Texas Instruments TPS65921BZBHR

Overview

TPS65921BZBHR from Texas Instruments is a highly integrated power management IC (PMIC) with USB 2.0 HS transceiver, 3 buck converters (VDD1 up to 1.2 A), 4 configurable LDOs, 10-bit ADC, RTC, keypad interface, and clock management for OMAP™ application processors. It operates from 2.7 V to 4.5 V input and supports 1-GHz processor operation via SmartReflex™ dynamic voltage scaling.

For engineers reviewing the TPS65921BZBHR datasheet, TPS65921BZBHR pinout, TPS65921BZBHR application, or TPS65921BZBHR equivalent, key selection considerations include its triple-buck + quad-LDO architecture, ULPI 1.1 interface compliance, 32-kHz crystal oscillator integration, thermal shutdown protection, and µBGA-120 (ZQZ) package compatibility with OMAP-based mobile platforms.

Technical Context

The TPS65921BZBHR implements three independent synchronous step-down converters-VDD1 (1.2 A max), VDD2, and VIO-with dedicated SmartReflex Class-3 control for VDD1/VDD2, enabling real-time dynamic voltage scaling in OMAP systems. Its embedded USB 2.0 HS transceiver features a 12-bit ULPI 1.1 interface, integrated charge pump (CP), and OTG-compliant PHY with DP/DM differential signaling.

Clock subsystem includes a 32-kHz crystal oscillator with internal 8–12 pF load capacitance, HF clock slicer supporting 19.2/26/38.4 MHz outputs, and buffered 32KCLKOUT/HFCLKOUT signals referenced to IO.1P8 (1.8 V). All regulators, ADC, RTC, and keypad logic are controlled via high-speed I²C with configurable resource mapping.

Key Specifications

Pinout & Package

TPS65921BZBHR uses a 120-ball plastic ball grid array (PBGA) package designated ZQZ, measuring 6.0 mm × 6.0 mm with 0.5-mm ball pitch. The package is RoHS-compliant and designed for fine-pitch SMT assembly on high-density mobile PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power management and USB interface applications.

Compared with TPS65921ZQZ, TPS65921BZBHR guarantees 1.2-A VDD1 output and SmartReflex Class-3 compliance for 1-GHz operation, while TPS65950ZCH offers higher current and newer features but requires PCB redesign due to different package and register layout.

Availability

TPS65921BZBHR is available at Aetrix Electronics and suitable for mobile phones, OMAP-based smartphones, e-book readers, and MP3 players requiring stable component supply, long-lifecycle support, and automotive-grade reliability validation.

Supply support for TPS65921BZBHR 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in energy-efficient IC design.

The TPS65921 product line was engineered specifically to address the integrated power, USB, and peripheral interface demands of OMAP application processors in portable computing and communications devices.

FAQ

What is the maximum supported output current for the VDD1 buck converter in TPS65921BZBHR?

The TPS65921BZBHR supports up to 1.2 A on the VDD1 buck converter, as explicitly specified in the device features and recommended operating conditions. This rating is validated for 1-GHz OMAP processor operation and distinguishes it from non-B variants like TPS65921ZQZ. The TPS65921BZBHR datasheet confirms this value under both typical and maximum load conditions with appropriate external inductor and capacitor selection.

Does TPS65921BZBHR include an integrated 32-kHz crystal oscillator?

Yes, the TPS65921BZBHR integrates a 32.768-kHz crystal oscillator with internal 8–12 pF load capacitance on the 32KXIN/32KXOUT pins. This eliminates the need for external load capacitors and simplifies RTC timing circuitry. The oscillator supports both crystal and bypass modes, with start-up time of 360 ms at 25°C and active current as low as 0.8 µA in low-jitter mode.

What USB interface standard does TPS65921BZBHR implement?

The TPS65921BZBHR implements a USB 2.0 High-Speed (480 Mbps) transceiver compliant with OTG 1.3 and featuring a 12-bit ULPI 1.1 interface. It includes an integrated charge pump for VBUS generation, DP/DM differential signaling, and full ID/VBUS detection logic - enabling direct connection to OMAP UTMI+ macrocells without external PHY components.

How many configurable LDOs are included in TPS65921BZBHR?

The TPS65921BZBHR includes four general-purpose configurable LDOs: VMMC1, VDAC, VAUX2, and VPLL1. Each is programmable via I²C, supports dynamic voltage scaling, and delivers up to 220 mA (VMMC1). Two of these - VDAC and VAUX2 - are specified for low-noise, high-PSRR operation critical for analog subsystems and RF biasing.

What package type and dimensions does TPS65921BZBHR use?

The TPS65921BZBHR uses a 120-ball µBGA package designated ZQZ, with physical dimensions of 6.0 mm × 6.0 mm and 0.5-mm ball pitch. This RoHS-compliant package is optimized for high-density mobile PCBs and features thermal resistance characteristics of RΘJA = 46°C/W under still-air conditions.