MAX8728ETJ+ Maxim Integrated Products, MAX8728ETJ+ Datasheet - Page 6

• Manufacturer Part Number: MAX8728ETJ+
• Description: Display Drivers Low-Cost Multiple-Ou tput Power Supply fo
• Manufacturer: Maxim Integrated Products

Specifications of MAX8728ETJ+

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low-Cost, Multiple-Output
Power Supply for LCD Monitors/TVs
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
-40°C to +85°C.) (Note 2)
6
GENERAL
IN, INL Input Voltage Range
IN Standby Supply Current
Switching Frequency
VL REGULATOR
VL Output Voltage
VL Undervoltage Lockout
Threshold
REFERENCE
REF Output Voltage
REF Load Regulation
STEP-DOWN REGULATOR
OUT1 Voltage in Fixed Mode
FB1 Regulation Voltage in
Adjustable Mode
FB1 Adjustable-Mode
Threshold Voltage
Output Voltage Adjust Range
Step-Down Regulator Fault Trip
Level
LX1-to-IN Switch
On-Resistance
LX1-to-GND1 Switch
On-Resistance
Positive Current Limit
Skip Mode I
Maximum Duty Cycle
STEP-UP REGULATOR
Output Voltage Range
Maximum Duty Cycle
FB2 Regulation Voltage
LX2 Current Limit
LX2 On-Resistance
_______________________________________________________________________________________
PARAMETER
MAX
Threshold
IN
= V
INL
= V
For VL regulator operation
V
FSEL = GND
FSEL = V
FSEL = REF
7V < V
V
VL rising, 2.5% hysteresis
No external load
0 < I
V
I
20% to 35% duty cycle, EN = V
I
Adjustable mode, FB1 falling
EN = GND
FB2 = COMP, C
V
LOAD
OUT1
SUPP
IN
FBN
IN
FB2
= 7V to 13.2V, EN = SHDN = GND
= 6.0V to 13.2V, EN = V
RFI
= 1.8V, duty cycle is 25%
= 0.5V, I
= 0.5A (Note 1)
= 12V, V
= 0.5A (Note 1)
INL
< 50µA
CC
< 13.2V, V
VL
OUT1
COMP
= 25mA
CONDITIONS
FB1
= +3.3V, V
= 1nF
= V
CC
FB2
,
CC
= V
SRC
,
FBP
= 28V, GND1 = GND2 = GNDP = GND = 0, I
= 1.9V,
1.536
1175
1.97
3.23
1.97
0.10
0.45
1.97
MIN
780
400
V
7.0
4.8
3.8
2.0
2.3
1.2
70
65
8
IN
TYP
1.664
MAX
1800
1150
13.2
2.02
3.35
2.03
0.20
0.75
2.02
610
550
0.5
5.1
4.1
3.6
3.1
1.8
10
40
85
17
85
1
REF
= 0, T
UNITS
kHz
mA
mV
mΩ
%
%
Ω
Ω
V
V
V
V
V
V
V
V
V
A
A
V
V
A
A
=