Texas Instruments TLV61220DBVT

Overview

TLV61220DBVT 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, supports 200 mA minimum switch current, and operates with only 5.5 μA quiescent current - enabling long runtime in single-cell alkaline, NiMH, or Li-ion applications such as portable medical sensors and LED lighting.

For engineers reviewing the TLV61220DBVT datasheet, TLV61220DBVT pinout, TLV61220DBVT application, or TLV61220DBVT equivalent, key selection considerations include startup capability at 0.7 V, adjustable 1.8–5.5 V output via FB resistor divider, hysteretic current-mode control for fast transient response, integrated overvoltage/overtemperature/undervoltage protection, and thin SOT-23-6 packaging for space-constrained designs.

Technical Context

The TLV61220DBVT implements a hysteretic current-mode controller that maintains constant 200 mA inductor ripple current while dynamically adjusting offset based on load. Its synchronous dual-MOSFET power stage uses low R_DS(on) switches (≤700 mΩ for rectifier, ≤550 mΩ for main switch) to maximize efficiency across input voltages from 0.7 V to 5.5 V.

Internal protections include undervoltage lockout (0.7 V typical turn-off), overvoltage clamping (6.5 V typical), and thermal shutdown (140 °C with 20 °C hysteresis). During shutdown, the device enables pass-through operation via the rectifying MOSFET's body diode, maintaining partial output connectivity without external components.

Key Specifications

Pinout & Package

TLV61220DBVT is housed in a 6-pin thin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for high-density PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS61200DRCR and MAX17222ETA+, the TLV61220DBVT uniquely balances 0.7-V startup, 5.5-μA quiescent current, and integrated pass-through functionality - making it optimal for cost-sensitive, space-constrained battery systems needing both ultra-low-voltage operation and graceful shutdown behavior.

Availability

TLV61220DBVT is available at Aetrix Electronics and suitable for battery-powered medical sensors, solar-powered environmental monitors, personal care devices, white LED lighting for wearables, and consumer IoT edge nodes requiring stable component supply across extended product lifecycles.

Supply support for TLV61220DBVT 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 company delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TLV61220DBVT belongs to TI's low-power DC-DC converter portfolio, designed specifically for energy-constrained applications where ultra-low-input-voltage operation, minimal quiescent current, and small footprint are critical - including portable medical, wearables, and energy-harvesting systems.

FAQ

What is the minimum input voltage required for TLV61220DBVT to start switching?

The TLV61220DBVT starts switching at an input voltage as low as 0.7 V into load, verified per datasheet Section 8.5. This enables reliable power-up from nearly depleted single-cell alkaline, NiMH, or Li-ion batteries without auxiliary circuitry. The device uses a dedicated startup oscillator to drive switches until the output reaches ~1.8 V, after which it transitions to normal hysteretic operation. TLV61220DBVT maintains this capability across its full –40°C to 85°C operating temperature range.

How is the output voltage set on TLV61220DBVT?

The TLV61220DBVT output voltage is set using an external resistor divider connected between VOUT, FB, and GND. With a precise 500 mV internal reference at the FB pin (±13 mV), the output voltage is calculated as V_OUT = 0.5 V × (1 + R1/R2). For example, selecting R2 = 180 kΩ and R1 = 1 MΩ yields 3.3 V. TLV61220DBVT supports outputs from 1.8 V to 5.5 V; the FB pin draws only 0.01 μA, allowing high-value resistors to minimize divider current and preserve efficiency.

Does TLV61220DBVT include built-in protection features?

Yes, TLV61220DBVT integrates three autonomous protections: output overvoltage clamping at 6.5 V typical (prevents damage if FB opens), overtemperature shutdown at 140 °C with 20 °C hysteresis (re-enables automatically upon cooling), and input undervoltage lockout disabling operation below 0.7 V typical. These functions operate without external components or configuration, ensuring robustness in unattended battery systems. TLV61220DBVT also limits switch current to ≥200 mA and features low leakage (<1 μA) into VOUT during shutdown.

What package type and dimensions does TLV61220DBVT use?

TLV61220DBVT uses a 6-pin thin SOT-23 (DBV) package with nominal body dimensions of 2.90 mm × 1.60 mm and 0.95 mm height. This RoHS-compliant, surface-mount package supports reflow soldering and is optimized for high-density layouts in portable electronics. Pin spacing is 0.95 mm, and thermal resistance is R_θJA = 185.7 °C/W. TLV61220DBVT's compact footprint enables integration into space-limited applications like hearing aids and smart patches.

Can TLV61220DBVT operate in shutdown mode while maintaining output connectivity?

Yes, when EN is pulled low, TLV61220DBVT enters shutdown mode with only 0.2–0.5 μA supply current, and the rectifying MOSFET's body diode provides passive pass-through from VBAT to VOUT. This allows partial power retention to critical circuits (e.g., real-time clocks or memory backup) without external diodes. TLV61220DBVT does not actively regulate during shutdown, so VOUT ≈ VBAT minus diode drop (~0.3–0.5 V), and load current is limited by the body diode's forward characteristics.