MAX1708EEE ,High-Frequency / High-Power / Low-Noise / Step-Up DC-DC ConverterApplications Ordering InformationRouters, Servers, Workstations, Card RacksPART TEMP. RANGE PIN-PAC ..
MAX1708EEE+ ,High-Frequency, High-Power, Low-Noise, Step-Up DC-DC ConverterELECTRICAL CHARACTERISTICS(V = V = 3.6V, ONA = ONB = FB = GND, T = 0°C to +85°C, unless otherwise n ..
MAX1708EEE+T ,High-Frequency, High-Power, Low-Noise, Step-Up DC-DC ConverterApplications Ordering InformationRouters, Servers, Workstations, Card RacksPART TEMP. RANGE PIN-PAC ..
MAX1709ESE ,4A / Low-Noise / High-Frequency / Step-Up DC-DC Converter
MAX1709ESE+ ,4A, Low-Noise, High-Frequency, Step-Up DC-DC ConverterApplicationsPART TEMP. RANGE PIN-PACKAGERouters, Servers, Workstations, Card RacksMAX1709ESE -40°C ..
MAX1709ESE+T ,4A, Low-Noise, High-Frequency, Step-Up DC-DC ConverterFeaturesThe MAX1709 sets a new standard of space savings for On-Chip 10A Power MOSFEThigh-power, s ..
MAX4529CSA ,Low-Voltage / Bidirectional RF/Video SwitchFeaturesThe MAX4529 is a low-voltage T-switch designed for' High 50Ω Off Isolation: -80dB at 10MHzs ..
MAX4529ESA ,Low-Voltage / Bidirectional RF/Video SwitchApplicationsMAX4529CPA 0°C to +70°C 8 Plastic DIP —RF SwitchingMAX4529CSA 0°C to +70°C 8 Narrow SO ..
MAX4529ESA+ ,Low-Voltage, Bidirectional RF Video SwitchApplicationsMAX4529CPA 0°C to +70°C 8 Plastic DIP —RF SwitchingMAX4529CSA 0°C to +70°C 8 Narrow SO ..
MAX4529ESA+T ,Low-Voltage, Bidirectional RF Video SwitchELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, V = 0.8V, V = 2. ..
MAX4529EUA ,Low-Voltage / Bidirectional RF/Video SwitchELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, V = 0.8V, V = 2. ..
MAX452CPA ,CMOS Video Multiplexer/AmplifierGeneral Description
The MAX452 is a unity-gain stable, 50MHz video amplifier
capable of driving ..
MAX1708EEE
High-Frequency / High-Power / Low-Noise / Step-Up DC-DC Converter
General DescriptionThe MAX1708 sets a new standard of space savings for
high-power, step-up DC-DC conversion. It delivers up
to 10W at a fixed (3.3V or 5V) or adjustable (2.5V to
5.5V) output, using an on-chip power MOSFET from a
+0.7V to +5V supply.
Fixed-frequency PWM operation ensures that the
switching noise spectrum is constrained to the 600kHz
fundamental and its harmonics, allowing easy postfilter-
ing for noise reduction. External clock synchronization
capability allows for even tighter noise spectrum con-
trol. Quiescent power consumption is less than 1mW to
extend operating time in battery-powered systems.
Two control inputs (ONA, ONB) allow simple push-on,
push-off control through a single momentary push-but-
ton switch, as well as conventional on/off logic control.
The MAX1708 also features programmable soft-start
and current limit for design flexibility and optimum per-
formance with batteries. The maximum RMS switch cur-
rent rating is 5A. For a device with a higher (10A)
switch current rating, refer to the MAX1709 data sheet.
