Build with LM2576 — Datasheet Specs & AI Design Help

00 — Overview

What the LM2576 does

The LM2576 and LM2576HV are monolithic step-down voltage regulators requiring only four external components. These 3-A converters feature a fixed-frequency internal oscillator, cycle-by-cycle current limiting, and thermal shutdown for full protection. The series supports wide input voltage ranges up to 60 V for the HV version, with fixed outputs of 3.3 V, 5 V, 12 V, and 15 V, plus an adjustable version. Typical applications include motor drives, merchant network power supplies, appliances, and test equipment. The devices operate efficiently with standard inductors and offer TTL-shutdown capability for low-power standby modes.

Next step

Start building with LM2576 → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.

01 — Key specifications

Datasheet parameters

Datasheet parameters for LM2576
Parameter	Min	Typ	Max	Conditions	Source
quiescent current	—	5 mA	10 mA	iq; over operating free-air temperature range (unless otherwise noted)	TI datasheet, p. 7 — over operating free-air temperature range (unless otherwise noted)
output voltage	3.17 V	3.3 V	3.45 V	6 V ≤ VIN≤ 60 V, 0.5 A ≤ ILOAD≤ 3 ACircuit of Figure 8-3 and Figure 8-9; TJ = 25°C; vout; 6.5 Electrical Characteristics: 3.3 V	TI datasheet, p. 5 — 6.5 Electrical Characteristics: 3.3 V
output current	—	3 A	—		TI datasheet, p. 1
supply voltage range	—	—	40 V		TI datasheet, p. 4 — 6.3 Recommended Operating Conditions
switching frequency	—	52 kHz	—		TI datasheet, p. 1
operating temperature	-40 °C	—	125 °C		TI datasheet, p. 4 — 6.3 Recommended Operating Conditions
output count	—	1	—		TI datasheet, p. 1

02 — Alternatives

Closest matches to LM2576

LM2596 2.9× higher switching frequency, 1.8× lower supply voltage range, 1.5× lower dropout voltage

LM2576-12 3.6× higher output voltage, 2.0× higher quiescent current, 1.1× higher dropout voltage

LM2596-12 3.6× higher output voltage, 2.9× higher switching frequency, 1.8× lower supply voltage range

B0503LS-1WR3 9.9× lower output current, 8.0× lower supply voltage range, 3.8× higher switching frequency

B0503S-1WR3 9.9× lower output current, 8.0× lower supply voltage range, 5.2× higher switching frequency

AP63300WU-7 9.6× higher switching frequency, 4.8× higher output voltage, 2.2× lower supply voltage range

B0505S-1W 15.0× lower output current, 8.0× lower supply voltage range, 4.6× higher quiescent current

AW9962E 20.0× lower quiescent current, 9.8× lower supply voltage range, 5.0× lower input bias current

03 — FAQ

Frequently asked questions

What is the maximum operating temperature for the LM2576?

The maximum operating temperature is 125 °C.

How many outputs does the LM2576 have?

The LM2576 has 1 output.

What is the maximum output current of the LM2576?

The maximum output current is 3 A.

What is the output voltage when 6 V ≤ VIN≤ 60 V, 0.5 A ≤ ILOAD≤ 3 ACircuit of Figure 8-3 and Figure 8-9; TJ = 25°C; vout; 6.5 Electrical Characteristics: 3.3 V?

The output voltage is 3.3 V.

What is the quiescent current (iq) over the operating free-air temperature range?

The quiescent current (iq) is 5 mA over the operating free-air temperature range (unless otherwise noted).

What is the maximum supply voltage for the LM2576?

The supply voltage range is 40 V.

What is the switching frequency of the LM2576?

The switching frequency is 52 kHz.