Datasheet

MAX17598/MAX17599
Low I
Q
, Wide-Input Range, Active Clamp
Current-Mode PWM Controllers
6Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 12V (for MAX17598, bring V
IN
up to 21V for startup), V
CS
= V
DITHER
= V
FB
= V
OVI
= V
SGND
= V
PGND
= 0V, V
EN/UVLO
= +2V,
AUXDRV = NDRV = SS = COMP = SLOPE = unconnected, R
RT
= 25kI, R
DT
= 10kI, C
VIN
= 1FF, C
VDRV
= 1FF, T
A
= T
J
= -40NC to
+125NC, unless otherwise noted. Typical values are at T
A
= T
J
= +25NC.) (Note 2)
Note 2: All devices are 100% production tested at +25NC. Limits over temperature are guaranteed by design.
Note 3: The MAX17598 is intended for use in universal input power supplies. The internal clamp circuit at IN is used to prevent the
bootstrap capacitor from charging to a voltage beyond the absolute maximum rating of the device when EN is low (shut-
down mode). Externally limit the maximum current to IN (hence to clamp) to 2mA (max) when EN is low.
Typical Operating Characteristics
(V
IN
= 15V, V
EN/UVLO
= +2V, COMP = open, C
VIN
= 1FF, C
VDRV
= 1FF, T
A
= T
J
= -40NC to +125NC, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Transconductance
Bandwidth
BW Open-loop (gain = 1), -3dB frequency° 10 MHz
Source Current V
COMP
= 1.8V, V
FB
= 1V 80 120 210 FA
Sink Current V
COMP
= 1.8V, V
FB
= 1.75V 80 120 210 FA
THERMAL SHUTDOWN
Thermal Shutdown Threshold Temperature rising 160 °C
Thermal Shutdown
Hysteresis
20 °C
BOOTSTRAP UVLO WAKE-UP LEVEL
vs. TEMPERATURE (MAX17598)
MAX17598/9 toc01
TEMPERATURE (°C)
BOOTSTRAP UVLO WAKE-UP LEVEL (V)
100806040200-20
19.99
20.00
20.01
20.02
20.03
20.04
19.98
-40 120
V
IN
WAKEUP LEVEL
vs. TEMPERATURE (MAX17599)
MAX17598/9 toc02
TEMPERATURE (°C)
V
IN
WAKEUP LEVEL (V)
100806040200-20
4.09
4.08
4.10
4.11
4.12
4.13
4.07
-40 120
IN UVLO SHUTDOWN LEVEL
vs. TEMPERATURE (MAX17598)
MAX17598/9 toc03
TEMPERATURE (°C)
IN UVLO SHUTDOWN LEVEL (V)
100806040200-20
7.000
7.005
7.010
7.015
7.020
7.025
6.995
-40 120