MAX1605 Maxim, MAX1605 Datasheet
MAX1605
Manufacturer Part Number
MAX1605
Description
30V Internal Switch LCD Bias Supply
Manufacturer
Maxim
Datasheet
1.MAX1605.pdf
(12 pages)
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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 30V 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.
19-1666; Rev 1; 10/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
LCD Bias Generators
Cellular/Cordless Phones
Palmtop Computers
Personal Digital Assistants (PDAs)
Organizers
Handy Terminals
ON
V
V
IN
CC
= 0.8V TO V
= 2.4V TO 5.5V
OFF
Typical Operating Circuit
OUT
________________________________________________________________ Maxim Integrated Products
V
SHDN
LIM
CC
General Description
MAX1605
10µH
L1
30V Internal Switch LCD Bias Supply
GND
LX
FB
Applications
V
OUT
= V
IN
TO 30V
o Adjustable Output Voltage up to 30V
o 20mA at 20V from a Single Li+ Battery
o 88% Efficiency
o Up to 500kHz Switching Frequency
o Selectable Inductor Current Limit
o 18µA Operating Supply Current
o 0.1µA Shutdown Current
o Avaiable in Two Small Packages
MAX1605EUT-T
MAX1605ETT-T
(125mA, 250mA, or 500mA)
TOP VIEW
SHDN
GND
V
CC
6-Pin TDFN
6-Pin SOT23
PART
1
2
3
MAX1605
SOT23
-40°C to +85°C
-40°C to +85°C
6
5
4
RANGE
Ordering Information
TEMP
FB
LIM
LX
SHDN
Pin Configuration
GND
V
CC
1
2
3
3mm
PIN-
PACKAGE
6 SOT23-6
6 TDFN
MAX1605
TDFN
✕
3mm
Features
6
5
4
MARK
AAHP
ABW
SOT
FB
LIM
LX
1