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TPS61221DCKT

Public Made by Adom

by adom

Texas Instruments DC-DC Converters, SC-70-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TPS61221DCKT

Texas Instruments · DC-DC Converters · SC-70-6

TPS61221DCKT from Texas Instruments, in a SC-70-6. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VIN power_in Boost converter input voltage, operating range 0.7 V to 5.5 V.
2 FB input Voltage feedback of adjustable version; must be connected to VOUT at fixed output voltage versions such as the TPS61221 (3.3 V).
3 GND power_in Control / logic and power ground.
4 VOUT power_out Boost converter output voltage (3.3 V fixed for TPS61221).
5 L passive Connection for inductor.
6 EN input Enable input (1: enabled, 0: disabled); must be actively tied high or low and not left floating.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SC-70-6
Category Power Management ICs
Pins 6

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
TPS61221 output voltage (3.3 V) VOUT 3.2 3.3 3.41 V VIN < VOUT 4
Input voltage VIN 0.7 5.5 V 4
Minimum input voltage at startup VIN 0.7 V RLoad ≥ 150 Ω 4
Switch current limit ISW 240 400 mA VOUT = 3.3 V, VIN = 1.2 V, TA = 25°C 4
Switch current limit ISW 200 400 mA VOUT = 3.3 V 4
Rectifying switch on resistance RDSon_HSD 1000 mΩ VOUT = 3.3 V 4
Main switch on resistance RDSon_LSD 600 mΩ VOUT = 3.3 V 4
Quiescent current into VIN IQ 0.5 0.9 μA IO = 0 mA, VEN = VIN = 1.2 V, VOUT = 3.3 V 4
Quiescent current into VOUT IQ 5 7.5 μA IO = 0 mA, VEN = VIN = 1.2 V, VOUT = 3.3 V 4
Shutdown current VIN ISD 0.2 0.5 μA VEN = 0 V, VIN = 1.2 V, VOUT ≥ VIN 4
Leakage current into VOUT ILKG_VOUT 1 μA VEN = 0 V, VIN = 1.2 V, VOUT = 3.3 V 4
Leakage current into L ILKG_L 0.01 0.2 μA VEN = 0 V, VIN = 1.2 V, VL = 1.2 V, VOUT ≥ VIN 4
EN input current IEN 0.005 0.1 μA Clamped on GND or VIN (VIN < 1.5 V) 4
EN input low voltage VIL 0.4 V 5 V > VIN > 1.5 V 4
EN input high voltage VIH 1.2 V 5 V > VIN > 1.5 V 4
Undervoltage lockout threshold VUVLO 0.5 0.7 V VIN decreasing 5
Overvoltage protection threshold 6 7.5 V 5
Overtemperature protection 140 °C 5
Overtemperature hysteresis 20 °C 5
Input voltage on VIN, L, VOUT, EN, FB VIN -0.3 7.5 V 3
Operating junction temperature TJ -40 150 °C 3
Storage temperature range Tstg -65 150 °C 3
ESD HBM V(ESD) -2 2 kV per ANSI/ESDA/JEDEC JS-001, all pins 3
ESD CDM V(ESD) -1.5 1.5 kV per JESD22-C101, all pins 3
Supply voltage at VIN VIN 0.7 5.5 V 4
Operating virtual junction temperature TJ -40 125 °C 4
Junction-to-ambient thermal resistance RθJA 231.2 °C/W DCK, 6 pins 4
Junction-to-case (top) thermal resistance RθJCtop 61.8 °C/W DCK, 6 pins 4
Junction-to-board thermal resistance RθJB 78.8 °C/W DCK, 6 pins 4
Junction-to-top characterization parameter ψJT 2.2 °C/W DCK, 6 pins 4
Junction-to-board characterization parameter ψJB 78 °C/W DCK, 6 pins 4
Inductor current ripple ILH 200 mA 4

CAD (KiCad official)

  • Symbol: TPS61221DCKT
  • Footprint: Package_TO_SOT_SMD:SOT-363_SC-70-6
  • 3D model: SC-70-6 (KiCad packages3D, STEP)
  • 3D model files: tps61221dckt-etched.step / tps61221dckt-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tps61221dckt.step / tps61221dckt.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (27 pp, sha256 94ade76ac047f32d, retrieved 2026-10-23, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF