Rainbow Electronics MAX1606 User Manual
General description, Applications, Features
General Description
The MAX1606 is a step-up DC-DC converter that con-
tains a 0.5A internal power switch and a 0.5A output
isolation switch in an 8-pin µMAX package. The IC
operates from a 2.4V to 5.5V supply voltage but can
boost battery voltages as low as 0.8V up to 28V.
The MAX1606 uses a unique control scheme that pro-
vides high efficiency over a wide range of load condi-
tions. An internal 0.5A MOSFET reduces external
component count, and a high switching frequency (up
to 500kHz) allows for tiny surface-mount components.
The current limit can be set to 500mA, 250mA, or
125mA, allowing the user to reduce the output ripple
and component size in low-current applications.
Additional features include a low quiescent supply cur-
rent and a true shutdown mode that saves power by
disconnecting the output from the input. The MAX1606
is ideal for small LCD panels with low current require-
ments but can also be used in other applications. A
MAX1606 evaluation kit is available to help speed up
design time.
________________________Applications
LCD Bias Generators
Cellular or Cordless Phones
Palmtop Computers
Personal Digital Assistants (PDAs)
Organizers
Handy Terminals
Features
♦ Adjustable Output Voltage up to 28V
♦ 20mA at 20V from a Single Li+ Battery
♦ True Shutdown (Output Disconnected from Input)
♦ Output Short-Circuit Protection
♦ 88% Efficiency
♦ Up to 500kHz Switching Frequency
♦ Selectable Inductor Current Limit
(125mA, 250mA, or 500mA)
♦ 0.1µA Shutdown Current
♦ 8-Pin µMAX Package
MAX1606
28V Internal Switch LCD Bias Supply
with True Shutdown
________________________________________________________________ Maxim Integrated Products
1
1
2
3
4
8
7
6
5
SW
SHDN
LIM
LX
GND
V
CC
FB
BATT
MAX1606
µMAX
TOP VIEW
Pin Configuration
V
IN
= 0.8V TO 5.5V
V
CC
= 2.4V TO 5.5V
V
OUT
= V
IN
TO 28V
ON
OFF
SHDN
V
CC
LIM
SW
BATT
GND
LX
FB
MAX1606
Typical Operating Circuit
19-1744; Rev 0; 7/00
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX1606EUA
-40
°C to +85°C
8
µMAX