STMicroelectronics SPV1040TTR

Overview

SPV1040TTR from STMicroelectronics is a monolithic, low-voltage, solar-optimized step-up DC-DC converter with 0.3 V to 5.5 V input range, embedded perturb-and-observe MPPT algorithm, 100 kHz fixed PWM frequency, 120 mΩ N-channel power switch, and 140 mΩ P-channel synchronous rectifier - designed for battery charging in ultra-low-input solar energy harvesting systems such as portable medical sensors and GPS trackers.

For engineers reviewing the SPV1040TTR datasheet, SPV1040TTR pinout, SPV1040TTR application, or SPV1040TTR equivalent, this device delivers verified constant-voltage/constant-current regulation, reverse-polarity protection, thermal shutdown at 155 °C, and soft-start behavior critical for deeply discharged battery recovery in solar-powered edge devices.

Technical Context

The SPV1040TTR implements a voltage-mode boost topology with integrated N-channel high-side switch and P-channel synchronous rectifier, enabling operation down to 0.3 V input while maintaining up to 95% efficiency across 1.5–2.5 V input ranges. Its analog control core monitors MPP-SET (PV voltage), VCTRL (battery voltage feedback), and ICTRL± (current sense) to execute real-time MPPT tracking without external microcontroller intervention.

MPPT operation relies on a digital perturb-and-observe engine that dynamically adjusts PWM duty cycle based on incremental changes in PV source power, while independent analog loops enforce 1.25 V internal reference-based voltage regulation and ±50 mV current-sense offset-controlled current limiting - all coordinated under burst mode and sleep-in transitions below 450 mV MPP-SET.

Key Specifications

Pinout & Package

TSSOP8 package (3.0 × 4.4 mm, 1.2 mm height), RoHS-compliant ECOPACK® grade, with exposed pad for thermal enhancement (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar solar-optimized boost converter applications.

Compared with MAX17222 and TPS61200, SPV1040TTR uniquely integrates autonomous MPPT, reverse-polarity blocking, and dual-loop CV/CC regulation in a single TSSOP8 package - eliminating BOM overhead and firmware dependency for solar energy harvesting in space-constrained portable electronics.

Availability

SPV1040TTR is available at Aetrix Electronics and suitable for solar-powered GPS systems, portable medical sensors, and wireless headset charging cases requiring stable component supply with guaranteed long-term manufacturability and RoHS-compliant packaging.

Supply support for SPV1040TTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The SPV1040 belongs to ST's Energy Harvesting & Solar Power Management product line, engineered specifically for autonomous, maintenance-free power conversion in ultra-low-input renewable energy systems.

FAQ

What is the minimum input voltage required for SPV1040TTR to initiate soft-start?

The SPV1040TTR begins soft-start when the MPP-SET voltage rises above 0.24 V (UVLO turn-on threshold), corresponding to approximately 0.3 V input from a typical solar cell under low-light conditions. During soft-start, it uses the intrinsic body diode of the P-channel rectifier to charge the output capacitor until V_OUT reaches 0.8 V, at which point normal PWM operation begins.

How does the SPV1040TTR implement MPPT without external components?

The SPV1040TTR embeds a digital perturb-and-observe engine within its analog-digital hybrid core. It samples MPP-SET (PV voltage) and calculates instantaneous power changes by correlating small duty-cycle perturbations with resulting voltage/current trends - all executed autonomously using internal comparators, DACs, and state machines without MCU involvement or external sensors.

Can SPV1040TTR regulate both voltage and current simultaneously?

Yes - SPV1040TTR employs two independent analog control loops: a voltage regulation loop (via VCTRL pin and internal 1.25 V reference) and a current regulation loop (via ICTRL± pins and 50 mV sense offset). When both thresholds are active, the device operates in constant-current mode until battery voltage reaches the CV setpoint, then transitions smoothly to constant-voltage mode.

Is external Schottky diode mandatory for 5.2 V output operation?

A Schottky diode between LX and VOUT is required only if V_OUT exceeds 4.8 V - the absolute maximum rating for V_OUT. At 5.2 V, the diode bypasses the PMOS body diode (0.7 V drop) with a 0.3 V forward drop, preventing excessive power loss and thermal stress. For outputs ≤4.8 V, the diode is optional and unused.