MAX5021 データシートの表示（PDF） - Maxim Integrated
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MAX5021 Datasheet PDF : 11 Pages
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Current-Mode PWM Controllers for Isolated
Power Supplies
ABSOLUTE MAXIMUM RATINGS
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
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.
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)
PARAMETER
SYMBOL
UNDERVOLTAGE LOCKOUT/STARTUP
Undervoltage Lockout Wakeup
Level
VUVR VIN rising
CONDITIONS
MIN TYP MAX UNITS
22
24
26
V
Undervoltage Lockout Shutdown
Level
VUVF VIN falling
VIN Supply Current at Startup
VIN Range
Undervoltage Lockout
Propagation Delay
INTERNAL SUPPLY
ISTART
VIN
TUVR
TUVF
VIN = +22V
VIN steps up from +9V to +26V
VIN steps down from +26V to +9V
VCC Regulator Set Point
VCCSP
VIN = +11V to +28V, sourcing 1µA to 5mA
from VCC
VIN Supply Current after Startup
GATE DRIVER
Driver Output Impedance
Driver Peak Sink Current
Driver Peak Source Current
PWM COMPARATOR
Comparator Offset Voltage
CS Input Bias Current
IIN
VIN = +28V, OPTO connected to GND
VIN = +28V, OPTO unconnected (Note 2)
RON(LOW) Measured at NDRV sinking 5mA
RON(HIGH) Measured at NDRV sourcing 5mA
ISINK
ISOURCE
VOPWM VOPTO - VCS
ICS
Propagation Delay from
Comparator Input to NDRV
TPWM 25mV overdrive
Minimum On-Time
CURRENT-LIMIT COMPARATOR
Current-Limit Trip Threshold
Current-Limit Propagation Delay
from Comparator Input to NDRV
TON(MIN)
VCS
TCL
25mV overdrive
9.3
10
10.9
V
50
85
µA
11
28
V
5
µs
1
7.0
10.5
V
0.9
2.43
mA
0.4
10
20
Ω
20
40
250
mA
150
mA
600 750 900
mV
-2
+2
µA
60
ns
150
ns
540 600 660
mV
60
ns
2 _______________________________________________________________________________________
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