LP3929TMEX-AACQ/NOPB

Translators, Level Shifters Overview

The LP3929TMEX-AACQ/NOPB is a high-speed bi-directional level shifter and ultra-low-dropout CMOS voltage regulator designed for portable applications. It translates 1.8 V LVCMOS signals on the host side to 2.85 V LVCMOS levels on the card side, supporting miniSD/SD 4-bit bi-directional data buses. The integrated LDO provides up to 200 mA from a 3.05 V to 5.5 V input range. Key electrical parameters include a typical propagation delay of 3 ns, a maximum channel-to-channel skew of 1 ns, and thermal shutdown at 160°C. The device operates within an ambient temperature range of -30°C to +85°C.

Translators, Level Shifters Feature Summary

• Integrates six-signal level translation with independent direct control over CMD, Data0, and Data1-3 paths to support mini SD state machine requirements.
• Features Application Specific Integrated Passives (ASIP) on the card side, including integrated pull-up, pull-down, series resistors, and capacitors for EMC filtering.
• Provides robust IEC ESD protection rated at ±15 kV air gap and ±8 kV direct contact on the B-side channels.
• Includes a fast turn-on low-dropout regulator stable with small ceramic and high-quality tantalum output capacitors.

Translators, Level Shifters Applications

• Portable and wireless applications requiring combined level translation and power supply generation in a compact footprint
• MiniSD or SD 4-bit bi-directional data bus interfaces between host and card sides
• Mobile phone and battery-powered wireless devices needing integrated PSU and signal conditioning

Translators, Level Shifters Procurement Notes

Verify the specific suffix AACQ against the latest Texas Instruments Package Option Addendum to confirm current manufacturing status and lead finish specifications. Ensure that the DSBGA package handling procedures account for light sensitivity, as exposure to direct sunlight or halogen lamps can cause misoperation. Confirm RoHS compliance details directly with the manufacturer prior to finalizing procurement orders.

Translators, Level Shifters Selection Notes

Select this component when a single solution is required for both voltage regulation and signal level shifting in space-constrained designs. The device is suitable for systems operating with a 1.8 V host interface and a 2.85 V card interface. Designers must ensure the output capacitor meets the specified capacitance and ESR ranges to maintain LDO stability under varying load conditions.

Translators, Level Shifters Part Context

This part belongs to the LP3929 family, which combines a high-speed bi-directional level shifter with an ultra-low-dropout CMOS voltage regulator. It is specifically engineered for portable electronics where board space is limited. The integration of ASIP components reduces the need for external passive filters, simplifying the overall circuit design while maintaining signal integrity for high-speed data buses.

Translators, Level Shifters Replacement Considerations

LP3929TME-AACQ/NOPB

Translators, Level Shifters FAQ

How does the LP3929 handle EMC filtering?

The device integrates Application Specific Integrated Passives (ASIP) on the card side, which includes built-in pull-up, pull-down, series resistors, and capacitors specifically designed for EMC filtering.

What are the environmental constraints regarding light exposure?

Exposing the DSBGA device to direct sunlight or strong light sources like halogen lamps can cause misoperation. Red and infrared wavelengths have the most detrimental effect on performance.

Is the LDO stable with no external load connected?

Yes, the LDO remains stable and in regulation with no external load connected to the VDDB output, which is beneficial for applications such as CMOS RAM keep-alive.