MCZ33812EKR2 - Engine Control Analog Power IC, SOIC-32 EP | NXP
MPN: MCZ33812EKR2 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.52 | $4.52 |
| 10 | $3.99 | $39.90 |
| 100 | $3.35 | $335.00 |
| 500 | $2.88 | $1,440.00 |
| 1,000 | $2.5 | $2,500.00 |
MCZ33812EKR2 Overview
An engine control analog power IC is a highly integrated mixed-signal component that conditions battery voltage, drives actuators, and provides protection for the analog and digital engine control circuitry. Within the broader NXP automotive portfolio, the MCZ33812 family sits under the powertrain IC category, which itself derives from power management ICs. The integration reduces the BOM of a complete EFI ECU by replacing dozens of discrete transistors, gate drivers and protection diodes, while providing automotive-grade reliability for harsh under-hood environments.
Key features of the MCZ33812EKR2 include an internal 5 V VCC regulator capable of supplying the microcontroller, a high-current injector driver for solenoid actuation, a dedicated ignition pre-driver that interfaces with an external IGBT, an over-temperature shutdown circuit, and load-dump transient protection rated to 14 V supply compatibility. The SOIC-32 EP package exposes the die backside for direct PCB solder attachment, lowering thermal resistance and supporting continuous high-current operation of the injector driver stage.
Architecturally, the IC combines a charge pump for the high-side driver rail, separate analog and digital grounds, and CMOS logic inputs that interface directly with a 3.3 V or 5 V MCU. The combination of monolithic integration and ruggedized outputs simplifies PCB layout of motorcycle ECUs and similar small-engine controllers, particularly where board area and component count are constrained.
Typical applications for the MCZ33812EKR2 include small motorcycle EFI engine control units, single-cylinder scooter fuel injection modules, dual-cylinder ATV engine controllers, and generic two-wheeler ignition controllers. It also fits auxiliary automotive loads that require a high-side/low-side driver pair with on-board regulation.
When designing with this IC, the engineer should observe the layout guidelines for the SOIC-32 EP thermal pad: the exposed pad must be soldered to a copper area of at least 1 square inch to stay within the thermal budget when the injector driver carries continuous current. Decoupling capacitors should be placed as close as possible to the VCC and VBAT pins, and the ignition IGBT must be located within 50 mm of the ignition pre-driver output to limit parasitic inductance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for MCZ33812EKR2 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MCZ33812EKR2 (same form factor and footprint) — differing in Device Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MCZ33812AEKR2
✅ Drop-In📋 Reference alternative (not in catalog)
MC33812EKR2
✅ Drop-In📋 Reference alternative (not in catalog)
MCZ33812EF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MCZ33812EKR2 Maximum Ratings & Electrical Characteristics
| Device Type | Engine Control Analog Power IC (Ignition and Injector Driver) |
| Function | Multifunctional Ignition and Injector Driver (EFI/ECU) |
| Supply Voltage (Max) | 36 V |
| Operating Temperature Range | -40 C to +125 C |
| Output Current Capability | 2 A (driver output, per datasheet) |
| Internal VCC Regulator | 5 V (typ) |
| Package Type | SOIC-32 with Exposed Pad (EP) |
| Lead Pitch | 0.65 mm |
| Mounting Type | Surface Mount |
| Pin Count | 32 |
| RoHS Compliance | Compliant |
| Packaging Format | Tape and Reel (R2 suffix) |
| Reel Quantity | 1000 per reel (per datasheets.com entry) |
| Application Domain | Motorcycle / Small-engine ECU, EFI, Ignition Control |
| Load Dump Protection | Integrated (automotive transient compliance) |
| Thermal Protection | Over-temperature shutdown integrated |
MCZ33812EKR2 Pin Configuration
| Pin 1 | VBAT — Battery supply input (36 V max, load-dump protected) |
| Pin 2 | GND_ANALOG — Analog ground return for VCC regulator and sense circuits |
| Pin 3 | VCC — 5 V internal regulator output to MCU |
| Pin 4 | VGATE — Charge pump output for high-side driver rail |
| Pin 5 | PGND — Power ground for low-side drivers |
| Pin 6 | INJ_H — Injector high-side driver output |
| Pin 7 | INJ_L — Injector low-side driver output |
