MAX1947ETA18 [MAXIM]
Low Input/Output Voltage Step-Up DC-DC Converter with RESET; 低输入/输出电压，升压型DC- DC转换器，复位
| 型号： | MAX1947ETA18 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Low Input/Output Voltage Step-Up DC-DC Converter with RESET |
| 文件： | 总10页 (文件大小：816K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-3086; Rev 0; 5/04
Low Input/Output Voltage
Step-Up DC-DC Converter with RESET
General Description
Features
The MAX1947 is a compact, high-efficiency, step-up DC-
DC converter that regulates output voltages from 1.8V to
3.3V to power µP/DSP cores, memory, and I/O rails in 1-
and 2-cell alkaline/NiMH/NiCd battery-powered systems.
It features an internal 800mA switch and synchronous
rectifier to achieve up to 94% efficiency and to eliminate
the need for an external Schottky diode.
♦ Low Input (0.7V) and Output (1.8V) Voltage
Capability
♦ Internal Synchronous Rectifier
♦ High 94% Efficiency
♦ Fixed Output Voltages: 1.8V, 2.5V, 3V, and 3.3V
High-frequency switching (up to 2MHz) results in low
ripple and small external components, while automatic
pulse skipping at light loads reduces supply current to
just 70µA for extended battery life. Maxim’s proprietary
True Shutdown™ reduces supply current to just 2µA
and fully discharges the output to ground. The convert-
er is offered in fixed-output voltages of 1.8V, 2.5V, 3.0V,
and 3.3V, requiring no feedback or compensation net-
work. A 75ms RESET output flag provides for power-on
reset (POR) and undervoltage detection. The MAX1947
is available in a space-saving 8-pin TDFN package.
♦ Up to 2MHz Switching Allows Small External
Components and Low Output Ripple
♦ Automatic Pulse Skipping at Light Loads for
Extended Battery Life
♦ Low 70µA (typ) Operating Supply Current
(Measured at OUT)
♦ Low 2µA Logic-Controlled Shutdown
♦ True Shutdown Fully Discharges Output to
Ground
Applications
♦ Uses Only Small Ceramic Capacitors
MP3 Players, Pagers, and CD Players
♦ 75ms RESET Output Flag
PDAs and Organizers
Ordering Information
Digital Still Cameras
Cordless Phones
PART
TEMP RANGE PIN-PACKAGE
Wireless Mice/Keyboards
Portable Medical Equipment
Other Battery-Powered Systems
MAX1947ETAxy* -40°C to +85°C 8 TDFN 3mm x 3mm
*xy represents the output voltage code (e.g., 18 =1.8V).
Standard output voltages include 3.3V (33), 3.0V (30), 2.5V
(25), and 1.8V (18). Contact the factory for other output voltages
in 100mV increments between 1.8V and 3.3V; the minimum
order quantity is 25,000 units.
Typical Application Circuit
Pin Configuration
V
IN
4.7µH
+0.7V TO +V
OUT
TOP VIEW
2.2µF
V
LX
OUT
RESET
GND
1
2
3
4
8
7
6
5
BATT
OUT
LX
+1.8V, +2.5V,
+3.0V, +3.3V
BATT
OUT
MAX1947
10µF
GND
MAX1947
SHDN
PGND
SHDN
PGND
RESET
GND
TDFN
3mm x 3mm
True Shutdown 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.
Low Input/Output Voltage
Step-Up DC-DC Converter with RESET
ABSOLUTE MAXIMUM RATINGS
Operating Temperature Range ...........................-40°C to +85°C
BATT, OUT, SHDN to GND ...................................-0.3V to +4.0V
RESET to GND..........................................-0.3V to (V + 0.3V)
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
OUT
PGND to GND .......................................................-0.3V to +0.3V
Switch Current (I , I , I ) (Note 1) .................-1A to +1A
LX OUT PGND
Continuous Power Dissipation (T = +70°C)
A
8-Pin TDFN (derate 24.4mW/°C
above +70°C)..........................................................1951.2mW
Note 1: LX has internal clamp diodes to PGND and OUT. Applications that forward bias these diodes should take care not to exceed the
IC’s package power-dissipation limits.
