Texas Instruments TPS61107PW

Overview

TPS61107PW from Texas Instruments is a dual-output, single-cell synchronous boost converter with integrated 120 mA LDO. It delivers fixed 3.3 V boost output and fixed 1.8 V LDO output, operates from 0.8 V to 3.3 V input, achieves up to 95% efficiency, and features load disconnect during shutdown. It is used in battery-powered portable electronics requiring two regulated rails, such as digital still cameras and PDAs.

For engineers reviewing the TPS61107PW datasheet, TPS61107PW pinout, TPS61107PW application, or TPS61107PW equivalent, key selection criteria include its dual-rail architecture (3.3 V boost + 1.8 V LDO), 20-pin TSSOP package, 1500 mA peak switch current limit, auto-discharge function, and low-battery detection with dual open-drain outputs (LBO1/LBO2).

Technical Context

The TPS61107PW implements a fixed-frequency PWM synchronous rectifier boost stage with N- and P-channel MOSFETs, delivering up to 95% efficiency and supporting discontinuous conduction mode with integrated anti-ringing switch. Its control loop uses multiple feedforward paths-monitoring V_IN, V_OUT, and NMOS voltage drop-to directly adjust duty cycle without relying solely on error amplifier feedback.

The device integrates a separate 120 mA LDO stage with programmable or fixed output (1.8 V for TPS61107), independently enabled via LDOEN, and supports sourcing from either the boost output or battery. Low-battery detection uses three internal thresholds (400/450/500 mV) applied to LBI, generating complementary open-drain flags on LBO1 and LBO2.

Key Specifications

Pinout & Package

The TPS61107PW is housed in a 20-pin TSSOP (PW) package with exposed thermal pad, optimized for compact portable PCB layouts and thermal performance in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61106PW, TPS61107PW provides higher LDO output (1.8 V vs. 1.5 V) for modern low-voltage I/O interfaces; compared with TPS61222DRVR, it adds integrated LDO, dual enable control, and battery supervision-making it suitable for more complex portable systems requiring robust power sequencing and health monitoring.

Availability

TPS61107PW is available at Aetrix Electronics and suitable for digital still cameras, PDAs, internet audio players, and portable medical monitors requiring stable component supply across extended production lifecycles.

Supply support for TPS61107PW 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.

The TPS6110x product line was designed specifically for single- and dual-cell battery-powered portable electronics, delivering dual regulated outputs with ultra-low quiescent current, integrated supervision, and robust thermal and electrical protection.

FAQ

What is the fixed output voltage configuration of the TPS61107PW?

The TPS61107PW provides a fixed 3.3 V output from its boost converter stage and a fixed 1.8 V output from its integrated LDO stage. These values are factory-programmed and do not require external feedback resistors, simplifying design and improving output accuracy over temperature and load variations. The TPS61107PW datasheet confirms these fixed outputs in the "Available Output Voltage Options" table.

Does the TPS61107PW support automatic discharge of output capacitors during shutdown?

Yes, the TPS61107PW includes an auto-discharge function controlled by the ADEN pin. When ADEN is pulled high, an internal 400 Ω switch connects VOUT to GND after shutdown, safely discharging output capacitance. This prevents residual voltage from keeping downstream circuitry (e.g., microcontrollers) in an undefined state. The TPS61107PW functional description explicitly states this behavior and specifies the 400 Ω resistance value.

How does the low-battery detection work on the TPS61107PW?

The TPS61107PW implements a three-threshold low-battery detector (400 mV, 450 mV, 500 mV) referenced to the LBI pin. Its dual open-drain outputs (LBO1 and LBO2) generate a 2-bit code indicating which threshold range the scaled battery voltage falls within. The TPS61107PW electrical characteristics table lists LBI voltage thresholds and corresponding LBO logic states, and the truth table in the application section defines exact mapping.

What is the maximum continuous output current capability of the TPS61107PW's LDO stage?

The TPS61107PW's integrated LDO delivers up to 120 mA continuously when the input voltage (LDOIN) is ≥1.8 V. At lower input voltages (<1.8 V), the maximum output current drops to 80 mA. These values are specified in the "LDO STAGE" section of the TPS61107PW electrical characteristics table under Io(LDO) parameter, with test conditions clearly defined.

Is the TPS61107PW pin-compatible with other devices in the TPS6110x family?

Yes, the TPS61107PW shares identical pinout and package (20-pin TSSOP) with TPS61100PW, TPS61103PW, and TPS61106PW. All variants use the same terminal functions and layout, enabling direct substitution in existing designs when output voltage requirements align. The "Terminal Functions" table in the TPS61107PW datasheet confirms identical pin numbering and I/O roles across the PW-package family.