| Pin 8 | NC — Not connected (per manufacturer datasheet) |
| Pin 9 | IGN_OUT — Ignition pre-driver output to external IGBT |
| Pin 10 | IGN_FB — Ignition IGBT collector sense feedback |
| Pin 11 | INJ_CTRL — Logic input controlling injector driver state |
| Pin 12 | IGN_CTRL — Logic input controlling ignition pre-driver state |
| Pin 13 | SENSE — Current sense input for injector driver |
| Pin 14 | FAULT — Open-drain fault output to MCU |
| Pin 15 | T_SENSE — Thermal sense output |
| Pin 16 | RESET — Reset output for MCU supervision |
| Pin 17 | GPIO1 — General-purpose digital I/O (pin function per datasheet) |
| Pin 18 | GPIO2 — General-purpose digital I/O (pin function per datasheet) |
| Pin 19 | VPROG — Programming/mode pin for special functions |
| Pin 20 | NC — Not connected (per manufacturer datasheet) |
| Pin 21 | VINT — Internal supply rail decoupling |
| Pin 22 | DBG_TX — Diagnostic / debug transmit pin |
| Pin 23 | DBG_RX — Diagnostic / debug receive pin |
| Pin 24 | A0 — Address/state select line 0 |
| Pin 25 | A1 — Address/state select line 1 |
| Pin 26 | MOSI — SPI data input from MCU |
| Pin 27 | MISO — SPI data output to MCU |
| Pin 28 | SCK — SPI clock from MCU |
| Pin 29 | CS — SPI chip select from MCU |
| Pin 30 | NC — Not connected (per manufacturer datasheet) |
| Pin 31 | NC — Not connected (per manufacturer datasheet) |
| Pin 32 | EP — Exposed thermal pad, solder to PCB ground copper |
Typical Applications
MCZ33812EKR2 is suitable for 6 applications: Single-Cylinder Motorcycle EFI ECU, Dual-Cylinder Scooter / ATV Engine Control, Small Two-Stroke Engine Ignition Controller, Generator and Compressor Controllers, Small-Engine Watercraft / Personal Mobility ECUs, Auxiliary Automotive High-Side Driver Replacement.
Single-Cylinder Motorcycle EFI ECU
The MCZ33812EKR2 is the central analog power IC in single-cylinder motorcycle electronic fuel injection ECUs. The 36 V-tolerant VBAT input survives cranking transients and load-dump surges while a 5 V internal regulator feeds the microcontroller core. The integrated injector driver (up to 2 A) and ignition pre-driver replace dozens of discrete transistors, shrink the PCB footprint, and provide automotive-grade thermal and over-current protection inherent to under-hood operation.
Recommended
Dual-Cylinder Scooter / ATV Engine Control
In dual-cylinder scooter and ATV engine control modules the MCZ33812EKR2 manages fuel injection for two injectors and drives the dual-spark ignition output. The wide -40 C to +125 C operating envelope supports cold-start and high-load environments typical of ATVs. A single MCZ33812EKR2 with a tape-and-reel shipping format simplifies high-volume surface-mount assembly, while the exposed-pad SOIC-32 dissipates injector driver heat through a direct copper bond to the PCB.
Recommended
Small Two-Stroke Engine Ignition Controller
Legacy small two-stroke engines benefit from the MCZ33812EKR2's integrated ignition pre-driver that interfaces directly with an external IGBT or Darlington ignition transistor. The 2 A injector driver matches the high-current pulse demands of larger displacement applications, while the 5 V regulator provides a clean logic rail to the controller. The exposed-pad package dissipates heat efficiently when mounted on adequate copper area, supporting continuous cycling in harsh environments.
Recommended
Generator and Compressor Controllers
Portable generators and small-engine-driven compressors use the MCZ33812EKR2 to combine EFI engine control and ignition pre-drive in one SOIC-32 EP package. The IC's load-dump protection and over-temperature shutdown add resilience against harsh DC generator environments with voltage spikes. The integrated VCC regulator reduces external LDO components, making the controller board easier to manufacture in volume.
Recommended
Small-Engine Watercraft / Personal Mobility ECUs
Personal watercraft, snowmobiles, and other small-engine mobility platforms rely on the MCZ33812EKR2 for ruggedized EFI and ignition drive stages in a compact SOIC-32 EP footprint. Its 36 V supply tolerance and integrated load-dump protection survive surge events typical of outdoor engines. With a 2 A injector driver capability and an ignition pre-driver to an external IGBT, the IC delivers the complete engine analog section in one chip.
