MAX5068 Maxim Integrated Products, MAX5068 Datasheet - Page 5

• Manufacturer Part Number: MAX5068
• Description: Current-Mode PWM Controller
• Manufacturer: Maxim Integrated Products

(V
C
VCC
IN
21.6
21.5
21.4
21.3
21.2
21.1
21.0
10.0
1.20
1.19
1.18
1.17
1.16
1.15
1.14
1.13
1.12
1.11
1.10
High-Frequency, Current-Mode PWM Controller
9.7
9.4
9.1
8.8
8.5
8.2
7.9
7.6
7.3
7.0
= +12V for the MAX5068B/E/F; V
= 1µF; R
-40
-40
-40
V
UVLO/EN FALLING
V
MAX5068A/C/D
BOOTSTRAP UVLO WAKE-UP LEVEL
IN
IN
UVLO/EN SHUTDOWN THRESHOLD
= 10.8V, I
-15
= 19V, I
-15
-15
RT
V
CC
vs. TEMPERATURE
vs. TEMPERATURE
IN
10
= 100kΩ; NDRV = floating; V
10
10
IN
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
vs. TEMPERATURE
= 25mA
= 10mA
_______________________________________________________________________________________
35
35
35
with Accurate Programmable Oscillator
V
IN
V
IN
= 10.8V, I
60
60
60
= 19V, I
85
85
85
IN
IN
= 10mA
= 25mA
110
110
110
IN
= +23.6V for MAX5068A/C/D at startup, then reduces to +12V; C
FB
4.980
4.975
4.970
4.965
4.960
4.955
4.950
= 0; V
10.0
9.9
9.8
9.7
9.6
9.5
60
56
52
48
44
40
UNDERVOLTAGE LOCKOUT vs. TEMPERATURE
-40
-40
0
COMP
BOOTSTRAP UVLO SHUTDOWN LEVEL
V
WHEN IN BOOTSTRAP UVLO (MAX5068A/C/D)
UVLO/EN (MAX5068B/E/F) IS LOW
V
MAX5068A/C/D
R
IN
IN
RT
0.2
= 19V
FALLING
= 100kΩ
-15
-15
0.4
V
REG5 OUTPUT VOLTAGE
= floating; V
vs. OUTPUT CURRENT
IN
OUTPUT CURRENT (mA)
vs. TEMPERATURE
0.6
10
SUPPLY CURRENT IN
10
TEMPERATURE (°C)
TEMPERATURE (°C)
0.8
35
35
1.0
Typical Operating Characteristics
CS
1.2
60
60
= 0; T
1.4
85
85
1.6
A
1.8
110
110
= +25°C, unless otherwise noted.)
2.0
1.245
1.240
1.235
1.230
1.225
1.220
5.00
4.99
4.98
4.97
4.96
4.95
4.94
4.93
4.92
4.91
4.90
6
5
4
3
2
1
-40
-40
-40
V IN SUPPLY CURRENT AFTER STARTUP
UVLO/EN RISING
V
V
IN
IN
UVLO/EN WAKE-UP THRESHOLD
= 10.8V
-15
-15
= 24V
f
-15
SW
REG5 vs. TEMPERATURE
= 100kHz
vs. TEMPERATURE
vs. TEMPERATURE
10
10
10
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
f
SW
IN
f
SW
35
35
35
f
= 500kHz
SW
= 250kHz
= C
100µA LOAD
1mA LOAD
= 1.25MHz
60
60
60
REG5
f
SW
85
85
85
= 0.1µF;
= 50kHz
110
110
110
5