MAX8520 Просмотр технического описания (PDF) - Maxim Integrated
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MAX8520 Datasheet PDF : 18 Pages
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Smallest TEC Power Drivers for Optical
Modules
ELECTRICAL CHARACTERISTICS
(VDD = VPVDD1 = VPVDD2 = VSHDN = 5V, 1MHz mode (Note2). PGND1 = PGND2 = GND, CTLI = MAXV = MAXIP = MAXIN = REF,
TA = -40°C to +85°C, unless otherwise noted.) (Note 7)
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX UNITS
Input Supply Range
Maximum TEC Current
Reference Voltage
VDD
VREF VDD = 3V to 5.5V, IREF = 150µA
3.0
±1.5
1.480
5.5
V
A
1.515
V
Reference Load Regulation
∆VREF VDD = 3V to 5V, IREF = 10µA to 1mA
5
mV
MAXIP/MAXIN Threshold
Accuracy
NFET On-Resistance
PFET On-Resistance
No Load Supply Current
Shutdown Supply Current
UVLO Threshold
Internal Oscillator Switching
Frequency
External Sync Frequency Range
LX_ Duty Cycle
OS1, OS2, CS Input Current
SHDN, FREQ Input Current
SHDN, FREQ Input Low Voltage
SHDN, FREQ Input High Voltage
RDS(ON-N)
RDS(ON-P)
IDD(NO
LOAD)
IDD-SD
VUVLO
fSW-INT
VDD = 5V
VMAXI_ = VREF
VMAXI_ = VREF/3
VDD = 3V
VMAXI_ = VREF
VMAXI_ = VREF/3
VDD = 5V, I = 0.2A
VDD = 3V, I = 0.2A
VDD = 5V, I = 0.2A
VDD = 3V, I = 0.2A
VCOMP = VREF =
1.500V, VDD = 5V
500kHz mode
1MHz mode
VCOMP = VREF =
500kHz mode
1.500V, VDD = 3.3V 1MHz mode
SHDN = GND, VDD = 5V, (Note 4)
VDD Rising
VDD Falling
MAX8521, FREQ = VDD, VDD = 3V to 5V
MAX8521, FREQ = 0, VDD = 3V to 5V
MAX8520, REXT = 60kΩ, VDD = 5V
MAX8520, REXT = 60kΩ, VDD = 3V
MAX8520, REXT = 150kΩ, VDD = 5V
MAX8520, REXT = 150kΩ, VDD = 3V
25% < duty cycle <75% (MAX8521 only)
Note 5
140
40
143
45
2.50
2.40
0.8
0.4
0.8
0.76
0.4
0.36
0.7
0
IOS1, IOS2,
ICS
0 or VDD
-100
ISHDN,
IFREQ
0 or VDD, FREQ applicable for the MAX8521
only
-5
VIL
VDD = 3V to 5.5V, FREQ applicable for the
MAX8521 only
VIH
VDD = 3V to 5.5V, FREQ applicable for the
MAX8521 only
VDD x
0.75
160
60
155
55
0.14
0.16
0.23
0.30
14
21
11
14
3
2.80
2.70
1.2
0.6
1.2
1.10
0.6
0.56
1.2
100
+100
mV
Ω
Ω
mA
mA
V
MHz
MHz
%
µA
+5
µA
VDD x
0.25
V
V
4 _______________________________________________________________________________________
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