Smallest TEC Power Drivers for
Optical Modules
ELECTRICAL CHARACTERISTICS (continued)
(V
= PV 1 = PV 2 = SHDN = 5V, 1MHz mode (Note 3). PGND1 = PGND2 = GND, CTLI = MAXV = MAXIP = MAXIN = REF,
DD
DD DD
T
A
= 0°C to +85°C, unless otherwise noted. Typical values at T = +25°C.)
A
PARAMETER
SYMBOL
CONDITIONS
MAX8521, FREQ= V , V = 3V to 5V
MIN
0.8
0.4
0.8
0.76
0.4
0.36
0.7
0
TYP
1
MAX
1.2
UNITS
DD DD
MAX8521, FREQ= 0, V = 3V to 5V
0.5
1
0.6
DD
MAX8520, R
MAX8520, R
MAX8520, R
MAX8520, R
= 60kΩ, V = 5V
1.2
EXT
EXT
EXT
EXT
DD
Internal Oscillator Switching
Frequency
f
MHz
SW-INT
= 60kΩ, V = 3V
0.93
0.5
0.46
1.10
0.6
DD
= 150kΩ, V = 5V
DD
= 150kΩ, V = 3V
0.56
1.2
DD
External Sync Frequency Range
LX_ Duty Cycle
25% < duty cycle <75% (MAX8521 only)
(Note 5)
MHz
%
100
I
, I
CS
,
OS1 OS2
OS1, OS2, CS Input Current
SHDN, FREQ Input Current
0 or V
-100
-5
+100
+5
µA
µA
V
DD
I
I
,
0 or V , FREQ applicable for the
DD
MAX8521 only
SHDN
I
FREQ
V
= 3V to 5.5V, FREQ applicable for the
V
x
DD
DD
SHDN, FREQ Input Low Voltage
SHDN, FREQ Input High Voltage
V
IL
MAX8521 only
0.25
V
= 3V to 5.5V, FREQ applicable for the
V
x
DD
DD
V
V
IH
MAX8521 only
0.75
V
V
= V
= 5V
x 0.67, V
x 0.33, V
to V
to V
=
=
4V,
2V,
MAXV
REF
OS1
OS2
-2
-3
+2
+3
%
%
DD
MAXV Threshold Accuracy
V
V
= V
= 3V
MAXV
REF
OS1
OS2
DD
I
I
,
MAXV-BIAS
MAXV, MAXI_ Input Bias Current
V
V
= V
= 0.1V or 1.5V
-0.1
+0.1
µA
MAXV
MAXI_
MAXI_-BIAS
CTLI Gain
A
R
= 0.5V to 2.5V (Note 6)
CTLI
9.5
0.5
50
10
1
10.5
2.0
V/V
MΩ
µS
CTLI
CTLI Input Resistance
Error-Amp Transconductance
1MΩ terminated at REF
CTLI
g
100
160
+10
m
V
Accuracy
V
to V 100mV, V
=
= V /2
-10
%
ITEC
OS1
CS
OS1
DD
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
