Texas Instruments TPS650003RTER

Overview

TPS650003RTER from Texas Instruments is a highly integrated power management IC (PMIC) for portable electronics, combining a 600-mA step-down converter, two fixed-output LDO regulators (VLDO1 = 1.8 V, VLDO2 = 3.3 V), spread-spectrum clocking, and internal reference circuitry in a single 3-mm × 3-mm WQFN-16 package. It operates from 2.3 V to 6 V input, delivers up to 300 mA per LDO, and supports automatic PFM/PWM mode transition for high efficiency across light-to-heavy loads - ideal for embedded processor core and I/O rail power in smartphones and PDAs.

For engineers reviewing the TPS650003RTER datasheet, TPS650003RTER pinout, TPS650003RTER application, or TPS650003RTER equivalent, key selection criteria include its fixed dual-LDO outputs, 2.25-MHz switching frequency with EMI-reducing SSC, 16-pin WQFN thermal performance (RθJA = 44.7°C/W), and compatibility with standard 2.2-μH inductors and 10-μF output capacitors in compact point-of-load designs.

Technical Context

The TPS650003RTER implements a synchronous buck converter with internal high-side/low-side MOSFETs (RDS(on) = 240 mΩ / 185 mΩ), feedback-controlled via FB_DCDC pin referencing a 0.6-V internal bandgap (±1.5% accuracy in PWM mode). Its MODE pin selects between forced PWM (high) or auto PFM/PWM (low), enabling dynamic efficiency optimization. The device uses a 2.25-MHz oscillator with spread-spectrum modulation to reduce conducted EMI without external components.

Two independent LDOs - VLDO1 (1.8 V, 300 mA) and VLDO2 (3.3 V, 300 mA) - feature separate enable inputs (EN_LDO1/EN_LDO2), dedicated input pins (VINLDO1/VINLDO2), and 370-mV dropout at 250 mA. Power-good monitoring (PG) asserts open-drain low only when all enabled rails are in regulation, supporting safe system sequencing.

Key Specifications

Pinout & Package

TPS650003RTER is housed in a 3.00 mm × 3.00 mm, 16-pin WQFN package (RTE) with exposed thermal pad for enhanced heat dissipation. Pin numbering follows top-view orientation with pin 1 marked by dot or notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS650003RTER, TPS650001RTER provides different fixed-voltage combinations optimized for legacy 1.2-V core architectures, while TPS650006RTER offers identical integration and packaging but targets 1.2-V DC-DC applications - both retain the same 16-pin WQFN thermal performance and enable/control logic.

Availability

TPS650003RTER is available at Aetrix Electronics and suitable for smartphone power delivery, embedded processor board design, and portable media player development requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS650003RTER 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The TPS6500x family was designed specifically for space-constrained portable electronics, integrating buck conversion, dual LDOs, and power sequencing in minimal footprint - targeting smartphones, PDAs, and handheld computing devices with stringent efficiency and EMI requirements.

FAQ

What output voltages does the TPS650003RTER provide?

The TPS650003RTER provides three regulated outputs: a programmable step-down converter (typically configured for 1.5 V), plus two fixed-output LDOs - VLDO1 = 1.8 V and VLDO2 = 3.3 V. Both LDOs deliver up to 300 mA each with ±3.5% output voltage accuracy over temperature and load. The DC-DC output is set externally via FB_DCDC and a resistor divider referenced to the 0.6-V internal bandgap.

Does the TPS650003RTER include a supply voltage supervisor (SVS)?

No, the TPS650003RTER does not include a supply voltage supervisor. The SVS function - including RST, MR, TRST, and RSTSNS pins - is exclusive to the TPS65001 and TPS650061 variants. The TPS650003RTER belongs to the TPS65000 spin family and shares the 16-pin WQFN package and core power functions but omits the supervisor block.

What is the recommended inductor value for the TPS650003RTER step-down converter?

The recommended inductor value for the TPS650003RTER step-down converter is 2.2 μH, with typical range 1.5 μH to 3.3 μH. This value balances size, efficiency, and transient response at the nominal 2.25-MHz switching frequency. TI specifies 2.2 μH in all typical application schematics and characterizes electrical performance (e.g., efficiency, ripple) using this value with 10-μF output capacitance.

How does the MODE pin affect TPS650003RTER operation?

The MODE pin on the TPS650003RTER selects between two operating modes: when pulled high, it forces continuous PWM operation for constant-frequency, low-noise performance; when pulled low, it enables automatic PFM/PWM transition to maximize light-load efficiency. In PFM mode, quiescent current drops to 23–32 μA, making it ideal for battery standby, while PWM mode ensures predictable EMI behavior during active processing.

Can the TPS650003RTER LDOs be powered from sources other than the DC-DC output?

Yes, the TPS650003RTER LDOs support independent input sourcing: VINLDO1 and VINLDO2 accept 1.6 V to 6 V and may be connected to the DC-DC output, a separate battery rail, or a secondary power source. This enables flexible power sequencing - for example, powering VLDO2 (3.3 V) from a main battery while deriving VLDO1 (1.8 V) from the regulated DC-DC output - without requiring external diodes or switches.