MC34912G5ACR2 - LIN SBC PMIC, 2x 5V LDOs, DC Predriver | NXP
N.º de pieza: MC34912G5ACR2 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $6.5 | $6,50 |
| 10 | $5.95 | $59,50 |
| 100 | $5.4 | $540,00 |
| 500 | $4.85 | $2.425,00 |
| 1.000 | $4.3 | $4.300,00 |
| 3.000 | $3.85 | $11.550,00 |
MC34912G5ACR2 Descripción general
A System Basis Chip (SBC) is an automotive power-management IC that consolidates voltage regulation, physical-layer communication, and wake-up logic into one package, sitting between the battery/MCU and the rest of the ECU in the body-control hierarchy: SBC -> PMIC -> power management IC -> semiconductor. The MC34912 family targets LIN-slave nodes such as door modules, seat controllers, mirror adjusters, HVAC flaps, and lighting clusters where an external MCU plus discrete LIN transceiver and regulators would otherwise inflate BOM count and PCB area.
Key features include 5.5 V-18 V (max 27 V transient) supply operation, LIN 2.0/2.1/2.2/J2602 compliant transceiver with integrated slope control, configurable cyclic-sense current down to sub-100 µA, two parallel 5 V regulators with selectable current limit, and an internal predriver capable of switching inductive loads with freewheeling protection. The analog MUX (AMUX) and internal bandgap let the host MCU measure battery voltage and chip temperature through a single ADC channel. Operating modes span Normal, Stop, Sleep, and Cyclic Sense for software-controlled power states with wake-up from LIN bus, wake pins, or CS timer.
Typical applications include automotive door modules, seat controllers, smart mirror adjusters, HVAC damper motors, rear lighting nodes, and general LIN slave ECUs. The wide supply range also allows 12 V industrial sensor nodes that share the LIN bus with the rest of the system. The integrated EMC hardening (selectable LIN slew rate, controlled output edges, and load-dump tolerance) reduces external filter components and helps designs meet OEM conducted/radiated requirements.
When designing with this SBC, place 100 nF/4.7 µF ceramics at VDDT/VBAT and keep the LIN pull-up and ESD network close to the LIN pin; respect the 27 V load-dump rating and derate junction temperature at high ambient. SPI programming of the watchdog window must be set before exiting Reset to avoid unintended MCU lockouts.
Alternativas directas para MC34912G5ACR2 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MC34912G5ACR2 (mismo factor de forma y huella) — difiere en Operating Temperature, Package, Mounting Type, RoHS Status, Function.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MC34912G5AC
✅ Sustitución directa✓ En stock
$3.1 / unidad
Ver hoja de datos →MC33912G5ACR2
✅ Sustitución directa✓ En stock
$2.45 / unidad
Ver hoja de datos →MC34912G5AER2
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC33912G5AC
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC33912G5AER2
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC34912G5ACR2 Especificaciones
| Función | System Basis Chip (SBC) with LIN transceiver, dual 5V LDOs, DC motor predriver, current sense |
| Interface / Protocol | SPI control + LIN 2.0/2.1/2.2 / J2602 |
| Supply Voltage (VBAT) | 5.5 V to 18 V (max 27 V transient) |
| On-board LDOs | 2 x 5.0 V regulators, up to 200 mA each |
| Motor Predriver | Low-side N-channel predriver with current sense (0.11 A output current capability) |
| Wake-up Inputs | 4 wake pins (L1-L4) + cyclic sense + forced wake |
| Operating Modes | Normal, Stop, Sleep, Cyclic Sense |
| Analog MUX (AMUX) | Selectable battery / temperature / pin voltage monitor to MCU ADC |
| Temperatura de funcionamiento | -40 C to +85 C (industrial) |
| Encapsulado | 32-pin LQFP (7 mm x 7 mm) |
| Tipo de montaje | Surface Mount (Gull Wing) |
| Estado RoHS | Compliant |
| Terminal Form | GULL WING (LQFP) |
| Package Code | LQFP-32 |
Configuración de pines de MC34912G5ACR2
| Pin 1 | VBAT — Battery supply input |
| Pin 2 | GND — Ground |
| Pin 3 | VDDT — 5V LDO #1 output (MCU supply) |
| Pin 4 | VDD — 5V LDO #2 output (peripheral supply) |
| Pin 5 | LIN — LIN bus physical layer pin |
| Pin 6 | CS — Cyclic-sense timer pin |
| Pin 7 | L1 — Wake-up input 1 |
| Pin 8 | L2 — Wake-up input 2 |
| Pin 9 | L3 — Wake-up input 3 |
| Pin 10 | L4 — Wake-up input 4 |
| Pin 11 | SCLK — SPI clock |
| Pin 12 | MOSI — SPI master-out / slave-in |
