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| MAX1534 Datasheet, PDF (2/16 Pages) Maxim Integrated Products – High-Efficiency, Triple-Output, Keep-Alive Power Supply for Notebook Computers | |||
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High-Efficiency, Triple-Output, Keep-Alive
Power Supply for Notebook Computers
ABSOLUTE MAXIMUM RATINGS
IN, ILIM, PRESET, SHDN to GND...........................-0.3V to +25V
FB1, FB2, FB3, LDOIN, BP to GND..........................-0.3V to +6V
OUT1, OUT2, POK to GND ...................-0.3V to (VLDOIN + 0.3V)
LX to GND.......................................................-2V to (VIN + 0.3V)
OUT1, OUT2 Short Circuit to GND.............................Continuous
Peak IN Current........................................................................2A
Maximum IN DC Current...................................................500mA
Continuous Power Dissipation (TA = +70°C)
16-Pin Thin QFN (derate 16.9mW/°C
above +70°C)............................................................1349mW
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
Stresses beyond those listed under âAbsolute Maximum Ratingsâ 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
(Circuit of Figure 1, VIN = 12V, ILIM = GND, PRESET = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA =
+25°C.)
PARAMETER
Input Voltage Range
Input Supply Current
Input Supply Current in
Dropout
Shutdown Supply Current
Input UVLO Threshold
BUCK REGULATOR
FB3 Voltage Accuracy (Preset
Mode) (Note 1)
FB3 Set Voltage (Adjustable
Mode) (Note 1)
FB3 Bias Current
LX Switch Minimum Off-Time
LX Switch Minimum On-Time
LX Switch Maximum On-Time
LX Switch On-Resistance
LX Current Limit
LX Zero-Crossing Threshold
LX Zero-Crossing Timeout
LX Switch Leakage Current
Dropout Voltage
Line Regulation
Load Regulation
LINEAR REGULATORS
LDOIN Input Voltage
LDOIN Undervoltage Lockout
SYMBOL
VIN
IIN
IIN(DROP)
VUVLO
CONDITIONS
MIN
4.5
No load, FB3 = 5.2V, LDOIN = GND
No load, FB3 = VIN = 4.5V, LDOIN = GND
SHDN = GND
VIN rising
3.6
VIN falling
3.5
VFB3
IFB3
tOFF(MIN)
tON(MIN)
tON(MAX)
RLX
ILX(PEAK)
PRESET = GND
PRESET = IN
VFB3 = 5.5V
TA = +25°C to +85°C
TA = 0°C to +85°C
TA = +25°C to +85°C
TA = 0°C to +85°C
VIN = 6V
VIN = 4.5V
ILIM = IN
ILIM = GND
LX does not rise above threshold
VIN = 24V, not
switching
TA = +25°C
TA = 0°C to +85°C
VOUT3(DROPOUT) ILX(DC) = 500mA
VIN = 8V to 24V, ILX(DC) = 200mA
ILX(DC) = 80mA to 400mA
4.92
4.90
0.985
0.98
0.22
9
800
425
-75
VLDOIN
VUVLO(LDO)
VLDOIN rising, hysteresis = 40mV typ
2.5
2.15
TYP
15
60
3.5
4.0
3.9
5.00
5.00
1.00
1.00
3.5
0.42
0.50
10
0.5
0.6
1000
500
30
250
0.1
0.9
MAX
24
30
UNITS
V
µA
110
µA
7
µA
4.4
V
4.3
5.08
V
5.10
1.015
V
1.02
6.25
µA
0.62
µs
µs
11
µs
1.0
â¦
1.2
1200
mA
575
+75
mV
µs
1
µA
10
mV
%/V
%
5.5
V
2.4
V
2 _______________________________________________________________________________________
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