MAX1605EUT#TG16 Maxim Integrated Products, MAX1605EUT#TG16 Datasheet

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MAX1605EUT#TG16

Manufacturer Part Number
MAX1605EUT#TG16
Description
IC BOOST CONVERTER 30V SOT23-6
Manufacturer
Maxim Integrated Products
Type
Step-Up (Boost)r
Datasheet

Specifications of MAX1605EUT#TG16

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
0.8 ~ 30 V
Current - Output
500mA
Frequency - Switching
500kHz
Voltage - Input
2.4 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SOT-23-6
Power - Output
696mW
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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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
CC
IN
= 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
♦ Adjustable Output Voltage up to 30V
♦ 20mA at 20V from a Single Li+ Battery
♦ 88% Efficiency
♦ Up to 500kHz Switching Frequency
♦ Selectable Inductor Current Limit
♦ 18µA Operating Supply Current
♦ 0.1µA Shutdown Current
♦ Available 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

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MAX1605EUT#TG16 Summary of contents

Page 1

... LIM FB ON SHDN OFF GND ________________________________________________________________ Maxim Integrated Products 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. ♦ Adjustable Output Voltage up to 30V ♦ 20mA at 20V from a Single Li+ Battery ♦ 88% Efficiency ♦ 500kHz Switching Frequency ♦ ...

Page 2

Internal Switch LCD Bias Supply ABSOLUTE MAXIMUM RATINGS , FB, LIM, SHDN to GND....................................-0. GND ..............................................................-0.3V to +32V Continuous Power Dissipation (T = +70°C) A 6-Pin SOT23 (derate 8.7mW/°C above +70°C) ...........696mW 6-Pin ...

Page 3

Internal Switch LCD Bias Supply ELECTRICAL CHARACTERISTICS (continued) = SHDN = 3.3V 0°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL CONTROL INPUTS SHDN Input Threshold SHDN Input Bias Current ...

Page 4

Internal Switch LCD Bias Supply ELECTRICAL CHARACTERISTICS (continued) = SHDN = 3.3V -40°C to +85°C, unless otherwise noted.) (Note PARAMETER SYMBOL LIM Input Low Level LIM Input Float Level LIM Input High Level ...

Page 5

Internal Switch LCD Bias Supply = 3.6V 10µH, SHDN = LIM = 3.3V EFFICIENCY vs. LOAD CURRENT (L1 = 47µ LIM = OPEN (250mA) 84 LIM = GND ...

Page 6

Internal Switch LCD Bias Supply PIN NAME Active-Low Shutdown Input. A logic low shuts down the device and reduces the supply current SHDN 1 to 0.1µA. Connect SHDN Supply Voltage (+2.4V to +5.5V). Bypass ...

Page 7

Internal Switch LCD Bias Supply V CC (2.4V TO 5.5V MAX1605 LIM GND I PEAK = 500mA Figure 2. Setting the Peak Inductor Current Limit Setting the Output Voltage (FB) Adjust the output voltage by connecting a ...

Page 8

Internal Switch LCD Bias Supply Design Procedure Inductor Selection Smaller inductance values typically offer smaller physi- cal size for a given series resistance or saturation cur- rent. Circuits using larger inductance values may start up at lower input voltages ...

Page 9

Internal Switch LCD Bias Supply 0. OUT 2.4V TO 5.5V C6 0.1µF ON Figure 4. Negative Voltage for LCD Bias saturation region. When shut down, the input voltage exceeds the emitter ...

Page 10

Internal Switch LCD Bias Supply (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 10 ______________________________________________________________________________________ Package Information PACKAGE OUTLINE, SOT-23 21-0058 F ...

Page 11

Internal Switch LCD Bias Supply (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) D PIN 1 INDEX AREA NUMBER OF LEADS SHOWN ARE FOR ...

Page 12

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products Package Information (continued) ...

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