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MAX5021 Datasheet(PDF) 2 Page - Maxim Integrated Products

Part No. MAX5021
Description  Current-Mode PWM Controllers for Isolated Power Supplies
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
Logo MAXIM - Maxim Integrated Products

MAX5021 Datasheet(HTML) 2 Page - Maxim Integrated Products

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Current-Mode PWM Controllers for Isolated
Power Supplies
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VIN = +11V to +28V, VCS = 0, OPTO is unconnected, 10nF bypass capacitors at VIN and VCC, NDRV unconnected, TA = -40°C to
+85°C, unless otherwise noted. Typical values are at VIN = +12V, TA = +25°C, unless otherwise noted.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VIN to GND .............................................................-0.3V to +30V
VCC to GND ............................................................-0.3V to +13V
NDRV to GND.............................................-0.3V to (VCC + 0.3V)
CS, OPTO to GND ....................................................-0.3V to +6V
NDRV Short-Circuit to GND........................................Continuous
Continuous Power Dissipation (TA = +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C).............696mW
8-Pin µMAX (derate 4.5mW/°C above +70°C) ..............362mW
8-Pin PDIP (derate 9.1mW/°C above +70°C)................727mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-55°C to +150°C
Lead Temperature (soldering 10s) ..................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
UNDERVOLTAGE LOCKOUT/STARTUP
Undervoltage Lockout Wakeup
Level
VUVR
VIN rising
22
24
26
V
Undervoltage Lockout Shutdown
Level
VUVF
VIN falling
9.3
10
10.9
V
VIN Supply Current at Startup
ISTART
VIN = +22V
50
85
µA
VIN Range
VIN
11
28
V
TUVR
VIN steps up from +9V to +26V
5
Undervoltage Lockout
Propagation Delay
TUVF
VIN steps down from +26V to +9V
1
µs
INTERNAL SUPPLY
VCC Regulator Set Point
VCCSP
VIN = +11V to +28V, sourcing 1µA to 5mA
from VCC
7.0
10.5
V
VIN = +28V, OPTO connected to GND
0.9
2.43
VIN Supply Current after Startup
IIN
VIN = +28V, OPTO unconnected (Note 2)
0.4
mA
GATE DRIVER
RON(LOW) Measured at NDRV sinking 5mA
10
20
Driver Output Impedance
RON(HIGH) Measured at NDRV sourcing 5mA
20
40
Driver Peak Sink Current
ISINK
250
mA
Driver Peak Source Current
ISOURCE
150
mA
PWM COMPARATOR
Comparator Offset Voltage
VOPWM
VOPTO - VCS
600
750
900
mV
CS Input Bias Current
ICS
-2
+2
µA
Propagation Delay from
Comparator Input to NDRV
TPWM
25mV overdrive
60
ns
Minimum On-Time
TON(MIN)
150
ns
CURRENT-LIMIT COMPARATOR
Current-Limit Trip Threshold
VCS
540
600
660
mV
Current-Limit Propagation Delay
from Comparator Input to NDRV
TCL
25mV overdrive
60
ns


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