LM2704EV: 20V @ 45mA, 2.2 ~ 7 Vin

Summary

The LM2704 is a micropower step-up DC/DC in a small 5-lead SOT-23 package. A current limited, fixed off-time control scheme conserves operating current resulting in high efficiency over a wide range of load conditions. The 21V switch allows for output voltages as high as 20V.

The low 400ns off-time permits the use of tiny, low profile inductors and capacitors to minimize footprint and cost in space conscious portable applications. The LM2704 is ideal for LCD panels requiring low current and high efficiency as well as white LED applications for cellular phone back-lighting. The LM2704 can drive up to 8 white LEDs from a single Li-Ion battery.

Specifications

Manufacturer	Texas Instruments
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	296-45729-ND
Eval Board Supplier	Texas Instruments
Eval Board	Board not Stocked
Topology	Step Up
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	20 V
Current Out	45 mA
Voltage In	2.2 ~ 7 V
Efficiency @ Conditions	>85%, 4.2V in, 20V @ 5 ~ 45 mA >83%, 3.3V in, 20V @ 5 ~ 30 mA >80%, 2.5V in, 20V @ 7 ~ 20 mA
Voltage Out Range	1.237 ~ 21 V
Features	Current Limit (Adj. or Fixed) Shutdown, Enable, Standby Under Voltage Protection, Brown-Out
Switching Frequency	- Not Given
Standby Current [Typical]	10 nA
Quiescent Current [Typical]	41 µA
Component Count + Extras	7 + 6
Internal Switch	Yes
Design Author	Texas Instruments
Application / Target Market	Audio: MP3 Players Cell Phones Digital Cameras Garden Light LCD and OLED Bias Supplies LCD Backlighting Point of Load (PoL) Portable Devices USB Powered Devices
Standby Current [Maximum]	2.5 µA
Quiescent Current [Maximum]	53 µA
Main I.C. Base Part	LM2704
Date Created By Author
Date Added To Library	2011-03