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Texas Instruments MC33063AP-P2
- Part No.:
- MC33063AP-P2
- Manufacturer:
- Texas Instruments
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MC33063AP-P2.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,874
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Product details
Overview
MC33063AP-P2 from Texas Instruments is a monolithic DC-DC switching regulator controller IC designed for boost, buck, and inverting topologies. It integrates a 1.25-V precision reference (±2%), comparator, oscillator, PWM controller with active current limiting, driver, and 1.5-A high-current output switch. It operates from 3 V to 40 V input and supports –40°C to 85°C industrial temperature range - used in portable blood gas analyzers, HMIs, and telecom power supplies.
For engineers reviewing the MC33063AP-P2 datasheet, MC33063AP-P2 pinout, MC33063AP-P2 application, or MC33063AP-P2 equivalent, key selection considerations include its adjustable output voltage capability, internal current-limit sense threshold of 300 mV, oscillator frequency up to 100 kHz, Darlington/non-Darlington switch configuration flexibility, and PDIP-8 package compatibility with legacy through-hole designs.
Technical Context
The MC33063AP-P2 implements a fixed-frequency current-mode control architecture using an internal oscillator whose timing is set by an external capacitor (CT) and charge/discharge currents (24–42 μA / 140–260 μA). Its PWM controller compares feedback from a resistor divider against the 1.25-V reference and modulates switch duty cycle via current limiting at the IPk pin.
It features dual switch configurations: Darlington-connected (pins 1 and 8 tied) yields 1.3-V saturation voltage at 1 A; non-Darlington (pin 8 driven separately) achieves 0.7-V saturation but requires forced β ≥10 to avoid saturation delay. The device supports three standard topologies without external gate drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 40 V - enables direct use with 5 V, 12 V, 24 V, and 36 V industrial rails without pre-regulation. |
| Switch Current Rating | 1.5 A peak - supports up to ~100 mA output in inverting mode or ~500 mA in buck mode with proper external components. |
| Reference Voltage | 1.25 V ±2% - sets output voltage accuracy in all configurations via R1/R2 feedback divider. |
| Oscillator Frequency | Up to 100 kHz - allows CT capacitor selection (e.g., 1 nF → 33 kHz typical) to balance efficiency vs. size. |
| Current Limit Threshold | 300 mV typical at IPk pin - provides precise overcurrent protection independent of supply voltage. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive under-hood auxiliary power applications. |
| Supply Current | 4 mA max - ensures low quiescent power in battery-backed systems during standby. |
Pinout & Package
MC33063AP-P2 is supplied in an 8-pin PDIP (Plastic Dual In-line Package) with 9.81 mm × 6.35 mm body size and through-hole mounting. Pin 4 is GND; pins 1 and 8 are collector/emitter terminals of the internal NPN switch; pin 7 is current-sense input; pin 5 is comparator inverting input for feedback.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Switch Collector) | High-current NPN collector | Connects to inductor/diode node in boost/inverting; ties to VIN in buck; must handle 1.5-A peak current. |
| 2 (Switch Emitter) | NPN emitter output | Return path for switch current; connects to GND in buck, to inductor in boost/inverting. |
| 3 (Timing Capacitor) | Oscillator timing node | External capacitor (CT) sets switching frequency; value directly scales fosc inversely. |
| 4 (GND) | Power and signal ground | Common reference for internal circuits, feedback network, and external components; pin 4 is thermally bonded. |
| 5 (Comparator Inverting Input) | Feedback voltage input | Accepts resistor-divider voltage from output; comparison against 1.25 V sets regulation point. |
| 6 (VCC) | Logic supply input | Connected to input rail (VIN); powers internal circuitry; must be decoupled with ≥1000 µF capacitor. |
| 7 (Ipk Sense) | Current limit detection | Monitors voltage across external sense resistor; 300-mV threshold triggers foldback current limiting. |
| 8 (Driver Collector) | Driver transistor collector | Enables non-Darlington switch configuration when used as external drive node; requires external base resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.5-A switch | Eliminates need for external MOSFET or BJT in low-to-medium power converters (<10 W), reducing BOM count and layout area. |
| Adjustable output voltage | Supported across all topologies via two-resistor feedback network referenced to 1.25-V internal bandgap. |
| Short-circuit current limiting | Hardware-based foldback protection triggered at 300 mV on IPk pin - prevents thermal runaway during output faults. |
| Low standby current | 4 mA max ICC enables >100-hour operation from 9-V alkaline batteries in portable instrumentation. |
| Multi-topology support | Single IC supports boost, buck, and inverting configurations with only changes to external passive component placement. |
Applications
| Blood Gas Analyzers | Human Machine Interfaces (HMIs) |
|---|---|
Use Scenario: Portable medical analyzer requiring isolated negative rail for sensor biasing and analog front-end. IC Role / Device Role / Timing Role: MC33063AP-P2 configured as inverting regulator generating –12 V @ 100 mA from 4.5–6 V battery input. Use Value: Achieves 62.2% efficiency and 500 mVPP ripple without external FET, meeting IEC 60601-1 leakage and portability constraints. | Use Scenario: Industrial touchscreen panel needing stable 5 V and –5 V rails from 24 V DC bus for LCD bias and op-amp references. IC Role / Device Role / Timing Role: MC33063AP-P2 used in buck topology for +5 V and inverting topology for –5 V, sharing timing capacitor. Use Value: Enables dual-rail generation with <1% load regulation and 40 mVPP filtered ripple, supporting noise-sensitive touch sensing. |
| Telecommunications Equipment | Test & Measurement Instruments |
