TPS61220DCK - 0.7V Input Boost Converter 200mA SC-70
MPN: TPS61220DCK ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.65 | $1.65 |
| 10 | $1.45 | $14.50 |
| 100 | $1.18 | $118.00 |
| 500 | $0.95 | $475.00 |
| 1,000 | $0.78 | $780.00 |
TPS61220DCK Overview
A boost converter (also called a step-up converter) is a type of switched-mode DC-DC converter that produces a higher output voltage than its input voltage. In the power management IC hierarchy, boost converters fall under DC-DC converters -> voltage regulators -> power management ICs -> semiconductors. The TPS61220DCK's hysteretic controller topology eliminates the need for external compensation, simplifying design in space-constrained applications such as wearables and IoT sensor nodes.
Key features include 5.5 µA quiescent current for extended battery life, automatic transition between PWM and pulse-frequency modulation (PFM) at light load, an EN pin for shutdown with sub-1 µA leakage, and built-in output disconnect that prevents reverse current from the output to the input when Vin exceeds Vout. The device operates across -40°C to +85°C industrial temperature range, and the SC-70 package enables PCB layouts as small as a few mm².
The TPS61220 architecture uses synchronous rectification with an internal MOSFET pair, achieving efficiencies up to 95% at moderate loads. Its hysteretic control provides instant transient response without compensation loops, which is critical for powering microcontrollers and radio modules that exhibit abrupt load steps between sleep and active states.
Typical applications include single-cell battery boost to 3.3 V for MCUs and BLE radios, two-cell alkaline boost to 5 V for USB-powered peripherals, low-voltage energy harvesting front-ends, and backup-power systems in metering and security sensors. The wide Vin range down to 0.7 V enables direct operation from nearly depleted single-cell batteries.
When designing with this device, place the input/output capacitors and inductor as close as possible to the IC, and ensure the chosen inductor has low DCR (under 100 mΩ) and a saturation current rating above the peak switch current. This page synthesizes distributor pricing, same-family alternatives, and practical design guidance not consolidated in the TI product folder.
Drop-in alternatives for TPS61220DCK — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TPS61220DCK (same form factor and footprint) — differing in Package, Input Voltage Range, Topology, Operating Temperature, Quiescent Current.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS61221DCK
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS61220DCKR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.62 / Unit
View Datasheet →TPS61220DCKT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS61220DCK Maximum Ratings & Electrical Characteristics
| Topology | Synchronous Boost (Step-Up) |
| Input Voltage Range | 0.7 V to 5.5 V |
| Output Voltage Range | 1.8 V to 5.5 V (adjustable) |
| Switch Current (max) | 200 mA |
| Quiescent Current | 5.5 µA (typical) |
| Switching Frequency | Up to 1.5 MHz (typ, load-dependent) |
| Control Topology | Hysteretic with PWM-PFM auto-transition |
| Efficiency | Up to 95% (load-dependent) |
| Output Disconnect | Yes (true shutdown, no reverse current) |
| Enable Pin | Yes (active-high) |
| Operating Temperature | -40°C to +85°C (industrial) |
| Package | SC-70 (DCK) 6-pin, 2 mm × 2 mm |
| Mounting Type | Surface Mount |
| MSL Level | 1 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
TPS61220DCK Pin Configuration
| Pin 1 | GND — Ground reference |
| Pin 2 | VIN — Input supply voltage (0.7 V to 5.5 V) |
| Pin 3 | EN — Enable input (active-high, internal pull-down) |
| Pin 4 | FB — Feedback (adjustable output version) |
| Pin 5 | VOUT — Regulated output voltage |
| Pin 6 | L — Inductor connection (switch node) |
Typical Applications
TPS61220DCK is suitable for 6 applications: Single-Cell Li-Ion Boost to 3.3V MCU Power, Two/Three-Cell Alkaline to 5V Boost, Energy Harvesting Front-End, Backup Power for RTC and SRAM, BLE Beacon and Wearable Sensor Power, Industrial Sensor and IoT Node Power.
Single-Cell Li-Ion Boost to 3.3V MCU Power
The TPS61220DCK is purpose-built for boosting a single-cell Li-Ion or Li-polymer battery (3.0-4.2 V nominal, dropping to 2.7 V at cutoff) up to a stable 3.3 V rail that powers microcontrollers, BLE radios, and sensors. Its 0.7 V minimum Vin allows operation even from severely depleted cells, extracting usable capacity that a traditional boost would refuse. The 5.5 µA quiescent current is well below the self-discharge of the cell, so standby drain on the battery is dominated by the MCU sleep current rather than the converter. Synchronous rectification eliminates the external Schottky diode, shrinking the BOM to one inductor, two capacitors, and the IC - ideal for wearables and IoT nodes.
Recommended
Two/Three-Cell Alkaline to 5V Boost
For products powered by two or three AA/AAA alkaline cells (1.5 V to 4.5 V), the TPS61220DCK boosts the battery stack to a regulated 5 V rail for USB peripherals, LCD bias, or analog signal conditioning. With 200 mA switch current and synchronous rectification, the converter achieves 90%+ efficiency at moderate loads - critical when 100 mA of load on a 3 V battery means the cells last roughly twice as long compared to a linear regulator. The SC-70 package keeps the converter footprint to roughly 4 mm², fitting in handheld meters and remote controls.
