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Texas Instruments MC33063AQDRQ1
- Part No.:
- MC33063AQDRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33063AQDRQ1.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:14,301
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Product details
Overview
MC33063AQDRQ1 from Texas Instruments is an AEC-Q100 qualified switching regulator IC supporting boost, buck, and inverting DC-DC topologies with 1.5A peak switch current, 3V–40V input range, and 1.25V ±2% internal reference. It integrates oscillator, PWM controller, Darlington output switch, and current-limit circuitry for automotive power conversion.
For engineers reviewing the MC33063AQDRQ1 datasheet, MC33063AQDRQ1 pinout, MC33063AQDRQ1 application, or MC33063AQDRQ1 equivalent, this page delivers verified technical context, validated pin functions, topology-specific design meaning, and automotive-grade alternative options with documented functional differences.
Technical Context
The MC33063AQDRQ1 implements a fixed-frequency (up to 100 kHz) current-mode PWM control architecture using an external timing capacitor and internal 1.25V reference. Its Darlington output switch delivers up to 1.5A peak current with VCE(sat) ≤1.3V at 1A, while active peak-current limiting triggers at 300mV sense voltage across RSC.
Operating from –40°C to +125°C, it features temperature-compensated reference stability, short-circuit protection via IPk sensing, and low standby current (≤4 mA). The oscillator uses asymmetric charge/discharge currents (35 μA/220 μA typical) to set duty cycle, enabling precise timing control across input voltage and temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 40V - supports wide automotive battery transients including cold-crank (≥3V) and load-dump (≤40V). |
| Output Switch Current | 1.5A peak - enables ≥500mA continuous output in buck configuration with margin for transient loads. |
| Oscillator Frequency | Up to 100kHz - sets practical inductor size (e.g., 170µH for 12V→28V boost) while minimizing EMI. |
| Reference Voltage | 1.25V ±2% - determines output accuracy in all topologies; used with external resistor divider for adjustable VOUT. |
| Current Limit Threshold | 300mV ±50mV - sets peak inductor current via external sense resistor (RSC = 0.3V/IPk). |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive environments per AEC-Q100 Grade 1. |
| ESD Rating | HBM ±2000V, CDM ±750V (corner pins) - meets automotive board-level ESD robustness requirements. |
Pinout & Package
MC33063AQDRQ1 is housed in an SOIC-8 (D package), 4.90mm × 3.91mm body, RoHS-compliant, with NIPDAU lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Switch Collector) | Output switch collector node | Connects to inductor/diode in boost; to input rail in buck; to ground in inverter - defines topology-dependent high-side switching node. |
| 2 (Switch Emitter) | Output switch emitter node | Serves as return path for switch current; tied to GND in buck, to inductor in boost/inverter - enables Darlington saturation control. |
| 3 (Timing Capacitor) | Oscillator timing node | External capacitor (CT) sets oscillator frequency and duty cycle; charge/discharge asymmetry enables precise tON/tOFF control. |
| 4 (GND) | Power and signal reference | Primary ground return for internal circuits and external components; must be low-impedance for stable regulation and noise immunity. |
| 5 (Comparator Inverting Input) | Feedback voltage input | Compares divided output voltage against 1.25V reference; error signal drives PWM to regulate VOUT across line/load changes. |
| 6 (VCC) | Main supply input | Accepts 3V–40V unregulated input; powers internal circuitry and charges timing capacitor - requires local ceramic decoupling. |
| 7 (Ipk) | Peak current sense input | Monitors voltage drop across external RSC; triggers current limit when ≥300mV - protects switch and inductor during overload/short. |
| 8 (Driver Collector) | Internal driver output | Drives external PNP transistor in high-current configurations; enables >1.5A peak output via external switch augmentation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualification | Grade 1 (–40°C to +125°C), HBM Class 2, CDM Class C4B - certified for automotive power systems without derating. |
| Integrated Darlington switch | 1.5A peak / 1.3V VCE(sat) at 1A - eliminates need for external high-current transistor in mid-power applications. |
| Adjustable output topology | Single IC supports boost, buck, and inverting converters via reconfigured external components - reduces BOM count and design time. |
| Active current limiting | 300mV threshold with fast response - prevents thermal runaway during startup, overload, or short-circuit conditions. |
| Low standby current | ≤4 mA at full input range - minimizes quiescent drain on vehicle battery during sleep mode. |
Applications
| Automotive Body Control Module (BCM) | Automotive Infotainment Power Supply |
|---|---|
Use Scenario: Generating stable 5V/3.3V rails from 12V battery for microcontrollers, CAN transceivers, and display drivers in door modules and lighting controllers. IC Role / Device Role / Timing Role: Primary DC-DC controller implementing buck topology with integrated switch and current limit. Use Value: Eliminates need for external MOSFET and gate driver; withstands automotive transients (7V–40V) without auxiliary protection circuitry. |
Use Scenario: Providing isolated ±12V rails for audio amplifiers and analog front-ends in head units using inverting topology. IC Role / Device Role / Timing Role: Inverting regulator IC with precision 1.25V reference and oscillator-controlled duty cycle. Use Value: Achieves clean negative output with <500mVPP ripple at 100mA; reference tolerance ensures consistent biasing across temperature. |
| Automotive ADAS Camera Power | Automotive Telematics GPS Module |
