Texas Instruments TPS65530ARSLT

Overview

TPS65530ARSLT from Texas Instruments is a fully integrated 8-channel DC/DC converter optimized for digital still cameras (DSCs), featuring synchronous buck (CH1/CH3), buck-boost (CH2/CH4), boost (CH5/CH7/CH8), and inverting (CH6) topologies - with integrated power MOSFETs on all channels except CH8. It delivers up to 600 mA on CH1/CH2, supports 1.5 MHz (CH1–CH4) and 750 kHz (CH5–CH8) switching frequencies, and operates across 1.5 V to 5.5 V input.

For engineers reviewing the TPS65530ARSLT datasheet, TPS65530ARSLT pinout, TPS65530ARSLT application, or TPS65530ARSLT equivalent, this device enables compact, sequenced multi-rail power delivery for image sensor subsystems, LED backlighting, CCD biasing, and motor/IC drive supplies - with integrated soft-start, UVLO, thermal shutdown, OVP, and OCP protection.

Technical Context

The TPS65530ARSLT implements channel-specific control architectures: CH1/CH3 use voltage-mode synchronous buck regulation with 100% duty-cycle capability and internal discharge paths; CH2/CH4 employ average-current-mode synchronous buck-boost with H-bridge coil configuration and single-inductor support. CH5/CH6 provide nonsynchronous boost and inverting outputs for CCD+ and CCD− rails, while CH7 delivers constant-current white LED backlighting with brightness adjustment via B-ADJ pin.

Power sequencing is hardware-controlled: CH1/CH2/CH3/CH8/REF follow a fixed startup order synchronized to XSLEEP, while CH5/CH6 enable/disable based on SEQ56 logic level and share S/S56 soft-start timing. CH4 and CH7 operate independently but are subordinate to CH1–CH3 to prevent functional conflict during ramp-up.

Key Specifications

Pinout & Package

TPS65530ARSLT uses a thermally enhanced 48-pin QFN package (6 mm × 6 mm, 0.4 mm pitch) with exposed PowerPAD™ on the underside for PCB-level heat sinking. The package requires soldering the PowerPAD™ to PGND via ≥12 Φ0.3-mm thermal vias to achieve R_θJA = 27°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-channel power management applications.

Compared with TPS65530ARSLT, the TPS65531ARSLT offers tighter CH7 current regulation and higher CH2/CH4 output voltage ceiling, while the TPS65532ARSLT improves low-battery CCD bias stability and CH8 wake-up reliability - both retain identical sequencing logic, pinout, and thermal design requirements.

Availability

TPS65530ARSLT is available at Aetrix Electronics and suitable for digital still camera manufacturing, portable imaging equipment, and CCD-based optical sensor modules requiring stable component supply and long-term production continuity.

Supply support for TPS65530ARSLT 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 ICs, with decades of expertise in battery-powered portable electronics.

The TPS65530A product line was designed specifically for digital still camera power architectures - integrating sequenced multi-topology DC/DC conversion, LED backlight control, and CCD bias generation into a single QFN package.

FAQ

What is the maximum output current supported by TPS65530ARSLT on its CH1 and CH2 channels?

TPS65530ARSLT supports up to 600 mA continuous output current on both CH1 (buck, engine core) and CH2 (buck-boost, DSP I/F), verified under recommended operating conditions (VCC2 = 3.6 V, TJ ≤ 85°C). This rating assumes proper thermal design with the PowerPAD™ soldered to PGND and adequate PCB copper area.

Does TPS65530ARSLT include integrated MOSFETs for all eight channels?

No - TPS65530ARSLT integrates power MOSFETs for CH1 through CH7, but CH8 requires external high-side and low-side FETs driven by SW8HD, SW8LD, and LL8 pins. This architecture allows scalable current delivery beyond internal limits and supports motor/actuator loads that exceed monolithic switch capabilities.

How does the power-on sequencing work for CH5 and CH6 in TPS65530ARSLT?

TPS65530ARSLT enables CH5/CH6 sequencing via the SEQ56 pin: when SEQ56 = AGND, CH5 starts before CH6; when SEQ56 = VCC2, both channels start simultaneously. Startup timing is controlled by S/S56 capacitor value (TS/S56 = CS/S56 × 6.25 ms), and enable is managed by EN56 pin logic level.

Can TPS65530ARSLT be used outside digital still camera applications?

While optimized for DSCs, TPS65530ARSLT is technically usable in other portable imaging systems requiring sequenced multi-rail power - such as medical endoscopes or industrial inspection cameras - provided input voltage (1.5–5.5 V), temperature range (–25°C to 85°C), and channel topology requirements align. It is not qualified for automotive or extended-temperature industrial use.

What protection features are implemented per channel in TPS65530ARSLT?

TPS65530ARSLT provides per-channel overvoltage protection (OVP) sensed at each FBx pin, overcurrent protection (OCP) with latch-off behavior for CH1–CH6 and CH7, and thermal shutdown (TSD) affecting all channels. CH8 uses forced MOSFET OFF instead of latch-off during OCP, and UVLO monitors VCC2 globally with 150 mV hysteresis.