LM2577 SIMPLE SWITCHER® 3.5V to 40V, 3A Low Component Count Step-Up Regulator | TI.com

LM2577
ACTIVE
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
SIMPLE SWITCHER® 3.5V to 40V, 3A Low Component Count Step-Up Regulator

SIMPLE SWITCHER® 3.5V to 40V, 3A Low Component Count Step-Up Regulator - LM2577
Datasheet
LM1577/LM2577 SIMPLE SWITCHER Step-Up Voltage Regulator datasheet (Rev. D)
 

Recommended alternative parts

  • TPS55340  -  Integrated, 5-A 40-V Wide Input Range Boost/SEPIC/Flyback DC-DC Regulator

Description

The LM1577/LM2577 are monolithic integrated circuits that provide all of the power and control functions for step-up (boost), flyback, and forward converter switching regulators. The device is available in three different output voltage versions: 12V, 15V, and adjustable.

Requiring a minimum number of external components, these regulators are cost effective, and simple to use. Listed in this data sheet are a family of standard inductors and flyback transformers designed to work with these switching regulators.

Included on the chip is a 3.0A NPN switch and its associated protection circuitry, consisting of current and thermal limiting, and undervoltage lockout. Other features include a 52 kHz fixed-frequency oscillator that requires no external components, a soft start mode to reduce in-rush current during start-up, and current mode control for improved rejection of input voltage and output load transients.

Features

  • Requires Few External Components
  • NPN Output Switches 3.0A, can Stand off 65V
  • Wide Input Voltage Range: 3.5V to 40V
  • Current-mode Operation for Improved Transient Response, Line Regulation, and Current Limit
  • 52 kHz Internal Oscillator
  • Soft-start Function Reduces In-rush Current During Start-up
  • Output Switch Protected by Current Limit, Under-voltage Lockout, and Thermal Shutdown

All trademarks are the property of their respective owners.

Parametrics

Compare all products in Boost converters (integrated switch) Email Download to Excel
Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Switch current limit (Typ) (A) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Duty cycle (Max) (%) Operating temperature range (C) Type Rating Package Group
LM2577 Order now 3.5     40     1.23     15     3     1     52     52     10       95     -40 to 125     Converter     Catalog     DDPAK/TO-263 | 5
TO-220 | 5
TO-220 | 5    
LM2585 Order now 4     40     1.23     60     4     1     85     115     11       98     -40 to 125     Converter     Catalog     DDPAK/TO-263 | 5
TO-220 | 5    
LM2586 Order now 4     40     1.23     60     4     1     75     125     11     Enable
Frequency Synchronization    		 98     -40 to 125     Converter     Catalog     DDPAK/TO-263 | 7
TO-220 | 7    
LM2587 Order now 4     40     1.23     60     6.5     1     85     115     11       98     -40 to 125     Converter     Catalog     DDPAK/TO-263 | 5
TO-220 | 5