Texas Instruments TLV61220DBVR

Overview

TLV61220DBVR from Texas Instruments is a synchronous step-up DC-DC converter optimized for ultra-low-input-voltage battery-powered systems. It delivers up to 5.5 V output from inputs as low as 0.7 V, achieves 95% peak efficiency at typical loads, supports 200 mA minimum switch current, and operates with only 5.5 μA quiescent current - enabling multi-year operation in coin-cell–powered IoT sensors and medical wearables.

For engineers reviewing the TLV61220DBVR datasheet, TLV61220DBVR pinout, TLV61220DBVR application, or TLV61220DBVR equivalent, key selection considerations include startup capability at 0.7 V, adjustable output voltage (1.8–5.5 V) via external resistor divider, integrated overvoltage/overtemperature/undervoltage protection, and compatibility with standard 4.7 μH inductors and 10 μF ceramic capacitors in space-constrained designs.

Technical Context

The TLV61220DBVR implements a hysteretic current-mode control architecture with synchronous rectification using two internal MOSFETs (LSD and HSD), eliminating external diode losses. Its self-oscillating topology maintains stability across wide input/output ratios without compensation components.

It features programmable feedback regulation (500 mV reference), pass-through mode during shutdown (VBAT-to-VOUT conduction via body diode), and adaptive discontinuous conduction mode at light loads to sustain high efficiency down to microampere output currents.

Key Specifications

Pinout & Package

TLV61220DBVR is housed in a 6-pin thin SOT-23 (DBV) package with 0.95 mm pitch, optimized for minimal PCB area and thermal resistance (R_θJA = 185.7 °C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-up converter applications.

Compared with TPS61200DRCT and MAX17222ETA+, the TLV61220DBVR uniquely balances ultra-low 0.7-V startup, integrated protections, and SOT-23 manufacturability - making it optimal for cost-sensitive, battery-life-critical designs where layout simplicity and reliability outweigh ultra-minimal quiescent current or fixed-frequency EMI control.

Availability

TLV61220DBVR is available at Aetrix Electronics and suitable for wearable medical sensors, low-power IoT endpoints, portable diagnostic devices, smart consumer electronics, and energy-harvesting systems requiring stable component supply across long production lifecycles.

Supply support for TLV61220DBVR 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 IC design and high-volume manufacturing.

The TLV61220DBVR belongs to TI's ultra-low-voltage boost converter product line, engineered specifically for battery- and energy-harvesting–powered applications where startup voltage, quiescent current, and integration density are primary constraints.

FAQ

What is the minimum input voltage required for TLV61220DBVR to start switching?

The TLV61220DBVR starts switching at 0.7 V input voltage under typical load conditions (≥150 Ω). This is verified in the datasheet's Recommended Operating Conditions table and confirmed by startup waveforms in Figure 17. The device uses an internal oscillator during initial startup to bootstrap the control circuitry before transitioning to normal hysteretic operation once VOUT reaches ~1.8 V. Below 0.7 V, the TLV61220DBVR remains non-functional.

Can TLV61220DBVR be used with a fixed 3.3-V output without external resistors?

No - the TLV61220DBVR is exclusively an adjustable-output variant. Unlike pin-compatible parts such as TLV61224, it does not include an internal resistor divider. To set 3.3 V output, external R1 and R2 must be connected between VOUT, FB, and GND per Equation 1 in the datasheet (e.g., R1 = 1 MΩ, R2 = 180 kΩ yields 3.3 V with 500 mV FB reference). The TLV61220DBVR has no factory-trimmed fixed-output option.

What is the maximum continuous output current achievable with TLV61220DBVR at 1.2-V input and 3.3-V output?

At 1.2-V input and 3.3-V output, the TLV61220DBVR delivers up to 50 mA continuously under typical conditions (25°C ambient, proper layout, 4.7 μH inductor, 10 μF input/output caps), as shown in Figure 2 of the datasheet. This is limited by thermal dissipation and the 200 mA minimum switch current specification - higher loads cause junction temperature rise and eventual thermal shutdown. Derating is required above 60°C ambient.

Does TLV61220DBVR support automatic shutdown when input voltage drops too low?

Yes - the TLV61220DBVR includes undervoltage lockout (UVLO) with a typical turn-off threshold of 0.7 V (range 0.5–0.7 V) as specified in Section 8.5. When VIN decreases below this threshold, the device ceases switching and enters low-current state (ISD ≤ 0.5 μA). It automatically resumes operation once VIN rises above the UVLO hysteresis level. This prevents erratic behavior during battery brownout.

How does the pass-through function work in TLV61220DBVR during EN = low?

When EN is pulled low, the TLV61220DBVR disables its switching stage and turns off both internal MOSFETs. However, the body diode of the high-side synchronous rectifier (HSD) remains forward-biased if VBAT > VOUT, allowing current to flow from VBAT to VOUT. This pass-through mode provides partial power continuity - e.g., maintaining RTC or memory backup - without requiring an external diode. Output voltage equals VBAT minus diode drop (~0.3–0.5 V).