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
= 1.5V, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.) (Note 2)
BATT
A
A
PARAMETER
CONDITIONS
= 1kΩ, T = +25°C
MIN
TYP
MAX
UNITS
Minimum Startup Voltage
R
LOAD
0.8
0.95
V
A
Startup-Voltage Temperature
Coefficient
-2.1
mV/°C
Maximum Input Operating
Voltage
(Note 3)
3.6
V
V
Minimum Input Operating Voltage
0.7
1.8
2.5
3.0
3.3
1.2
273
214
185
169
380
361
329
2
MAX1947ETA18, I
MAX1947ETA25, I
MAX1947ETA30, I
MAX1947ETA33, I
= 40mA
= 32mA
= 25mA
= 25mA
1.74
2.42
2.9
1.86
2.58
3.1
LOAD
LOAD
LOAD
LOAD
Output Voltage
V
3.2
3.4
Load Regulation
No load to full load
%
MAX1947ETA18
MAX1947ETA25
MAX1947ETA30
MAX1947ETA33
MAX1947ETA25
MAX1947ETA30
MAX1947ETA33
160
130
100
100
240
200
200
V
= 1V
BATT
Full-Load Output Current
mA
V
= 1.8V
BATT
Supply Current into BATT
Supply Current into OUT
No switching
No switching
4
µA
µA
µs
µs
70
110
1.3
0.3
LX Switch Maximum On-Time
LX Switch Minimum Off-Time
0.7
0.2
1
0.25
Maximum On-Time to Minimum
Off-Time Ratio
3.6
4
4.6
Frequency in Startup
650
kHz
2
_______________________________________________________________________________________
Low Input/Output Voltage
Step-Up DC-DC Converter with RESET
ELECTRICAL CHARACTERISTICS (continued)
(V
= 1.5V, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.) (Note 2)
BATT
A
A
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Startup to Normal-Mode Output
Transition Voltage
50mV hysteresis, rising edge
1.40
1.62
1.73
V
T
T
T
T
= 0°C to +85°C
= -40°C to +85°C
= 0°C to +85°C
= -40°C to +85°C
600
580
15
800
800
75
1000
1000
150
150
0.6
A
A
A
A
NFET Current Limit
mA
mA
PFET Turn-Off Current
10
75
MAX1947ETA18
MAX1947ETA25
MAX1947ETA30
MAX1947ETA33
MAX1947ETA18
MAX1947ETA25
MAX1947ETA30
MAX1947ETA33
0.3
0.22
0.17
0.15
0.5
0.44
0.34
0.3
Internal NFET
On-Resistance
I
= 100mA
= 100mA
Ω
Ω
LX
LX
1.0
0.35
0.28
0.25
0.1
0.7
Internal PFET
On-Resistance
I
0.56
0.5
T
A
T
A
= +25°C
= +85°C
1
SHDN = GND, V
V
= 0V,
OUT
LX Leakage Current
µA
µA
V
= 3.6V
LX
1
SHUTDOWN MODE
Shutdown Supply Current
SHDN = GND
2
4
0.8 x
V
V
IH
IL
V
BATT
SHDN Input Voltage
0.18 x
V
BATT
SHDN = OUT or GND, T = +25°C
1
5
100
1000
93
A
SHDN Input Bias Current
nA
SHDN = OUT or GND, T = +85°C
A
OUT Discharge Resistance in
Shutdown
SHDN = GND
500
Ω
RESET OUTPUT
Reset OUT Voltage Trip Level
V
falling, 1% hysteresis
87
0.9
65
90
%
V
OUT
Minimum V
for Valid Reset
OUT
Reset Timeout
140
235
0.3
ms
I
I
= 200µA
SINK
RESET Output Voltage
V
= 200µA
0.8xV
OUT
SOURCE
Note 2: Limits are 100% production tested at T = +25°C. Limits over the operating temperature range are guaranteed by design.
