Texas Instruments TPS68470YFFT

Overview

TPS68470YFFT from Texas Instruments is a highly integrated power management unit (PMU) designed specifically for compact camera modules (CCM), combining a 500-mA buck converter, dual 1-A flash LED drivers with temperature monitoring and open/short detection, five programmable LDOs (ANA, VCM, IO, S_IO, AUX1/AUX2), PLL-based clock generation, and I²C interface in a 56-pin DSBGA package. It powers both world-facing and user-facing cameras while driving flash and indicator LEDs in smartphones and tablets.

For engineers reviewing the TPS68470YFFT datasheet, TPS68470YFFT pinout, TPS68470YFFT application, or TPS68470YFFT equivalent, this device delivers tightly coordinated rail sequencing, adaptive LED current control, sensor clock synthesis up to 64 MHz, and thermal protection - all critical for CCM power integrity, flash timing accuracy, and system-level sleep/wake coordination.

Technical Context

The TPS68470YFFT integrates a synchronous buck converter (3–6 MHz switching frequency, 0.9–1.95 V output) for digital core supply and a high-efficiency boost converter (5.5 V max output, 4 A switch current limit) feeding two low-side 1-A LED current sinks with ramp control and NTC-based thermal feedback. Its PLL supports programmable HCLK outputs (4–64 MHz) with <600 ps cycle-to-cycle jitter, driven by either internal oscillator (2 MHz) or external crystal (3–27 MHz).

Five independent LDOs provide analog sensor (200 mA, 0.875–3.1 V), VCM driver (500 mA), IO/S_IO (50/150 mA), and auxiliary rails (150/80 mA), each with 17.8-mV programmable steps, short-circuit protection, and dedicated discharge resistors. All regulation, sequencing, and fault reporting are managed via I²C (400 kHz) with 7 GPIOs supporting daisy-chained sensor interfaces.

Key Specifications

Pinout & Package

TPS68470YFFT uses a 56-pin DSBGA (YFF) package measuring 3.325 mm × 2.930 mm with 0.625 mm profile, designed for space-constrained camera module integration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power management and LED driver applications.

Compared with TPS68470YFFT, TPS68480YFFT offers improved thermal resilience and auxiliary rail capacity for next-gen CCMs, while MAX20049ATG/V+T trades clock integration and VCM support for wider input voltage range - making TPS68470YFFT the optimal choice for space- and timing-critical mobile camera modules.

Availability

TPS68470YFFT is available at Aetrix Electronics and suitable for smartphone camera modules, tablet dual-camera systems, and compact camera module (CCM) reference designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS68470YFFT 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 decades of expertise in mobile and imaging solutions.

The TPS68470YFFT belongs to TI's camera power management product line, engineered to consolidate power, timing, and LED drive functions into a single chip for compact camera modules - reducing design complexity and accelerating time-to-market for mobile vision systems.

FAQ

What is the maximum supported clock frequency for HCLK outputs on the TPS68470YFFT?

The TPS68470YFFT supports programmable HCLK outputs from 4 MHz to 64 MHz with ±0.1% accuracy and <600 ps cycle-to-cycle jitter. This range covers common image sensor pixel clock requirements including MIPI CSI-2 timing, and the PLL achieves lock within 1 ms using an external 3–27 MHz crystal or internal 2 MHz oscillator. The TPS68470YFFT does not support frequencies beyond 64 MHz.

Does the TPS68470YFFT support independent control of its dual flash LED drivers?

Yes, the TPS68470YFFT provides fully independent control of DRV_WLED1 and DRV_WLED2 through separate I²C registers for current setting, ramp rate, and enable/disable. Each driver supports 0–1 A with ±7.5% accuracy above 300 mA and matches within ±10% across temperature and supply variations - enabling asymmetric flash profiles for depth sensing or dual-tone illumination.

How does the TPS68470YFFT handle thermal protection for its LED boost circuit?

The TPS68470YFFT implements dedicated thermal shutdown for the WLED boost section at 140–160°C with 20°C hysteresis. When triggered, it disables the WLED_SW switch and asserts fault status via I²C register LEDHOT. Concurrently, the WLED_NTC pin continuously monitors LED temperature using a 23.8-µA bias current and thermistor feedback, allowing software-initiated dimming before shutdown occurs - a key feature for maintaining flash reliability in TPS68470YFFT-based designs.

Can the TPS68470YFFT generate different output voltages for its multiple LDOs simultaneously?

Yes, the TPS68470YFFT supports concurrent, independent programming of all five LDO outputs (ANA_OUT, VCM_OUT, IO_OUT, S_IO_OUT, AUX1_OUT, AUX2_OUT) via I²C. Each LDO is adjustable from 0.875 V to 3.1 V in precise 17.8-mV steps, with dedicated registers ensuring no cross-talk. For example, ANA_OUT can be set to 2.8 V for sensor analog supply while VCM_OUT is configured to 3.0 V for voice coil motor drive - all active and regulated simultaneously in the TPS68470YFFT.

What is the purpose of the S_VSYNC pin on the TPS68470YFFT?

The S_VSYNC pin on the TPS68470YFFT is an input that signals active image capture periods from the camera sensor to the PMU. When asserted, it enables dynamic power optimization - such as temporarily boosting LDO current limits or adjusting clock duty cycles - to meet peak sensor demand during frame exposure. This direct hardware handshake improves power efficiency and timing predictability in TPS68470YFFT-based CCM implementations.