NXP Semiconductors MC34708VK

Overview

MC34708VK from NXP Semiconductors (formerly Freescale) is a Power Management Integrated Circuit (PMIC) engineered for i.MX50 and i.MX53 application processors. It integrates six multi-mode buck regulators, one boost regulator, eight LDOs, a 10-bit ADC, RTC with coin-cell backup/charger, SPI/I²C interface, and USB/UART/audio switching logic. It delivers precise power sequencing and thermal-aware regulation in portable navigation and smart mobile devices.

For engineers reviewing the MC34708VK datasheet, MC34708VK pinout, MC34708VK application, or MC34708VK equivalent, this page provides verified technical context, validated package mapping to 206-ball MAPBGA (8.0 × 8.0 mm, 0.5 mm pitch), confirmed regulator count and output capabilities, real-time clock functionality with crystal oscillator support, and alternative selection guidance for i.MX5x-based power architecture upgrades.

Technical Context

The MC34708VK implements a hierarchical power tree with five independent switching regulators (SW1–SW5), including dual-phase DDR buck (SW4), 2 A core buck (SW1), 1 A memory/peripheral bucks (SW2/SW3/SW5), and a 380 mA USB OTG boost (SWBST). Each buck supports programmable voltage, current limit, and DVS control via SPI/I²C registers.

Its analog subsystem includes a 10-bit ADC with 14-channel input multiplexer supporting battery monitoring, thermal sensing (BPTHERM, TSX1/Y1), and touch screen interface (TSX1/TSY1); integrated RTC uses internal 32.768 kHz oscillator or external crystal (XTAL1/XTAL2) with VSRTC output and LICELL coin-cell charging capability.

Key Specifications

Pinout & Package

MC34708VK is housed in a 206-ball MAPBGA package measuring 8.0 × 8.0 mm with 0.5 mm ball pitch (Ordering suffix VK). The package supports fine-pitch routing and thermal dissipation via central ground balls and dedicated GNDREG/GNDCORE planes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PMIC applications.

Compared with MC34708VM, MC34708VK offers tighter board area utilization and better high-frequency noise immunity due to shorter trace lengths; versus PF3000, it retains unique USB/audio switching and 4-wire touchscreen support critical for i.MX5x-based PNDs and tablets.

Availability

MC34708VK is available at Aetrix Electronics and suitable for tablet power architectures, smart mobile device PMIC implementations, and portable navigation devices requiring stable component supply and long-term lifecycle support.

Supply support for MC34708VK 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

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in ARM-based processor power management.

The MC34708VK belongs to NXP's i.MX-optimized PMIC product line, designed specifically to simplify power architecture for Freescale/NXP i.MX50 and i.MX53 application processors in portable and embedded systems.

FAQ

What is the operating temperature range for the MC34708VK?

The MC34708VK is rated for industrial operation from –40 °C to +85 °C ambient temperature. This range is validated per Freescale Semiconductor's datasheet Rev. 11.0 (November 2013) and applies to the VK-suffix 206-ball MAPBGA package. Thermal derating curves and junction temperature estimation methods are provided in Section 8.4 of the official datasheet for MC34708VK design validation.

Does the MC34708VK support USB OTG functionality?

Yes, the MC34708VK supports USB OTG through its integrated SWBST boost regulator (380 mA, 5 V output), VUSB regulator, and analog USB switch (DP/DM/DPLUS/DMINUS routing). It enables host-mode VBUS generation and automatic cable ID detection via the UID pin, eliminating external transceivers in i.MX50/53-based designs where MC34708VK serves as the primary USB power and signal manager.

How many power rails can the MC34708VK generate simultaneously?

The MC34708VK can generate up to 15 regulated power rails simultaneously: six switching regulators (SW1–SW5 + SWBST), eight LDOs (VREFDDR, VPLL, VDAC, VUSB2, VGEN1, VGEN2, VSRTC, VALWAYS), and one always-on reference (VCOREREF). All rails are independently configurable and sequenced via SPI/I²C or hardware PUMS pins, as documented in the MC34708VK functional description (Section 6.3).

Is the MC34708VK pin-compatible with other variants like MC34708VM?

No, the MC34708VK is not pin-compatible with MC34708VM. Although both share identical die functionality and register mapping, MC34708VK uses a 206-ball MAPBGA with 8.0 × 8.0 mm body and 0.5 mm pitch, whereas MC34708VM uses a 206-ball MAPBGA with 13.0 × 13.0 mm body and 0.8 mm pitch. Ball placement, thermal pad layout, and PCB footprint differ significantly - requiring separate PCB designs for each variant.

What interfaces does the MC34708VK support for configuration and monitoring?

The MC34708VK supports both SPI and I²C serial interfaces for full register-level configuration, status monitoring, and fault reporting. SPI operates at up to 10 MHz with CS/CLK/MOSI/MISO pins; I²C uses open-drain SDA/SCL with programmable address. Both interfaces access identical register maps (Section 7.10), enabling flexible firmware integration whether the host processor uses SPI or I²C as its primary control bus for MC34708VK.