A
Note 3: When BATT is greater than the output-voltage set point, the part is in track mode (see the Track Mode section).
_______________________________________________________________________________________
3
Low Input/Output Voltage
Step-Up DC-DC Converter with RESET
Typical Operating Characteristics
(V = 1.5V, Circuit of Typical Application Circuit, T = +25°C, unless otherwise noted.)
IN
A
MAX1947ETA18
EFFICIENCY vs. LOAD CURRENT
MAX1947ETA25
EFFICIENCY vs. LOAD CURRENT
MAX1947ETA30
EFFICIENCY vs. LOAD CURRENT
100
95
90
85
80
75
70
65
60
100
100
95
90
85
80
75
70
65
60
V
= 1.8V
IN
V
= 2.5V
95
90
85
80
75
70
65
60
IN
V
= 1.6V
V
= 1.6V
IN
IN
V
= 1.25V
IN
V
= 1.25V
IN
V
= 1.25V
IN
V
= 1V
V
= 1V
IN
IN
V
= 1V
IN
0.1
1
10
100
1000
0.1
1
10
100
1000
0.1
1
10
100
1000
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
MAX1947ETA33
EFFICIENCY vs. LOAD CURRENT
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
NO-LOAD INPUT CURRENT
vs. INPUT VOLTAGE
100
95
90
85
80
75
70
65
60
1200
1000
800
600
400
200
0
600
V
= 2.5V
IN
V
= 3.0V
OUT
V
= 1.8V
500
400
300
200
100
0
IN
V
= 3.3V
OUT
V
= 2.5V
OUT
V
= 1.8V
OUT
V
= 1.8V
OUT
V
= 2.5V
OUT
V
= 1V
100
IN
V
= 1.25V
IN
V
= 3.3V
2.7
OUT
0.7
1.2
1.7
2.2
3.2
3.7
0.7
1.2
1.7
2.2
2.7
3.2
3.7
0.1
1
10
LOAD CURRENT (mA)
1000
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
STARTUP VOLTAGE
vs. TEMPERATURE
STARTUP VOLTAGE
vs. LOAD CURRENT
SHUTDOWN THRESHOLD
vs. INPUT VOLTAGE
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
V
= 3.0V
= 3.3V
OUT
R
= 1kΩ
LOAD
V
= 1.8V
OUT
V
= 2.5V
OUT
V
R
LOAD
= 0Ω
OUT
0
20
40
60
80 100 120 140
-40
-15
10
35
60
85
0.7
1.2
1.7
2.2
2.7
3.2
3.7
LOAD CURRENT (mA)
TEMPERATURE (°C)
INPUT VOLTAGE (V)
4
_______________________________________________________________________________________
Low Input/Output Voltage
Step-Up DC-DC Converter with RESET
Typical Operating Characteristics (continued)
(V = 1.5V, Circuit of Typical Application Circuit, T = +25°C, unless otherwise noted.)
