MAX8830 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – LED Light Management IC in 2.5mm x 2.5mm UCSP

19-0782; Rev 0; 4/07
LED Light Management IC in
2.5mm x 2.5mm UCSP
General Description
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.
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.
The MAX8830 is available in a 16-bump UCSP™ pack-
age (2.5mm x 2.5mm).
Applications
Cell Phones and Smartphones
PDAs and MP3 Players
Typical Operating Circuit
INPUT
2.7V TO 5.5V
C_IN
2.2μH TO
10μH
LX
IN
GND
PGND
PROGRAMMABLE
OUTPUT
3.8V TO 5.2V
UP TO 280mA
OUT
C_OUT
MOVIE ON
FLASH ON
IC
V_LOGIC
MAX8830
COMP
200mA FLASH
FLED
MVON
FLEN
LED1
SCL
LED2
SDA
LED3
V_DD
LED4
Features
♦ 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_OUT (3.8V to 5.2V and Off in
16 Steps)
♦ Flash LED Current Sink
I²C-Programmable Flash Output Current (Off to
200mA in 16 Steps)
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)
Movie Enabled by I²C or Logic Input
Flash Enabled by Logic Input
Low Dropout (75mV typ)
♦ Four LED Current Sinks
Individually I²C-Programmable Output Current
Off to 10mA in 32 Steps
Low LED Sink Current Dropout Voltage (30mV typ)
♦ I²C Interface
Write Address (0x94), Read Address (0x95)
Individual On/Off and LED Current Settings
Simple Register Mapping
♦ < 1µA Shutdown Current
♦ Open/Short LED Detection
♦ Thermal-Shutdown Protection
♦ 16-Bump, 2.5mm x 2.5mm UCSP Package
Ordering Information
PART
TEMP _PIN-PACKAGE
RANGE
PKG
CODE
MAX8830EWE+T ^{-40°C to 16-bump 2.5mm x}
+85°C 2.5mm UCSP
+Denotes a lead-free package.
W162A2-1
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.