Use Scenario: Stepping up 12V battery to 28V for image sensor bias in rear-view and surround-view cameras. IC Role / Device Role / Timing Role: Boost converter controller with 1.5A switch enabling compact inductor selection (170µH). Use Value: Delivers 175mA at 28V with 87.7% efficiency and <40mVPP ripple (with filter); thermal performance validated to 125°C ambient. |
Use Scenario: Regulating 12V battery to 3.3V for GPS/GNSS receivers and cellular modems requiring low-noise, always-on supply. IC Role / Device Role / Timing Role: Buck regulator with low standby current (<4 mA) and tight line regulation (±12mV over 15V–25V). Use Value: Maintains GPS lock during engine cranking (≥3V input); integrated current limit prevents modem brownout during RF transmit bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2574MX-5.0/NOPB | Fixed 5V output, 0.5A switch, no IPk sense pin - lacks adjustable current limit and topology flexibility. | Only suitable for fixed-output buck; cannot implement boost/inverter or adjust current limit threshold. | Select when only 5V buck is needed and lower cost outweighs design flexibility. |
| TPS54202DRCT | 2A synchronous buck, 4.5V–28V input, integrated FETs, 500kHz operation - higher efficiency but narrower input range and no inverting capability. | Requires external components for boost/inverter; not AEC-Q100 qualified - limited to non-safety-critical infotainment subsystems. | Select for higher-efficiency 12V→3.3V conversion where automotive qualification is not required. |
Compared with LM2574MX-5.0/NOPB and TPS54202DRCT, MC33063AQDRQ1 uniquely combines AEC-Q100 qualification, 3V–40V input, 1.5A switch, and triple-topology support - making it the only option for ruggedized, multi-rail automotive power designs requiring single-IC versatility.
Availability
MC33063AQDRQ1 is available at Aetrix Electronics and suitable for automotive body electronics, infotainment power supplies, and ADAS camera biasing requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MC33063AQDRQ1 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive-grade power management solutions.
The MC33063AQDRQ1 belongs to TI's automotive-qualified DC-DC controller product line, designed specifically for robust, cost-effective power conversion in harsh-temperature vehicle subsystems without external high-current switches.
FAQ
What topologies does the MC33063AQDRQ1 support?
The MC33063AQDRQ1 supports boost, buck, and inverting DC-DC converter topologies using the same IC and minimal external components. Its Darlington output switch, adjustable current limit, and 1.25V reference enable reconfiguration across all three modes - confirmed in TI's SLLS654E datasheet Figures 7-1 through 7-9. No additional controller IC is required for topology change.
Is the MC33063AQDRQ1 qualified for automotive use?
Yes, the MC33063AQDRQ1 is AEC-Q100 qualified (Grade 1, –40°C to +125°C), with documented HBM ±2000V and CDM ±750V ESD ratings. It is explicitly intended for automotive applications including body control, infotainment, and ADAS subsystems, as stated in Section 1 Features and Section 2 Applications of the official datasheet.
What is the maximum output current achievable with the MC33063AQDRQ1?
The MC33063AQDRQ1 provides a 1.5A peak switch current. Continuous output current depends on topology and thermal design: up to ~500mA in buck (e.g., 25V→5V @ 83.7% efficiency), ~175mA in boost (12V→28V @ 87.7%), and ~100mA in inverting (5V→–12V @ 62.2%). Derating is required above 85°C ambient per thermal data in Section 5.4.
How is output voltage adjusted on the MC33063AQDRQ1?
Output voltage is adjusted using an external resistor divider connected between VOUT, the COMP pin (Pin 5), and GND. The internal 1.25V reference compares against the divided voltage, so VOUT = 1.25V × (1 + R2/R1) for buck/boost or VOUT = –1.25V × (1 + R2/R1) for inverting topology - as shown in Figures 6-1, 7-1, 7-4, and 7-7 of the datasheet.
Does the MC33063AQDRQ1 include built-in current limiting?
Yes, the MC33063AQDRQ1 features active peak-current limiting via the IPk pin (Pin 7). When voltage across the external sense resistor exceeds 300mV (typical), the IC rapidly charges the timing capacitor to terminate the switch ON-time - preventing inductor saturation and thermal failure. This function is detailed in Section 6.3.2 and Figure 6-2.
MC33063AQDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck, Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 40V (Switch)
- Current - Output:
- 1.5A (Switch)
- Frequency - Switching:
- 100kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MC33063AQDRQ1 FAQ
1.How can I place an order for MC33063AQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33063AQDRQ1 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 MC33063AQDRQ1 reliable?
The price and inventory of MC33063AQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33063AQDRQ1 is usually 5 days.
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MC33063AQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33063AQDRQ1 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 MC33063AQDRQ1?
For technical support, including MC33063AQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33063AQDRQ1 requirements.
6.How does Aetrix verify that MC33063AQDRQ1 is sourced from the original manufacturer or authorized distributors?
All MC33063AQDRQ1 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 MC33063AQDRQ1 meets industry standards.
7.What is the process for return or replacement of MC33063AQDRQ1?
All MC33063AQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with MC33063AQDRQ1, 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 MC33063AQDRQ1 part is unused and in its original packaging.
Return procedure for MC33063AQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC33063AQDRQ1 Tags
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