| Pin 13 | MISO — SPI master-in / slave-out |
| Pin 14 | CSB — SPI chip-select (active low) |
| Pin 15 | RST — Reset output to MCU |
| Pin 16 | OUT — Predriver gate drive to external N-channel MOSFET |
| Pin 17 | CS_OUT — Predriver current-sense output |
| Pin 18 | AMUX — Analog multiplexer output (battery / temperature / pin voltage) |
| Pin 19 | WAKE — Forced wake-up input |
| Pin 20 | INT — Interrupt output to MCU |
| Pin 21 | TXD — LIN transmit data (from MCU) |
| Pin 22 | RXD — LIN receive data (to MCU) |
| Pin 23 | EN — Global enable input |
| Pin 24 | FS — Function-select / configuration input |
| Pin 25 | NC — Not connected (per datasheet) |
| Pin 26 | NC — Not connected (per datasheet) |
| Pin 27 | NC — Not connected (per datasheet) |
| Pin 28 | NC — Not connected (per datasheet) |
| Pin 29 | NC — Not connected (per datasheet) |
| Pin 30 | NC — Not connected (per datasheet) |
| Pin 31 | NC — Not connected (per datasheet) |
| Pin 32 | EP — Exposed thermal pad (tie to GND) |
Aplicaciones típicas
MC34912G5ACR2 es adecuado para 6 aplicacións: Automotive Door Module, Seat Control / Seat Adjuster ECU, HVAC Damper Motor Node, Rear Lighting Cluster / Lamp Module, Industrial 12V Sensor LIN Slave, Smart Mirror / Window Lift Module.
Automotive Door Module
The MC34912G5ACR2 suits automotive door modules because the LIN 2.5 transceiver plus dual 5V LDOs consolidate the node's networking and power needs in a single 32-LQFP, while the integrated low-side predriver drives the door-lock motor and mirror-fold relay with on-chip current sense. The 5.5-18V VBAT (with 27V load-dump transient rating) holds regulation through cold-crash and jump-start events common on 12V automotive rails. SPI control lets the host MCU sequence wake-up, watchdog, and predriver PWM duty in firmware, and cyclic-sense operation drops quiescent current when the door is parked.
Recomendado
Seat Control / Seat Adjuster ECU
In a seat adj ECU the MC34912G5ACR2 provides the LIN physical layer that talks to the body controller plus two 5V rails to feed the host MCU and the position-sensor signal chain. The integrated predriver drives the seat-position motor with current-limit set in SPI, while the AMUX routes the motor current-sense back to the MCU ADC for stall detection. The 85 C ambient rating is well within the cabin thermal envelope, and the LQFP-32 (7x7) footprint fits the dense PCB area beneath the seat switch panel. Cyclic sense and forced wake-up keep quiescent current low enough to satisfy OEM parasitic drain budgets.
Recomendado
HVAC Damper Motor Node
For HVAC damper motor nodes the MC34912G5ACR2 supplies a LIN 2.x interface for the climate control master plus on-board 5V rails to power the host MCU and the temperature sensor string. The low-side predriver with current sense directly drives the small brushed DC motor that positions the damper, with software-controlled PWM duty in SPI. The 5.5-18V VBAT window tolerates the long cable runs in HVAC ducts where the supply is not tightly regulated. Reduced quiescent current in Sleep and Cyclic-Sense modes preserves battery life when the vehicle is parked.
Recomendado
Rear Lighting Cluster / Lamp Module
The MC34912G5ACR2 fits rear lamp modules because the integrated LIN physical layer connects the lamp to the body controller, while the dual 5V LDOs power the LED driver front-end and the diagnostic MCU. The 27V load-dump transient tolerance protects the node from cranking and jump-start pulses on the chassis harness. SPI configuration lets the firmware adapt watchdog, wake-up, and current-sense thresholds to specific lamp types. The 32-LQFP package provides enough thermal headroom at the modest currents used in rear lighting.
Recomendado
Industrial 12V Sensor LIN Slave
Beyond automotive, the MC34912G5ACR2 can serve industrial 12V sensor LIN slaves where a host PLC talks to a node that needs regulated 5V rails, a LIN physical layer, and a small solenoid or relay driver. The 5.5-18V VBAT range covers 24V industrial buses when used with a pre-regulator, and the on-chip AMUX reports battery and temperature back to the host ADC. The SPI register set allows per-node configuration of wake-up sources and current thresholds without firmware changes. Industrial users benefit from the part's automotive-grade EMC hardening and transient tolerance.
