MAX1795EUA ,Low Supply Current, Step-Up DC-DC Converters with True-ShutdownELECTRICAL CHARACTERISTICS (continued)(V = +2V, OUT = FB (V = +3.3V), SHDN = LBI = GND, T = 0°C to ..
MAX1795EUA ,Low Supply Current, Step-Up DC-DC Converters with True-ShutdownMAX1795/MAX1796/MAX179719-1798; Rev 0; 12/00Low Supply Current, Step-Up DC-DC Converterswith True-S ..
MAX1795EUA+ ,Low-Supply Current, Step-Up DC-DC Converters with True ShutdownApplications● Portable Digital Audio Players● PDAs/Palmtops● Wireless Handsets● Portable TerminalsP ..
MAX1795EUA+T ,Low-Supply Current, Step-Up DC-DC Converters with True ShutdownElectrical Characteristics(V = +2V, OUT = FB (V = +3.3V), SHDN = LBI = GND, T = 0°C to +85°C, unles ..
MAX1796EUA ,Low Supply Current, Step-Up DC-DC Converters with True-ShutdownELECTRICAL CHARACTERISTICS(V = +2V, OUT = FB (V = +3.3V), SHDN = LBI = GND, T = 0°C to +85°C, unles ..
MAX1796EUA+ ,Low-Supply Current, Step-Up DC-DC Converters with True ShutdownApplications● Portable Digital Audio Players● PDAs/Palmtops● Wireless Handsets● Portable TerminalsP ..
MAX4641EUA ,High-Speed / Low-Voltage / 4 / Dual SPST CMOS Analog SwitchesFeaturesThe MAX4641/MAX4642/MAX4643 are monolithic, dual, +1.8V to +5.5V Single-Supply Operations ..
MAX4641EUA ,High-Speed / Low-Voltage / 4 / Dual SPST CMOS Analog SwitchesApplications Low Power Consumption: < 0.01µWBattery-Operated EquipmentOrdering InformationAudio an ..
MAX4641EUA+ ,High-Speed, Low-Voltage, 4 Ohm, Dual SPST CMOS Analog SwitchesApplications♦ Low Power Consumption: < 0.01µWBattery-Operated EquipmentOrdering InformationAudio an ..
MAX4641EUA+T ,High-Speed, Low-Voltage, 4 Ohm, Dual SPST CMOS Analog SwitchesFeaturesThe MAX4641/MAX4642/MAX4643 are monolithic, dual, ♦ +1.8V to +5.5V Single-Supply Operations ..
MAX4641EUA-T ,High-Speed, Low-Voltage, 4 Ohm, Dual SPST CMOS Analog SwitchesELECTRICAL CHARACTERISTICS—Single +5V Supply(V+ = +4.5V to +5.5V, V = 2.4V, V = 0.8V, T = T to T , ..
MAX4642EUA ,High-Speed, Low-Voltage, 4з, Dual SPST CMOS Analog SwitchesELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)(V+ = +4.5V to +5.5V, V = 2.4V, V = 0.8V, T ..
MAX1795EUA-MAX1796EUA-MAX1797EUA
Low Supply Current, Step-Up DC-DC Converters with True-Shutdown
General DescriptionThe MAX1795/MAX1796/MAX1797 are high efficiency
step-up DC-DC converters intended for small portable
hand-held devices. These devices feature Maxim’s
True-Shutdown™ circuitry, which fully disconnects the
output from the input in shutdown, improves efficiency,
and eliminates costly external components. All three
devices also feature Maxim’s proprietary LX-damping
circuitry for reduced EMI in noise-sensitive applica-
tions. For additional in-system flexibility, a battery moni-
toring comparator (LBI/LBO) remains active even when
the DC-DC converter is in shutdown.
The input voltage range is +0.7V to VOUT, where VOUT
can be set from +2V to +5.5V. Startup is guaranteed
from +0.85V. The MAX1795/MAX1796/MAX1797 have a
preset, pin-selectable 5V or 3.3V output. The output
can also be adjusted to other voltages, using two exter-
nal resistors. The three devices differ only in their cur-
rent limits, allowing optimization of external components
for different loads: The MAX1795, MAX1796, and
MAX1797 have current limits of 0.25A, 0.5A, and 1A,
respectively. All devices are packaged in a compact 8-
pin µMAX package that is only 1.09mm tall and half the
size of an 8-pin SO.