Use Scenario: DSL line card requiring +28 V @ 175 mA for line driver amplifiers from 12 V backplane supply. IC Role / Device Role / Timing Role: MC33063AP-P2 configured as step-up converter with 170 µH inductor and 1N5819 diode. Use Value: Delivers 87.7% efficiency and 40 mVPP ripple with optional LC filter, meeting GR-1089 immunity requirements. | Use Scenario: Bench multimeter needing regulated ±15 V analog rails from unregulated 25 V input for ADC reference and op-amp stages. IC Role / Device Role / Timing Role: MC33063AP-P2 deployed in buck mode for +15 V and inverting mode for –15 V, each with independent feedback. Use Value: Provides 83.7% efficiency and 40 mVPP ripple per rail, enabling <0.01% measurement linearity over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34063AP | Same architecture but rated for 0°C to 70°C; 2% reference tolerance; identical pinout and electrical specs except temp range. | Not suitable for extended industrial environments below 0°C or above 70°C where MC33063AP-P2 is specified. | Select MC34063AP only for commercial-grade applications with ambient ≤70°C and ≥0°C. |
| LM2574N-5.0 | Fixed 5-V output, 0.5-A switch, 52-kHz fixed frequency, no external timing cap needed; different pinout and topology support. | Lacks adjustable output and multi-topology flexibility; limited to buck-only operation with lower current capability. | Choose LM2574N-5.0 only when fixed 5-V buck conversion suffices and board space permits SO-8 footprint change. |
Compared with MC34063AP and LM2574N-5.0, MC33063AP-P2 offers wider temperature range and full topology flexibility at the cost of higher design effort; MC34063AP trades temp range for identical ease-of-use, while LM2574N-5.0 sacrifices adjustability for integration and simplicity.
Availability
MC33063AP-P2 is available at Aetrix Electronics and suitable for blood gas analyzers, HMIs, telecommunications equipment, test & measurement instruments, and portable devices requiring stable component supply across extended temperature ranges.
Supply support for MC33063AP-P2 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 company delivering analog and embedded processing solutions, with leadership in power management ICs and industrial-grade reliability.
The MC33063A product line was designed for cost-sensitive, medium-power DC-DC conversion in industrial, medical, and telecom equipment where discrete-component simplicity and wide input range are critical.
FAQ
What is the maximum switching frequency achievable with MC33063AP-P2?
The MC33063AP-P2 oscillator supports frequencies up to 100 kHz, determined by the external timing capacitor (CT) and internal charge/discharge currents. With CT = 470 pF, typical fosc reaches 100 kHz; larger capacitors reduce frequency linearly - e.g., 1 nF yields ~33 kHz. Frequency stability is maintained across –40°C to 85°C.
Can MC33063AP-P2 be used in a buck-boost configuration?
No, MC33063AP-P2 does not support true buck-boost topology. It is explicitly designed for boost, buck, and inverting configurations only. The internal switch topology and pin functions (e.g., dedicated Switch Collector and Emitter) do not allow reconfiguration into a single-inductor buck-boost (SEPIC or Ćuk) without external switches or major circuit modification beyond datasheet guidance.
What is the purpose of the Driver Collector (Pin 8) on MC33063AP-P2?
The Driver Collector (Pin 8) enables non-Darlington switch operation: when disconnected from Pin 1, it allows external control of the output transistor's base drive, reducing saturation voltage to 0.7 V at 1 A. This configuration requires careful forced β design (≥10) to avoid slow turn-off at high frequencies (>30 kHz) and elevated temperatures.
How does the current limit function on MC33063AP-P2?
The MC33063AP-P2 implements current limiting by monitoring voltage across an external sense resistor connected to Pin 7 (IPk). When this voltage reaches 300 mV (typical), the PWM controller reduces duty cycle to maintain constant peak switch current. This is hardware-based foldback limiting - independent of input voltage and unaffected by temperature drift within spec.
Is MC33063AP-P2 RoHS compliant?
Yes, MC33063AP-P2 is RoHS compliant, as confirmed by Texas Instruments' packaging addendum: all PDIP variants (including MC33063AP, MC33063APE4, and MC33063AP.A) carry "Yes" in the RoHS column and use NiPdAu (NIPDAU) lead finish. The device meets EU Directive 2011/65/EU requirements without exemptions.
MC33063AP-P2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Boost, Buck
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MC33063AP-P2 FAQ
1.How can I place an order for MC33063AP-P2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33063AP-P2 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 MC33063AP-P2 reliable?
The price and inventory of MC33063AP-P2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33063AP-P2 is usually 5 days.
3.What payment methods are accepted for MC33063AP-P2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33063AP-P2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33063AP-P2?
MC33063AP-P2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33063AP-P2 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 MC33063AP-P2?
For technical support, including MC33063AP-P2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33063AP-P2 requirements.
6.How does Aetrix verify that MC33063AP-P2 is sourced from the original manufacturer or authorized distributors?
All MC33063AP-P2 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 MC33063AP-P2 meets industry standards.
7.What is the process for return or replacement of MC33063AP-P2?
All MC33063AP-P2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33063AP-P2, 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 MC33063AP-P2 part is unused and in its original packaging.
Return procedure for MC33063AP-P2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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