Datasheet

MAX17491
Single-Phase Synchronous MOSFET Driver
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
DD
= V
SKIP
= 5V, T
A
= -40°C to +105°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DL Driver Sink Current I
DL_SINK
DL forced to 2.5V 8 A
Zero-Crossing Threshold V
ZX
GND - LX, SKIP = GND 1.5 mV
Boost On-Resistance R
ON(BST)
V
DD
= 5V, DH = LX = GND (pulldown state), I
BST
= 10mA 5 8 
High (DH = high, DL = low)
V
DD
-
0.4
Midlevel
V
DD
/2 -
0.4
V
DD
/2
+ 0.4
PWM Input Levels
Low (DH = low, DL = high) 0.4
V
Sink; PWM forced to V
DD
-370 -200 -110
PWM Input Current I
PWM
Source; PWM forced to GND 110 200 370
μA
Midlevel Shutdown Hold
Time
t
MID
120 300 600 ns
Rising edge 1.7 2.4
SKIP Input Threshold
Falling edge 0.8 1.5
V
SKIP Input Current I
SKIP
Sink; SKIP forced to 0.8V to V
DD
, T
A
= +25°C -4 -2 -0.5 μA
Thermal-Shutdown
Threshold
T
SHDN
Hysteresis = 20°C +160 °C
Note 1: Limits are 100% production tested at T
A
= +25°C. Maximum and minimum limits over temperature are guaranteed through
correlation using statistical-quality-control (SQC) methods.
Typical Operating Characteristics
(Circuit of Figure 1, V
DD
= 5V, C
DH
= 3nF, C
DL
= 3nF, T
A
= +25°C, unless otherwise noted.)
PACKAGE-POWER DISSIPATION
vs. PWM FREQUENCY
PWM FREQUENCY (kHz)
PD (mW)
MAX17491 toc01
0 200 400 600 800 1000 1200
0
50
100
150
200
B
A
250
300
A: C
DH
= 3.3nF, C
DL
= 3.3nF
B: C
DH
= 1.5nF, C
DL
= 6.8nF
PACKAGE-POWER DISSIPATION
vs. CAPACITIVE LOAD ON DH AND DL
CAPACITANCE (pF)
PD (mW)
MAX17491 toc02
1000 2500 4000 5500 7000 8500 10,000
0
50
100
150
200
250
300
350
400
450
500
C
B
A
A: 300kHz
B: 600kHz
C: 1MHz
DL RISE AND FALL TIMES
vs. CAPACITIVE LOAD
CAPACITANCE (pF)
RISE AND FALL TIME (ns)
MAX17491 toc03
1000 2500 4000 5500 7000 8500 10,000
0
5
10
15
20
25
30
RISE TIME
FALL TIME
C
DL
= C
DH