Texas Instruments TPS61032PWPG4

Overview

TPS61032PWPG4 from Texas Instruments is a synchronous boost DC-DC converter IC designed for battery-powered portable systems. It delivers up to 1000 mA output current at 5 V from a 1.8–5.5 V input, features 96% peak efficiency, 600 kHz fixed-frequency PWM operation, and integrated low-battery comparator with LBI/LBO pins. It is used in MP3 players, PDAs, and other single-cell Li-ion or dual-cell alkaline/NiMH powered devices.

For engineers reviewing the TPS61032PWPG4 datasheet, TPS61032PWPG4 pinout, TPS61032PWPG4 application, or TPS61032PWPG4 equivalent, key selection considerations include its adjustable output voltage capability (via FB pin), 4 A switch current limit, Power Save mode for light-load efficiency, load disconnect during shutdown, and QFN-16 package thermal performance (RθJA = 35.5°C/W).

Technical Context

The TPS61032PWPG4 implements a fixed-frequency, multiple feedforward PWM controller with synchronous rectification using integrated N-channel and P-channel MOSFETs. Input voltage, output voltage, and NMOS switch voltage drop are monitored directly to adjust duty cycle, reducing reliance on slow error-amplifier loop response.

It integrates a low-battery detector with 500 mV threshold at LBI and open-drain LBO output, antiringing circuitry to suppress SW-node ringing in discontinuous conduction mode, and undervoltage lockout (~1.6 V) to prevent malfunction during deep discharge.

Key Specifications

Pinout & Package

TPS61032PWPG4 is housed in a thermally enhanced 4 mm × 4 mm QFN-16 package with exposed PowerPAD™ (pin 16), requiring PCB soldering to PGND for optimal thermal dissipation (RθJC(bot) = 3.8°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous boost converter applications.

Compared with TPS61030PWPR and TPS61291DRVR, the TPS61032PWPG4 uniquely combines adjustable output voltage, integrated low-battery detection with open-drain flag, and 1 A capability in a thermally optimized QFN - making it the only choice among the three for designs requiring programmable rail voltage and battery state awareness.

Availability

TPS61032PWPG4 is available at Aetrix Electronics and suitable for portable medical devices, handheld industrial scanners, and wireless IoT endpoints requiring stable component supply across multi-year production cycles.

Supply support for TPS61032PWPG4 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 high-efficiency DC-DC conversion.

The TPS6103x family was engineered specifically for portable battery-powered equipment - delivering high efficiency across wide input ranges, robust protection features, and compact packaging for space-constrained consumer and industrial designs.

FAQ

What is the maximum output current capability of the TPS61032PWPG4?

The TPS61032PWPG4 delivers up to 1000 mA output current at 5 V when supplied from ≥2.4 V input, with peak switch current limited to 4000 mA. Actual achievable current depends on input voltage, output voltage, ambient temperature, and PCB thermal design - at 1.8 V input, maximum output current drops to ~600 mA due to duty-cycle constraints. The TPS61032PWPG4 datasheet provides detailed VI curves in Figure 2.

Does the TPS61032PWPG4 support adjustable output voltage?

Yes, the TPS61032PWPG4 supports adjustable output voltage via the FB pin, which references an internal 500 mV precision bandgap. Using an external resistor divider (e.g., R3 = 1 MΩ, R4 = 200 kΩ), outputs from 1.8 V to 5.5 V can be programmed. This differs from the fixed-output TPS61030 (3.3 V) and TPS61031 (5 V) variants in the same family.

How does the low-battery detection work on the TPS61032PWPG4?

The TPS61032PWPG4 uses the LBI pin to monitor a scaled-down battery voltage via external resistor divider. When the voltage at LBI falls below 500 mV (with 10 mV hysteresis), the open-drain LBO pin pulls low. This function is active only when EN = high. If unused, LBI must be tied to GND or VBAT - floating is prohibited. The TPS61032PWPG4 does not include a built-in voltage reference for LBI; external scaling is mandatory.

Can the TPS61032PWPG4 be synchronized to an external clock?

Yes, the TPS61032PWPG4 accepts an external clock signal on the SYNC pin to force operation at a specific frequency between 500 kHz and 700 kHz. The external clock must have 30–70% duty cycle and amplitude compatible with VBAT logic levels. When SYNC is pulled high, Power Save mode is disabled and fixed-frequency PWM resumes at ~600 kHz. This capability enables EMI reduction by aligning switching edges with system timing domains.

What thermal considerations apply to the TPS61032PWPG4 in QFN-16 package?

The TPS61032PWPG4 in PWP (QFN-16) package has RθJA = 35.5°C/W and RθJC(bot) = 3.8°C/W. To maintain TJ ≤ 125°C, the exposed PowerPAD™ (Pin 16) must be soldered to a minimum 200 mm² copper area connected to PGND. Thermal vias (≥6×0.3 mm) beneath the pad are strongly recommended. Without proper thermal relief, continuous 1 A output at high ambient temperatures may trigger overtemperature shutdown.