19-3135; Rev 1; 8/05
KIT
ATION
EVALU
BLE
AVAILA
White LED Camera-Flash
Boost Converter
General Description
Features
♦
Supports Up to Five LEDs for Strobe or Flash
♦
Four Operational Modes
Strobe: Up to 300mA
Precharge: With POK Indicator
Movie: Up to 100mA
Shutdown: 0.01µA (typ) Quiescent Current
♦
Input Current Limiting
1A (MAX1583X)
500mA (MAX1583Y)
250mA (MAX1583Z)
♦
Small External Components
♦
2.6V to 5.5V Input Range
♦
24V Output Overvoltage Protection
♦
80% Efficient (P
LED
/ P
IN
) Movie Mode
♦
Thermal-Shutdown Protection
♦
10-Pin 3mm x 3mm TDFN Package
MAX1583
The MAX1583 white LED boost converter drives up to
five white LEDs with a constant current to provide cam-
era flash/strobe in cell phones, PDAs, DSCs, and other
hand-held devices. The MAX1583 includes a 24V boost
converter and a high-voltage LDO current regulator for
high efficiency and long battery life. Two logic inputs
control four modes of operation: shutdown mode (0.5µA
max), movie mode for high-efficiency continuous light-
ing (programmable up to 100mA), precharge mode for
charging a reservoir capacitor to 24V while the LEDs
are off (POK output indicates a full reservoir capacitor),
and strobe mode for firing the flash during an exposure
with a regulated current programmable up to 300mA.
The MAX1583X, MAX1583Y, and MAX1583Z offer high,
medium, and low current limits, respectively, to allow
tradeoff between reservoir capacitor size and peak
input current.
The MAX1583 is available in a 10-pin 3mm x 3mm
TDFN package (0.8mm max height).
Applications
Camera Flashes/Strobes
Cell Phones and Smart Phones
PDAs and Digital Still Cameras
PART
MAX1583XETB-T
MAX1583XETB+T
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
10 TDFN 3mm x 3mm
10 TDFN 3mm x 3mm
+Denotes
lead-free package.
Ordering Information continued at end of data sheet.
Typical Operating Circuit
PART
V
IN
2.6V TO 5.5V
Selector Guide
CURRENT LIMIT
1A
500mA
250mA
TOP MARK
ACJ
ACK
ACL
MAX1583XETB
MAX1583YETB
MAX1583ZETB
IN
GND
POK
EN1
EN2
STB
MOV
LX
MAX1583
I
LED
UP TO
300mA
OUT
Pin Configuration
TOP VIEW
GND
IN
LED
EN1
0
0
1
1
EN2
0
1
0
1
SHUTDOWN
PRECHARGE
MOVIE
STROBE
+
1
2
3
4
5
10
9
LX
LED
OUT
EN2
EN1
MOV
STB
POK
MAX1583
8
7
6
TDFN
(3mm x 3mm)
A "+" SIGN WILL REPLACE THE FIRST PIN INDICATOR ON LEAD-FREE PACKAGES.
________________________________________________________________
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.
