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onsemi NCV5173EDR2G
- Part No.:
- NCV5173EDR2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
NCV5173EDR2G.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
NCV5173EDR2G from onsemi is an automotive-grade, current-mode PWM boost controller IC with integrated 1.5 A NPN power switch, 560 kHz nominal switching frequency, 2.7 V to 30 V input range, and 1.276 V precision feedback reference-designed for compact, high-efficiency DC-DC conversion in vehicle infotainment power rails.
For engineers reviewing the NCV5173EDR2G datasheet, pinout, applications, or equivalent options, key selection considerations include its AEC-Q100 qualification, thermal shutdown with hysteresis, frequency foldback under overcurrent, external synchronization capability, and compatibility with boost, flyback, SEPIC, and inverting topologies.
Technical Context
The NCV5173EDR2G implements a fixed-frequency current-mode control architecture with internal slope compensation to suppress subharmonic oscillation above 50% duty cycle. Its error amplifier delivers 550 μS typical transconductance and clamps VC between 0.5 V and 1.7 V for loop compensation and current limit setting.
It features dual-frequency operation: 560 kHz nominal (FB = 1 V) and 104 kHz reduced mode (FB = 0 V), triggered by FB voltage dropping below 0.4 V-enabling robust startup and overload protection. The SS pin supports TTL-level sync up to 1000 kHz and logic-low shutdown with ≤60 μA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Current Limit | 1.5 A guaranteed minimum-ensures reliable peak current handling without external sensing in most boost designs. |
| Switching Frequency | 560 kHz nominal (±20%)-enables use of small inductors & capacitors for space-constrained automotive modules. |
| Input Voltage Range | 2.7 V to 30 V-supports cold-crank (≥2.45 V min) and load-dump (≤35 V abs max) conditions in 12 V vehicle systems. |
| Feedback Reference | 1.276 V ±2.7%-provides stable output regulation accuracy across −40°C to +125°C junction temperature. |
| Thermal Shutdown | 180°C trip with 25°C hysteresis-prevents latch-up during sustained overload while allowing recovery without power cycling. |
| Shutdown Current | ≤60 μA at VCC ≤30 V-minimizes battery drain in always-on vehicle subsystems like telematics or CAN gateways. |
| Max Duty Cycle | 90% typical-enables high step-up ratios (e.g., 5 V out from 3.3 V input) without requiring external duty-cycle limiting. |
Pinout & Package
NCV5173EDR2G is housed in an SOIC-8 (Case 751) Pb-free package with exposed thermal pad (not electrically connected), rated for 165°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VC | Loop compensation & current limit control | Output of transconductance error amplifier; clamped 0.5–1.7 V; RC network here sets bandwidth and stability. |
| 2 - FB | Positive feedback input | Senses regulated output via resistor divider; 1.276 V reference enables precise voltage setting (e.g., 5 V = R1/R2 = 2.92). |
| 3 - Test | Internal test node | Must be left floating or grounded; applying 2–6 V disables oscillator and forces switch-on-used only for factory testing. |
| 4 - SS | Sync input / shutdown control | TTL-compatible; low = shutdown (≤60 μA); rising edge synchronizes to external clock up to 1000 kHz. |
| 5 - VCC | Main power supply input | Accepts 2.7–30 V; requires local 1–10 μF ceramic bypass to AGND for noise immunity and startup reliability. |
| 6 - AGND | Analog ground reference | Low-noise return for FB, VC, and internal references; must be separated from PGND to avoid switching noise coupling. |
| 7 - PGND | Power switch emitter return | High-current path for 1.5 A switch; connects to PCB ground plane directly beneath IC for minimal EMI and thermal resistance. |
| 8 - VSW | Switch collector terminal | Drives external inductor/diode; withstands 40 V max; trace must be short and wide to reduce ringing and radiated emissions. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to +125°C TJ) with PPAP support-meets OEM requirements for infotainment, ADAS sensors, and body control modules. |
| Frequency foldback | Reduces switching frequency to ~104 kHz when FB < 0.4 V-limits peak inductor current and thermal stress during short-circuit or startup overload. |
| Integrated slope compensation | 180 mA/s internal ramp added to current sense signal-eliminates need for external compensation in most boost/flyback designs. |
| Pin-to-pin compatibility | Direct replacement for LT1373 in existing layouts-enables drop-in upgrade to AEC-Q100-compliant solution without PCB revision. |
| Soft-start via VC clamp | External RC on VC pin controls rise time of error amplifier output-prevents output overshoot and inrush current during power-up. |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
Use Scenario: Generating stable 5 V or 12 V rail from vehicle battery (6–16 V) for LCD displays, audio DSPs, and USB hubs. IC Role / Device Role / Timing Role: Primary boost controller managing power sequencing, overvoltage/overcurrent protection, and EMI-optimized switching. Use Value: 560 kHz operation allows <10 μH inductors and 22 μF ceramic output caps-reducing board area by >40% vs. 280 kHz alternatives. | Use Scenario: Powering 3.3 V image sensor and 1.8 V ISP in rear-view or surround-view camera systems exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Regulated DC-DC converter with thermal hysteresis and cold-crank support ensuring uninterrupted operation during cranking transients. Use Value: −40°C to +125°C operation and 2.45 V minimum start-up voltage guarantee boot-up even after extended parking in winter climates. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) |
