MAX8607 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 1MHz PWM Boost Converter for 1.5A White LED Camera Flash

19-3783; Rev 1; 2/07
EVAALVUAAILTAIOBNLEKIT
1MHz PWM Boost Converter for 1.5A
White LED Camera Flash
General Description
The MAX8607 white LED boost converter is optimized
for camera flash/strobe applications using high-current
white LEDs. The MAX8607 integrates a 1MHz PWM
boost converter, 1.5A low-dropout (LDO) current regu-
lator, and logic control circuitry for a space-saving LED
flash design. Two logic inputs control four modes of
operation: shutdown mode reduces the quiescent cur-
rent to 0.1µA (typ), movie mode supplies up to 360mA
of LED current for continuous lighting, flash mode sup-
plies up to 1.5A of LED current for short-duration light-
ing during an exposure, and disco mode supplies +5V
(at up to 1A) to external circuits while driving the LED
with a fixed 80mA current.
The internal 1MHz boost converter features an adaptive
control scheme with an internal switching MOSFET and
synchronous rectifier to improve efficiency and mini-
mize external component count. The MAX8607 is avail-
able in a 14-pin, 3mm x 3mm TDFN package (0.8mm
max height).
Applications
Camera Flashes/Strobes
Cell Phones/Smartphones
PDAs and Digital Cameras
Pin Configuration
Features
♦ Supports Lumileds and Other High-Power
White LEDs
♦ Independently Set Flash/Movie Currents
Flash-Mode Current Up to 1.5A
Movie-Mode Current Up to 360mA
♦ Disco Mode with Fixed 5V (Up to 1A) and 80mA
LED Current
♦ 84% Efficiency (P_LED / P_BATT) at 1.1A
♦ T_A Derating Function for LED Thermal Protection
♦ Output Overvoltage Protection (OVP)
♦ Soft-Start Eliminates Inrush Current
♦ 1MHz PWM Operation at All Loads
♦ Small External Components
♦ 2.7V to 5.5V Input Voltage Range
♦ 0.1µA Shutdown Mode
♦ 14-Pin, 3mm x 3mm TDFN Package
Ordering Information
PART*
PIN-PACKAGE
TOP MARK
MAX8607ETD+
14 TDFN 3mm x 3mm
(T1433-1)
ABA
+Indicates lead-free package.
*The MAX8607ETD is characterized over the -40°C to +85°C
temperature range.
Typical Operating Circuit
TOP VIEW
14 13 12 11 10 9 8
MAX8607
+
1234567
TDFN
3mm x 3mm
INPUT
2.7V TO 5.5V 2.2µH
10µF
MODE-
SELECT
INPUTS
LX ^MAX8607 OUT
PGND
OUTS
LGND
COMP
GND
OUTPUT
10µF
UP TO 1.5A FLASH
UP TO 360mA MOVIE
EN1
EN2
FLSH
LED
MOV
________________________________________________________________ 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.