MAX1573ETE+ Maxim Integrated Products, MAX1573ETE+ Datasheet

IC LED DRVR WHITE BCKLGT 16-TQFN

MAX1573ETE+

Manufacturer Part Number
MAX1573ETE+
Description
IC LED DRVR WHITE BCKLGT 16-TQFN
Manufacturer
Maxim Integrated Products
Type
Backlight, White LEDr
Datasheet

Specifications of MAX1573ETE+

Constant Current
Yes
Topology
Linear (LDO), PWM, Step-Down (Buck), Step-Up (Boost), Switched Capacitor (Charge Pump)
Number Of Outputs
4
Internal Driver
Yes
Type - Primary
Backlight
Type - Secondary
White LED
Frequency
1MHz
Voltage - Supply
2.7 V ~ 5.5 V
Voltage - Output
5V
Mounting Type
Surface Mount
Package / Case
16-TQFN Exposed Pad
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
28mA
Internal Switch(s)
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Efficiency
-
Lead Free Status / Rohs Status
 Details
The MAX1573 fractional charge pump drives up to four
white LEDs with regulated constant current for uniform
intensity. By utilizing proprietary adaptive 1x/1.5x
modes and ultra-low-dropout current regulators, it
maintains the highest possible efficiency over the full
1-cell Li+ battery input voltage range. The 1MHz fixed-
frequency switching allows for tiny external compo-
nents and the regulation scheme is optimized to ensure
low EMI and low input ripple.
An external resistor sets the full-scale LED current, while
two digital inputs control on/off and select amongst three
levels of brightness. A pulse-width modulation (PWM)
signal can also be used to modulate LED brightness,
requiring no additional components.
The MAX1573 is available in the tiny chip-scale UCSP™
(4 x 4 grid) and 16-pin thin QFN packages.
19-2847; Rev 2; 8/05
UCSP 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.
CONTROL
2.7V TO 5.5V
DIMMING
ON/OFF
AND
Cell Phones, Smart Phones
PDAs, Digital Cameras, Camcorders
MP3 Players
Other Handhelds with Color Displays
V
1μF
R
IN
SET
Typical Operating Circuit
IN
EN1
EN2
SET
C1N C1P C2N
________________________________________________________________ Maxim Integrated Products
1μF
MAX1573
GND
General Description
1μF
LED1
LED2
LED3
LED4
C2P
OUT
White LED 1x/1.5x Charge Pump in
Applications
1μF
UP TO 4 LEDS
V
OUT
♦ Proprietary Adaptive 1x/1.5x Modes
♦ High Efficiency (P
♦ 0.2% LED Current Matching
♦ 28mA/LED Drive Capability
♦ Low Input Ripple and EMI
♦ Eliminates Ballast Resistors
♦ Logic or PWM Dimming Control
♦ Low 0.1µA Shutdown Current
♦ 2.7V to 5.5V Input Voltage Range
♦ Soft-Start Limits Inrush Current
♦ Output Overvoltage Protection
♦ Thermal Shutdown Protection
♦ No External Schottky Diode Required
♦ Tiny UCSP (2.1mm x 2.1mm x 0.6mm) and Thin
+ Denotes lead-free package.
Pin Configurations continued at end of data sheet.
MAX1573EBE-T
MAX1573ETE
MAX1573ETE+
QFN (4mm x 4mm) Packages
TOP VIEW
PART
A "+" SIGN WILL REPLACE THE FIRST PIN INDICATOR ON LEAD-FREE PACKAGES.
UCSP and Thin QFN
C2N
C1P
CIN
IN
13
14
15
16
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
12
1
LEDs
Ordering Information
4mm × 4mm
THIN QFN
Pin Configurations
11
MAX1573
2
/P
BATT
10
3
), Up to 92%
4
9
PIN-PACKAGE
14 UCSP (4 x 4)
16 Thin QFN
16 Thin QFN
8
7
6
5
Features
LED1
LED2
SET
EN2
1

Related parts for MAX1573ETE+

MAX1573ETE+ Summary of contents

Page 1

... No External Schottky Diode Required ♦ Tiny UCSP (2.1mm x 2.1mm x 0.6mm) and Thin QFN (4mm x 4mm) Packages Applications PART MAX1573EBE-T MAX1573ETE MAX1573ETE+ + Denotes lead-free package. TOP VIEW V OUT LEDS 1μF A "+" SIGN WILL REPLACE THE FIRST PIN INDICATOR ON LEAD-FREE PACKAGES. ...

Page 2

White LED 1x/1.5x Charge Pump in UCSP and Thin QFN ABSOLUTE MAXIMUM RATINGS IN, OUT, EN1, EN2 to GND ...................................-0.3V to +6.0V SET, LED1, LED2, LED3, LED4 to GND ......-0. C1N, C2N to GND ..........................................-0. C1P, ...

Page 3

White LED 1x/1.5x Charge Pump 3.6V, EN1 = EN2 = IN EFFICIENCY ( LEDs BATT vs. Li+ BATTERY DISCHARGE 100 90 FULL 3/10 80 1/10 70 ...

Page 4

White LED 1x/1.5x Charge Pump in UCSP and Thin QFN (V = 3.6V, EN1 = EN2 = IN STARTUP AND SHUTDOWN RESPONSE V EN_ OUT LED_ = 4 ...

Page 5

White LED 1x/1.5x Charge Pump in PIN NAME TQFN UCSP 13 D1 C1N Transfer Capacitor 1 Negative Connection. See the Component Selection section for capacitor value Supply Voltage Input. IN supplies power for the IC. Bypass IN ...

Page 6

... EN1/EN2 STATES BRIGHTNESS EN1 = low, EN2 = low Shutdown EN1 = low, EN2 = high 1/10 Brightness EN1 = high, EN2 = low 3/10 Brightness EN1 = high, EN2 = high Full Brightness True Shutdown is a trademark of Maxim Integrated Products, Inc. 1μF 1μF C1P C1N C2P C2N OUT 1μF ...

Page 7

White LED 1x/1.5x Charge Pump in PC Board Layout and Routing The MAX1573 is a high-frequency switched-capacitor voltage regulator. For best circuit performance, use a solid ground plane and place the MAX1573 as possible. Also, place their ...

Page 8

White LED 1x/1.5x Charge Pump in UCSP and Thin QFN (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. 8 _______________________________________________________________________________________ Package Information PACKAGE OUTLINE, 12, ...

Page 9

... 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 _____________________ 9 © 2005 Maxim Integrated Products ...

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