max5974 Maxim Integrated Products, Inc., max5974 Datasheet - Page 2

• Manufacturer Part Number: max5974
• Description: Active-clamped, Spread-spectrum, Current-mode Pwm Controllers
• Manufacturer: Maxim Integrated Products, Inc.

Active-Clamped, Spread-Spectrum,
Current-Mode PWM Controllers
ABSOLUTE_MAXIMUM_RATINGS
IN to GND ..............................................................-0.3V to +24V
EN, NDRV, AUXDRV to GND .....................-0.3V to (V
RT, DT, FFB, COMP, SS, DCLMP, DITHER/SYNC
FB to GND (MAX5974A/MAX5974B only) ..................-6V to +6V
FB to GND (MAX5974C/MAX5974D only) ..............-0.3V to +6V
CS, CSSC to GND ...................................................-0.8V to +6V
PGND to GND ......................................................-0.3V to +0.3V
Maximum Input/Output Current (continuous)
Note_1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
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
V
unless otherwise noted. Typical values are at T
2
GND
UNDERVOLTAGE_LOCKOUT/STARTUP_(IN)
Bootstrap UVLO Wakeup Level
Bootstrap UVLO Shutdown
Level
IN Supply Current in
Undervoltage Lockout
IN Supply Current After Startup
ENABLE_(EN)
Enable Threshold
Input Current
OSCILLATOR_(RT)
RT Bias Voltage
NDRV Switching Frequency
Range
NDRV Switching Frequency
Accuracy
Maximum Duty Cycle
to GND .................................................................-0.3V to +6V
NDRV, AUXDRV ............................................................100mA
NDRV, AUXDRV (pulsed for less than 100ns) .................. Q1A
IN
= 12V (for MAX5974A/MAX5974C, bring V
, V
EN
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
PARAMETER
= +2V, NDRV = AUXDRV = SS = COMP = unconnected, R
SYMBOL
V
V
I
D
START
V
V
INUVR
INUVF
V
f
I
ENR
MAX
ENF
SW
I
EN
RT
C
A
IN
= +25NC.) (Note 2)
up to 21V for startup), V
IN
V
V
V
MAX5974C);
V
when in bootstrap UVLO
V
V
V
f
SW
IN
IN
IN
IN
IN
EN
EN
+ 0.3V)
rising
falling
= +18V (for MAX5974A/
= +9V (for MAX5974B/MAX5974D),
= +12V
= 250kHz
rising
falling
CONDITIONS
Continuous Power Dissipation (T
Junction-to-Case Thermal Resistance (B
Junction-to-Ambient Thermal Resistance (B
Operating Temperature Range .......................... -40NC to +85NC
Maximum Junction Temperature .....................................+150NC
Storage Temperature Range ............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
16-Pin TQFN (derate 20.8mW/NC above +70NC) .......1666mW
16-Pin TQFN ...................................................................7NC/W
16-Pin TQFN .................................................................48NC/W
RT
= 34.8kI, R
CS
= V
MAX5974A/
MAX5974C
MAX5974B/
MAX5974D
CSSC
DT
= V
= 25kI, C
DITHER/SYNC
19.1
6.65
1.17
1.09
MIN
100
9.4
79
-8
IN
A
= 1FF, T
= +70NC) (Note 1)
= V
1.215
TYP
19.8
1.14
1.23
100
9.8
1.8
80
7
FB
JC
) (Note 1)
= V
A
JA
= -40NC to +85NC,
) (Note 1)
10.25
MAX
20.4
7.35
1.26
1.19
FFB
150
600
+8
82
3
1
= V
DCLMP
UNITS
kHz
mA
FA
FA
%
%
V
V
V
V
=