EL7512C Datasheet, PDF (1/9 Pages) Elantec Semiconductor – High Frequency PWM Step-Up Regulator

EL7512C - Preliminary
High Frequency PWM Step-Up Regulator
Features
• 90% efficiency
• Up to 600mA I_OUT
• 5V < V_OUT < 18V
• V_IN > 2V
• Up to 1.2MHz adjustable
frequency
• < 3µA shutdown current
• Adjustable soft-start
• Low battery detection
• Internal thermal protection
• 1.1mm max height 10-pin MSOP
package
Applications
• 3V to 5V, 12V, and 18V
converters
• 5V to 12V and 16V converters
• TFT-LCD
• DSL
• Portable equipment
• Desktop equipment
Ordering Information
Part No
EL7512CY
Package
10-Pin MSOP
Tape & Reel
Outline #
MDP0043
General Description
The EL7512C is a high frequency, high efficiency step-up DC:DC
regulator operated at fixed frequency PWM mode. With an integrated
1A MOSFET, it can deliver up to 600mA output current at up to 90%
efficiency. The adjustable switching frequency is up to 1.2MHz, mak-
ing it ideal for DSL applications.
When shut down, it draws <3µA of current. This feature, along with
the minimum starting voltage of 2V, makes it suitable for portable
equipment powered by one lithium ion or 3 to 4 NiMH cells.
The EL7512C is available in a 10-pin MSOP package, with maximum
height of 1.1mm. With proper external components, the whole con-
verter takes less than 0.25in² PCB space.
This device is specified for operation over the full -40°C to +85°C
temperature range.
Typical Application Diagram
VIN
(2V-
9V)
10µF
100k
10µH
1 PGND
LX 10
2 SGND
VDD 9
3 RT
FB 8
4 EN
SS 7
5 LBI
LBO 6
EL7512C
VOUT
(12V up
47µF
to
400mA)
80.6kΩ
20nF
10kΩ
4.7nF
Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these
specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.
© 2001 Elantec Semiconductor, Inc.