NXP Semiconductors KIT33730EKEVBE

Overview

KIT33730EKEVBE from Freescale Semiconductor is an evaluation board for the MC33730EK automotive power management IC. It implements a 5.0 V buck regulator (3.5 A current limit), two programmable linear regulators (VDDL, VDD3), one standby regulator (VKAM), and two protected 5.0 V sensor supplies (VREF1/VREF2), all operating from 4.5–26.5 V input. Designed for Freescale 32-bit MCU systems, it supports power sequencing, slew-rate control, reverse battery protection, and hardware reset timing.

For engineers reviewing the KIT33730EKEVBE datasheet, KIT33730EKEVBE pinout, KIT33730EKEVBE application, or KIT33730EKEVBE equivalent, this board enables rapid validation of multi-rail automotive power architecture-including VDDH regulation, VKAM keep-alive operation down to 4.5 V, VDD3/VDDL voltage programming via P1/P2/P3 pins, and open-drain reset monitoring (RSTKAM/RSTH/RSTL/RST3) under real thermal and load conditions.

Technical Context

The KIT33730EKEVBE implements the full functional block diagram of the MC33730EK, including its fixed-frequency PWM buck controller with adjustable oscillator (100–500 kHz), slew-rate configurable via SR pin (SW/BOOT/GND), and integrated charge pump (CP) for low-battery gate drive enhancement. It exposes all 32 SOICW-EP pins-including KA_VBAT for keep-alive bias, REGON for MCU-controlled hold-on, and HRT for hardware reset timer resistor programming.

It supports dual operational modes: Wake mode (full regulation of VDDH, VDDL, VDD3, VKAM, VREF1/VREF2) and Sleep mode (VKAM only, IQ ≤ 500 µA). Power sequencing is implemented via ignition-driven VIGN and logic-level REGON inputs, with reset thresholds calibrated per VDDH (±4.0–13.0%), VDDL/VDD3 (−3.0 to −13.0%), and VKAM/VDD3_SBY (−3.0 to −30%).

Key Specifications

Availability

KIT33730EKEVBE is available at Aetrix Electronics and suitable for automotive ECU development, 32-bit MCU power validation, vehicle body control module prototyping, and functional safety-compliant power architecture testing requiring stable component supply and traceable reference design implementation.

Supply support for KIT33730EKEVBE 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

Freescale Semiconductor (now part of NXP Semiconductors) is a global leader in automotive and industrial microcontrollers and analog power solutions, with deep expertise in AEC-Q100-qualified mixed-signal ICs.

The MC33730 product line was designed specifically for automotive power management in 32-bit MCU-based electronic control units, integrating buck conversion, multiple programmable LDOs, sensor supply protection, and fail-safe supervision in a single SOICW package.

FAQ

What is the primary function of the KIT33730EKEVBE evaluation board?

The KIT33730EKEVBE evaluation board is a fully assembled reference platform for the MC33730EK automotive power management IC. It enables engineers to validate the complete functionality of the IC-including its 5.0 V buck regulator (VDDH), programmable linear regulators (VDDL, VDD3, VKAM), protected sensor supplies (VREF1/VREF2), reset supervision, and power sequencing-under real automotive voltage and thermal conditions. The board includes all necessary external components, test points, and configuration jumpers to exercise every pin and feature of the MC33730EK.

Does the KIT33730EKEVBE support both wake and sleep modes as described in the MC33730EK datasheet?

Yes, the KIT33730EKEVBE fully implements the dual-mode operation of the MC33730EK. In Wake mode (VIGN high or REGON high), it regulates VDDH, VDDL, VDD3, VKAM, and VREF1/VREF2 simultaneously. In Sleep mode (VIGN low and REGON low), only the VKAM standby regulator remains active, drawing ≤500 µA quiescent current at 14 V KA_VBAT. The board provides direct access to VIGN, REGON, and KA_VBAT inputs to enable controlled mode transitions and measurement of sleep current.

How is voltage programming implemented on the KIT33730EKEVBE for VDDL, VDD3, and VKAM outputs?

Voltage programming on the KIT33730EKEVBE is implemented via the P1, P2, and P3 logic inputs of the MC33730EK, which are accessible through onboard jumpers or test points. These three pins configure eight possible output voltage combinations per regulator, as defined in Table 7 of the MC33730EK datasheet. For example, setting P1=H, P2=L, P3=H selects 3.3 V for VDDL and VDD3, and 5.0 V for VKAM. The board includes pull-up/pull-down resistors and header options to simplify configuration without soldering.

Can the KIT33730EKEVBE be used to evaluate reverse battery protection functionality?

Yes, the KIT33730EKEVBE supports reverse battery protection evaluation via the PFD (Protection FET Drive) output and KA_VBAT input. The board includes provisions for connecting an external N-channel MOSFET to the PFD pin, enabling users to verify proper gate drive timing, voltage thresholds (KA_VBAT withstands −18 V), and protection behavior during reverse-polarity events. The KA_VBAT pin is internally reverse-battery protected, allowing safe biasing even when VBAT is reversed, and the board's layout isolates KA_VBAT circuitry to preserve this capability during testing.

What type of reset monitoring does the KIT33730EKEVBE provide, and how are thresholds configured?

The KIT33730EKEVBE provides four independent open-drain reset outputs-RSTKAM (VKAM), RSTH (VDDH), RSTL (VDDL), and RST3 (VDD3)-each with factory-trimmed lower and upper threshold windows. Thresholds are fixed per regulator: VDDH resets at ±4.0–13.0% deviation, while VDDL/VDD3/VKAM/VDD3_SBY reset at −3.0 to −30% undershoot depending on configuration. The board exposes all RSTx pins to test points and headers, enabling connection to oscilloscopes or logic analyzers to capture reset assertion timing, pulse width, and recovery behavior during brown-out or over-voltage events on the KIT33730EKEVBE.