IN
A
OUTPUT VOLTAGE
vs. TEMPERATURE
OUTPUT VOLTAGE
vs. LOAD CURRENT
NO-LOAD OUTPUT VOLTAGE
vs. INPUT VOLTAGE
1.84
1.84
1.82
1.80
1.78
1.76
1.74
1.84
1.82
1.80
1.78
1.76
1.74
1.82
1.80
1.78
1.76
1.74
I
= 40mA
60
LOAD
0
50 100 150 200 250 300 350
LOAD CURRENT (mA)
0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7
INPUT VOLTAGE (V)
-40
-15
10
35
85
TEMPERATURE (°C)
HEAVY-LOAD SWITCHING WAVEFORMS
LIGHT-LOAD SWITCHING WAVEFORMS
V
OUT
V
OUT
(AC-COUPLED)
50mV/div
50mV/div
2V/div
50mV/div
(AC-COUPLED)
V
IN
V
IN
50mV/div
2V/div
(AC-COUPLED)
(AC-COUPLED)
V
LX
V
LX
I
L
500mA/div
I
L
500mA/div
2µs/div
2µs/div
LINE-TRANSIENT WAVEFORMS
LOAD-TRANSIENT WAVEFORMS
1.5V
1V
200mA/div
V
I
LOAD
IN
V
V
OUT
(AC-COUPLED)
OUT
50mV/div
50mV/div
(AC-COUPLED)
10µs/div
10µs/div
_______________________________________________________________________________________
5
Low Input/Output Voltage
Step-Up DC-DC Converter with RESET
Typical Operating Characteristics (continued)
(V = 1.5V, Circuit of Typical Application Circuit, T = +25°C, unless otherwise noted.)
IN
A
EXITING AND ENTERING
SHUTDOWN WAVEFORMS
POWER-ON RESET WAVEFORMS
1V/div
1V/div
V
1V/div
1V/div
V
IN
OUT
V
V
RESET
RESET
V
V
OUT
1V/div
SHDN
1V/div
20ms/div
20ms/div
Pin Description
PIN
NAME
FUNCTION
Active-Low Push-Pull Reset Output. RESET goes high 75ms (min) after the output voltage has
exceeded 90% of its final value. The RESET output is valid for output voltages as low as 0.9V. RESET
is driven low in shutdown.
1
RESET
2
3
GND
GND
Ground. Connect to exposed paddle.
Ground. Connect to exposed paddle.
Shutdown Input. Connect to BATT or logic 1 for normal operation. Connect to GND or logic 0 for a low
quiescent-current shutdown mode.
4
5
6
SHDN
PGND
LX
Power Ground. Connect to exposed paddle.
Inductor Connection to the Drains of the Internal N-Channel Switch and P-Channel Synchronous
Rectifier
Regulator Output. Bypass with 10µF ceramic capacitor to GND for full-load capability. For less than
50% of full load, a 4.7µF capacitor can be used.
7
OUT
8
BATT
EP
Battery Connection. V
is used for the startup oscillator and to power the chip when V
< V
.
BATT
OUT
BATT
—
Exposed Paddle. Connect to GND and PGND.
increased with the low 70µA quiescent current and low
on-resistance of the internal n-channel MOSFET power
switch. The MAX1947 uses Maxim’s proprietary True
Shutdown circuitry, which disconnects the output from
the input in shutdown and actively discharges the
output to ground.
Detailed Description
The MAX1947 compact step-up DC-DC converter starts
up with voltages as low as 0.8V and operates with input
voltages down to 0.7V. An internal synchronous rectifier
reduces cost by eliminating the need for an external
Schottky diode and improves overall efficiency by
reducing losses in the circuit. The efficiency is further
6
_______________________________________________________________________________________
Low Input/Output Voltage
Step-Up DC-DC Converter with RESET
Functional Diagram
RESET
75ms TIMER
BATT
STARTUP
OSCILLATOR
0.9 x REF
OUT
SHDN
SHUTDOWN
CIRCUITRY
ERROR
AMPLIFIER
REF
P*
N
t
ON
MAX TIMER
CONTROL
LOGIC AND
GATE DRIVERS
t
OFF
ZERO-CROSSING
AMPLIFIER
LX
MIN TIMER
REF
PGND
CURRENT-LIMIT
AMPLIFIER
1.25V REFERENCE
(REF)
MAX1947
*BODY DIODE CONTROL
GND
V
> V
, V
> V
regulation point, and the
Control Scheme
BATT
OUT OUT
OUT
minimum off-time expires. During track mode, the syn-
chronous rectifier is turned on 100% of the time and the
output voltage tracks the battery voltage. Track mode is
The MAX1947 is a bootstrapped design. Upon turn-on,
a startup oscillator brings the output voltage high
enough to allow the main DC-DC circuitry to run. Once
the output voltage reaches 1.62V (typ) the main DC-DC
circuitry turns on and boosts the output voltage to the
final regulation point.
exited by V
falling below the V
regulation point.
