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MAX1643 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - Step-Up DC-DC Converters - Maxim

भाग संख्या MAX1643
समारोह Step-Up DC-DC Converters
मैन्युफैक्चरर्स Maxim 
लोगो Maxim लोगो 
पूर्व दर्शन
1 Page
		
<?=MAX1643?> डेटा पत्रक पीडीएफ

MAX1643 pdf
High-Efficiency, Step-Up
DC-DC Converters for 1V Inputs
ABSOLUTE MAXIMUM RATINGS
BATT to GND ...........................................................-0.3V to 6.0V
BATT Forward Current ..........................................................0.5A
OUT to GND.............................................................-0.3V to 6.0V
OUT, LX Current.......................................................................1A
LX to GND................................................................-0.3V to 6.0V
SHDN, FB, BATTLO, PFO to GND ...........................-0.3V to 6.0V
PFI to GND ............................................................-0.3V to VBATT
Reverse Battery Current (TA = +25°C) (Note 1) ...............220mA
Continuous Power Dissipation
µMAX (derate 4.1mW/°C above 70°C)..........................330mW
Operating Temperature Range
MAX1642EUA/MAX1643EUA ............................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +165°C
Lead Temperature (soldering, 10sec) .............................+300°C
Note 1: The reverse battery current is measured from the Typical Operating Circuit’s input terminal to GND when the battery is con-
nected backward. A reverse current of 220mA will not exceed package dissipation limits but, if left for an extended time
(more than 10 minutes), may degrade performance.
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
(VBATT = VSHDN = 1.3V, ILOAD = 0mA, FB = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Minimum Operating Input Voltage VBATT(MIN)
Maximum Operating Input Voltage
0.7
1.65
V
V
Start-Up Voltage (Note 2)
Start-Up Voltage Tempco
RL = 3k, TA = +25°C
0.88
-2
V
mV/°C
Output Voltage
VOUT
VFB < 0.1V
3.16 3.30 3.44
V
Output Voltage Range
External feedback
2.0 5.2 V
FB Set Voltage
N-Channel On-Resistance
P-Channel On-Resistance
VFB External feedback
VOUT = 3.3V
VOUT = 3.3V
1.18 1.225 1.27
1 1.5
1.5 2.2
V
P-Channel Catch-Diode Voltage
IDIODE = 100mA, P-channel switch off 0.8 V
On-Time Constant
Off-Time Tracking Ratio (Note 3)
K
RATIO
0.9V < VBATT < 1.5V (tON = K / VBATT)
0.9V < VBATT < 1.5V, VOUT = 3.3V
17 25 35 V-µs
1 1.5
Quiescent Current into OUT
Quiescent Current into BATT
IQOUT
IQBATT
VOUT = 3.5V
11 18 µA
4 6.5 µA
Shutdown Current into OUT
ISHDN,OUT VOUT = 3.5V (MAX1642)
0.1 1 µA
Shutdown Current into BATT
Efficiency
ISHDN,BATT VBATT = 1.0V (MAX1642)
η ILOAD = 20mA
2 3.5 µA
80 %
FB Input Current
PFI Trip Voltage
VFB = 1.3V
Falling PFI, hysteresis = 1%
10 nA
590 614 632 mV
PFI Input Current
PFO, BATTLO Low Output Voltage
PFO, BATTLO Leakage Current
BATTLO Trip Voltage
SHDN Input Low Voltage
SHDN Input High Voltage
SHDN Input Current
VPFI = 650mV
10 nA
VOL VPFI = 0V, VOUT = 3.3V, ISINK = 1mA
0.4 V
VPFI = 650mV, VPFO = 6V
1 µA
VOUT = 3.3V, hysteresis = 2% (MAX1643) 0.96 1.0 1.04
V
VIL % of VBATT (MAX1642)
20 %
VIH % of VBATT (MAX1642)
80
%
(MAX1642)
10 nA
2 _______________________________________________________________________________________
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