MAXIM MAX16823AUE+

19-0733; Rev 2; 10/08
KIT
ATION
EVALU
LE
B
A
IL
A
AV
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
Features
The MAX16823 three-channel LED driver operates from a
5.5V to 40V input voltage range and delivers up to 100mA
per channel to one or more strings of high-brightness
LEDs (HBLEDs). Each channel’s current is programmable
using an external current-sense resistor in series with the
LEDs. Three DIM inputs allow a wide range of independent pulsed dimming in addition to providing the on and
off control of the outputs. Wave-shaping circuitry reduces
EMI while providing fast turn-on and turn-off times.
The MAX16823 is well suited for automotive applications
requiring a high-voltage input and is able to withstand
load-dump events up to 45V. On-board pass elements
minimize external components while providing ±5% LED
current accuracy. Additional features include an activehigh, open-drain LEDGOOD output for open LED detection, a +3.4V (±5%) regulated output with 4mA output
current capability, short-circuit and thermal protections.
The MAX16823 is available in thermally enhanced 5mm x
5mm, 16-pin TQFN-EP and 16–pin TSSOP-EP packages
and is specified over the -40°C to +125°C automotive
temperature range.
o 5.5V to 40V Operating Range
o Adjustable Constant Output Current
(5mA to 100mA and Up to 2A with External BJT)
o ±5% Output Current Accuracy
o Open LED Detection
o Three Independent High-Voltage DIM Inputs
o Three Integrated Pass Elements with Low
Dropout Voltage (0.7V max)
o Undervoltage Lockout
o Output Short-Circuit Protection
o 3.4V Voltage Regulator with 4mA Capability
o Accurate, Low 203mV Current Sense
o Overtemperature Shutdown
o -40°C to +125°C Operating Temperature Range
Ordering Information
Applications
Automotive Exterior: Rear Combination Lights
(RCLs), CHMSL
Automotive Interior: RGB Ambient Lighting,
Cluster Lighting, and LCD Backlighting
Emergency Vehicle Warning Lights
Navigation and Marine Indicators
Architectural and Industrial Lighting
PART
TEMP RANGE
PIN-PACKAGE
MAX16823ATE+
-40°C to +125°C
16 TQFN-EP*
MAX16823AUE+
-40°C to +125°C
16 TSSOP-EP*
+Denotes a lead-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configurations appear at end of data sheet.
Typical Operating Circuit
VIN
IN
CIN
IN
OUT1
MAX16823
IN
OUT2
OUT3
DIM1
DIM2
DIM3
REG
RLEDGOOD
CS1
LEDGOOD
CLGC
CREG
LGC
CS2
REG
CS3
GND
CS1
CS2
CS3
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
MAX16823
General Description
MAX16823
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
ABSOLUTE MAXIMUM RATINGS
IN to GND ...............................................................-0.3V to +45V
OUT1, OUT2, OUT3, DIM1, DIM2,
DIM3 to GND ...........................................-0.3V to (VIN + 0.3V)
REG, LGC, LEDGOOD to GND ................................-0.3V to +6V
CS1, CS2, CS3 to GND .........................................-0.3V to +0.5V
OUT1, OUT2, OUT3 Short Circuited
to GND Duration (VIN + 16V) ..........................................60min
Maximum Current into Any Pin
(except IN, OUT1, OUT2, OUT3)..................................±20mA
