C hysteresis | Protects against sustained overload or poor heatsinking; auto-recovery after cooldown avoids latching faults. |
| Low shutdown current (<1 mA) | Enables battery-backed systems to maintain >1-year shelf life without significant drain during storage or sleep modes. |
| AEC-Q100 qualified (Grade 1) | Validated for automotive applications including temperature cycling, vibration, and long-term reliability testing per industry standard. |
Applications
| Automotive Navigation Systems | Infotainment Audio Subsystems |
|---|---|
Use Scenario: Powering GPS baseband processors and RF front-ends in head-unit navigation modules operating across vehicle battery voltage swings and ambient temperatures. IC Role / Device Role / Timing Role: Primary 3.3 V or 5.0 V LDO supplying clean, stable voltage to sensitive mixed-signal ICs with Power Good signaling for safe boot sequencing. Use Value: ±1.5% accuracy over −40 °C to +125 °C and 340 mV dropout ensure uninterrupted operation during cold cranking and thermal stress. |
Use Scenario: Biasing Class-D amplifier controllers and high-resolution audio DACs in premium car audio systems where ripple and noise directly impact SNR. IC Role / Device Role / Timing Role: Low-noise post-regulator delivering ultra-stable 1.8 V or 2.5 V rails with optional CNR filtering to meet <100 µVRMS noise budgets. Use Value: 33 µVRMS noise (with CNR) and reverse bias protection prevent pop/click artifacts and protect against speaker coil-induced back-EMF. |
| Satellite Radio Receivers | DSL/Cable Modem Power Management |
Use Scenario: Regulating power for low-noise LNAs and digital demodulators in satellite radio tuners mounted in vehicle roof modules with limited airflow. IC Role / Device Role / Timing Role: Adjustable-output LDO configured for 1.25–10 V range, supporting multiple IC voltage requirements from single input source. Use Value: DFNW10 package with wettable flank enables automated optical inspection (AOI) and robust solder joint reliability in high-vibration environments. |
Use Scenario: Providing tightly regulated auxiliary rails (e.g., 2.5 V for PHY interfaces, 3.3 V for microcontrollers) in broadband modems deployed in residential environments. IC Role / Device Role / Timing Role: High-accuracy, low-dropout regulator with Power Good output used for system health monitoring and graceful shutdown during brownout events. Use Value: 0.04 mV/mA load regulation and 93–99% PWRG threshold enable precise voltage supervision without external comparators or dividers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV8535MLADJR2G | Same family, lacks Power Good output; otherwise identical pinout, accuracy (±0.9%), and thermal specs. | Not suitable where supply monitoring or reset sequencing is required; lower BOM cost where PWRG is unused. | Select only if Power Good functionality is omitted from system architecture and cost sensitivity outweighs future testability needs. |
| TLV73333PDBVR | 3.3 V fixed output only; 300 mA rating; ±1% accuracy; no reverse bias protection; smaller 5-pin SOT-23 package. | Applicable for space-constrained non-automotive designs with fixed 3.3 V requirement and no need for automotive qualification. | Choose for consumer-grade, low-current applications where footprint and cost dominate; not drop-in due to pin count, output adjustability, and qualification mismatch. |
Compared with NCV8537MLADJR2G, NCV8535MLADJR2G removes Power Good but retains full automotive qualification and adjustability, while TLV73333PDBVR trades current capability, protection features, and AEC-Q100 compliance for size and cost in non-automotive contexts.
Availability
NCV8537MLADJR2G is available at Aetrix Electronics and suitable for automotive navigation systems, infotainment audio subsystems, and satellite radio receivers requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for NCV8537MLADJR2G 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 focused on energy-efficient technologies for automotive, industrial, cloud, medical, and IoT applications, with leadership in power management and analog solutions.
The NCV8537MLADJR2G belongs to onsemi's automotive-qualified linear regulator product line, designed specifically for demanding vehicle subsystems requiring high accuracy, low noise, and robust fault protection under wide temperature and voltage conditions.
FAQ
What is the maximum input voltage rating for the NCV8537MLADJR2G?
The NCV8537MLADJR2G has an absolute maximum input voltage rating of +16 V, as specified in the Maximum Ratings table. However, for guaranteed operation and optimal dropout performance, the recommended input range is 2.9 V to 12 V. Operation above 12 V may increase power dissipation and thermal stress without functional benefit, and should be avoided unless transient surge protection is implemented externally.
Does the NCV8537MLADJR2G require a minimum load current to maintain regulation stability?
No, the NCV8537MLADJR2G does not require a minimum load current for stability. The datasheet explicitly states "stable output with low value capacitors of any type and with no minimum load current requirement." This allows the device to remain well-regulated even during deep sleep or standby modes where output current drops to near zero, simplifying power sequencing in low-power automotive ECUs.
How is the output voltage set for the NCV8537MLADJR2G in adjustable mode?
The NCV8537MLADJR2G uses its SENSE/ADJ pin to configure output voltage via an external resistor divider referenced to the internal 1.25 V bandgap. The formula is VOUT = 1.25 × (1 + R3/R2), where R2 connects between ADJ and GND, and R3 connects between VOUT and ADJ. Recommended divider current is 10–100 µA, achieved using kΩ-range resistors to minimize error from ADJ pin bias current.
What is the purpose of the NR pin on the NCV8537MLADJR2G, and how should it be used?
The NR (Noise Reduction) pin on the NCV8537MLADJR2G reduces output voltage noise by providing a dedicated path to shunt high-frequency noise to ground. Connecting a 10 nF capacitor between NR and GND lowers RMS noise from 52 µV to 33 µV (10 Hz–100 kHz). If low-noise performance is not required, the NR pin may be left unconnected - it has no effect on basic regulation or stability.
Is the NCV8537MLADJR2G pin-compatible with other variants in the NCV8537 family?
Yes, the NCV8537MLADJR2G shares identical pinout and package (DFNW10) with all fixed-output variants (e.g., NCV8537ML330R2G) and the NCV8537MNADJR2G (DFN10 variant). Pin functions - including Vout (pins 1–2), SENSE/ADJ (pin 3), GND (pin 4), PWRG (pin 5), NC (pin 6), NR (pin 7), SD (pin 8), and Vin (pins 9–10) - are fully consistent across the family, enabling layout reuse across voltage options.
NCV8537MLADJR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 10V
- Voltage Dropout (Max):
- 0.34V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 220 µA
- Current - Supply (Max):
- 14 mA
- PSRR:
- -
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 10-DFNW (3x3)
NCV8537MLADJR2G FAQ
1.How can I place an order for NCV8537MLADJR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8537MLADJR2G 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 NCV8537MLADJR2G reliable?
The price and inventory of NCV8537MLADJR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8537MLADJR2G is usually 5 days.
3.What payment methods are accepted for NCV8537MLADJR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8537MLADJR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8537MLADJR2G?
NCV8537MLADJR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8537MLADJR2G 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 NCV8537MLADJR2G?
For technical support, including NCV8537MLADJR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8537MLADJR2G requirements.
6.How does Aetrix verify that NCV8537MLADJR2G is sourced from the original manufacturer or authorized distributors?
All NCV8537MLADJR2G 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 NCV8537MLADJR2G meets industry standards.
7.What is the process for return or replacement of NCV8537MLADJR2G?
All NCV8537MLADJR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8537MLADJR2G, 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 NCV8537MLADJR2G part is unused and in its original packaging.
Return procedure for NCV8537MLADJR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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