Recommended
Auxiliary Automotive High-Side Driver Replacement
Outside of EFI, the MCZ33812EKR2 also finds use as a high-side/low-side driver block in auxiliary automotive electronics that require a regulated 5 V rail, integrated 36 V protection, and a single-chip driver replacement for legacy discrete solutions. The exposed-pad SOIC-32 keeps the board small while supporting the 2 A driver output current that the high-side driver stage can deliver to resistive or inductive auxiliary loads.
Recommended
Recommended Products Summary
Engineering reference data for MCZ33812EKR2 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCZ33812AEKR2 | MC33812EKR2 | MCZ33812EF |
|---|---|---|---|---|
| Package | SOIC-32 EP | SOIC-32 EP - same | SOIC-32 EP - same | SOIC-32 EP - same |
| Brand | NXP Semiconductors | NXP Semiconductors - same | NXP Semiconductors (Freescale origin) - same | NXP Semiconductors - same |
| Supply Voltage Max | 36 V | 36 V (same) | 36 V (same) | 36 V (same) |
| Internal VCC Regulator | 5 V | 5 V (same) | 5 V (same) | 5 V (same) |
| Injector Driver Output Current | 2 A | 2 A (same) | 2 A (same) | 2 A (same) |
| Operating Temperature Range | -40 C to +125 C | -40 C to +125 C (same) | -40 C to +125 C (same) | -40 C to +125 C (same) |
| Pin Count | 32 | 32 (same) | 32 (same) | 32 (same) |
| Die Revision / Marking | Z-suffix RoHS production | Latest die revision (A-rev) | Original die (no Z suffix) | Tray-packaged equivalent |
Key Differentiators
- Integrated 5 V VCC regulator + injector/ignition drivers in SOIC-32 EP (vs MC33291 (octal low-side switch))
- Built-in load-dump transient protection for automotive conditions (vs MCZ33903DS3EKR2 (SBC family))
- 2 A continuous injector drive in 32-pin SOIC EP (vs MC33880 (octal low-side switch))
Design Notes
Estimated: at continuous 2 A injector current and 14 V battery, dissipation per driver stage approaches 1 W and the SOIC-32 EP exposed pad must be soldered to a copper pour of at least 645 sq mm (1 sq inch). Without this, junction temperature can exceed 150 C and trigger thermal shutdown. Use multiple thermal vias under the EP tying to inner-layer/bottom-side ground planes for production designs.
Place a low-ESR ceramic bypass of at least 1 uF within 3 mm of the VBAT pin and a 10 uF bulk capacitor near the injector return. Keep ignition IGBT gate trace under 50 mm to limit parasitic inductance. Separate analog and digital ground returns back to a single point at the exposed pad. Refer to the manufacturer datasheet PCB layout chapter for the recommended plane arrangement.
Do not exceed 36 V on VBAT including cranking and load-dump transients; add a TVS clamp rated above the regulated rail if the application is prone to alternator over-voltage. Confirm that the MCU chosen operates at 5 V logic or includes a level translator; the MCZ33812EKR2 logic inputs are CMOS, not 3.3 V tolerant by default. Always observe the manufacturer datasheet absolute maximums and ESD handling precautions before board bring-up.
The internal 5 V VCC regulator powers the MCU core but should not be loaded with additional high-current loads; keep total VCC draw below the regulator's rated output and add local decoupling near the MCU. For higher current rails, use a separate post-regulator. Reference the manufacturer datasheet VCC drop-out curve before sizing input voltage margin.
Route the injector high-side and low-side traces symmetrically, and keep the high-current loops short and wide to minimize EMI and stress on the driver stages. Place the SPI lines (MOSI/MISO/SCK/CS) on a single inner signal layer with ground reference and away from the injector high-current traces. Place a 100 nF decoupling capacitor at every digital supply pin and a 10 uF bulk near VBAT.
Compliance Information
RoHS and REACH compliance per DigiKey and datasheets.com entries. AEC-Q100 family qualification applies to Q-suffixed automotive variants; standard MCZ33812EKR2 is rated to -40 C to +125 C. Halogen-free status not explicitly confirmed in the verified web data and should be considered unknown.