Continuous Power Dissipation (TA = +70°C)
16-Pin TQFN 5mm x 5mm
(derate 33.3mW/°C above +70°C) .........................2666mW
16-Pin TSSOP (derate 26.1mW/°C above +70°C) ....2088.8mW
Operating Temperature Range .........................-40°C to +125°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
(VIN = 12V, CREG = 0.1µF, IREG = 0, CLGC = 15nF, VDIM1 = VDIM2 = VDIM3 = 3.4V, RCS_ = 2.85Ω from CS_ to GND, TJ = TA = -40°C
to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
Supply Voltage Range
Undervoltage Lockout
Ground Current
Guaranteed Output Current
UVLO
IG
MIN
TYP
5.5
V
4.9
5.4
VIN falling
4.0
4.6
5.2
1.5
3
IOUT1 = IOUT2 = IOUT3 = 70mA
100
V
mA
mA
5
%
IOUT_ = 70mA, 6.5V ≤ VIN ≤ 40V
0.3
0.7
IOUT_ = 70mA, 5.5V ≤ VIN ≤ 6.5V
0.3
0.8
8
mA/µs
VOUT_ = 0V
180
mA
Output Current Slew Rate
Short-Circuit Current
UNITS
40
4.4
5mA ≤ IOUT_ ≤ 70mA
∆VDO
MAX
VIN rising
IOUT
LED Current-Sense Accuracy
Dropout Voltage (Note 2)
CONDITIONS
VIN
V
LEDGOOD
LEDGOOD Output Logic Low
VOL
ISINK = 2mA
LGC Pullup Resistor
65
100
0.4
V
135
kΩ
LGC Input Upper Threshold
VUTH
2.53
LGC Input Lower Threshold
VLTH
0.8
V
20
mA
LGC Pulldown Current
VLGC > VUTH
LGC Clock Period
CLGC = 15nF
0.77
1.5
V
2.3
ms
-0.1
+0.1
µA
2.4
VIN
V
DIMMING INPUT (DIM1, DIM2, DIM3)
DIM_ Logic-Input Bias Current
IDIM_
DIM_ Input-Voltage High
DIM_ Input-Voltage Low
DIM_ Frequency
0
0.6
V
3
kHz
28
µs
OUTPUTS (OUT1, OUT2, AND OUT3) (Note 3)
Turn-On Time
DIM_ rising edge to 90% of OUT_ current
12
Turn-Off Time
DIM_ falling edge to 10% of OUT_ current
8
18
µs
Output Current Rise Time
10% to 90%
7
18
µs
Output Current Fall Time
90% to 10%
6
15
µs
2
_______________________________________________________________________________________
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
(VIN = 12V, CREG = 0.1µF, IREG = 0, CLGC = 15nF, VDIM1 = VDIM2 = VDIM3 = 3.4V, RCS_ = 2.85Ω from CS_ to GND, TJ = TA = -40°C
to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
193
203
213
mV
+1.2
µA
CURRENT SENSE
Regulated CS_ Voltage
VCS_
5mA ≤ IOUT_ ≤ 70mA
Input Current (CS1, CS2, CS3)
Current out of CS_
OVERTEMPERATURE PROTECTION (Note 4)
Thermal Shutdown Temperature
155
°C
Thermal Shutdown Hysteresis
23
°C
3.4V REGULATOR (REG)
Output Voltage
VREG
REG Short-Circuit Current
0 ≤ IREG ≤ 4mA
3.275
3.41
3.547
3.221
3.38
3.547
VREG = 0V
13
V
mA
Note 1: All devices 100% production tested at TJ = +25°C. Limits over the operating temperature range are guaranteed by design.
Note 2: Dropout is measured as follows: Connect a resistor from OUT_ to CS_. Connect RCS_ = 2.85Ω from CS_ to GND.
Set VIN = VOUT + 3V (record VOUT as VOUTA). Reduce VIN until VOUT = 0.97 x VOUTA (record as VINB and VOUTB).
VDO = VINB - VOUTB.
Note 3: Output current rise and fall times are measured with a 62Ω series resistor from OUT_ to CS_.
Note 4: Overtemperature protection does not function if the output of the 3.4V reference (REG) is shorted to ground.
Typical Operating Characteristics
(VIN = 12V, CREG = 0.1µF, IREG = 0, VLGC = unconnected, connect RCS_ = 2.85Ω from CS_ to GND. Connect OUT_ to CS_ through
a resistor, TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.)