________________________ApplicationsRouters, Servers, Workstations, Card Racks
Local 2.5V to 3.3V or 5V Conversion
Local 3.3V to 5V Conversion
3.6V or 5V RF PAs in Communications Handsets
FeaturesOn-Chip 5A Power MOSFET5V, 2A Output from a 3.3V InputFixed 3.3V or 5V Output Voltage or
Adjustable (2.5V to 5.5V)Input Voltage Range Down to 0.7VLow Power Consumption
1mW Quiescent Power
1µA Current in Shutdown ModeLow-Noise, Constant Frequency Operation
(600kHz)Synchronizable Switching Frequency
(350kHz to 1000kHz)Small QSOP Package
MAX1708
High-Frequency, High-Power, Low-Noise,
Step-Up DC-DC Converter
Pin Configurationypical Operating Circuit19-2068; Rev 0; 7/01
Ordering Information
MAX1708
High-Frequency, High-Power, Low-Noise,
Step-Up DC-DC Converter
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICSStresses 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.
ONA, ONB, OUT, SS/LIM, 3.3/5 to GND...............-0.3V to +6.0V
LX to PGND...........................................................-0.3V to +6.0V
FB, CLK, REF to GND..............................-0.3V to (VOUT+ 0.3V)
PGND to GND.......................................................-0.3V to +0.3V
Continuous Power Dissipation (TA= +70°C)
16-Pin QSOP (derate 8.30mW/°C above +70°C). .......667mW
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
MAX1708
High-Frequency, High-Power, Low-Noise,
Step-Up DC-DC Converter
ELECTRICAL CHARACTERISTICS (continued)
ELECTRICAL CHARACTERISTICS
rent.
Note 2:Load regulation is measured by forcing specified switch current and straight-line calculation of change in output voltage in
external feedback mode. Note that the equivalent load current is approximately ISW✕(VIN/ VOUT).
Note 3:Until undervoltage lockout is reached, the device remains in startup mode. Do not apply full load until this voltage is
reached.
Note 4:Startup is tested with Figure 1’s circuit. Output current is measured when both the input and output voltages are applied.
Note 5:Minimum operating voltage. The MAX1708 is bootstrapped and will operate down to a 0.7V input once started.
Note 6:Supply current is measured from the output voltage (+3.3V) to the OUT pin. This correlates directly with actual input supply
current but is reduced in value according to the step-up ratio and efficiency.
Note 7:ONA and ONBinputs have approximately 0.15V hysteresis.
Note 8:Guaranteed by design, not production tested.
Note 9:Specifications to -40°C are guaranteed by design, not production tested.
MAX1708
High-Frequency, High-Power, Low-Noise,
Step-Up DC-DC Converter
ELECTRICAL CHARACTERISTICS (continued)
MAX1708
High-Frequency, High-Power, Low-Noise,
Step-Up DC-DC Converter
Typical Operating Characteristics(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
MAX1708
High-Frequency, High-Power, Low-Noise,
Step-Up DC-DC Converter100010,000
STARTUP VOLTAGE vs. LOAD CURRENT
(VOUT = 5V)
MAX1708 toc06a
LOAD CURRENT (mA)
STARTUP VOLTAGE (V)
0.510010001010,000
STARTUP VOLTAGE vs. LOAD CURRENT
(VOUT = 3.3V)MAX1708 toc06b
LOAD CURRENT (mA)
STARTUP VOLTAGE (V)
SWITCHING FREQUENCY
vs. TEMPERATURE
MAX1708 toc07
TEMPERATURE (°C)
FREQUENCY CHANGE (%)
NOISE vs. FREQUENCY
MAX1708 toc08
FREQUENCY (MHz)
NOISE (
SWITCH CURRENT LIMIT
vs. SS/LIM RESISTANCE
MAX1708 toc09
SS/LIM RESISTANCE (kΩ)
SWITCH CURRENT LIMIT (A)1
SWITCH CURRENT LIMIT
vs. TEMPERATURE
MAX1708 toc10
TEMPERATURE (°C)
SWITCH CURRENT LIMIT (A)
1µs/div
HEAVY SWITCHING WAVEFORMVOUT
AC-COUPLED
50mV/div
VLX
5V/div
2A/div
MAX1708 toc11
Typical Operating Characteristics (continued)(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
MAX1708
High-Frequency, High-Power, Low-Noise,
Step-Up DC-DC Converter
Typical Operating Characteristics (continued)(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
