Texas Instruments TPS60205DGSRG4

Overview

TPS60205DGSRG4 from Texas Instruments is a regulated 3.3-V, 100-mA charge pump DC/DC converter optimized for battery-powered systems. It operates from 1.6 V to 3.6 V input, delivers <5 mV_PP output ripple via push-pull topology, integrates a power-good (PG) detector, and achieves up to 90% efficiency with only four external ceramic capacitors - used in handheld medical devices like glucose meters requiring stable low-noise 3.3-V rail generation.

For engineers reviewing the TPS60205DGSRG4 datasheet, TPS60205DGSRG4 pinout, TPS60205DGSRG4 application, or TPS60205DGSRG4 equivalent, key selection criteria include its PG output functionality (vs. LBO in TPS60204), 35-μA quiescent current, 0.05-μA shutdown current, LinSkip mode operation, and MSOP-10 package compatibility with space-constrained portable instrumentation.

Technical Context

The TPS60205DGSRG4 implements a dual single-ended charge pump in 180° push-pull phase alignment to sustain continuous output current delivery and minimize voltage ripple. Its regulation uses a combination of constant-frequency linear control above 7 mA load and pulse-skip mode below that threshold, maintaining ±4% output accuracy across 1.6–3.6 V input range.

It features an open-drain power-good (PG) output that asserts high when OUT reaches ≥90% of 3.3 V (i.e., ≥2.97 V), with hysteresis of 1% of nominal output. The EN pin supports three modes: shutdown (EN = low), internal oscillator (EN = high), or external clock synchronization (EN driven at 400–800 kHz).

Key Specifications

Pinout & Package

TPS60205DGSRG4 is housed in a 10-pin MSOP (DGS) package (3.05 mm × 4.98 mm), thermally enhanced for compact battery-powered layouts. Pin functions are validated per TI SLVS354B Rev. May 2023.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar regulated charge pump DC/DC converter applications.

Compared with TPS60205DGSRG4, TPS60204DGSR offers identical performance except for detector type (LBO vs. PG), making it a direct functional alternative where battery warning suffices. TPS60123DGSR trades ultra-low quiescent current and compact size for higher output capability - appropriate only when load demands exceed 100 mA.

Availability

TPS60205DGSRG4 is available at Aetrix Electronics and suitable for glucose meters, portable audio players, handheld instrumentation, and backup-battery boost converters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TPS60205DGSRG4 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-efficient power conversion.

The TPS6020x family was designed specifically for space-constrained, low-noise, battery-powered applications - delivering regulated 3.3-V rails without inductors while integrating intelligent supervision (PG or LBO) and adaptive efficiency modes.

FAQ

What is the power-good (PG) threshold voltage for TPS60205DGSRG4?

The TPS60205DGSRG4 asserts its open-drain PG output high when the regulated output voltage reaches ≥90% of nominal 3.3 V - i.e., ≥2.97 V - with 1% hysteresis. This threshold is factory-trimmed and does not require external resistor programming. During startup, PG remains invalid for the first 500 µs, and the pin is high-impedance in shutdown mode. A pullup resistor (100 kΩ–1 MΩ) to OUT or another ≤3.6 V rail is mandatory for proper logic-level signaling.

Can TPS60205DGSRG4 operate from a single 1.5-V alkaline cell?

No, TPS60205DGSRG4 requires a minimum input voltage of 1.6 V to start and sustain regulation, and its guaranteed 100-mA output performance begins at ≥2 V input. A single fresh alkaline cell starts at ~1.6 V but drops rapidly under load; therefore, the device is specified for two-cell alkaline/NiMH/NiCd configurations (2.4–3.0 V nominal). Operation below 1.6 V may result in unregulated output or failure to start.

How does the LinSkip mode improve efficiency in TPS60205DGSRG4?

TPS60205DGSRG4 enters LinSkip mode automatically when output current falls below ~7 mA. In this mode, the error amplifier disables switching cycles until output voltage droops below 3.3 V, reducing average switching losses and cutting quiescent current to 35 μA. Unlike basic pulse-skip, LinSkip maintains MOSFET gate control to limit per-cycle energy transfer - preserving low ripple (<20 mV_PP) even at light loads - while achieving >85% efficiency at 1 mA.

What external capacitors are required for TPS60205DGSRG4?

TPS60205DGSRG4 requires exactly four external ceramic capacitors: two 1-μF flying capacitors (C1, C2), one 2.2-μF input capacitor (Ci), and one 2.2-μF output capacitor (Co). All must be X5R or X7R dielectric, 0805 or larger, with ESR <0.1 Ω. Using smaller values reduces max output current and increases ripple; Z5U/Y5V types are prohibited due to capacitance loss over temperature/voltage.

Is TPS60205DGSRG4 pin-compatible with TPS60204DGSR?

Yes, TPS60205DGSRG4 is pin-compatible with TPS60204DGSR in the MSOP-10 (DGS) package. Both share identical pin assignments, electrical specifications, and thermal characteristics. The sole functional difference is detector type: TPS60205DGSRG4 uses PG (pin 6), while TPS60204DGSR uses LBO (pin 6) and requires LBI (pin 1) configuration. Pin 1 must be tied to GND for TPS60205DGSRG4 operation.