VCS_ vs. OUTPUT CURRENT
50
ILOAD = 35mA
90
80
OUTPUT CURRENT (mA)
0.208
ILOAD = 70mA
60
40
0.209
0.207
VCS_ (V)
OUTPUT CURRENT (mA)
80
OUTPUT CURRENT vs. INPUT VOLTAGE
100
MAX16823 toc02
MAX16823 toc01
90
70
0.210
0.206
0.205
0.204
60
50
40
0.203
20
0.202
20
0.201
10
0.200
0
ILOAD = 5mA
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C )
0
10
20
30
40
50
OUTPUT CURRENT (mA)
60
70
IOUT = 70mA
70
30
10
MAX16823 toc03
OUTPUT CURRENT vs. TEMPERATURE
100
30
IOUT = 5mA
0
5
10
15 20 25 30
INPUT VOLTAGE (V)
35
_______________________________________________________________________________________
40
3
MAX16823
ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics (continued)
(VIN = 12V, CREG = 0.1µF, IREG = 0, VLGC = unconnected, connect RCS_ = 2.85Ω from CS_ to GND. Connect OUT_ to CS_ through
a resistor, TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.)
0.7
0.6
0.5
0.4
ILOAD = 70mA
0.3
0.2
VIN = 40V
VIN = 20V
1.1
1.0
0.9
0.8
VIN = 12V
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
VREG vs. VIN
330Hz DIMMED OPERATION
MAX16823 toc09
MAX16823 toc08
3.44
3.43
ILOAD = 70mA
VIN = 12V, DIM
PULSED AT 33Hz
(1% DUTY CYCLE)
VREG (V)
3.42
ILOAD = 70mA
ILOAD = 1mA
3.0
3.45
MAX16823 toc07
ILOAD = 4mA
3.2
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
VCS_ vs. IREG
0.210
0.209
0.208
0.207
0.206
0.205
0.204
0.203
0.202
0.201
0.200
0.199
0.198
0.197
0.196
0.195
3.3
3.1
VIN = 5.5V
0.6
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
VDIM
2V/div
IREG = 0
3.41
0V
ILED
50mA/div
3.40
3.39
IREG = 1mA
3.38
0A
IREG = 4mA
3.37
3.36
3.35
0
1
2
3
4 5 6
IREG (mA)
7
8
9
10
0
5
10
15
20 25
VIN (V)
35
20µs/div
40
LEDGOOD RESPONSE TIMES
MAX16823 toc11
MAX16823 toc10
VDIM
2V/div
MAX16823 toc12
VIN = 12V
CLGC = 15nF
ILOAD = 70mA
VIN = 12V, DIM
PULSED AT 200Hz
(50% DUTY CYCLE) VDIM
2V/div
ILOAD = 70mA
0A
VIN = 12V, DIM
PULSED AT 200Hz
(50% DUTY CYCLE)
VLGC
5V/div
0V
0A
10µs/div
VDIM
5V/div
0V
VLEDGOOD
5V/div
0V
0V
ILOAD
50mA/div
0V
ILOAD
50mA/div
10µs/div
30
200Hz DIMMED OPERATION (EXPANDED)
200Hz DIMMED OPERATION (EXPANDED)
4
3.4
1.2
0.7
0.1
ILOAD = 0
VREG (V)
SUPPLY CURRENT (mA)
DROPOUT VOLTAGE (mV)
0.8
VDIM1 = VDIM2 = VDIM3 = 0V
1.3
3.5
MAX16823 toc05
MAX16823 toc04
0.9
VREG vs. TEMPERATURE
SUPPLY CURRENT vs. TEMPERATURE
1.4
MAX16823 toc06
DROPOUT VOLTAGE vs. TEMPERATURE
1.0
VCS_ (V)
MAX16823
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
2ms/div
_______________________________________________________________________________________
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
PIN
NAME
FUNCTION
TQFN
TSSOP
1
3
DIM1
Dimming Input 1. DIM1 is a low-frequency dimming input for channel 1. A logic-low turns off
OUT1 and a logic-high turns on OUT1.
