MAX8728ETJ+T Maxim Integrated Products, MAX8728ETJ+T Datasheet - Page 3

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

Specifications of MAX8728ETJ+T

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

ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
to +85°C. Typical values are at T
STEP-DOWN REGULATOR
OUT1 Voltage in Fixed Mode
FB1 Regulation Voltage in
Adjustable Modes
FB1 Adjustable Mode Threshold
Voltage
Output Voltage Adjust Range
Step-Down Regulator Fault Trip
Level
FB1 Input Leakage Current
Low-Frequency Operation
OUT1 Threshold
Low-Frequency Operation
Switching Frequency
DC Load Regulation
DC Line Regulation
LX1-to-IN Switch
On-Resistance
LX1-to-GND1 Switch
On-Resistance
Positive Current Limit
Skip Mode I
Soft-Start Ramp Time
Maximum Duty Cycle
STEP-UP REGULATOR
Output Voltage Range
Maximum Duty Cycle
Minimum On-Time
FB2 Regulation Voltage
FB2 Fault Trip Level
FB2 Load Regulation
FB2 Line Regulation
FB2 Input Bias Current
FB2 Transconductance
FB2 Voltage Gain
LX2 Leakage Current
LX2 Current Limit
PARAMETER
MAX
Threshold
_______________________________________________________________________________________
IN
= V
INL
= V
A
Power Supply for LCD Monitors/TVs
SUPP
= +25°C, unless otherwise noted.)
V
I
20% to 35% duty cycle, EN = V
I
Fixed mode, OUT1 falling
Adjustable mode, FB1 falling
V
LX1 only
LX1 only
0 < I
7V <V
EN = GND
FB2 = COMP, C
Falling edge
0 < I
V
V
∆I = ±2.5µA at COMP, FB2 = COMP
FB2 to COMP
V
V
LOAD
LOAD
IN
FB1
IN
FB2
FB2
FB2
= 7.0V to 13.2V, EN = V
= 10.8V to 13.2V
OUT1
AVDD
= 12V, V
= 2.1V
= 2V
= 2.1V, V
= 1.8V, duty cycle is 25%
IN
= 0.5A (Note 1)
= 0.5A (Note 1)
< 13.2V, EN = V
< 2A, EN = V
< full, transient only
OUT1
LX2
CONDITIONS
COMP
= 13V
= +3.3V, V
= 1nF
CC
FSEL = GND
FSEL = V
FSEL = REF
CC
Low-Cost, Multiple-Output
CC
SRC
,
CC
CC
,
= 28V, GND1 = GND2 = GNDP = GND = 0, I
1.536
1.728
-100
-150
3.25
1.97
0.10
0.50
1.98
MIN
V
2.0
2.5
1.2
10
70
65
75
IN
2.640
1.600
1.800
TYP
3.30
2.00
0.15
0.60
2.00
0.08
250
167
200
160
700
1.3
0.5
0.1
2.8
1.7
1.5
83
22
77
75
65
-1
4
1.664
1.872
MAX
+100
+150
3.35
2.03
0.20
0.75
2.02
0.15
300
100
280
3.6
3.1
1.8
40
85
17
85
40
REF
= 0, T
UNITS
kHz
%/V
%/V
mΩ
V/V
ms
A
nA
nA
µS
µA
ns
%
%
%
%
Ω
V
V
V
V
V
V
A
A
V
V
V
A
= 0°C
3