Texas Instruments TPS612997YBHR

Overview

TPS612997YBHR from Texas Instruments is a synchronous boost converter IC optimized for ultra-low-power battery-powered systems, featuring 95nA quiescent current into VOUT, 1.9A average input current limit, and 1.8V–5.0V programmable output voltage range. It operates from input voltages as low as 0.5V (0.7V startup), supports fast transient response (~8μs settling), and delivers up to 94% efficiency at 200mA load (VIN=3.6V→VOUT=5V). It is used in compact wearable power rails where coin-cell or alkaline battery longevity is critical.

For engineers reviewing the TPS612997YBHR datasheet, TPS612997YBHR pinout, TPS612997YBHR application, or TPS612997YBHR equivalent, key selection considerations include its WCSP package footprint (1.2mm × 0.8mm), true shutdown behavior (EN low disconnects VIN from VOUT), VSEL-based output voltage programming, and compatibility with light-load burst-mode operation.

Technical Context

The TPS612997YBHR implements a hysteretic current-mode control architecture with constant 350mA inductor ripple current, enabling variable switching frequency (≈3MHz typical at VIN=3.6V/VOUT=5V/1μH) and high light-load efficiency. Its control loop dynamically transitions between burst mode (95nA IQ), PFM, and PWM based on load demand while maintaining tight output regulation.

It integrates dual protection mechanisms: input average current limiting (1.9A nominal, verified at VIN=3.6V/VOUT=5V) and thermal shutdown (150°C threshold, 20°C hysteresis), alongside output short-circuit protection and auto pass-through when VIN > VOUT. The non-A variant (x, not xA) ensures true disconnection during EN low - no leakage path between VIN and VOUT.

Key Specifications

Pinout & Package

TPS612997YBHR uses a 6-ball wafer-level chip-scale package (WCSP) measuring 1.2mm × 0.8mm with bottom-side solder balls. Pin mapping follows standard YBH top-view layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS612997YBHR, TPS612997ADRLR trades package size and shutdown behavior for identical current capability, while TPS612996YBHR retains the same ultra-compact WCSP form factor but reduces current capacity and extends maximum output voltage - enabling differentiated trade-offs between power density, thermal management, and system-level functionality.

Availability

TPS612997YBHR is available at Aetrix Electronics and suitable for smart wearables, portable medical sensors, and optical transceiver modules requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.

Supply support for TPS612997YBHR 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 technologies, with decades of expertise in high-efficiency DC-DC conversion and ultra-low-power design.

The TPS61299x/xA product line was engineered specifically for battery-powered portable electronics demanding nanowatt-level quiescent operation, wide input voltage tolerance, and minimal solution size - targeting wearables, medical sensors, and optical modules.

FAQ

What is the minimum input voltage required for TPS612997YBHR to start up?

The TPS612997YBHR requires a minimum rising input voltage of 0.7V to initiate startup. Once operational, it continues regulating down to 0.5V input - enabling full utilization of alkaline or coin-cell batteries until near depletion. This 0.7V UVLO threshold is specific to the non-A (x) version and confirmed in Section 6.5 of the datasheet.

Does TPS612997YBHR support programmable output voltage, and how is it configured?

Yes, TPS612997YBHR supports 21 discrete output voltages from 1.8V to 5.0V via the VSEL pin. A single resistor connected between VSEL and GND selects the target voltage; configuration is latched once at power-up and remains fixed until EN is toggled. Resistor accuracy must be ±1%, and parasitic capacitance at VSEL must stay below 10pF for reliable detection.

What happens to TPS612997YBHR when the EN pin is driven low?

When EN is driven low, TPS612997YBHR enters true shutdown mode: switching ceases, the high-side MOSFET fully turns off, and VIN is completely disconnected from VOUT. Input current drops to ≤60nA, eliminating standby leakage - a critical feature for battery longevity in always-on devices.

What is the maximum recommended output voltage for TPS612997YBHR?

The maximum recommended output voltage for TPS612997YBHR is 5.0V, as explicitly defined in the Device Comparison Table and Section 6.3 Recommended Operating Conditions. This differs from other TPS61299x variants rated for up to 5.5V and reflects the 1.9A current limit's thermal and electrical derating constraints.

How does TPS612997YBHR achieve fast transient response, and what is its typical settling time?

TPS612997YBHR achieves fast transient response through optimized control loop dynamics and low-output-impedance design. In fast transient mode (enabled at VOUT = 4.5V/5V/5.5V), it settles within ~8μs when load steps from 0A to 200mA at VIN = 3.6V and VOUT = 5V - verified in Figure 6-6 and Section 1 Features.