2
4
DIM2
Dimming Input 2. DIM2 is a low-frequency dimming input for channel 2. A logic-low turns off
OUT2 and a logic-high turns on OUT2.
3
5
DIM3
Dimming Input 3. DIM3 is a low-frequency dimming input for channel 3. A logic-low turns off
OUT3 and a logic-high turns on OUT3.
4
6
LEDGOOD
5, 6, 7
7, 8, 9
IN
8
10
LGC
LED Detection-Timing Setting. Connect a capacitor from LGC to ground to set the delay time
for LEDGOOD.
9
11
REG
3.4V Voltage Regulator. Connect a 0.1µF capacitor from REG to GND.
10
12
GND
Ground
Open LED Output. LEDGOOD is an open-drain output. A logic-high indicates the LED
connection is good in all three channels. A logic-low indicates an open LED connection. See the
LEDGOOD section.
Positive Input Supply. Bypass with a 0.1µF (min) capacitor to GND. Connect all IN
pins together.
11
13
CS3
Channel 3 Sense Amplifier Positive Input. Connect the current-sense resistor between CS3
and GND to program the output current level for channel 3.
12
14
CS2
Channel 2 Sense Amplifier Positive Input. Connect the current-sense resistor between CS2
and GND to program the output current level for channel 2.
13
15
CS1
Channel 1 Sense Amplifier Positive Input. Connect the current-sense resistor between CS1
and GND to program the output current level for channel 1.
14
16
OUT3
Current Regulator Output 3
15
1
OUT2
Current Regulator Output 2
16
2
OUT1
EP
EP
EP
Current Regulator Output 1
Exposed Pad. Connect EP to a large-area ground plane for effective power dissipation. Do not
use as the IC ground connection.
_______________________________________________________________________________________
5
MAX16823
Pin Description
MAX16823
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
Detailed Description
The MAX16823 three-channel current regulator operates
from a 5.5V to 40V input voltage range and delivers up
to 100mA per channel to one or more strings of
HBLEDs. The output currents are programmable using
external current-sense resistors in series with the LEDs.
Three DIM inputs allow a wide range of independent
pulsed dimming in addition to providing the on and off
control of the outputs. The MAX16823 offers an LEDGOOD output that indicates an open-circuit condition
when one or more LED channels are open.
Integrated pass elements minimize external components while providing ±5% output current accuracy.
Additional features include a 3.4V (±5%) voltage regulator with 4mA output current capability, short-circuit and
thermal protection.
The MAX16823 uses a feedback loop to linearly control
the current from each output. The voltage across each
sense resistor is compared to a fixed reference voltage
and the error is amplified to drive the internal power
pass device for a particular channel. See the Block
Diagram. The regulation point is factory-set at 203mV.
The regulated current is adjusted by the value of
RCS__.
The MAX16823 is a constant-current LED driver internally optimized for driving the impedance range
expected from one or more HBLEDs.
3.4V Regulator (REG)
The MAX16823 includes a fixed 3.4V voltage regulator
that delivers up to 4mA of load current for auxiliary
applications throughout the 5.5V to 40V input voltage
range. Connect a 0.1µF compensation capacitor from
REG to ground. Shorting REG to ground disables the
thermal shutdown.
Thermal Protection
The MAX16823 enters a thermal-shutdown mode in the
event of overheating. This typically occurs in overload or
output short-circuit conditions. When the junction temperature exceeds TJ = +155°C, the internal thermal protection circuitry turns off the series pass elements. The
MAX16823 recovers from thermal-shutdown mode once
the junction temperature drops by 23°C. The part will
therefore protect itself by low-frequency thermal cycling
in the event of a short-circuit or overload condition.