White LED Camera-Flash
Boost Converter
MAX1583
ABSOLUTE MAXIMUM RATINGS
IN, EN1, EN2, POK to GND ......................................-0.3V to +6V
LX, OUT to GND .....................................................-0.3V to +30V
STB, MOV to GND .......................................-0.3V to (V
IN
+ 0.3V)
LED to GND..............................................-0.3V to (V
OUT
+ 0.3V)
I
LX
...................................................................................1.2A
RMS
Continuous Power Dissipation (T
A
= +70°C)
10-Pin 3mm x 3mm TDFN
(derate 24.4mW/°C above +70°C) .............................1951mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
ELECTRICAL CHARACTERISTICS
(V
IN
= V
EN1
= 3.0V, V
EN2
= 0V, V
OUT
= 20V, C
OUT
= 10µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C. Note 1)
PARAMETER
Supply Voltage
Undervoltage-Lockout Threshold
OUT Input Bias Current
Quiescent-Current Precharge Mode
Quiescent-Current Shutdown Mode
Output Overvoltage-Lockout Threshold
LED Regulation Voltage Threshold
LED Input Leakage Current
MOV, STB Regulation Voltage
Current-Source Multiplier in Movie Mode
Current-Source Accuracy, Movie Mode
MOV Current-Source Dropout Voltage
Current-Source Multiplier in Strobe Mode
Current-Source Accuracy, Strobe Mode
STB Current-Source Dropout Voltage
Current Limit
POK Low Voltage
POK Leakage
I
LED
/ I
MOV
, I
MOV
up to 300µA
R
MOV
= 2kΩ, V
LED
= 0.5V
I
LED
= 25mA, R
MOV
= 2kΩ
I
LED
/ I
STB
, I
STB
up to 300µA
R
STB
= 2kΩ, V
LED
= 3.0V
I
LED
= 250mA, R
STB
= 2kΩ
MAX1583X
MAX1583Y
MAX1583Z
I
SINK
= 1mA
T
A
= +25°C
T
A
= +85°C
800
400
200
-10
-7
LX switching, LEDs off
LX not switching, LEDs off
EN1 = EN2 = GND
T
A
= +25°C
T
A
= +85°C
22.5
0.5
V
IN
rising, hysteresis = 40mV (typ)
CONDITIONS
MIN
2.6
2.10
4
2.38
10
2
0.32
0.01
0.1
24
0.6
0.01
0.1
600
100
±1
0.1
1000
±1.5
0.9
1000
500
250
0.05
0.01
0.1
1200
600
300
0.1
1
V
µA
mA
+10
+7
25.5
0.7
1
0.5
TYP
MAX
5.5
2.55
15
UNITS
V
V
µA
mA
µA
V
V
µA
mV
A/A
%
V
A/A
%
V
V
OUT
rising, precharge or movie mode,
hysteresis = 500mV (typ)
V
LED
rising, movie mode
Precharge mode
T
A
= +25°C
T
A
= +85°C
2
_______________________________________________________________________________________
White LED Camera-Flash
Boost Converter
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
EN1
= 3.0V, V
EN2
= 0V, V
OUT
= 20V, C
OUT
= 10µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C. Note 1)
PARAMETER
EN1 and EN2 Input High Threshold
EN1 and EN2 Input Low Threshold
EN1 and EN2 Input Leakage
LX On-Resistance
LX Leakage
Operating Frequency
Maximum Duty Cycle
Minimum Duty Cycle
CONDITIONS
V
IN
= 2.6V to 5.5V
V
IN
= 2.6V to 5.5V
EN_ = IN
I
LX
= 200mA
V
LX
= 28V
T
A
= 0°C to +85°C
T
A
= -40°C to +85°C
Switching
Pulse skipping
T
A
= +25°C
T
A
= +85°C
0.8
0.75
90
94
0
T
A
= +25°C
T
A
= +85°C
0.01
0.1
1.3
0.01
0.1
1.0
1.2
1.25
2.25
5
MIN
1.6
0.6
1
TYP
MAX
UNITS
V
V
µA
Ω
µA
MHz
%
%
MAX1583
Note 1:
All units are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by design.
Typical Operating Characteristics
(V
IN
= 3.3V, C
RES
= 10µF, MAX1583Y, 4 LEDs in a 2 x 2 array, T
A
= +25°C, unless otherwise noted.)
EFFICIENCY vs. INPUT VOLTAGE
(MOVIE MODE)
MAX1583 toc01
MAXIMUM BOOST OUTPUT CURRENT
vs. INPUT VOLTAGE (MAX1583X)
MAX1583 toc02
MAXIMUM BOOST OUTPUT CURRENT
vs. INPUT VOLTAGE (MAX1583Y)
A: 1 LED
B: 2 LEDs
C: 3 LEDs
D: 4 LEDs
MAX1583 toc03
90
C
80
70
EFFICIENCY (%)
60
B
700
600
500
I
OUT
(mA)
A: 1 LED
B: 2 LEDs
C: 3 LEDs
D: 4 LEDs
600
500
400
A
A
50
40
30
400
B
300
200
C
D
I
OUT
(mA)
A
300
B
200
C
100
D
0
20
10
0
A: MAX1583X
B: MAX1583Y
C: MAX1583Z
3.0
3.3
3.6
100
I
LOAD
= 30mA
0
3.9
4.2
2.5
3.0
3.5
4.0
V
IN
(V)
4.5
5.0
5.5
2.5
3.0
3.5
4.0
V
IN
(V)
4.5
5.0
5.5
INPUT VOLTAGE (V)
_______________________________________________________________________________________
3
White LED Camera-Flash
Boost Converter
MAX1583
Typical Operating Characteristics (continued)
(V
IN
= 3.3V, C
RES
= 10µF, MAX1583Y, 4 LEDs in a 2 x 2 array, T
A
= +25°C, unless otherwise noted.)
