MAX8575EUT+T Maxim Integrated Products, MAX8575EUT+T Datasheet

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MAX8575EUT+T

Manufacturer Part Number
MAX8575EUT+T
Description
IC CONV LCD BOOST SOT23-6
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX8574EUTT.pdf (11 pages)

Specifications of MAX8575EUT+T

Applications
Converter, LCD
Voltage - Input
2.7 ~ 5.5 V
Number Of Outputs
1
Voltage - Output
15V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SOT-23-6
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Power Dissipation
695.7 mW
Maximum Operating Temperature
+ 85 C
Maximum Supply Current
35 uA
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX8570 family of LCD step-up converters uses
an internal n-channel switch and an internal p-channel
output isolation switch. These converters operate from
a 2.7V to 5.5V supply voltage and deliver up to 28V at
the output.
A unique control scheme provides the highest efficien-
cy over a wide range of load conditions. The internal
MOSFET switch reduces external component count and
a high switching frequency (up to 800kHz) allows for
tiny surface-mount components. Three current-limit
options are available. The MAX8570 and MAX8572 use
a 110mA current limit to reduce ripple and component
size in low-current applications. For high-power require-
ments, the MAX8574 and MAX8575 use a 500mA cur-
rent limit and supply up to 20mA at 20V. The MAX8571
and MAX8573 use a 250mA current limit for a compro-
mise between ripple and power. Built-in safety features
protect the internal switch and down-stream compo-
nents from fault conditions.
Additional features include a low quiescent current and
a True Shutdown™ mode to save power. The MAX8570/
MAX8571/MAX8574 allow the user to set the output
voltage between 3V and 28V, and the MAX8572/
MAX8573/MAX8575 have a preset 15V output. These
step-up converters are ideal for small LCD panels with
low current requirements, but can also be used in other
applications. The MAX8571 evaluation kit is available to
help reduce design time.
19-3329; Rev 3; 3/10
True Shutdown is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com
Pin Configurations continued at end of data sheet.
LCD Bias Generators
Polymer LEDs (OLED)
Cellular or Cordless Phones
Palmtop Computers
Personal Digital Assistants (PDAs)
Organizers
Handy Terminals
TOP VIEW
SHDN
GND
________________________________________________________________ Maxim Integrated Products
FB
1
2
3
General Description
+
MAX8570
MAX8571
MAX8574
Pin Configurations
SOT23
Applications
6
5
4
V
SW
LX
CC
High-Efficiency LCD Boost
♦ 15V or Adjustable Output Voltage Up to 28V
♦ Safety Features Protect Against Output Faults
♦ 20mA at 20V from a Single Li+ Battery
♦ True Shutdown
♦ 87% Efficiency
♦ Up to 800kHz Switching Frequency
♦ Small, 6-Pin SOT23 and µDFN (MAX8570 Only)
+ Denotes a lead(Pb)-free RoHS-compliant package.
T = Tape and reel.
MAX8570ELT+T
MAX8570EUT+T
MAX8571EUT+T
MAX8572EUT+T
MAX8573EUT+T
MAX8574EUT+T
MAX8575EUT+T
MAX8570
MAX8571
MAX8572
MAX8573
MAX8574
MAX8575
Packages
V
CC
PART
ON
PART
= 2.7V TO 5.5V
with True Shutdown
OFF
Typical Operating Circuit
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
CURRENT LIMIT
SW
V
SHDN
CC
Ordering Information
MAX8572
MAX8573
MAX8575
110mA
250mA
110mA
250mA
500mA
500mA
Selector Guide
GND
OUT
LX
PIN-
PACKAGE
6L μDFN
6 SOT23
6 SOT23
6 SOT23
6 SOT23
6 SOT23
6 SOT23
OUTPUT VOLTAGE
V
Features
Adjustable
Adjustable
Adjustable
OUT
= V
15V
15V
15V
CC
TO 28V
MARK
ABTM
ABTN
ABTO
ABTK
ABTJ
ABTL
ACW
TOP
1

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MAX8575EUT+T Summary of contents

Page 1

... True Shutdown ♦ 87% Efficiency ♦ 800kHz Switching Frequency ♦ Small, 6-Pin SOT23 and µDFN (MAX8570 Only) Packages PART MAX8570ELT+T MAX8570EUT+T MAX8571EUT+T MAX8572EUT+T MAX8573EUT+T MAX8574EUT+T MAX8575EUT+T + Denotes a lead(Pb)-free RoHS-compliant package Tape and reel. Applications PART MAX8570 MAX8571 MAX8572 MAX8573 MAX8574 MAX8575 6 ...

Page 2

High-Efficiency LCD Boost with True Shutdown ABSOLUTE MAXIMUM RATINGS , SHDN to GND ..................................................-0. GND .................................................-0. GND (MAX8570/MAX8571/ MAX8574)...............................................-0. OUT to GND (MAX8572/MAX8573/MAX8575) .......-0.3V to +30V LX to ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 3.6V, SW open 1.3V (MAX8570/MAX8571/MAX8574 SHDN CC FB -40°C to +85°C, unless otherwise noted. Typical values are at T PARAMETER PMOS Current Limit ...

Page 4

High-Efficiency LCD Boost with True Shutdown (MAX8571 3.6V 18V, Circuit of Figure OUT EFFICIENCY vs. BATTERY VOLTAGE (FIGURE 4) 100 5mA LOAD 90 80 1mA LOAD 3.6V CC ...

Page 5

V = 3.6V 18V, Circuit of Figure OUT LOAD TRANSIENT V OUT I OUT 100µs/div PIN MAX8570/ MAX8572/ MAX8570 MAX8571/ MAX8573/ (µDFN) MAX8574 MAX8575 (SOT23) (SOT23 — — — ...

Page 6

High-Efficiency LCD Boost with True Shutdown V CC SHDN THERMAL SHUTDOWN MAX8570– MAX8575 Figure 1. Functional Diagram L1 22μ 4.7μF MAX8570 10pF MAX8571 V = 2.7V TO 5.5V CC MAX8574 1μF ON GND ...

Page 7

Detailed Description The MAX8570 family of compact, step-up DC-DC con- verters operates from a 2.7V to 5.5V supply. Consuming only 25µA of supply current, these ICs include an inter- nal MOSFET switch with a low on-resistance. A true- shutdown feature ...

Page 8

High-Efficiency LCD Boost with True Shutdown Table 1. Protection Features COMMON APPLICATION FAULTS OUT to FB resistor missing or disconnected. Output cap missing and FB open. FB shorted to GND. Diode missing or disconnected. Diode reverse polarity. FB node open. ...

Page 9

For the MAX8570/MAX8571/MAX8574 a feed-forward capacitor (C4 in Figures 2 and 4) connected from the output to FB improves stability over a wide range of battery voltages. A 10pF capacitor is recommended for the MAX8571 and MAX8574. A 10pF to ...

Page 10

High-Efficiency LCD Boost with True Shutdown TOP VIEW + SHDN 1 GND Chip Information PROCESS: BiCMOS 10 ______________________________________________________________________________________ Pin Configurations (continued MAX8570 μDFN For the latest package outline information and ...

Page 11

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2010 Maxim Integrated Products ...

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