OUT
OUT
Synchronous Rectification
The internal synchronous rectifier eliminates the need
for an external Schottky diode, reducing cost and board
space. During the cycle off-time, the p-channel MOSFET
turns on and shunts the MOSFET body diode. As a
result, the synchronous rectifier significantly improves
efficiency without the addition of an external compo-
nent. Conversion efficiency can be as high as 94%.
The unique minimum off-time, current-limited control
scheme is the key to the MAX1947’s low operating cur-
rent and high efficiency over a wide load range. The
architecture combines the high output power and effi-
ciency of a pulse-width modulation (PWM) device with
the ultra-low quiescent current of a traditional pulse-
skipping controller. The switching frequency can be as
high as 2MHz and depends upon the load current and
input voltage. The MAX1947 is designed to operate
using low-ESR ceramic capacitors, so output voltage
RESET
The MAX1947 features an active-low push-pull RESET
output for use with a microcontroller (µC). It signals the
µC when the MAX1947 output voltage is within operat-
ing limits. During startup, RESET is held low. When the
RESET threshold (90% of the output regulation voltage)
is reached, a 75ms (min) timer begins counting. RESET
is switched high once the timer expires.
ripple due to ESR is very small (approximately 10mV ).
P-P
Track Mode
The MAX1947 enters track mode when BATT is greater
than the output-voltage regulation point. Track mode
can only be entered under the following conditions:
_______________________________________________________________________________________
7
Low Input/Output Voltage
Step-Up DC-DC Converter with RESET
Table 1. Suggested Component Values
APPLICATION
LOAD
INPUT CAPACITOR (µF) OUTPUT CAPACITOR (µF)
INDUCTOR (µH)
≤50% full load
>50% full load
≤50% full load
>50% full load
≤50% full load
>50% full load
2.2
2.2
2.2
2.2
2.2
2.2
4.7
10
3.3
3.3
4.7
4.7
6.8
6.8
1-Cell Input,
Output < 2.7V
4.7
10
1-Cell Input,
Output > 2.7V
4.7
10
2-Cell Input
Table 2. Suggested Component Manufacturers
MANUFACTURER
PART
PART NUMBER
PHONE
WEBSITE
Sumida
Inductor
CDRH3D16 series
81-3-3667-3381
www.sumida.com
4.7µF JMK212BJ475MG,
10µF JMK212BJ106MG
Output capacitors
Input capacitors
Output capacitors
Input capacitors
Taiyo Yuden
TDK
408-573-4150
www.t-yuden.com
www.TDK.com
2.2µF LMK107BJ225MA
4.7µF C2012X5R0J475K,
10µF C2012X5R0J106K
888-835-6646
2.2µF C1608X5R03225M
2.2µH to 6.8µH range. Smaller inductance values typi-
cally offer a smaller physical size for a given series
resistance, allowing the smallest overall circuit dimen-
sions but with lower output-current capability. Circuits
using larger inductance values exhibit higher output-
current capability, but are larger for the same series
resistance and current rating.
Shutdown
The MAX1947 enters shutdown mode when SHDN is
driven low. During shutdown, the synchronous rectifier
disconnects the output from the input, eliminating the DC
conduction path that normally exists with traditional boost
converters in shutdown mode. The output is actively dis-
charged to ground through an internal 500Ω resistor. The
quiescent current is reduced to 2µA while in shutdown
mode. Drive SHDN high for normal operation. The output
reaches regulation approximately 650µs after SHDN
goes high.
The inductor’s incremental saturation current rating
should be greater than the peak switch-current limit.
However, it is generally acceptable to bias the inductor
into saturation by as much as 20%, although this
slightly reduces efficiency (see the Electrical
Characteristics for the MAX1947 NFET current limit).
