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UC2572DTR

Public Made by Adom

by adom

Texas Instruments DC-DC Converters, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)uc2572dtrfactory-2.0.0extractor-text
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Contents

README

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UC2572DTR

Texas Instruments · DC-DC Converters · SOIC-8

UC2572DTR from Texas Instruments, in a SOIC-8. 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 EAINV input Inverting input to the error amplifier and summing junction for 3VREF and VOUT sense; the non-inverting input is internally tied to GND and the pin sources a maximum of 1mA.
2 EAOUT output Error amplifier output, used with EAINV for loop compensation components.
3 CS input Current limit sense pin connected to a ground-referenced sense resistor in series with the flyback inductor; OUT is held high (PMOS off) if CS exceeds 0.2V.
4 VCC power_in Input supply voltage to the chip, range 4.75 to 30V, bypass with a 1µF capacitor.
5 OUT output Gate drive for the external PMOS switch connected between VCC and the flyback inductor, swinging between VCC and GND.
6 GND power_in Circuit ground.
7 RAMP passive Oscillator and PWM ramp, frequency set by a capacitor to GND with F = 1/(15k·CRAMP), recommended range 10kHz to 200kHz.
8 3VREF power_out Precision 3V reference output, bypass with a 100nF capacitor to GND.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-8
Category Power Management (PMIC)
Pins 8

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage (absolute maximum) VCC 35 V 2
Error amp input voltage (absolute maximum) EAINV -0.6 V 2
Error amp output current (absolute maximum) IEAOUT 25 mA 2
RAMP pin voltage (absolute maximum) RAMP -0.3 4 V 2
CS pin voltage (absolute maximum) CS -0.3 V 2
Output current (absolute maximum) Iout -0.7 0.7 A 2
3VREF output current (absolute maximum) I3VREF -15 mA 2
Storage temperature (absolute maximum) -65 150 °C 2
Junction temperature (absolute maximum) -65 150 °C 2
Lead temperature (absolute maximum) 300 °C Soldering, 10 sec. 2
Supply voltage VCC (recommended) VCC 4.75 30 V Input voltage supply range (pin description) 4
Recommended oscillator frequency range 10 200 kHz Set by CRAMP on RAMP pin 4
Operating temperature range (UC2572, D package) -40 85 °C UC2572 grade, D package 2
3VREF reference voltage 3VREF 2.94 3 3.06 V 2
Reference line regulation 1 10 mV VCC = 4.75 to 30V 2
Reference load regulation 1 10 mV I3VREF = 0V to –5mA 2
Oscillator frequency 85 100 115 kHz VCC = 5V to 30V 2
Error amp input offset (EAINV) EAINV -10 0 10 mV EAOUT = 2V 2
Error amp row IEANV (parameter name not printed) IEANV -0.2 -0.9 V IEANV = –1mA 2
Error amp input bias row IEAINV IEAINV -0.2 -1 A EAOUT = 2V 2
Error amp open-loop voltage gain (AVOL) AVOL 65 90 dB EAOUT = 0.5V to 3V 2
EAOUT high 3.6 4 4.4 V EAINV = –100mV 2
EAOUT low 0.1 0.2 V EAINV = 100mV 2
EAOUT sink current IEAOUT -350 -500 µA EAINV = –100mV, EAOUT = 2V 2
EAOUT source current IEAOUT 7 20 mA EAINV = 100mV, EAOUT = 2V 2
Error amp unity gain bandwidth 0.6 1 MHz TJ = 25°C, F = 10kHz 2
Current sense comparator threshold 0.185 0.205 0.225 V 2
CS input bias current -0.4 -1 µA CS = 0 2
CS propagation delay 300 nS 2
OUT high saturation 0 0.3 V IOUT = 0 3
OUT high saturation 0.7 1.5 V IOUT = –10mA 3
OUT high saturation 1.5 2.5 V IOUT = –100mA 3
OUT low saturation 0.1 0.4 V IOUT = 10mA 3
OUT low saturation 1.5 2.2 V IOUT = 100mA 3
OUT rise time 30 80 nS TJ = 25°C, CLOAD = 1nF + 3.3 Ohms 3
OUT fall time 30 80 nS TJ = 25°C, CLOAD = 1nF + 3.3 Ohms 3
Maximum duty cycle 92 96 % EAINV = +100mV, VCC = 5V to 30V 3
Minimum duty cycle 0 % EAINV = –100mV, VCC = 5V to 30V 3
Modulator gain 45 55 65 %/V EAOUT = 1.5V to 2.5V 3
UVLO start threshold 3.5 4.2 4.5 V 3
UVLO hysteresis 100 200 300 mV 3
Sleep mode threshold 1.8 2.2 2.6 V 3
Supply current (operating) IVCC 9 15 mA VCC = 5V, 30V 3
Supply current (sleep mode) 50 150 A VCC = 30, CS = 3V 3

CAD (KiCad official)

  • Symbol: UC2572DTR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: uc2572dtr-etched.step / uc2572dtr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); uc2572dtr.step / uc2572dtr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (10 pp, sha256 9d4bf256c535d704, retrieved 2026-10-11, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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