MAX8607ETD+ Fast Delivery |IC PHOENIX CO.,LIMITED

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MAX8607ETD+
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
FeaturesSupports Lumileds and Other High-Power
White LEDs Independently Set Flash/Movie Currents
Flash-Mode Current Up to 1.5A
Movie-Mode Current Up to 360mADisco Mode with Fixed 5V (Up to 1A) and 80mA
LED Current84% Efficiency (PLED/ PBATT) at 1.1ATADerating Function for LED Thermal ProtectionOutput Overvoltage Protection (OVP)Soft-Start Eliminates Inrush Current1MHz PWM Operation at All LoadsSmall External Components2.7V to 5.5V Input Voltage Range0.1µA Shutdown Mode14-Pin, 3mm x 3mm TDFN Package
MAX8607
1MHz PWM Boost Converter for 1.5A
White LED Camera Flash
LGND
FLSH
GND
MOV
EN1EN2
COMP
LEDPGNDPGNDLXOUTLXOUTS
MAX8607
TDFN
3mm x 3mm
TOP VIEW51110
Pin Configuration
Ordering Information
PGND
OUTPUT
LGND
COMP
FLSHMOV
OUT
EN1
EN2LED
INPUT
2.7V TO 5.5V
OUTS
UP TO 1.5A FLASH
UP TO 360mA MOVIE
GND
MODE-
SELECT
INPUTS
10μF10μF
2.2μH
MAX8607
Typical Operating Circuit
19-3783; Rev 1; 2/07
EVALUATION KIT
AVAILABLE
PART*PIN-PACKAGETOP 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.
MAX8607
1MHz PWM Boost Converter for 1.5A
White LED Camera Flash
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
OUT, OUTS, EN1, EN2 to GND................................-0.3V to +6V
FLSH, MOV, LED, COMP, LX to GND....-0.3V to (VOUTS+ 0.3V)
LGND, PGND to GND...........................................-0.3V to +0.3V
LX Current.........................................................................2ARMS
Continuous Power Dissipation (TA= +70°C)
14-Pin TDFN 3mm x 3mm (derate 18.2mW/°C
above +70°C)..............................................................1455mW
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS
(VEN1= VEN2= 5V, VOUT= VOUTS= 4V, COUT= 10µF, TA= -40°C to +85°C. Typical values are at TA= +25°C, unless otherwise
noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
Supply VoltageIC supplied from OUTS2.75.5V
Undervoltage-Lockout
ThresholdVOUTS rising, 100mV (typ) hysteresis2.252.382.65V
OUT Quiescent Current, Flash or Movie ModeLX switching, ILED = 0mA4mA
TA = +25°C0.11OUT Quiescent Current, Shutdown ModeEN1 = EN2 = GNDTA = +85°C1µA
Overvoltage limit, ILED = 0mA, VLED = 0V5.35.55.7
VLED = 0.5V3.653.853.95OUT Regulation Voltage
Disco mode, ILED = 80mA4.85.05.2
TA = +25°C0.011LED Current, Shutdown ModeEN1 = EN2 = GNDTA = +85°C0.5µA
Flash mode12001500
Movie mode338360Current-Source Guaranteed Sink Current
RMOV = 2kΩ,
RFLSH = 2kΩ,
VLED = 0.5VDisco mode80
Current-Source Multiplier in MOV Mode
(ILED / IMOV)IMOV up to 300µA1200A/A
TA ≥ 0°C (Note 2)-3±0.5+3Current-Source Accuracy in MOV ModeRMOV = 2kΩ,
VLED = 0.5VTA = -40°C-6±0.5+6%
MOV Current-Source Dropout VoltageRMOV = 2kΩ48100mV
Disco Current-Source Current SettingVEN1 = 0V, VEN2 = 5V6280108mA
Current-Source Multiplier in FLSH Mode
(ILED / IFLSH)IFLSH up to 300µA5000A/A
Current-Source Accuracy in FLSH ModeRFLSH = 2kΩ, VLED = 0.5V, TA ≥ -40°C
(Note 2)±3%
FLSH Current-Source Dropout VoltageRFLSH = 2kΩ200420mV
LX n-Channel Current Limit4.4A
MOV Regulation Voltage600mV
FLSH Regulation Voltage600mV
LED to COMP TransconductanceVCOMP = 1.5V60µS
MAX8607
1MHz PWM Boost Converter for 1.5A
White LED Camera Flash
ELECTRICAL CHARACTERISTICS (continued)
(VEN1= VEN2= 5V, VOUT= VOUTS= 4V, COUT= 10µF, TA= -40°C to +85°C. Typical values are at TA= +25°C, unless otherwise
noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
COMP Input Resistance to GNDDuring shutdown or UVLO140250Ω
LED TA Derating Function ThresholdTemperature when the LED current derating
function begins+40°C
LED TA Derating Function SlopeTA = +40°C to +85°C-1.67%/°C
EN1 and EN2 Logic-High Input VoltageVOUTS = 2.7V to 5.5V1.4V
EN1 and EN2 Logic-Low Input VoltageVOUTS = 2.7V to 5.5V0.4V
TA = +25°C0.011EN1 and EN2 Logic Input Bias CurrentVEN_ = 5.5VTA = +85°C0.03µA
LX n-Channel On-ResistanceILX = 200mA50100mΩ
LX p-Channel On-ResistanceILX = 200mA100200mΩ
TA = +25°C0.011LX LeakageVLX = 5.5VTA = +85°C0.03µA
Operating Frequency0.81.01.2MHz
Maximum Duty Cycle6575%
Minimum Duty Cycle48%
Note 1:All devices are production tested at TA= +25°C. Specifications over temperature are guaranteed by design and characteri-
zation and not production tested.