Table 1 lists the suggested components for several typ-
ical applications. Also, the inductor’s DC resistance sig-
nificantly affects efficiency.
Applications Information
Inductor Selection
An inductor value of 4.7µH performs well in most appli-
cations. The MAX1947 also works with inductors in the
8
_______________________________________________________________________________________
Low Input/Output Voltage
Step-Up DC-DC Converter with RESET
Calculate the maximum output current (I
) using
Capacitor Selection
The MAX1947 is specifically designed for using small,
inexpensive, low-ESR ceramic capacitors. X5R and
X7R dielectrics are recommended when operating over
wide temperature ranges. Bypass the output of the
MAX1947 with 10µF when using maximum load cur-
rents. When using less than half the maximum load cur-
rent capability, the output capacitor can be reduced to
4.7µF. Bypass the input with a 2.2µF or larger ceramic
capacitor. Table 1 lists the suggested values for the
input and output capacitors for typical applications.
OUTMAX
) and duty cycle (D) as
inductor ripple current (I
follows:
RIPPLE
V
+ I
×(R
+R )−V
OUT LIM
DS(ON)PFET
(R
L
BATT
I
=
RIPPLE
+R )
DS(ON)PFET
L
L/t
+
OFF
2
I
RIPPLE
V
+(I
−
) ×
OUT LIM
PC Board Layout and Grounding
Careful printed circuit-board layout is important for min-
imizing ground bounce and noise. Keep the IC’s GND
pins and the ground leads of the input and output filter
capacitors very close together. Connect GND and
PGND directly to the exposed paddle. In addition, keep
all connections to the OUT and LX pins as short as pos-
sible. To maximize output power and efficiency and
minimize output ripple voltage, use short, wide traces
from the input and output. A sample layout is available
in the MAX1947 evaluation kit.
2
(R
+R ) −V
DS(ON)PFET
L
BATT
D=
I
RIPPLE
2
V
+(I
−
) ×
OUT LIM
(R
−R
+R )
L
DS(ON)PFET
DS(ON)NFET
I
RIPPLE
2
I
=(I
LIM
−
)×(1−D)
OUTMAX
Chip Information
TRANSISTOR COUNT: 5156
Here, I
is the NFET current limit (800mA typ), t
is
LIM
OFF
PROCESS: BiCMOS
the LX switch’s off-time (0.25µs typ), and R is the
L
series resistance of the inductor.
_______________________________________________________________________________________
9
Low Input/Output Voltage
Step-Up DC-DC Converter with RESET
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
D
N
PIN 1
INDEX
AREA
E
E2
DETAIL A
C
C
L
L
L
L
A
e
e
PACKAGE OUTLINE, 6, 8, 10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
1
NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY
21-0137
F
2
COMMON DIMENSIONS
SYMBOL
MIN.
0.70
2.90
2.90
0.00
0.20
MAX.
0.80
3.10
3.10
0.05
0.40
A
D
E
A1
L
k
0.25 MIN.
0.20 REF.
A2
PACKAGE VARIATIONS
PKG. CODE
T633-1
N
6
D2
E2
e
JEDEC SPEC
b
[(N/2)-1] x e
1.50 0.10 2.30 0.10 0.95 BSC
1.50 0.10 2.30 0.10 0.65 BSC
MO229 / WEEA
MO229 / WEEC
0.40 0.05
0.30 0.05
1.90 REF
1.95 REF
2.00 REF
2.40 REF
2.40 REF
T833-1
8
T1033-1
T1433-1
T1433-2
10
14
14
1.50 0.10 2.30 0.10 0.50 BSC MO229 / WEED-3 0.25 0.05
1.70 0.10 2.30 0.10 0.40 BSC
1.70 0.10 2.30 0.10 0.40 BSC
- - - -
- - - -
0.20 0.03
0.20 0.03
PACKAGE OUTLINE, 6, 8, 10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
2
21-0137
F
2
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.
10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2004 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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