MAX8537EEI(2004) View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX8537EEI
(Rev.:2004)
(Rev.:2004)
Maxim Integrated
MAX8537EEI Datasheet PDF : 23 Pages
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Dual-Synchronous Buck Controllers for Point-of-
Load, Tracking, and DDR Memory Power Supplies
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 12V, EN_ = VL, BST_ = 6V, LX_ = 1V, VL load = 0mA, CVL = 10µF (ceramic), REFIN = 1.25V, PGND = AGND = FB_ = ILIM_ =
0V, CSS = 10nF, CVTTR = 1µF, RFREQ = 20kΩ, DH_ = open, DL_ = open, POK_ = open, circuit of Figure 1, TA = 0°C to +85°C, unless
otherwise noted.)
PARAMETER
Minimum Duty Cycle
DH_ Minimum Off-Time
DH_ Minimum On-Time
ERROR AMPLIFIER
FB_ Input Bias Current
FB1 Input-Voltage Set Point
FB2 Input-Voltage Set Point
RFREQ = 100kΩ
RFREQ = 20kΩ
RFREQ = 14.3kΩ
CONDITIONS
VFB_ = 0.8V
Over line and load
MAX8538
MAX8537/MAX8539, REFIN = 0.9V
Op-Amp Open-Loop Voltage
Gain
COMP_ = 1.3V to 2.3V
Op-Amp Gain Bandwidth
Op-Amp Output-Voltage Slew
Rate
DRIVERS
Break-Before-Make Time
DH1, DH2 On-Resistance in Low
State
DH1, DH2 On-Resistance in High
State
DL1, DL2 On-Resistance in Low
State
DL1, DL2 On-Resistance in High
State
LOGIC INPUTS (EN_)
Input Low Level
Input High Level
Input Bias Current
VTTR
VTTR Output Voltage Range
VTTR Output Accuracy
REFIN
REFIN Input Bias Current
4.5V < VL < 5.5V
4.5V < VL < 5.5V
0V to 5.5V
Source or sink 15mA
-15mA ≤ IVTTR ≤ +15mA, REFIN = 0.9V or 1.25V
REFIN = 0.9V or 1.25V
MIN TYP MAX UNITS
2.4
4
12
18
%
16
25
140
200
ns
120
ns
0.792
0.792
0.894
0.800
0.800
0.900
250
0.808
0.808
0.906
72
>80
25
15
nA
V
V
dB
MHz
V/µs
30
ns
0.9
2.5
Ω
1.3
2.5
Ω
0.7
1.5
Ω
1.6
2.8
Ω
0.8
V
2.4
V
-1
+0.1
+1
µA
0.5
2.5
V
-1.0 REFIN +1.0
%
-250
+250
nA
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