Texas Instruments TPS61170DRVTG4

Overview

TPS61170DRVTG4 from Texas Instruments is a monolithic high-voltage boost converter IC with integrated 1.2-A, 40-V N-channel MOSFET, operating at 1.2-MHz fixed switching frequency. It delivers up to 38 V output from 3–18 V input, supports on-the-fly FB reference reprogramming via PWM or EasyScale™, and achieves up to 93% efficiency in compact 2-mm × 2-mm QFN-6 package. It is used in 5-V-to-12-V/24-V boost power supplies for industrial displays and ADSL modems.

For engineers reviewing the TPS61170DRVTG4 datasheet, TPS61170DRVTG4 pinout, TPS61170DRVTG4 application, or TPS61170DRVTG4 equivalent, key selection considerations include its 1.2-A switch current limit, 1.229-V feedback reference with programmable scaling, 1.2-MHz switching frequency enabling low-profile magnetics, integrated soft start and thermal shutdown, and dual-mode CTRL pin control (PWM or 1-wire EasyScale).

Technical Context

The TPS61170DRVTG4 implements current-mode PWM control with slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its error amplifier drives the COMP pin, requiring external RC network for loop stability and transient response optimization.

It features dual-function CTRL pin: logic-level enable/disable with internal 800-kΩ pulldown resistor, plus programmable feedback reference via either PWM duty-cycle modulation (V_FB = Duty × 1.229 V) or EasyScale™ 1-wire protocol supporting 32 discrete FB voltage steps from 0 mV to 1.229 V.

Key Specifications

Pinout & Package

The TPS61170DRVTG4 is housed in a thermally enhanced 6-pin VSON (QFN) package measuring 2.00 mm × 2.00 mm, with exposed thermal pad soldered to analog ground plane for optimal power dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61170DRVTG4, TPS61088RHLR offers higher current and frequency but sacrifices on-the-fly FB control, while MAX17222ELT+T trades performance for nanoamp shutdown current-neither provides the same combination of 1.2-A capability, 38-V output, and dual-mode programmability in a 2-mm QFN.

Availability

TPS61170DRVTG4 is available at Aetrix Electronics and suitable for industrial display power, ADSL modem DC-DC conversion, and portable instrument high-voltage bias applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance.

Supply support for TPS61170DRVTG4 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-reliability power conversion ICs.

The TPS61170DRVTG4 belongs to TI's high-voltage boost converter product line, designed specifically for space-constrained applications needing efficient, programmable, and robust step-up regulation from 3–18 V inputs to up to 38 V outputs.

FAQ

What is the maximum output voltage supported by the TPS61170DRVTG4?

The TPS61170DRVTG4 supports output voltages up to 38 V, limited by its 40-V integrated N-channel MOSFET breakdown rating and internal protection circuitry. This makes it suitable for applications like LCD bias supplies and telecom interface rails where voltages exceed standard 24-V limits. The actual achievable output depends on external components-especially inductor saturation current, diode reverse voltage rating, and output capacitor voltage rating-all of which must be selected to safely handle the full 38-V condition. The TPS61170DRVTG4 itself does not regulate beyond 38 V.

How does the CTRL pin function in the TPS61170DRVTG4?

The CTRL pin on the TPS61170DRVTG4 serves three critical roles: (1) logic-level enable/disable (high = active, low >2.5 ms = shutdown), (2) PWM-based FB reference scaling (V_FB = Duty × 1.229 V), and (3) EasyScale™ 1-wire interface for 32-step digital FB programming. An internal 800-kΩ pulldown resistor ensures safe default disable state. The pin's multifunctionality eliminates need for external enable logic or DACs, simplifying system-level voltage control in the TPS61170DRVTG4 design.

What package type and thermal characteristics does the TPS61170DRVTG4 use?

The TPS61170DRVTG4 uses a 6-pin VSON (QFN) package measuring 2.00 mm × 2.00 mm with an exposed thermal pad. Its junction-to-board thermal resistance (R_θJB) is 36.0°C/W, and junction-to-ambient (R_θJA) is 66.5°C/W under standard JEDEC PCB conditions. To achieve rated performance, the thermal pad must be soldered to a solid analog ground plane with ≥4 thermal vias connecting to inner ground layers. This thermal design enables continuous 300-mA output at 12 V from 5-V input without derating in typical industrial ambient conditions.

Can the TPS61170DRVTG4 operate in SEPIC topology?

Yes, the TPS61170DRVTG4 supports SEPIC (Single-Ended Primary Inductance Converter) topology, as explicitly stated in its official documentation. Its integrated low-side N-channel MOSFET, current-mode control architecture, and wide input/output voltage ranges make it suitable for buck-boost applications where output voltage may fall below or rise above input voltage. Implementation requires proper selection of coupled inductors or two separate inductors, along with appropriate compensation network tuning on the COMP pin to ensure stability across the full operating range of the TPS61170DRVTG4.

What is the purpose of the COMP pin on the TPS61170DRVTG4?

The COMP pin on the TPS61170DRVTG4 is the output of the internal transconductance error amplifier and must be connected to an external RC compensation network. This network sets the dominant pole and zero of the control loop to ensure stability and optimize transient response under varying load and input conditions. Typical configurations use a series RC from COMP to GND, sometimes with additional parallel capacitance. Without correct COMP network design, the TPS61170DRVTG4 may exhibit oscillation, poor load regulation, or excessive output voltage overshoot during step-load events.