Texas Instruments TPS61001DGS

Overview

TPS61001DGS from Texas Instruments is a fixed-output 1.8 V, non-synchronous boost converter for single- or dual-cell battery systems. It delivers up to 100 mA from 0.8 V input, starts up into full load at 0.9 V, achieves up to 90% efficiency, and integrates low-battery detection with LBI/LBO pins - used in portable medical diagnostics and wireless headsets.

For engineers reviewing the TPS61001DGS datasheet, TPS61001DGS pinout, TPS61001DGS application, or TPS61001DGS equivalent, key selection criteria include minimum start-up voltage (0.9 V), fixed 1.8 V output accuracy (±3%), quiescent current (<50 µA), and compatibility with 33 µH inductors and ceramic output capacitors.

Technical Context

The TPS61001DGS implements a fixed-frequency (500 kHz) current-mode PWM controller with automatic transition into power-save mode below light loads to sustain high efficiency. Its integrated antiringing switch clamps SW-node ringing during discontinuous conduction mode, reducing EMI without external snubbers.

It features undervoltage lockout (~0.7 V), internal 500 mV LBI threshold with 10 mV hysteresis, and shutdown current of 0.2–5 µA. The FB pin is unconnected (NC) in fixed-output versions like TPS61001DGS, distinguishing it from adjustable variants.

Key Specifications

Pinout & Package

TPS61001DGS is housed in a 10-pin VSSOP (DGS) package measuring 3.00 mm × 3.00 mm, optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61001DGS, TPS61022DRVR offers higher current and efficiency above 2.5 V input but cannot start below 0.7 V; MAX1703EUT+T matches output current and frequency but omits integrated battery monitoring and uses a different package with no NC/FBGND pin.

Availability

TPS61001DGS is available at Aetrix Electronics and suitable for wireless headsets, portable medical diagnostics, and remote controls requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS61001DGS 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 and embedded processing solutions, with over 90 years of innovation in power management ICs.

The TPS6100x family was designed specifically for ultra-low-voltage battery-powered portable electronics, emphasizing start-up reliability, integrated protection, and minimal external component count.

FAQ

What is the minimum input voltage required for TPS61001DGS to start up under load?

The TPS61001DGS starts up into a full load at 0.9 V across the full temperature range (–40°C to 85°C). Once running, it continues operation down to 0.8 V input. This specification is verified per TI SLVS279D datasheet Section 7.5, ensuring reliable boot from deeply discharged single-cell batteries. The TPS61001DGS maintains regulation throughout this range without external intervention.

Does TPS61001DGS require external feedback resistors to set its output voltage?

No, the TPS61001DGS has a factory-trimmed internal resistor divider that fixes the output at 1.8 V. The FB pin is left unconnected (NC) per datasheet Section 6 - unlike TPS61000/TPS61007, which use external resistors. This eliminates tuning error and reduces BOM count. The TPS61001DGS achieves ±3% output accuracy over line, load, and temperature without user adjustment.

How does the low-battery detection function work on TPS61001DGS?

The TPS61001DGS uses dedicated LBI and LBO pins: LBI accepts a scaled battery voltage, and when it falls below 500 mV ±15 mV, LBO pulls low (open-drain). A pull-up resistor to VOUT is required. If unused, LBI must be tied to GND - never left floating. This function is active only when EN = high. The TPS61001DGS integrates this comparator to avoid adding discrete components while providing deterministic battery flagging.

What inductor value is recommended for TPS61001DGS in typical applications?

TI specifies a 33 µH inductor (e.g., Coilcraft DO3308P−333) for the TPS61001DGS in standard configurations. This value balances peak current handling (1100 mA switch limit), efficiency (>85% at 50 mA), and physical size. Inductor saturation current must exceed 1.1 A to prevent core saturation under worst-case conditions. The TPS61001DGS datasheet Table 7.3 lists 10–33 µH as the validated range, with 33 µH delivering optimal trade-offs for 1.8 V output.

Is TPS61001DGS compatible with ceramic output capacitors?

Yes, the TPS61001DGS is fully compatible with ceramic output capacitors. TI recommends ≥22 µF X5R/X7R ceramic at the VOUT pin (Section 7.3), and the device's compensation design accounts for low-ESR ceramics. This eliminates electrolytic capacitors, improves reliability, and reduces footprint. The TPS61001DGS maintains stability and transient response with ceramic caps due to its internal compensation architecture and antiringing switch.