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MAX8553 Datasheet(PDF) 5 Page - Maxim Integrated Products

Part # MAX8553
Description  4.5V to 28V Input, Synchronous PWM Buck Controllers for DDR Termination and Point-of-Load Applications
PDF  24 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX8553 Datasheet(HTML) 5 Page - Maxim Integrated Products

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4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS (continued)
(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
CONDITIONS
MIN
TYP
MAX
UNITS
POWER-OK OUTPUT
Upper VTT and VTTR Threshold
MAX8553
55
56
57
% VREFIN
Lower VTT and VTTR Threshold
MAX8553
43
44
45
% VREFIN
Upper Threshold
MAX8554
0.646
0.672
0.698
V
Lower Threshold
MAX8554
0.504
0.528
0.552
V
POK Output Low Level
ISINK = 2mA
0.4
V
POK Output High Leakage
VPOK = +5V
5
µA
ELECTRICAL CHARACTERISTICS
(VV+ = VHSD = +12V, VEN/HSD = VREFIN = +2.5V, VEN = +5V, CVL = 4.7µF, CVTTR = 1µF, CREF = 0.22µF, VFSEL = 0, ILIM = VL, PGND
= LX = POK = GND, BST = VL, TA = -40°C to +85°C, unless otherwise specified.) (Note 3)
PARAMETER
CONDITIONS
MIN
MAX
UNITS
V+ Input Voltage Range
VL not connected to V+
6
28
V
V+ Input Voltage Range
VL connected to V+
4.5
5.5
V
EN/HSD Input Voltage Range
MAX8553 enabled
1.5
28.0
V
EN Input Voltage Range
MAX8554 enabled
1.5
28.0
V
EN Input Current
3µA
HSD Input Voltage Range
MAX8554 enabled
1.5
28.0
V
HSD Input Current
40
µA
REFIN Input Voltage Range
0
3.6
V
V+ Supply Current (MAX8553)
VVTT = +1.35V
1.2
mA
V+ Supply Current (MAX8554)
VFB = 630mV
0.90
mA
REFIN Supply Current
250
µA
EN/HSD Supply Current
10
µA
VL Supply Current
VVL = VV+ = 5.5V, VVTT = +1.35V
1.2
mA
V+ Shutdown Supply Current
EN/HSD = GND
5
µA
REFIN Shutdown Supply Current
EN/HSD = GND
1
µA
VL Shutdown Supply Current
VVL = VV+ = +5.5V, VEN/HSD = 0V
12
µA
VL Undervoltage-Lockout Threshold
Rising edge, typical hysteresis = 40mV
4.05
4.40
V
VTT
VTT Input Bias Current
VVTT = +1.25V
-0.2
0
µA
VTT Feedback Voltage Range
0
1.8
V
VREFIN = VEN/HSD = +1.8V
49.5
50.5
VTT Feedback Voltage Accuracy
VREFIN = VEN/HSD = +3.6V
49.5
50.5
% VREFIN
FB Input Bias Current
MAX8554, VFB = +600mV
-0.2
0
µA
FB Regulation Voltage
MAX8554, VOUT = +2.5V, FSEL unconnected
0.598
0.616
V
Output Adjust Range
MAX8554 (Note 1)
0.6
3.5
V



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