Recommended
Energy Harvesting Front-End
In energy-harvesting systems powered by small solar cells, thermoelectric generators, or vibrational harvesters (often outputting 0.3-1.5 V), the TPS61220DCK can cold-start from 0.7 V and boost to 3.3 V for storage supercapacitor charging. Its low Iq of 5.5 µA ensures harvested energy is not wasted on quiescent overhead, and the hysteretic controller responds instantly to load steps without loop compensation tuning. Typical use cases include wireless sensor nodes that sleep most of the time and wake to transmit data over BLE or sub-GHz radios.
Recommended
Backup Power for RTC and SRAM
When a primary supply fails, the TPS61220DCK can be configured to maintain a 3.3 V rail from a single CR2032 coin cell (3.0 V) or supercapacitor bank for RTC retention and SRAM memory keep-alive. The output disconnect feature ensures no reverse current flows back into the boost input when the main supply returns, preventing inadvertent battery discharge. Its small SC-70 footprint and 5.5 µA Iq make it ideal for industrial controllers, security panels, and metering equipment that must preserve state through power interruptions.
Recommended
BLE Beacon and Wearable Sensor Power
The TPS61220DCK's combination of 0.7 V Vin, 5.5 µA Iq, and SC-70 micro-footprint makes it the canonical boost converter for coin-cell-powered BLE beacons, fitness bands, and medical wearables. The synchronous rectification with up to 95% efficiency at moderate loads directly translates to months-to-years of battery life. Combined with the automatic PWM-to-PFM transition at light load, the converter remains efficient whether the load is in deep sleep (µA range) or actively transmitting BLE packets (tens of mA peaks).
Recommended
Industrial Sensor and IoT Node Power
Industrial IoT sensors deployed in remote locations often run from 3.6 V primary lithium thionyl chloride cells (Li-SOCl2) whose voltage drops gradually over multi-year deployments. The TPS61220DCK boosts the slowly-declining cell voltage up to 3.3 V or 5 V for the sensor front-end, radio, and MCU, with synchronous rectification preserving battery capacity and a hysteretic controller providing instantaneous transient response for radio TX bursts. Its -40°C to +85°C industrial temperature range matches outdoor and factory-floor deployment requirements.
Recommended
Recommended Products Summary
Engineering reference data for TPS61220DCK — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS61221DCK | TPS61220DCKR | TPS61220DCKT |
|---|---|---|---|---|
| Package | SC-70 (DCK) 6-pin | SC-70 (DCK) 6-pin - same | SC-70 (DCK) 6-pin - same | SC-70 (DCK) 6-pin - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Topology | Synchronous Boost | Synchronous Boost | Synchronous Boost | Synchronous Boost |
| Input Voltage Range | 0.7 V to 5.5 V | 0.7 V to 5.5 V | 0.7 V to 5.5 V | 0.7 V to 5.5 V |
| Output Voltage | Adjustable 1.8 V to 5.5 V | Fixed 3.3 V | Adjustable 1.8 V to 5.5 V | Adjustable 1.8 V to 5.5 V |
| Switch Current (max) | 200 mA | 200 mA | 200 mA | 200 mA |
| Quiescent Current | 5.5 µA | 5.5 µA | 5.5 µA | 5.5 µA |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
Key Differentiators
- Sub-1V startup enables deep-discharge battery operation (vs TPS61221DCK)
- Internal synchronous rectification - no Schottky diode required (vs Discrete boost designs with external diode)
- Smallest 6-pin SC-70 footprint in TI TPS6122x family (vs TPS61230 (TSSOP-8))
Design Notes
Place the input capacitor (CIN), output capacitor (COUT), and inductor (L1) as close to the TPS61220DCK pins as physically possible, ideally within 2-3 mm. Use a wide ground plane directly under the device to minimize parasitic inductance on the GND return path. The feedback trace (pin 4) should be routed away from the switch node (pin 6) to avoid noise coupling into the regulation loop.
Select a 4.7 µH inductor with sub-100 mΩ DCR and saturation current rating above 600 mA (the TPS61220's peak switch current is well above the 200 mA continuous rating during transient load steps). Common choices include the Toko DFE2520F or Coilcraft LPS3015. Lower DCR directly improves efficiency at high load, and adequate saturation margin prevents inductor saturation that would otherwise cause output ripple spikes.
Estimated: at Vin=2.0 V, Vout=3.3 V, and 100 mA load, the TPS61220DCK dissipates approximately (Vout-Vin)*Iout/eta = 1.3 V * 100 mA / 0.9 = ~144 mW. The SC-70 package has a typical theta_JA of approximately 250°C/W, yielding a junction temperature rise of about 36°C above ambient - well within the 125°C maximum. At maximum switch current (200 mA) and Vin=0.7 V, Vout=3.3 V, dissipation can approach 500 mW; verify thermal margin in your layout.
Do not exceed the absolute maximum Vin of 5.5 V - even brief transients above this rating can permanently damage the device. When using the adjustable version, ensure the FB resistor divider uses 1% or better tolerance resistors to maintain output accuracy; the internal reference is 500 mV. The EN pin has an internal pull-down, so leaving it disconnected enables the device - tie it to GND through 100 kΩ for shutdown-mode leakage below 1 µA.
Compliance Information
RoHS compliant per TI product page. Halogen-free per TI Material Declaration. Industrial temperature grade (-40°C to +85°C); not AEC-Q100 qualified - choose TPS61220-Q1 variants for automotive.