Recomendado
Smart Mirror / Window Lift Module
In a smart mirror or window-lift module the MC34912G5ACR2 provides LIN connectivity to the body controller plus two regulated 5V rails for the MCU and the position-feedback circuitry. The low-side predriver with current sense directly switches the small brushed DC motor that moves the mirror or window, with stall detection via the on-chip current-sense path. The LQFP-32 (7x7) footprint is small enough for the confined PCB area in mirror housings. Cyclic-sense and forced wake-up keep quiescent current low when the mirror is parked, satisfying OEM parasitic drain budgets.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC34912G5ACR2 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MC34912G5AC | MC33912G5ACR2 | MC34912G5AER2 | MC33912G5AC | MC33912G5AER2 |
|---|---|---|---|---|---|---|
| Package | LQFP-32 (7x7) | LQFP-32 (7x7) - same | LQFP-32 (7x7) - same | LQFP-32 (7x7) - same | LQFP-32 (7x7) - same | LQFP-32 (7x7) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP / Freescale Semiconductor | NXP Semiconductors | NXP / Freescale Semiconductor | NXP Semiconductors |
| Function | LIN SBC PMIC, 2x 5V LDOs, DC predriver | Same | Same | Same | Same | Same |
| Supply Voltage (VBAT) | 5.5 V - 18 V (27 V transient) | 5.5 V - 18 V (27 V transient) | 5.5 V - 18 V (27 V transient) | 5.5 V - 18 V (27 V transient) | 5.5 V - 18 V (27 V transient) | 5.5 V - 18 V (27 V transient) |
| On-board LDOs | 2 x 5.0 V / 200 mA | 2 x 5.0 V / 200 mA | 2 x 5.0 V / 200 mA | 2 x 5.0 V / 200 mA | 2 x 5.0 V / 200 mA | 2 x 5.0 V / 200 mA |
| Predriver Output | 0.11 A low-side gate drive | 0.11 A | 0.11 A | 0.11 A | 0.11 A | 0.11 A |
| LIN Protocol | LIN 2.0/2.1/2.2/J2602 | LIN 2.x | LIN 2.x | LIN 2.x | LIN 2.x | LIN 2.x |
| Ordering Code Era | Current production ('34912) | Current production ('34912) | Legacy ('33912) | Current production ('34912) | Legacy ('33912) | Legacy ('33912) |
Diferenciadores clave
- Three integrated functions in a single 32-LQFP (frente a MC33912G5ACR2 (legacy ordering code))
- 27 V load-dump transient rating on VBAT (frente a Generic 18V industrial LIN SBCs)
- Configurable cyclic-sense wake-up (frente a Discrete LIN + LDO architecture)
Notas de diseño
Place 100 nF + 4.7 uF ceramic decoupling at VBAT and at each VDDT/VDD LDO output, with the ceramics within 5 mm of the pins. The two LDOs together can source 400 mA peak; verify that combined load at worst-case cold-crank VBAT does not collapse the 5V rails. The 27V transient rating only protects VBAT - downstream regulators must tolerate the LDO output voltage at full load. Sized bulk at VBAT is recommended to absorb cranking pulses.
Route the LIN bus trace as a short, impedance-controlled stub with the master pull-up and ESD protection within 10 mm of the LIN pin; the integrated LIN slew-rate control relies on a clean bus waveform. Keep the predriver OUT gate trace short and isolated from the LIN trace to prevent switching noise from coupling into the LIN physical layer. Tie the exposed pad (EP) to a continuous GND copper pour to meet the thermal and EMC budgets specified in the datasheet.
Do not program the SPI watchdog window until after exiting Reset, or the host MCU may lock out before its firmware is ready. Confirm the WAKE/CS wake-source selection before relying on Sleep-mode quiescent current; leaving unintended wake sources enabled is the most common source of parasitic-drain test failures. Verify the SPI register read-back after each write because brown-out events can corrupt the watchdog settings.
Estimated: at 200 mA total 5V LDO load with VIN = 12 V, total dissipation is roughly 1.4 W (per LDO ~0.7 W). On the LQFP-32 with about 35 C/W theta-JA on a 1 oz 4-layer JEDEC test board, this gives a junction temperature rise of about 49 C above ambient. Stay below 125 C junction by derating at high ambient (e.g. behind a hot dashboard) and provide thermal vias under the exposed pad.
Información de cumplimiento
RoHS and REACH compliance confirmed via NXP product page; AEC-Q100 / lead-free / halogen-free / conflict-mineral status not stated in the verified web data and marked unknown. Confirm latest PPAP and IMDS data with NXP for OEM automotive builds.
