Current-Mode PWM Controllers with an Error
Amplifier for Isolated/Nonisolated Power Supplies
MAX5052/MAX5053
ABSOLUTE MAXIMUM RATINGS
V
IN
to GND .............................................................-0.3V to +30V
V
CC
to GND ............................................................-0.3V to +13V
FB, COMP, UVLO, CS to GND .................................-0.3V to +6V
NDRV to GND.............................................-0.3V to (V
CC
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
8-Pin µMAX (derate 4.5mW/°C above +70°C) ..............362mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range ............................-65°C to +150°C
Junction Temperature ......................................................+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
(V
IN
= +12V (for MAX5052, V
IN
must first be brought up to 23.6V for startup), 10nF bypass capacitors at V
IN
and V
CC
, C
NDRV
= 0,
V
UVLO
= +1.4V, V
FB
= +1.0V, V
COMP
= floating, V
CS
= 0V, typical values are measured at T
A
= +25°C, T
A
= -40°C to + 85°C, unless
otherwise noted.) (Note 1)
PARAMETER
Bootstrap UVLO Wake-Up Level
Bootstrap UVLO Shutdown Level
UVLO/EN Wake-Up Threshold
UVLO/EN Shutdown Threshold
UVLO/EN Input Current
UVLO/EN Hysteresis
V
IN
Supply Current In
Undervoltage Lockout
V
IN
Range
UVLO/EN Propagation Delay
Bootstrap UVLO Propagation
Delay
INTERNAL SUPPLY
V
CC
Regulator Set Point
V
IN
Supply Current After Startup
Shutdown Supply Current
GATE DRIVER
Driver Output Impedance
Driver Peak Sink Current
Driver Peak Source Current
PWM COMPARATOR
Comparator Offset Voltage
CS Input Bias Current
Comparator Propagation Delay
Minimum On-Time
VO
PWM
I
CS
t
PWM
t
ON(MIN)
V
COMP
- V
CS
V
CS
= 0V
V
CS
= +0.1V
1.15
-2
60
150
1.38
1.70
+2
V
µA
ns
ns
R
ON(LOW)
Measured at NDRV sinking, 100mA
2
4
1
0.65
4
12
R
ON(HIGH)
Measured at NDRV sourcing, 20mA
Ω
A
A
V
CCSP
I
IN
V
IN
= +10.8V to +24V, sinking 1µA to 20mA
from V
CC
V
IN
= +24V
UVLO/EN = low
7
1.4
10.5
2.5
90
V
mA
µA
I
START
V
IN
t
EXTR
t
EXTF
t
BUVR
t
BUVF
UVLO/EN steps up from +1.1V to +1.4V
UVLO/EN steps down from +1.4V to +1.1V
V
IN
steps up from +9V to +24V
V
IN
steps down from +24V to +9V
V
IN
= +19V, for MAX5052 only when in
bootstrap UVLO
10.8
12
1.8
5
1
SYMBOL
V
SUVR
V
SUVF
V
ULR2
V
ULF2
I
UVLO
CONDITIONS
V
IN
rising (MAX5052 only)
V
IN
falling (MAX5052 only)
UVLO/EN rising
UVLO/EN falling
T
J
= +125°C
MIN
19.68
9.05
1.188
1.168
TYP
21.6
9.74
1.28
1.23
25
50
45
90
24
MAX
23.60
10.43
1.371
1.291
UNITS
V
V
V
V
nA
mV
µA
V
µs
µs
UNDERVOLTAGE LOCKOUT/STARTUP
2
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
