MAX15054 Datasheet, PDF (4/9 Pages) Maxim Integrated Products – High-Side MOSFET Driver for HB LED Drivers and DC-DC Applications

High-Side MOSFET Driver for HB LED Drivers
and DC-DC Applications
Typical Operating Characteristics
(V_DD = V_BST = 5V, V_LX = V_GND = 0V, T_A = +25°C, unless otherwise noted.)
VDD UNDERVOLTAGE LOCKOUT
THRESHOLD vs. TEMPERATURE
4.250
4.225
4.200
4.175
4.150
VDD RISING
4.125
4.100
4.075
4.050
VDD FALLING
4.025
4.000
3.975
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (NC)
BST-LX UNDERVOLTAGE LOCKOUT
THRESHOLD vs. TEMPERATURE
3.875
3.850
3.825
3.800
3.775
BST-LX RISING
3.750
3.725
3.700
3.675 BST-LX FALLING
3.650
3.625
3.600
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
POWER-UP AND POWER-DOWN SEQUENCE
MAX15054 toc03
fSW = 5kHz AT HI
400µs/div
VDD
1V/div
HDRV
1V/div
0V
POWER-UP AND POWER-DOWN SEQUENCE
MAX15054 toc04
fSW = 5kHz AT HI
VDD
1V/div
HDRV
1V/div
0V
40µs/div
V_DD, BST-LX QUIESCENT SUPPLY
CURRENT vs. SUPPLY VOLTAGE
70
65
60
55
I_BST
50
45
T_A = +125NC
40
T_A = +85NC
35
30
T_A = +25NC
25
20
I_DD
15
10
5
T_A = -40NC
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
BST OPERATING SUPPLY CURRENT
vs. SWITCHING FREQUENCY
2000
NO LOAD ON HDRV
1750
1500
1250
1000
750
500
250
0
0.1 1.0 10 100 1000 10,000
SWITCHING FREQUENCY (kHz)
HI INPUT THRESHOLDS vs. TEMPERATURE
4.00
3.75
3.50
RISING
3.25
3.00
2.75
2.50 _FALLING
2.25
2.00
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (NC)
4   _______________________________________________________________________________________