Note 2:For temperatures below the thermal derating start point.
Typical Operating Characteristics
(Circuit of Figure 2, VIN= VEN1= 3.6V, VEN2= 0V, TA= +25°C, unless otherwise noted.)
FLASH-MODE BATTERY CURRENT
vs. INPUT VOLTAGE
MAX8607toc01
BATTERY CURRENT (mA)
INPUT VOLTAGE (V)
RFLSH = 4.02kΩ
RFLSH = 8.06kΩ
RFLSH = 3.01kΩ
RFLSH = 2kΩ
MOVIE-MODE BATTERY CURRENT
vs. INPUT VOLTAGE
MAX8607toc02
BATTERY CURRENT (mA)
INPUT VOLTAGE (V)
RMOV = 2.00kΩ
RMOV = 3.57kΩ
RMOV = 6.49kΩ
BOOST CONVERTER EFFICIENCY
vs. LOAD CURRENT (DISCO MODE)
MAX8607toc03
LOAD CURRENT (mA)
EFFICIENCY (%)INCLUDES 83mA LED CURRENT
MAX8607
1MHz PWM Boost Converter for 1.5A
White LED Camera Flash
LED CURRENT
vs. AMBIENT TEMPERATURE
MAX8607toc04
LED CURRENT (mA)
AMBIENT TEMPERATURE (°C)
IC SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX8607toc05
SUPPLY CURRENT (
INPUT VOLTAGE (V)
DISCO MODE
MOVIE MODE
FLASH MODE
SWITCHING WAVEFORMS
(MOVIE MODE)
MAX8607toc06
VIN
VLX
VOUT10mV/div
5V/div
100mA/div
20mV/div
400ns/div
SOFT-START RESPONSE
(STANDBY TO MOVIE-MODE TRANSITION)
MAX8607toc07
VEN1
VOUT
IIN
ILED
200mA/div
2V/div
100mA/div
5V/div
100μs/div
SOFT-START RESPONSE
(MOVIE-MODE TO FLASH TRANSITION)
MAX8607toc08
VEN2
VOUT
IIN
ILED200mA/div
2V/div
500mA/div0A
5V/div
400μs/div
LOAD TRANSIENT
(DISCO MODE)
MAX8607toc09
VOUT(RIPPLE)
IL0AD100mA
500mV/div
700mA
2ms/divypical Operating Characteristics (continued)
(Circuit of Figure 2, VIN= VEN1= 3.6V, VEN2= 0V, TA= +25°C, unless otherwise noted.)
MAX8607
1MHz PWM Boost Converter for 1.5A
White LED Camera Flash
MOVIE-MODE LED CURRENT
vs. MOV RESISTANCE
MAX8607toc10
RMOV (kΩ)
LED CURRENT (mA)
FLASH-MODE LED CURRENT
vs. FLSH RESISTANCE
MAX8607toc11
RFLSH (kΩ)
LED CURRENT (mA)
1400ypical Operating Characteristics (continued)
(Circuit of Figure 2, VIN= VEN1= 3.6V, VEN2= 0V, TA= +25°C, unless otherwise noted.)
Pin Description
PINNAMEFUNCTIONCOMPCompensation Input. Connect a 0.1µF ceramic capacitor from COMP to GND for regulator stability.EN1Enable Input 1. EN1 and EN2 set the operating mode (see Table 1).EN2Enable Input 2. EN1 and EN2 set the operating mode (see Table 1).MOVMovie Current Program Input. Connect a resistor from MOV to GND to set the LED current in movie mode.
RMOV must be greater than 2kΩ.FLSHFlash Current Program Input. Connect a resistor from FLSH to GND to set the LED current in flash mode.
RFLSH must be greater than 2kΩ.GNDAnalog Ground. Connect GND to the exposed paddle directly under the IC.LGNDLED Current Regulator Ground. Connect LGND to the ground plane on the PC board.LEDLE D C ur r ent Reg ul ator . C onnect LE D to the cathod e of the exter nal LE D . LE D i s hi g h im p ed ance d ur i ng shutd ow n.
9, 10PGNDP ow er Gr ound . C onnect P GN D to the i np ut cap aci tor g r ound . Al so, connect P GN D to the P C b oar d g r ound p l ane.
11, 12LXInductor Connection. Connect LX to the switched side of the inductor. LX is internally connected to the
drains of the internal MOSFETs. Both MOSFETs are off during shutdown.OUTRegulator Output. Connect OUT to the anode of the external LED. Bypass OUT to PGND with a 10µF or
larger ceramic capacitor. During shutdown, OUT is one body-diode drop below the input voltage.OUTSOutp ut S ense and IC S up p l y Inp ut. C onnect OU TS to OU T at the outp ut b yp ass cap aci tor . The IC ’ s op er ati ng ow er i s sup p l i ed fr om OU TS .
—EPExposed Paddle. Connect the exposed paddle to GND directly under the IC and to a large PC board
ground plane for increased thermal performance.

Partno	Mfg	Dc	Qty	Available	Descript
MAX8607ETD+ \|MAX8607ETD	MAXIM	N/a	515	avai	1MHz PWM Boost Converter for 1.5A White LED Camera Flash