Texas Instruments TPS68470YFFR

Overview

TPS68470YFFR from Texas Instruments is a highly integrated power management unit (PMU) designed specifically for compact camera modules (CCMs), combining a 500-mA buck converter, dual 1-A flash LED drivers with temperature monitoring and open/short detection, five programmable LDOs (including VCM, analog, IO, sensor IO, and auxiliary rails), and a PLL-based clock generator with crystal oscillator support. It powers world-facing and user-facing cameras in smartphones and tablets while delivering reference clocks to image sensors.

For engineers reviewing the TPS68470YFFR datasheet, TPS68470YFFR pinout, TPS68470YFFR application, or TPS68470YFFR equivalent, this device is evaluated for CCM power rail consolidation, flash timing control, sensor clock synchronization, thermal-aware LED current regulation, and I²C-configurable multi-rail sequencing in space-constrained mobile imaging systems.

Technical Context

The TPS68470YFFR 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) driving two low-side 1-A LED current sinks with adaptive voltage regulation based on LED forward voltage. Its clock subsystem includes a 3–27 MHz crystal oscillator and a programmable PLL generating HCLK_A/HCLK_B outputs (3.8–64.2 MHz) with <600 ps cycle-to-cycle jitter.

Five independent LDOs-LDO_ANA (200 mA, 0.875–3.1 V), LDO_VCM (500 mA, 0.875–3.1 V), LDO_IO (50 mA, ≥1.6 V min), LDO_S_IO (150 mA, 0.875–3.1 V), and LDO_AUX1/AUX2 (150/80 mA, 0.875–3.1 V)-are digitally programmable via I²C using 17.8-mV steps and feature short-circuit protection, thermal shutdown (140–160 °C trip), and controlled ramp-up/down. All rails support dynamic voltage scaling and independent enable/disable control.

Key Specifications

Pinout & Package

TPS68470YFFR uses a 56-pin DSBGA (YFF) package measuring 3.325 mm × 2.930 mm with 0.625 mm profile, designed for high-density camera module integration. Pin functions are defined per TI SLVSCJ1B datasheet Rev B (Jan 2017).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS68470YFFR, TPS68480YFFR offers higher clock frequency and VCM current in identical packaging, while MAX20049ATPA/VY+ trades clock integration for wider VIN and safety features-making TPS68470YFFR optimal for cost-sensitive, space-constrained mobile CCMs needing full clock+power+flash integration.

Availability

TPS68470YFFR is available at Aetrix Electronics and suitable for smartphone camera modules, tablet imaging subsystems, and compact camera module reference designs requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.

Supply support for TPS68470YFFR 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 experience in mobile and imaging power solutions.

The TPS68470YFFR belongs to TI's Compact Camera Module PMU product line, engineered to consolidate power, clock, and flash functions into a single ultra-thin package for space-constrained mobile imaging applications.

FAQ

What is the maximum output current capability of the TPS68470YFFR buck converter?

The TPS68470YFFR buck converter delivers up to 500 mA continuous output current to the image sensor digital core. It features a 180-mΩ high-side and 150-mΩ low-side MOSFET, 3–6 MHz switching frequency, and internal discharge resistor (190–375 Ω) for controlled power-down sequencing. This rating is validated across 0°C to 85°C ambient with proper thermal layout per TI SLVSCJ1B.

How does the TPS68470YFFR support LED temperature monitoring for flash safety?

The TPS68470YFFR monitors LED temperature via the WLED_NTC pin (C2), which sources a precise 23.8-µA bias current into an external NTC thermistor. The device compares resulting voltage against two thresholds: 0.92–1.19 V (LEDWARN flag) and 0.29–0.40 V (LEDHOT flag), enabling firmware to throttle or disable flash before thermal damage occurs. This function operates independently of I²C control.

Can the TPS68470YFFR generate clocks for two different image sensors simultaneously?

Yes, the TPS68470YFFR provides two independent, programmable clock outputs-HCLK_A (D5) and HCLK_B (C5)-each configurable from 3.8 MHz to 64.2 MHz with <600 ps cycle-to-cycle jitter. Both outputs derive from the same PLL but support separate post-dividers and drive strengths, allowing asynchronous or phase-aligned timing for dual-sensor systems such as stereo or time-of-flight configurations.

What are the minimum and maximum output voltage ranges for the LDOs in the TPS68470YFFR?

All five LDOs in the TPS68470YFFR (LDO_ANA, LDO_VCM, LDO_IO, LDO_S_IO, LDO_AUX1/AUX2) are programmable from 0.875 V to 3.1 V in precise 17.8-mV steps via I²C voltage adjustment registers. LDO_IO has a hard minimum of 1.6 V to ensure I²C functionality, while LDO_VCM supports up to 500 mA load current at any setting within the range.

Does the TPS68470YFFR support daisy-chained I²C communication with image sensors?

Yes, the TPS68470YFFR supports I²C daisy-chaining through GPIO1 (D6) and GPIO2 (F6), which can be configured as sensor SDA and SCL pass-gates with 25-Ω on-resistance. This allows the host processor to access downstream sensors over a shared I²C bus without additional level shifters or multiplexers, reducing interconnect complexity in multi-sensor modules.