MAXIMUM BOOST OUTPUT CURRENT
vs. INPUT VOLTAGE (MAX1583Z)
400
350
300
I
OUT
(mA)
250
200
150
100
50
0
2.5
3.0
3.5
4.0
V
IN
(V)
4.5
5.0
B
C
D
5.5
A: 1 LED
B: 2 LEDs
C: 3 LEDs
D: 4 LEDs
MAX1583 toc04
STROBE-MODE LED CURRENT
vs. STB RESISTANCE
MAX1583 toc05
MOVIE-MODE LED CURRENT
vs. MOV RESISTANCE
MAX1583 toc06
450
350
300
LED CURRENT (mA)
250
200
150
100
50
0
2
4
6
8
10
120
100
LED CURRENT (mA)
80
60
40
20
0
A
12
0
2
4
6
R
MOV
(kΩ)
8
10
12
R
STB
(kΩ)
STROBE STANDBY-MODE INPUT CURRENT
vs. INPUT VOLTAGE (PRECHARGE DONE)
MAX1583 toc07
SWITCHING WAVEFORMS IN
MOVIE MODE
MAX1583 toc08
2500
2000
INPUT CURRENT (μA)
MAX1583Z
MAX1583Y
I
L
200mA/div
1500
1000
V
OUT
AC-COUPLED
50mV/div
500
MAX1583X
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
V
LX
5V/div
4μs/div
INPUT VOLTAGE (V)
SWITCHING WAVEFORMS DURING
PRECHARGE MODE
MAX1583 toc09
SWITCHING WAVEFORMS IN
STANDBY MODE
MAX1583 toc10
I
L
500mA/div
I
L
500mA/div
V
OUT
AC-COUPLED
500mV/div
V
OUT
AC-COUPLED
500mV/div
V
LX
10V/div
V
LX
10V/div
1μs/div
4ms/div
4
_______________________________________________________________________________________
White LED Camera-Flash
Boost Converter
MAX1583
Typical Operating Characteristics (continued)
(V
IN
= 3.3V, C
RES
= 10µF, MAX1583Y, 4 LEDs in a 2 x 2 array, T
A
= +25°C, unless otherwise noted.)
SWITCHING WAVEFORMS IN
STROBE MODE
MAX1583 toc11
PRECHARGE-CYCLE
WAVEFORMS (MAX1583X)
MAX1583 toc12
PRECHARGE-CYCLE
WAVEFORMS (MAX1583Y)
MAX1583 toc13
V
POK
5V/div
100mA/div
V
POK
5V/div
V
POK
5V/div
I
LED
I
IN
V
OUT
10V/div
1A/div
I
IN
500mA/div
10V/div
500mA/div
I
IN
20μs/div
500μs/div
V
OUT
V
OUT
10V/div
500μs/div
PRECHARGE-CYCLE
WAVEFORMS (MAX1583Z)
MAX1583 toc14
STROBE-PULSE WAVEFORMS
(MAX1583X)
MAX1583 toc15
V
POK
5V/div
I
IN
1A/div
I
LED
I
IN
200mA/div
V
OUT
10V/div
V
OUT
500μs/div
10ms/div
100mA/div
10V/div
STROBE-PULSE WAVEFORMS
(MAX1583Y)
MAX1583 toc16
STROBE-PULSE WAVEFORMS
(MAX1583Z)
MAX1583 toc17
I
IN
500mA/div
I
IN
200mA/div
I
LED
I
LED
100mA/div
10V/div
V
OUT
C
RES
= 100μF
10ms/div
10ms/div
V
OUT
C
RES
= 200μF
100mA/div
10V/div
_______________________________________________________________________________________
5
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