MAX8595ZETA-T Maxim Integrated Products, MAX8595ZETA-T Datasheet

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MAX8595ZETA-T

Manufacturer Part Number
MAX8595ZETA-T
Description
LED Drivers HIgh Efficiency 32V Step-Up Converter fo
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX8596ZETAT.pdf (10 pages)

Specifications of MAX8595ZETA-T

Number Of Segments
8
Operating Supply Voltage
2.6 V to 5.5 V
Maximum Power Dissipation
1950 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
TDFN EP
Minimum Operating Temperature
- 40 C
The MAX8595X/MAX8596X drive up to nine white LEDs
with constant current and high efficiency to provide
LCD backlighting in cell phones, PDAs, and other
handheld devices. The series connection allows the
LED currents to be identical for uniform brightness and
minimizes the number of traces to the LEDs. The
MAX8595X regulates constant LED current over the
entire temperature range. The MAX8596X features an
ambient-temperature derating function to avoid over-
driving the white LEDs during high ambient tempera-
tures, enabling higher drive current below +42°C.
A single Dual Mode™ input provides a simple means of
brightness adjustment and on/off control. Fast 1MHz
current-mode PWM operation allows for small input and
output capacitors and a small inductor while minimizing
ripple on the input supply/battery. Soft-start eliminates
inrush current during startup.
The MAX8595X/MAX8596X are available in a space-
saving, 8-pin, 3mm x 3mm TDFN package.
19-3485; Rev 2; 7/06
Dual Mode is a trademark of Maxim Integrated Products, Inc.
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.
200Hz TO 200kHz
PWM DIMMING
Cell Phones and Smart Phones
PDAs, Palmtops, and Wireless Handhelds
e-Books and Subnotebooks
White LED Display Backlighting
2.2µF
ANALOG OR
2.6V TO 6V
INPUT
with T
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
IN
CTRL
COMP
MAX8595X
MAX8596X
General Description
High-Efficiency, 36V Step-Up Converters
GND
A
PGND
Derating Option for 2 to 9 White LEDs
OUT
CS
LX
Applications
0.1µF
2 TO 9 LEDs
UP TO 38V
OUTPUT
♦ Up to Nine LEDs at 25mA
♦ Temperature Derating Function to Allow Fewer
♦ 86% Efficiency (P
♦ 1.7% Current-Regulation Accuracy
♦ Output Overvoltage Protection
♦ Flexible Dimming Control
♦ 1MHz PWM Switching Frequency
♦ 0.1µF Output Capacitor
♦ 12mV
♦ Soft-Start Eliminates Inrush Current
♦ 2.6V to 6V Input Range
♦ 0.3µA Shutdown Current
♦ Pin Compatible with the MAX1561 and MAX1599
♦ TDFN 3mm x 3mm x 0.8mm Package with
+Denotes lead-free package.
*EP = Exposed paddle.
MAX8595XETA-T
MAX8595XETA+T
MAX8596XETA-T
MAX8596XETA+T
LEDs for Same Light (MAX8596X)
Exposed Paddle
Analog
Direct-PWM Internal Filter
PART
TOP VIEW
P-P
Low Input Ripple
PIN INDICATOR ON LEAD-FREE PACKAGES.
A "+" SIGN WILL REPLACE THE FIRST
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
3mm x 3mm x 0.8mm
LEDs
Ordering Information
8
1
MAX8595X
MAX8596X
/ P
TDFN
7
2
Pin Configuration
IN
6
3
)
5
4
PIN-
PACKAGE
8 TDFN-EP*
8 TDFN-EP*
8 TDFN-EP*
8 TDFN-EP*
T = Tape and reel.
Features
T833-1
T833-1
T833-1
T833-1
CODE
PKG
1

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MAX8595ZETA-T Summary of contents

Page 1

... The MAX8595X/MAX8596X are available in a space- saving, 8-pin, 3mm x 3mm TDFN package. Cell Phones and Smart Phones PDAs, Palmtops, and Wireless Handhelds e-Books and Subnotebooks White LED Display Backlighting Dual Mode is a trademark of Maxim Integrated Products, Inc. Typical Operating Circuit INPUT 2. 2.2µF IN ...

Page 2

High-Efficiency, 36V Step-Up Converters with T Derating Option for White LEDs A ABSOLUTE MAXIMUM RATINGS IN to GND .................................................................-0.3V to +7V PGND to GND .......................................................-0.3V to +0.3V LX, OUT to GND .....................................................-0.3V to +40V CTRL to GND...................-0.3V ...

Page 3

High-Efficiency, 36V Step-Up Converters with T Derating Option for White LEDs A ELECTRICAL CHARACTERISTICS (continued 3.0V 22µ 2.2µ OUT wise noted. Typical values are +25°C.) ...

Page 4

High-Efficiency, 36V Step-Up Converters with T Derating Option for White LEDs A (Circuit of Figure 3.6V 25mA 22µ LED unless otherwise noted.) EFFICIENCY vs. INPUT VOLTAGE 100 95 ...

Page 5

High-Efficiency, 36V Step-Up Converters with T Derating Option for White LEDs A (Circuit of Figure 3.6V 25mA 22µ LED unless otherwise noted.) CTRL STEP RESPONSE V CTRL I ...

Page 6

High-Efficiency, 36V Step-Up Converters with T Derating Option for White LEDs A Detailed Description The high efficiency and small size of the MAX8595X/ MAX8596X make them ideally suited to drive up to nine series-connected LEDs. These devices ...

Page 7

High-Efficiency, 36V Step-Up Converters with T Derating Option for White LEDs A Design Procedure Adjusting LED Current Adjusting the output current of the MAX8595X/ MAX8596X changes the brightness of the LEDs. An analog input (CTRL) and the ...

Page 8

High-Efficiency, 36V Step-Up Converters with T Derating Option for White LEDs A In applications using large R SENSE to add a series resistor ( COMP control loop phase margin. See Figure 2 for details. ...

Page 9

High-Efficiency, 36V Step-Up Converters with T Derating Option for White LEDs A (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.) _______________________________________________________________________________________ Package ...

Page 10

... 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. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2006 Maxim Integrated Products ...

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