________________________ApplicationsPortable Digital Audio Players
PDAs/Palmtops
Wireless Handsets
Portable Terminals
Features>95% EfficiencyTrue-Shutdown Circuitry
Output Disconnects from Input in Shutdown
No External Schottky Diode Needed25µA Quiescent Supply CurrentLow-Noise Antiringing FeatureLBI/LBO Comparator Enabled in Shutdown2µA Shutdown Current8-Pin µMAX Package
MAX1795/MAX1796/MAX1797
Low Supply Current, Step-Up DC-DC Converters
with True-Shutdown
Pin Configuration
Typical Operating Circuit19-1798; Rev 0; 12/00
Ordering InformationTrue-Shutdown is a trademark of Maxim Integrated Products.
MAX1795/MAX1796/MAX1797
Low Supply Current, Step-Up DC-DC Converters
with True-Shutdown
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VBATT= +2V, OUT = FB (VOUT= +3.3V), SHDN = LBI = GND, TA
= 0°C to +85°C, unless otherwise noted. Typical values are at= +25°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.
OUT, LX, SHDN, LBI, LBO, BATT to GND................-0.3V to +6V.............................................................-0.3V to (VOUT + 0.3V)
ILX, IOUT..............................................................................±1.5A
Output Short-Circuit Duration...................................................5s
Continuous Power Dissipation
8-Pin µMAX (derate 4.1mW/°C above +70°C).............330mW
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
MAX1795/MAX1796/MAX1797
Low Supply Current, Step-Up DC-DC Converters
with True-Shutdown
ELECTRICAL CHARACTERISTICS (continued)(VBATT= +2V, OUT = FB (VOUT= +3.3V), SHDN = LBI = GND, TA
= 0°C to +85°C, unless otherwise noted. Typical values are= +25°C.)
ELECTRICAL CHARACTERISTICS
MAX1795/MAX1796/MAX1797
Low Supply Current, Step-Up DC-DC Converters
with True-Shutdown
ELECTRICAL CHARACTERISTICS (continued)
Note 1:Operating Voltage: Since the regulator is bootstrapped to the output, once started it will operate down to a 0.7V input.
Note 2:Device is bootstrapped (power to IC comes from OUT). This correlates directly with the actual battery supply current.
Note 3:Specifications to -40°C are guaranteed by design, not production tested.
MAX1795/MAX1796/MAX1797
Low Supply Current, Step-Up DC-DC Converters
with True-ShutdownMAX1795
EFFICIENCY vs. LOAD CURRENT (+5V)
MAX1795/96/97 toc01
LOAD CURRENT (mA)
EFFICIENCY (%)40100
MAX1795
EFFICIENCY vs. LOAD CURRENT (+3.3V)
MAX1795/96/97 toc02
LOAD CURRENT (mA)
EFFICIENCY (%)40100
MAX1796
EFFICIENCY vs. LOAD CURRENT (+5V)
MAX1795/96/97 toc03
LOAD CURRENT (mA)
EFFICIENCY (%)40
MAX1796
EFFICIENCY vs. LOAD CURRENT (+3.3V)
MAX1795/96/97 toc04
LOAD CURRENT (mA)
EFFICIENCY (%)40100
MAX1797
EFFICIENCY vs. LOAD CURRENT (+5V)
MAX1795/96/97 toc05
LOAD CURRENT (mA)
EFFICIENCY (%)40
MAX1797
EFFICIENCY vs. LOAD CURRENT (+3.3V)
MAX1795/96/97 toc06
LOAD CURRENT (mA)
EFFICIENCY (%)40
NO-LOAD BATTERY CURRENT
vs. INPUT BATT VOLTAGE
BATT VOLTAGE (V)
BATTERY CURRENT (
MAX1795/96/97 toc07
STARTUP VOLTAGE
vs. LOAD CURRENT
MAX1795/96/97 toc08
LOAD CURRENT (mA)
EFFICIENCY (%)
SHUTDOWN THRESHOLD
vs. INPUT BATT VOLTAGE
BATT VOLTAGE (V)
SHUTDOWN THRESHOLD (V)
MAX1795/96/97 toc09
Typical Operating Characteristics(L = 22µH, CIN= 47µF, COUT= 47µF, TA = +25°C, unless otherwise noted.)
MAX1795/MAX1796/MAX1797
Low Supply Current, Step-Up DC-DC Converters
with True-Shutdown
Typical Operating Characteristics (continued)(L = 22µH, CIN= 47µF, COUT= 47µF, TA = +25°C, unless otherwise noted.)
MAX1795/MAX1796/MAX1797
Low Supply Current, Step-Up DC-DC Converters
with True-Shutdown
Typical Operating Characteristics (continued)(L = 22µH, CIN= 47µF, COUT= 47µF, TA = +25°C, unless otherwise noted.)