6
Applications Information
Programming the LED Current
The MAX16823 uses sense resistors to set the output
current for each channel. To set the LED current for a
particular channel, connect a sense resistor across the
corresponding current-sense input (CS_) and GND. For
optimal accuracy, connect the low-side of the currentsense resistors to the IC’s ground pin with short traces.
The value needed for the sense resistor for a given current can be calculated with the equation below:
RCS _ (Ω) =
VCS _ (V)
IOUT _ (A)
where VCS_ is 203mV and IOUT_ is the desired LED
current (ILED).
Input-Voltage Considerations
For proper operation, the minimum input voltage must
always be:
VIN(MIN) ≥ VCS _(MAX) + VFT(MAX) + VDO(MAX)
where VFT(MAX) is the total forward voltage of all seriesconnected LEDs. The minimum operating voltage of
the device is 5.5V.
LEDGOOD
The MAX16823 features an active-low, open-drain
LEDGOOD output that goes low either when one or
more LED channels are open or when a signal at any of
the dimming inputs remains low for a period greater
than the programmed LEDGOOD delay time tDELAY.
Program tDELAY with a capacitor connected between
LGC and ground. The LEDGOOD output goes low after
the programmed delay period tDELAY has elapsed. Use
the following formula to set the delay period:
tDELAY = 257,900(Ω) × CLGC (F)
where CLGC is the capacitor connected between LGC
and ground. The LEDGOOD output goes low during
the thermal shutdown.
_______________________________________________________________________________________
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
REG
UVLO
IN
IN
I_REG
IN
IN
OUT1
BANDGAP
CS1
GND
DIM1
IN
MAX16823
THERMAL
SHUTDOWN
I_REG
OUT2
DIM2
CS2
IN
I_REG
OUT3
DIM3
CS3
LEDGGOOD
LGC
LEDGOOD
DETECTOR
Pulse-Dimming Inputs (DIM_)
The MAX16823 features pulsed or chopped-current
dimming inputs (DIM_) to chop the LED current and to
adjust the brightness. DIM_ also serves as an activehigh enable input. A logic-low at DIM_ turns off OUT_
and a logic-high turns on OUT_. If the signal at DIM
stays low more than the programmed LEDGOOD delay
time, LEDGOOD goes low (Figure 1).
Two Brightness Levels for
TAIL/STOP Lights
Figure 2 shows the PWM dimming operation for the
MAX16823 with an ICM7555 timer. The ICM7555 provides an adjustable duty cycle using two external resistors and a capacitor. In TAIL operation, the output of
the ICM7555 feeds into DIM and lights up the LEDs.
The LED’s brightness depends on the duty cycle of the
_______________________________________________________________________________________
7
MAX16823
Block Diagram
MAX16823
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
ICM7555. When VSTOP is present, DIM is pulled up to
VSTOP. The PWM dimming operation is disabled and
the LEDs light up to full brightness. See the ICM7555
data sheet for formulas to calculate the dimming frequency and the duty cycle.
Outputs Latch-Off
Figure 3 shows a circuit with DIM1, DIM2, DIM3, and
LEDGOOD connected through a resistor to VREG. This
circuit is useful for applications that require all outputs
to latch off when one of the LEDs opens. The
MAX16823 resumes current regulation again through
power cycling, once the fault condition is removed.
Other Applications
The application circuit in Figure 4 implements a twolevel brightness current for TAIL/STOP lights. In TAIL
operation, Q1 is off and RCS1 sets the output current. In
STOP operation, Q1 turns on and the output current is
set by a parallel combination of RCS1 and R2.
