MAX8553(2003) Просмотр технического описания (PDF) - Maxim Integrated
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Компоненты Описание
производитель
MAX8553
(Rev.:2003)
(Rev.:2003)
Maxim Integrated
MAX8553 Datasheet PDF : 24 Pages
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4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
ABSOLUTE MAXIMUM RATINGS
V+, EN/HSD, EN, HSD to GND...............................-0.3V to +30V
PGND to GND .......................................................-0.3V to +0.3V
VTT, REFIN, POK, OUT, FB, VL to GND...................-0.3V to +6V
REF, VTTR, DL, ILIM, FSEL to GND ............-0.3V to (VVL + 0.3V)
LX to PGND ...............................................................-2V to +30V
BST to GND ............................................................-0.3V to +36V
DH to LX ...................................................................-0.3V to +6V
LX to BST..................................................................-6V to +0.3V
REF Short Circuit to GND ...........................................Continuous
Continuous Power Dissipation (TA = +70°C)
16-Pin QSOP (derated 8.3mW/°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
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
(VV+ = VHSD = +12V, VEN/HSD = VREFIN = +2.5V, VEN = +5V, CVL = 4.7µF, CVTTR = 1µF, CREF = 0.22µF, VFSEL = 0V, ILIM = VL,
PGND = LX = GND, BST = VL, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless otherwise specified.)
PARAMETER
V+ Input Voltage Range
V+ Input Voltage Range
EN/HSD Input Voltage Range
EN Input Voltage Range
EN Input Current
HSD Input Voltage Range
HSD Input Current
REFIN Input Voltage Range
V+ Supply Current (MAX8553)
V+ Supply Current (MAX8554)
REFIN Supply Current
EN/HSD Supply Current
VL Supply Current
V+ Shutdown Supply Current
REFIN Shutdown Supply Current
VL Shutdown Supply Current
VL Undervoltage-Lockout Threshold
VTT
VTT Input Bias Current
VTT Feedback Voltage Range
VTT Feedback Voltage Accuracy
FB Input Bias Current
CONDITIONS
VL not connected to V+
VL connected to V+
MAX8553 enabled
MAX8554 enabled
MAX8554 enabled
VVTT = +1.35V
VFB = 630mV
VVL = VV+ = 5.5V, VVTT = +1.35V
EN/HSD = GND
EN/HSD = GND
VVL = VV+ = +5.5V, VEN/HSD = 0V
Rising edge, typical hysteresis = 40mV
VVTT = +1.25V
VREFIN = VEN/HSD = +1.8V
VREFIN = VEN/HSD = +3.6V
MAX8554, VFB = +600mV
MIN TYP MAX UNITS
6
28
V
4.5
5.5
V
1.5
28.0
V
1.5
28.0
V
2
3
µA
1.5
28.0
V
20
40
µA
0
3.6
V
0.8
1.2
mA
0.62 0.90
mA
125 250
µA
5
10
µA
0.8
1.2
mA
3
5
µA
1
µA
5
12
µA
4.05 4.25 4.40
V
-0.15
0
µA
0
1.8
V
49.5
50
50.5
% VREFIN
49.5
50
50.5
-0.15
0
µA
2 _______________________________________________________________________________________
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