19-0782; Rev 0; 4/07
LED Light Management IC in
2.5mm x 2.5mm UCSP
MAX830
General Description
Features
The MAX8830 light management IC integrates a 280mA
PWM DC-DC step-up converter, a 200mA white LED
camera flash current sink, and four programmable LED
current sinks. The internal 1MHz step-up converter fea-
tures an internal switching MOSFET and synchronous
rectifier to improve efficiency and minimize external
component count. The camera flash output current and
maximum timer is programmable through I2C. Each LED
current is individually regulated to a programmable level
(from off to 10mA in 32 steps) and is completely inde-
pendent of each other.
♦ Step-Up DC-DC Converter
280mA Guaranteed Output Current
Over 90% Efficiency
On-Chip FET and Synchronous Rectifier
Fixed 1MHz PWM Switching
Small 2.2µH to 10µH Inductor
I2C-Programmable V
16 Steps)
(3.8V to 5.2V and Off in
OUT
♦ Flash LED Current Sink
I2C-Programmable Flash Output Current (Off to
200mA in 16 Steps)
An I2C interface controls individual on/off of all outputs,
step-up output voltage setting, movie/flash current,
flash timer duration settings, and individual LED current
sink settings.
I2C-Programmable Flash Maximum Timer (0.5s,
1.0s, 1.5s, or 2.0s)
I2C-Programmable Movie Output Current (Off to
200mA in 16 Steps)
The MAX8830 is available in a 16-bump UCSP™ pack-
age (2.5mm x 2.5mm).
Movie Enabled by I2C or Logic Input
Flash Enabled by Logic Input
Low Dropout (75mV typ)
Applications
Cell Phones and Smartphones
♦ Four LED Current Sinks
PDAs and MP3 Players
Individually I2C-Programmable Output Current
Off to 10mA in 32 Steps
Low LED Sink Current Dropout Voltage (30mV typ)
♦ I2C Interface
Typical Operating Circuit
2.2μH TO
10μH
Write Address (0x94), Read Address (0x95)
Individual On/Off and LED Current Settings
Simple Register Mapping
PROGRAMMABLE
OUTPUT
3.8V TO 5.2V
INPUT
2.7V TO 5.5V
♦ < 1µA Shutdown Current
UP TO 280mA
LX
OUT
IN
♦ Open/Short LED Detection
C
IN
C
OUT
GND
♦ Thermal-Shutdown Protection
♦ 16-Bump, 2.5mm x 2.5mm UCSP Package
PGND
MAX8830
COMP
200mA FLASH
Ordering Information
FLED
MOVIE ON
FLASH ON
MVON
FLEN
TEMP
RANGE
PKG
CODE
PART
PIN-PACKAGE
LED1
LED2
LED3
LED4
-40°C to 16-bump 2.5mm x
+85°C 2.5mm UCSP
MAX8830EWE+T
W162A2-1
SCL
SDA
IC
+Denotes a lead-free package.
V
LOGIC
V
DD
Pin Configuration appears at the end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
1
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.