Figure 5 shows an application circuit with the
MAX16823 using a single BJT to provide high output
current. For proper operation:
VIN(MIN) > VBE(MAX) + VFT(MAX) + VCS _ + VDO(MAX)
For minimized dropout, the LEDs can be placed in the
collector.
tON
DIM
tOFF
LEDGOOD GOES
LOW WHEN tOFF > tDELAY
LEDGOOD
Figure 1. LEDGOOD Timing Delay
STOP
D1
TAIL
OUT3
OUT2
IN
D4
OUT1
C1
R1
REG
0.1µF
R2
D2
DIM1
CS1
IN
DIS
RCS1
DIM2
OUT
R3
D3
TH
TRG
GND
LEDs
MAX16823
CS2
100kΩ
DIM3
RCS2
C2
ICM7555
CS3
GND
Figure 2. PWM Dimming Operation with ICM7555
8
_______________________________________________________________________________________
RCS3
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
MAX16823
VIN
OUT3
OUT2
IN
CIN
VREG
OUT1
R1
LEDs
MAX16823
DIM1
LEDs
CS1
DIM2
LEDs
RCS1
DIM3
CS2
LEDGOOD
RCS2
REG
CS3
GND
CREG
RCS3
Figure 3. Output_ Latch-Off
STOP
D1
OUT3
OUT2
D2
IN
TAIL
TAIL
STOP/TAIL
OUT1
TAIL
LEDs
MAX16823
DIM1
CS1
LEDs
DIM2
R2
DIM3
CIN
LEDs
R3
RCS1
Q1
R1*
CS2
REG
CREG
RCS2
GND
CS3
RCS3
*R1 = 100kΩ
Figure 4. Two-Brightness Level with Current Level Switch for TAIL/STOP Lights
_______________________________________________________________________________________
9
MAX16823
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
Preload Current
Figure 6 shows the MAX16823 with a preload circuit. In
the circuit, the BJT, RPRELOAD, and REG generate a
preset load current. The preset load current IPRESET is
determined with the following formula:
VIN
Q1
OUT_
IN
CIN
V
− 0.7V
IPRESET = REG
RPRELOAD
REG
C2
LEDs
MAX16823
PWM DIMMING
This circuit is used with older body controllers that
monitor minimum RCL current to detect failures.
DIM_
CS_
RCS_
GND
Figure 5. Increased LED Current (Amper Range) with a Single
BJT
STOP
TAIL
CIN
TAIL
IN
OUT1
IN
OUT2
IN
OUT3
DIM1
DIM2
TAIL
STOP
MAX16823
100kΩ
DIM3
CS1
100kΩ
LGC
CS2
REG
CLGC
RPRELOAD
CS3
CREG
GND
RCS1
RCS2
Figure 6. Preload Current Setting
10
______________________________________________________________________________________
RCS3
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
CS2
CS3
GND
REG
TOP VIEW
12
11
10
9
TOP VIEW
OUT2 1
8
CS1 13
+
16 OUT3
OUT1 2
LGC
15 CS1
DIM1 3
7
OUT3 14
MAX16823
OUT2 15
OUT1 16
6
*EP
+
5
IN
DIM2 4
IN
2
3
4
DIM1
DIM2
DIM3
LEDGOOD
13 CS3
DIM3 5
12 GND
LEDGOOD 6
11 REG
IN
IN 7
IN 8
1
14 CS2
MAX16823
10 LGC
*EP
9 IN
TSSOP
*EP = EXPOSED PAD.
TQFN
Chip Information
PROCESS: BiCMOS-DMOS
Package Information
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages.
PACKAGE TYPE
PACKAGE CODE
DOCUMENT NO.
16 TQFN
T1655-3
21-0140
16 TSSOP
U16E-3
21-0108
______________________________________________________________________________________
11
MAX16823
Pin Configurations
MAX16823
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
Revision History
REVISION
NUMBER
REVISION
DATE
0
1/07
Initial release
1
3/07
Released TQFN package.
2
10/08
Updated General Description, Features, EC table, and Detailed Description.
DESCRIPTION
PAGES
CHANGED
—
1
1, 2, 6
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
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