Datasheet

MAX17491
Single-Phase Synchronous MOSFET Driver
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(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)
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.
V
DD
to GND...............…………………….………….. -0.3V to +6V
SKIP to GND..................………………………………-0.3V to +6V
PWM to GND ................……………………………….-0.3V to +6V
DL to GND..................................................-0.3V to (V
DD
+ 0.3V)
BST to GND ............................................................-0.3V to +36V
DH to LX....................................................-0.3V to (V
BST
+ 0.3V)
BST to V
DD
.............................................................-0.3V to +30V
BST to LX ................…………………………………...-0.3V to +6V
Continuous Power Dissipation
8-Pin 3mm x 3mm TQFN
(derate 23.8mW/°C above +70°C).............................1904mW
Operating Temperature Range .........................-40°C to +105°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Voltage Range V
DD
4.20 5.50 V
Rising edge, PWM disabled below this level 3.7 4.05
V
DD
Undervoltage-
Lockout Threshold
V
UVLO(VDD)
Falling edge, PWM disabled below this level 3.30 3.40 3.75
V
PWM = open; after the shutdown hold time has expired 0.08 0.20
SKIP = GND, PWM = GND, LX = GND (after zero
crossing); this state should be equivalent to low-
power standby if LX = GND
0.15 0.30
Quiescent Supply
Current (V
DD
)
I
DD
SKIP = GND or V
DD
, PWM = V
DD
, V
BST
= 5V 0.35 0.70
mA
DRIVERS
t
ON(MIN)
Minimum on-time 50
PWM Pulse Width
t
OFF(MIN)
Minimum off-time; required to allow the zero-crossing
comparator time to settle to the proper state
300
ns
DL Propagation Delay t
PWM-DL
PWM high-to-DL low 15 ns
DH Propagation Delay t
PWM-DH
PWM low-to-DH low 17 ns
T
A
= 0°C to +85°C 10
DL-to-DH Dead Time t
DL-DH
DL falling to DH rising
T
A
= -40°C to +105°C 10
ns
T
A
= 0°C to +85°C 10
DH-to-DL Dead Time t
DH-DL
DH falling to DL rising
T
A
= -40°C to +105°C 10
ns
t
F_DL
Falling, 3.0nF load 10
DL Transition Time
t
R_DL
Rising, 3.0nF load 12
ns
t
F_DH
Falling, 3.0nF load 8
DH Transition Time
t
R_DH
Rising, 3.0nF load 10
ns
DH, high state (pullup) 0.9 2.5
DH Driver
On-Resistance
R
ON(DH)
BST - LX forced to 5V
DH, low state (pulldown) 0.7 2.1

DL, high state (pullup) 0.7 1.6
DL Driver
On-Resistance
R
ON(DL)
DL, low state (pulldown) 0.3 0.9

DH Driver Source Current I
DH_SOURCE
DH forced to 2.5V, BST - LX forced to 5V 2.2 A
DH Driver Sink Current I
DH_SINK
DH forced to 2.5V, BST - LX forced to 5V 2.7 A
DL Driver Source Current I
DL_SOURCE
DL forced to 2.5V 2.7 A