Use Scenario: Providing always-on 3.3 V supply for LTE modem, GNSS receiver, and CAN transceivers in connected vehicle gateways. IC Role / Device Role / Timing Role: Low-quiescent-current boost regulator enabling <60 μA shutdown mode to meet ISO 16750-2 battery drain limits. Use Value: Sync capability allows alignment with main system clock-reducing beat-frequency EMI in multi-rail power architectures. | Use Scenario: Driving LED lighting strings (e.g., interior map lights, ambient lighting) from 12 V battery with dimming control via FB voltage modulation. IC Role / Device Role / Timing Role: Constant-current source configured via adjustable FB divider and current-sense resistor on VC pin. Use Value: Programmable current limit (down to <1 A via VC clamp) enables precise LED brightness control without external current regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1373CS8#PBF | Same pinout, 500 kHz base frequency, no AEC-Q100 qualification, higher 100 μA shutdown current | Industrial/commercial only; unsuitable for automotive production due to missing PPAP and temperature rating | Select only for prototyping or non-automotive use where qualification is not required. |
| TPS61088RHLR | 5.5 V max input, 2.7 A switch, 1 MHz switching, no sync/shutdown pins, different package (WQFN-16) | Higher efficiency at low input voltages but incompatible with 24 V systems or legacy LT1373 layouts | Choose when >2 A output current or ultra-small solution size is prioritized over automotive compliance. |
Compared with LT1373CS8#PBF and TPS61088RHLR, the NCV5173EDR2G uniquely combines AEC-Q100 Grade 1 operation, 30 V input tolerance, pin compatibility with legacy designs, and integrated fault management-making it the only qualified option for volume automotive deployment.
Availability
NCV5173EDR2G is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, telematics control units, and body control modules requiring stable component supply across extended temperature and lifecycle demands.
Supply support for NCV5173EDR2G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV5173EDR2G belongs to onsemi's automotive analog power portfolio, engineered specifically for robust, high-reliability DC-DC conversion in harsh vehicle environments-from engine bays to dashboard displays.
FAQ
What is the maximum input voltage the NCV5173EDR2G can withstand?
The NCV5173EDR2G has an absolute maximum VCC rating of 35 V and a recommended operating range of 2.7 V to 30 V. Its VSW pin tolerates up to 40 V, supporting transient conditions such as ISO 7637-2 pulse 1 (load dump). Exceeding 35 V on VCC may cause permanent damage, as confirmed in the Absolute Maximum Ratings table on page 2 of the datasheet.
Does the NCV5173EDR2G support external frequency synchronization?
Yes, the NCV5173EDR2G supports external synchronization via its SS pin. A TTL-compatible rising edge can synchronize operation up to 1000 kHz-approximately 1.8× its nominal 560 kHz frequency. This feature is validated in the Electrical Characteristics table (page 3) and Application Information section (page 9), enabling EMI reduction in multi-converter systems.
How does the NCV5173EDR2G handle overcurrent or short-circuit conditions?
The NCV5173EDR2G responds to overcurrent via frequency foldback-reducing switching frequency from 560 kHz to ~104 kHz when FB falls below 0.4 V-and built-in thermal shutdown at 180°C with 25°C hysteresis. These protections are documented in the Features list (page 1) and Electrical Characteristics (page 4), preventing component stress without requiring external circuitry.
Can the NCV5173EDR2G be used in flyback topology?
Yes, the NCV5173EDR2G is explicitly qualified for flyback operation per the datasheet's opening statement (page 1) and Applications Information section (page 9). Its current-mode control, slope compensation, and 40 V VSW rating support isolated flyback designs-though transformer turns ratio and VSW clamping must be calculated per equations in the "VSW Voltage Limit" subsection (page 11).
What is the purpose of the Test pin on the NCV5173EDR2G?
The Test pin (Pin 3) connects to internal factory test logic and must be left floating or tied to AGND in end applications. Applying 2–6 V to this pin disables the oscillator and forces the power switch ON-behavior reserved for production testing and not intended for functional use. This requirement is specified in the Package Pin Description (page 4) and must be observed to ensure normal operation of the NCV5173EDR2G.
NCV5173EDR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Down, Step-Up/Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck, Boost, Flyback, Forward Converter, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 1.276V
- Voltage - Output (Max):
- 27V
- Current - Output:
- 1.5A (Switch)
- Frequency - Switching:
- 560kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
NCV5173EDR2G FAQ
1.How can I place an order for NCV5173EDR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV5173EDR2G 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 NCV5173EDR2G reliable?
The price and inventory of NCV5173EDR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV5173EDR2G is usually 5 days.
3.What payment methods are accepted for NCV5173EDR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV5173EDR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV5173EDR2G?
NCV5173EDR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV5173EDR2G 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 NCV5173EDR2G?
For technical support, including NCV5173EDR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV5173EDR2G requirements.
6.How does Aetrix verify that NCV5173EDR2G is sourced from the original manufacturer or authorized distributors?
All NCV5173EDR2G 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 NCV5173EDR2G meets industry standards.
7.What is the process for return or replacement of NCV5173EDR2G?
All NCV5173EDR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV5173EDR2G, 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 NCV5173EDR2G part is unused and in its original packaging.
Return procedure for NCV5173EDR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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