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LM2588S-12/NOPB-LM2588S-ADJ/NOPB
SIMPLE SWITCHER 5A Flyback Regulator with Shutdown 7-DDPAK/TO-263 -40 to 125
LM2588
www.ti.com SNVS117D–APRIL 1998–REVISED APRIL 2013
LM2588 SIMPLE SWITCHER® 5A Flyback Regulator with Shutdown
Checkfor Samples: LM2588
1FEATURES DESCRIPTIONThe LM2588 series of regulators are monolithic
2345• Requires Few External Components integrated circuits specifically designed for flyback,
• Familyof Standard Inductors and step-up (boost), and forward converter applications.
Transformers The deviceis availablein4 different output voltage
NPN Output Switches 5.0A, Can Stand Off 65V versions: 3.3V, 5.0V, 12V, and adjustable.
Wide Input Voltage Range: 4Vto 40V Requiring a minimum number of external
components, these regulators are cost effective, and
• Adjustable Switching Frequency: 100 kHztosimpleto use. Includedin the datasheet are typical
200 kHz circuitsof boost and flyback regulators. Also listed
• External Shutdown Capability are selector guides for diodes and capacitors anda
• Draws Less Than60 μA When Shut Down familyof standard inductors and flyback transformers
designedto work with these switching regulators.
• Frequency Synchronization Current-mode Operation for Improved The power switchisa 5.0A NPN device that can
Transient Response, Line Regulation, and stand-off 65V. Protecting the power switch are current
Current Limit and thermal limiting circuits, and an undervoltage
lockout circuit. This IC contains an adjustable
• Internal Soft-start Function Reduces In-rush frequency oscillator that can be programmed upto
Current During Start-up 200 kHz. The oscillator can alsobe synchronized with
• Output Transistor Protected by Current Limit, other devices,so that multiple devices can operateat
Under Voltage Lockout, and Thermal the same switching frequency.
Shutdown Other features include soft start modeto reduce in-
• System Output Voltage Toleranceof ±4% Max rush current during start up, and current mode control
Over Line and Load Conditions for improved rejectionof input voltage and output
load transients and cycle-by-cycle current limiting.
TYPICAL APPLICATIONS The device also hasa shutdown pin,so thatit canbe
turned off externally. An output voltage toleranceof
• Flyback Regulator ±4%, within specified input voltages and output load
• Forward Converter conditions,is ensuredfor the power supply system.
Multiple-output Regulator Simple Boost Regulator Bent, 7-Pin
Top View Side View1. LM2588T-12or LM2588T-ADJ
See Package Number NDZ0007B concerning availability, standard warranty, and usein critical applicationsof
