MAX8521ETP Maxim Integrated Products, MAX8521ETP Datasheet - Page 8

• Manufacturer Part Number: MAX8521ETP
• Description: Other Power Management TEC Power Driver for Optical Modules
• Manufacturer: Maxim Integrated Products

Specifications of MAX8521ETP

• Output Voltage Range: - 4.3 V to + 4.3 V
• Output Current: 1.5 A
• Input Voltage Range: 3 V to 5.5 V
• Input Current: 14 mA
• Power Dissipation: 1.67 W
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TQFN-20
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Smallest TEC Power Drivers for Optical
Modules
8
(V
DD
TQFN
_______________________________________________________________________________________
T
T
TEC
A
= 5V, circuit of Figure 1, T
1
2
3
4
5
6
7
8
9
= +45°C
= +25°C
THERMAL STABILITY,
PIN
COOLING MODE
UCSP/WLP
D1, D2, D3
4s/div
E1, E2
C1
C2
B1
A1
A2
A3
A4
MAX8520/21 toc20
PGND1
MAXIN
MAXIP
NAME
COMP
A
SHDN
MAXV
ITEC
REF
LX1
= +25°C unless otherwise noted.)
TEMPERATURE
0.001°C/div
Inductor Connection. LX1 is high-impedance in shutdown.
Power Ground 1. Internal synchronous-rectifier ground connection. Connect all PGND
pins together at power ground plane.
Shutdown Control Input. Pull SHDN low to turn off PWM control and ITEC output.
Current-Control Loop Compensation. See the Compensation Capacitor section.
TEC Current-Monitor Output. The ITEC output voltage is a function of the voltage across
the TEC current-sense resistor. V
< 150pF.
Maximum Negative TEC Current. Connect MAXIN to REF to set default negative current
limit to - 150mV/R
network from REF to GND. The current limit will then be equal to -(V
(150mV/R
Maximum Positive TEC Current. Connect MAXIP to REF to set default positive current limit
to 150mV/R
from REF to GND. The current limit will then be equal to (V
Maximum Bipolar TEC Voltage. Connect MAXV to REF to set default maximum TEC
voltage to V
GND. The maximum TEC voltage is equal to 4 x V
1.50V Reference Output. Bypass REF to GND with a 0.1µF ceramic capacitor.
Typical Operating Characteristics (continued)
T
T
SENSE
TEC
A
= +25°C
SENSE
DD
= +25°C
ROOM TEMPERATURE
THERMAL STABILITY,
. To lower this limit, connect MAXV to a resistor-divider network from REF to
).
SENSE
. To lower this current limit, connect MAXIP to a resistor-divider network
4s/div
. To lower this current limit, connect MAXIN to a resistor-divider
MAX8520/21 toc21
ITEC
= V
FUNCTION
TEMPERATURE
0.001°C/div
REF
+ 8 (V
MAXV
OS
- V
T
T
or V
TEC
A
= +5°C
CS
= +25°C
MAXIP
DD
THERMAL STABILITY,
). Keep capacitance on ITEC
, whichever is lower.
HEATING MODE
Pin Description
/V
REF
4s/div
MAXIN
) x (150mV/R
/V
REF
MAX8520/21 toc22
) x
SENSE
TEMPERATURE
0.001°C/div
).