Texas Instruments TPS60202DGS

Overview

TPS60202DGS from Texas Instruments is a regulated 3.3 V, 50 mA charge pump DC/DC converter for battery-powered systems operating from 1.6 V to 3.6 V input. It uses push-pull topology with two flying capacitors to achieve <5 mV_PP output ripple and integrates a low-battery detector with 1.18 V threshold on LBI/LBO pins. It targets space-constrained portable instrumentation and medical devices requiring stable 3.3 V rail from two-cell alkaline/NiMH sources.

For engineers reviewing the TPS60202DGS datasheet, TPS60202DGS pinout, TPS60202DGS application, or TPS60202DGS equivalent, key selection considerations include its 50 mA continuous output current (vs. 100 mA in TPS60200), integrated low-battery warning function, MSOP-10 package footprint, and capacitor-based inductorless design enabling ultra-low EMI in handheld glucose meters and audio players.

Technical Context

The TPS60202DGS implements dual single-ended charge pumps operating in 180° phase-shifted push-pull mode to sustain near-constant output current and minimize ripple. Its regulation uses pulse-skip mode below 7 mA load and constant-frequency mode above that threshold, with internal 1.18 V reference and error amplifier controlling MOSFET r_DS(ON) for precise 3.3 V ±4% output.

It features auto-discharge of the output capacitor during shutdown (discharge time <0.6 ms), 0.05 µA shutdown current, and EN pin programmability for internal oscillator operation or external clock synchronization up to 800 kHz. The low-battery comparator activates LBO when LBI voltage falls below 1.18 V ±4%, with 10 mV hysteresis and <50 nA input bias current.

Key Specifications

Pinout & Package

TPS60202DGS is housed in a 10-pin MSOP package (3.00 mm × 3.00 mm body size) with exposed pad for thermal performance. Pin numbering follows standard top-view orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS60202DGS, TPS60200DGS provides double the output current in identical form factor but shares the same low-battery detection capability, while TPS60122DGS trades pin compatibility for enhanced efficiency and thermal performance-making it suitable only when redesigning the power section is acceptable.

Availability

TPS60202DGS is available at Aetrix Electronics and suitable for glucose meters, handheld instrumentation, MP3 audio players, battery-powered microprocessor systems, and portable medical devices requiring stable component supply with long-term lifecycle support.

Supply support for TPS60202DGS 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 and embedded processing technologies, with decades of expertise in power management ICs for portable and industrial applications.

The TPS6020x product line was designed specifically for space-constrained, battery-operated systems requiring clean, regulated 3.3 V from low-input-voltage sources-emphasizing ultra-low EMI, minimal external components, and intelligent power monitoring.

FAQ

What is the maximum continuous output current of the TPS60202DGS?

The TPS60202DGS delivers a maximum continuous output current of 50 mA when supplied from a 2 V input, as confirmed in the Electrical Characteristics table (Section 7.5) of the SLVS274A datasheet. This rating applies across the full operating temperature range (–40°C to 85°C) and is distinct from the 100 mA capability of the TPS60200DGS variant. Output current decreases slightly at lower input voltages, with guaranteed minimums specified per test condition.

Does the TPS60202DGS include a power-good output?

No, the TPS60202DGS does not include a power-good (PG) output. It features a low-battery detector with LBI and open-drain LBO pins, as confirmed in Device Comparison Table 1 and Pin Functions documentation. The PG output is exclusive to TPS60201DGS and TPS60203DGS variants. Using TPS60202DGS in a design requiring power-good signaling would necessitate external circuitry or part substitution.

What external capacitors are required for basic operation of the TPS60202DGS?

The TPS60202DGS requires exactly four external ceramic capacitors: one 2.2 µF input capacitor (Ci), two 1 µF flying capacitors (C1 and C2), and one 2.2 µF output capacitor (Co). All must be X5R or X7R dielectric types per Section 9.1.1 and Table 3 of the datasheet. These values ensure compliance with recommended operating conditions, including <5 mV_PP ripple and stable regulation at 50 mA load.

How does the TPS60202DGS handle shutdown and output discharge?

When the EN pin is driven low, the TPS60202DGS enters shutdown mode with 0.05 µA supply current and isolates the input from the output. Crucially, an internal auto-discharge transistor actively drains the output capacitor, reducing V_OUT to <0.5 V within 0.6 ms. This behavior-documented in Section 7.5 Electrical Characteristics-is essential for safe system power-down in medical and portable equipment where residual voltage could cause malfunction or safety hazards.

Can the TPS60202DGS be synchronized to an external clock signal?

Yes, the TPS60202DGS supports external clock synchronization via the EN pin, accepting signals from 400 kHz to 800 kHz (Section 7.5, f_SYNC). In sync mode, the internal switching frequency becomes half the external clock frequency. This capability allows designers to eliminate beat frequencies in sensitive analog sections (e.g., audio codecs or precision ADCs) and align power conversion timing with system clocks-without modifying the TPS60202DGS schematic or layout.