Rainbow Electronics MAX758A - Manual

General Description
The MAX1605 boost converter contains a 0.5A internal
switch in a tiny 6-pin SOT23 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 at the output.
The MAX1605 uses a unique control scheme providing
the highest efficiency over a wide range of load condi-
tions. An internal 0.5A MOSFET reduces external com-
ponent 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 com-
ponent size in low-current applications.
Additional features include a low quiescent supply cur-
rent and a shutdown mode to save power. The
MAX1605 is ideal for small LCD panels with low current
requirements but can also be used in other applica-
tions. A MAX1605EVKIT evaluation kit (EV kit) is avail-
able 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
♦ 88% Efficiency
♦ Up to 500kHz Switching Frequency
♦ Selectable Inductor Current Limit
(125mA, 250mA, or 500mA)
♦ 18µA Operating Supply Current
♦ 0.1µA Shutdown Current
♦ Small 6-Pin SOT23 Package
MAX1605
28V Internal Switch LCD Bias Supply
in SOT23
________________________________________________________________ Maxim Integrated Products 1
V
CC
LX GND
1 6 FB
5 LIM
SHDN
MAX1605
SOT23-6
TOP VIEW
2
3 4
Pin Configuration
V IN = 0.8V TO V OUT
V CC = 2.4V TO 5.5V
V OUT = V IN TO 28V
ON
OFF SHDN
V
CC
LIM
GND
LX
FB
MAX1605
L1
10 µH
Typical Operating Circuit
19-1666; 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 SOT
MARK
MAX1605EUT-T -40 °C to +85°C 6 SOT23-6 AAHP