Texas Instruments TPS60310DGSG4

Overview

TPS60310DGSG4 from Texas Instruments is a dual-output, regulated charge pump DC/DC converter optimized for single-cell alkaline/NiCd/NiMH battery operation (0.9 V–1.8 V input). It delivers 2×VIN on OUT1 (up to 40 mA) and regulated 3.3 V ±4% on OUT2 (up to 20 mA), with snooze mode enabling <2 µA quiescent current. It targets ultra-low-power portable medical instruments like hearing aids and smart card readers where inductor-free, low-EMI 3.3-V bias generation is critical.

For engineers reviewing the TPS60310DGSG4 datasheet, TPS60310DGSG4 pinout, TPS60310DGSG4 application, or TPS60310DGSG4 equivalent, key selection criteria include its open-drain power-good output, 10-pin MSOP package footprint, dual-output voltage configuration (2×VIN + 3.3 V), snooze-mode efficiency at microamp loads, and compatibility with five 1-µF ceramic capacitors only.

Technical Context

The TPS60310DGSG4 integrates two independent charge pump stages: CP1 operates as a voltage doubler delivering unregulated 2×VIN on OUT1, while CP2 functions as a regulated 1.5×/2× charge pump with internal error amplifier and 3.3-V reference to maintain ±4% regulation on OUT2 across 0.9–1.8 V input and 0–20 mA load. Its automatic mode selection (3× or 4× conversion) optimizes efficiency over wide input ranges.

Snooze mode is enabled via the SNOOZE pin and reduces quiescent current to ≤2 µA by disabling the high-accuracy error amplifier and engaging a lower-power 10%-tolerance regulator; it activates automatically when OUT2 load drops below 1–4 mA and exits when load exceeds 2 mA. The open-drain PG output asserts high when OUT2 reaches ≥98% of nominal voltage and requires an external pullup resistor (100 kΩ–1 MΩ).

Key Specifications

Pinout & Package

TPS60310DGSG4 is housed in a 10-pin MSOP package (3.05 mm × 4.98 mm), thermally enhanced for space-constrained portable designs. Pin functions are validated per TI SLVS362A datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output charge pump applications.

Compared with TPS60310DGSG4, TPS60312DGSG4 offers identical performance with simplified PG interface, while MAX1722ZETA+ trades dual-output flexibility for higher output current and slightly lower quiescent current-but cannot replace the 2×VIN function or snooze-mode behavior of the TPS60310DGSG4.

Availability

TPS60310DGSG4 is available at Aetrix Electronics and suitable for hearing instruments, portable smart card readers, and battery-powered metering sensors requiring stable component supply with long-term lifecycle assurance.

Supply support for TPS60310DGSG4 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 broad industrial and automotive qualification.

The TPS6031X product line was designed specifically for space-constrained, battery-operated medical and portable instrumentation requiring ultra-low-quiescent, inductorless DC/DC conversion from single-cell sources.

FAQ

What is the minimum input voltage required for TPS60310DGSG4 to regulate 3.3 V on OUT2 at 20 mA?

The TPS60310DGSG4 requires a minimum input voltage of 1.1 V to sustain 3.3 V regulation on OUT2 at full 20 mA load, as confirmed by Figure 14 in the SLVS362A datasheet. Below 1.1 V, output voltage droops progressively; at 0.9 V input, maximum sustainable OUT2 current is ~10 mA. This threshold ensures stable operation across the full discharge curve of alkaline and NiMH cells.

Does TPS60310DGSG4 support simultaneous loading of both OUT1 and OUT2 outputs?

Yes, TPS60310DGSG4 supports concurrent loading: OUT1 can deliver up to 40 mA and OUT2 up to 20 mA, provided the total current drawn from the first charge pump stage (CP1) does not exceed 40 mA. For example, a 20-mA load on OUT1 and 10-mA load on OUT2 is valid. Exceeding the 40-mA CP1 limit causes output voltage collapse and potential thermal stress.

How does the snooze mode of TPS60310DGSG4 automatically exit under load increase?

TPS60310DGSG4 exits snooze mode autonomously when the OUT2 load current rises above 1–4 mA (depending on input voltage), as defined by the snooze threshold specification. At that point, the internal control circuit disables the low-power 10%-tolerance regulator and re-enables the main 4%-accuracy error amplifier and full switching operation-restoring full 3.3 V ±4% regulation without external intervention.

What is the recommended pullup resistor value for the PG pin on TPS60310DGSG4?

The PG pin on TPS60310DGSG4 is open-drain and requires an external pullup resistor to either OUT1 or OUT2. Texas Instruments specifies a range of 100 kΩ to 1 MΩ; a 470-kΩ resistor is commonly used to balance leakage current minimization and rise-time performance. Values outside this range may cause slow PG assertion or excessive static power draw.

Can TPS60310DGSG4 operate with input voltages below 0.9 V?

No-0.9 V is the absolute minimum rated input voltage for TPS60310DGSG4 per the Recommended Operating Conditions table. Operation below 0.9 V violates specifications and risks failure to start, unstable regulation, or undefined PG behavior. The device is not characterized for sub-0.9-V operation, and battery end-of-life voltage should be managed externally if deeper discharge is required.