LM2577T-ADJ/NOPB National Semiconductor, LM2577T-ADJ/NOPB Datasheet - Page 22

• Manufacturer Part Number: LM2577T-ADJ/NOPB
• Description: IC REG SIMPLE SWITCHER TO-220-5
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Up (Boost), Flyback, Forward Converterr

Specifications of LM2577T-ADJ/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 11.4 ~ 12.6 V
• Current - Output: 3A
• Frequency - Switching: 52kHz
• Voltage - Input: 3.5 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: TO-220-5 (Straight Leads)
• Current, Input Bias: 100 nA
• Current, Output: 3 A
• Current, Supply: 25 mA
• Frequency, Oscillator: 52 kHz
• Package Type: TO-220
• Regulation, Line: 20 mV
• Regulation, Load: 20 mV
• Regulator Type: Boost (Step-Up)
• Resistance, Thermal, Junction To Case: 2 °C/W
• Temperature, Operating, Range: -40 to +125 °C
• Transconductance: 3700
• Voltage, Gain: 800 V/V
• Voltage, Input: 3.5 to 40 V
• Dc To Dc Converter Type: Step Up
• Pin Count: 5 +Tab
• Input Voltage: 40V
• Output Voltage: 11.6 to 12.4V
• Switching Freq: 48 TO 56KHz
• Output Current: 3A
• Efficiency: 80%
• Output Type: Adjustable
• Switching Regulator: Yes
• Load Regulation: 50mV
• Line Regulation: 50mV
• Mounting: Through Hole
• Input Voltage (min): 3.5V
• Operating Temperature Classification: Automotive
• For Use With: 551011367-061 - BOARD WEBENCH LM2577,LM2585/87
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device
• Other names: *LM2577T-ADJ; *LM2577T-ADJ/NOPB; LM2577T-ADJ

Application Hints
(Continued)
01146818
T1 = Pulse Engineering, PE-65300
D1, D2 = 1N5821
±
FIGURE 18. LM1577-ADJ/LM2577-ADJ Flyback Regulator with
Outputs
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