Typical operating characteristics – Rainbow Electronics MAX15054 User Manual
Page 4
High-Side MOSFET Driver for HB LED Drivers
and DC-DC Applications
MAX15054
4 ______________________________________________________________________________________
Typical Operating Characteristics
(V
DD
= V
BST
= 5V, V
LX
= V
GND
= 0V, T
A
= +25°C, unless otherwise noted.)
BST OPERATING SUPPLY CURRENT
vs. SWITCHING FREQUENCY
MAX15054 toc06
SWITCHING FREQUENCY (kHz)
I
BSTO
(µA)
1000
100
1.0
10
250
500
750
1000
1250
1500
1750
2000
0
0.1
10,000
NO LOAD ON HDRV
HI INPUT THRESHOLDS vs. TEMPERATURE
MAX15054 toc07
TEMPERATURE (NC)
INPUT THRESHOLD (V)
110
95
-25 -10 5
35 50 65
20
80
2.25
2.50
2.75
3.00
3.25
3.50
3.75
4.00
2.00
-40
125
RISING
FALLING
POWER-UP AND POWER-DOWN SEQUENCE
MAX15054 toc04
0V
HDRV
1V/div
V
DD
1V/div
40µs/div
f
SW
= 5kHz AT HI
V
DD
, BST-LX QUIESCENT SUPPLY
CURRENT vs. SUPPLY VOLTAGE
MAX15054 toc05
SUPPLY VOLTAGE (V)
QUIESCENT CURRENT (µA)
5.0
4.5
3.5 4.0
1.0 1.5 2.0 2.5 3.0
0.5
5
10
15
20
25
30
35
40
45
50
55
60
65
70
0
5.5
T
A
= +125NC
I
BST
I
DD
T
A
= +85NC
T
A
= +25NC
T
A
= -40NC
V
DD
UNDERVOLTAGE LOCKOUT
THRESHOLD vs. TEMPERATURE
MAX15054 toc01
TEMPERATURE (NC)
UVLO THRESHOLD (V)
110
95
65 80
-10 5 20 35 50
-25
4.000
4.025
4.050
4.075
4.100
4.125
4.150
4.175
4.200
4.225
V
DD
RISING
V
DD
FALLING
4.250
3.975
-40
125
BST-LX UNDERVOLTAGE LOCKOUT
THRESHOLD vs. TEMPERATURE
MAX15054 toc02
TEMPERATURE (°C)
UVLO THRESHOLD (V)
110
95
65 80
-10 5 20 35 50
-25
3.625
3.650
3.675
3.700
3.725
3.750
3.775
3.800
3.825
3.850
3.875
3.600
-40
125
BST-LX FALLING
BST-LX RISING
POWER-UP AND POWER-DOWN SEQUENCE
MAX15054 toc03
0V
HDRV
1V/div
V
DD
1V/div
400µs/div
f
SW
= 5kHz AT HI