LM2716 Datasheet | National Semiconductor

Description The LM2716 is posed of two PWM DC/DC converters. A buck (step-down) converter is used to generate a fixed output voltage. A boost (step-up) converter is used to generate an adjustable output voltage. Both converters feature low RDSON (0.16Ω and 0.12Ω) internal switches for maximum efficiency. Operating frequency can be adjusted anywhere between 300k Hz and 600k Hz allowing the use of small external ponents. External soft-start pins for each enables the user to tailor the soft-start times to a specific application. Each converter may also be shut down independently with its own shutdown pin. The LM2716 is available in a low profile 24-lead TSSOP package. Features n Fixed buck converter with a 1.8A, 0.16Ω, internal switch n Adjustable boost converter with a 3.6A, 0.12Ω, internal switch n Adjustable boost output voltage up to 20V n Operating input voltage range of 4V to 20V n Input undervoltage protection n 300k Hz to 600k Hz pin adjustable operating frequency n Over temperature protection n Small 24-Lead TSSOP package n Patented current limit circuitry Applications n n n n TFT-LCD Displays Handheld Devices Portable Applications Cellular Phones/Digital Camers Typical Application Circuit © 2004 National Semiconductor Corporation DS200712 .national. Connection Diagram Top View 24-Lead TSSOP Ordering Information Order Number LM2716MT-ADJ LM2716MTX-ADJ Package Type TSSOP-24 TSSOP-24 NSC Package Drawing MTC24 MTC24 Supplied As 61 Units, Rail 2500 Units, Tape and Reel .national. Pin Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Name PGND FB1 VC1 VBG SS2 VC2 FB2 AGND AGND PGND PGND PGND SW2 SW2 SW2 VIN VIN SHDN2 FSLCT SS1 SHDN1 CB1 VIN SW1 Buck output voltage feedback input. Buck pensation network connection. Connected to the output of the voltage error amplifier. Bandgap connection. Boost soft start pin. Boost pensation network connection. Connected to the output of the voltage error...