LM2700 Datasheet | National Semiconductor

LM2700 600k Hz/1.25MHz, 2.5A, Step-up PWM DC/DC Converter October 2001 LM2700 600k Hz/1.25MHz, 2.5A, Step-up PWM DC/DC Converter General Description The LM2700 is a step-up DC/DC converter with a 3.6A, 80mΩ internal switch and pin selectable operating frequency. With the ability to produce 500m A at 8V from a single Lithium Ion battery, the LM2700 is an ideal part for biasing LCD displays. The LM2700 can be operated at switching frequencies of 600k Hz and 1.25MHz allowing for easy filtering and low noise. An external pensation pin gives the user flexibility in setting frequency pensation, which makes possible the use of small, low ESR ceramic capacitors at the output. The LM2700 Features continuous switching at light loads and operates with a switching quiescent current of 2.0m A at 600k Hz and 3.0m A at 1.25MHz. The LM2700 is available in a low profile 14-lead TSSOP package or a 14-lead LLP package. n n n n n Input undervoltage protection Adjustable output voltage up to 17.5V 600k Hz/1.25MHz pin selectable frequency operation Over temperature protection Small 14-Lead TSSOP or LLP package Applications n n n n n LCD Bias Supplies Handheld Devices Portable Applications GSM/CDMA Phones Digital Cameras Features n 3.6A, 0.08Ω, internal switch n Operating input voltage range of 2.2V to 12V Typical Application Circuit 600 k Hz Operation © 2001 National Semiconductor Corporation DS200123 .national. Connection Diagram Top View 14-Lead TSSOP or LLP Ordering Information Order Number LM2700MT-ADJ LM2700MTX-ADJ LM2700LD-ADJ LM2700LDX-ADJ Package Type TSSOP-14 TSSOP-14 LLP-14 LLP-14 NSC Package Drawing MTC14 MTC14 LDA14A LDA14A Supplied As 94 Units, Rail 2500 Units, Tape and Reel 1000 Units, Tape and Reel 4500 Units, Tape and Reel Pin Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Name VC FB SHDN AGND PGND PGND PGND SW SW SW NC VIN FSLCT NC Output voltage feedback input. Shutdown control input, active low. Analog ground. Power...