Rainbow Electronics MAX1531 User Manual
Page 4
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
IN
= 12V, V
EN
= V
SEQ
= 5V, T
A
= 0
°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25
°C.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SOFT-START
Step Size
Measured at FB
1.238 / 32
V
FREQ = GND
1024 / f
OSC
Period
FREQ = VL
2048 / f
OSC
s
FET DRIVERS
DH, DL On-Resistance
3
10
Ω
DH, DL Output Drive Current
Sourcing or sinking, V
DH
or V
DL
= V
VL
/ 2
0.5
A
LX, BST Leakage Current
V
BST
= V
LX
= V
IN
= 28V
20
µA
LINEAR REGULATOR CONTROLLERS
POSITIVE LINEAR REGULATOR (LR1)
FBL1 Regulation Voltage
V
DRV1
= 5V, I
DRV1
= 100µA
1.226
1.245
1.264
V
FBL1 Input Bias Current
V
FBL1
= 1.5V
-50
+50
nA
FBL1 Effective Load Regulation
Error (Transconductance)
V
DRV1
= 5V, I
DRV1
= 100µA to 2mA
-1.5
-2
%
FBL1 Line Regulation Error
I
DRV1
= 100µA, 5.5V < V
IN
< 28V
5
mV
DRV1 Sink Current
V
FBL1
= 1.175V, V
DRV1
= 5V
3
10
mA
DRV1 Off-Leakage Current
V
FBL1
= 1.5V, V
DRV1
= 28V
0.1
10
µA
FBL1 Input Common-Mode
Range
(Note 2)
-0.1
+1.5
V
Soft-Start Step Size
Measured at FBL1
1.238 / 32
V
FREQ = GND
1024 / f
OSC
Soft-Start Period
FREQ = VL
2048 / f
OSC
s
POSITIVE LINEAR REGULATORS (LR2 AND LR3)
FBL_ Regulation Voltage
V
DRV
_ = 5V, I
DRV
_ = 100µA
1.226
1.245
1.264
V
FBL_ Input Bias Current
V
FBL
_ = 1.5V
-50
+50
nA
FBL_ Effective Load Regulation
Error (Transconductance)
V
DRV
_ = 5V, I
DRV
_ = 50µA to 1mA
-1.5
-2
%
FBL_ Line Regulation Error
I
DRV
_ = 100µA, 5.5V < V
IN
< 28V
5
mV
DRV_ Sink Current
V
FBL_
= 1.175V, V
DRV_
= 5V
2
4
mA
DRV_ Off-Leakage Current
V
FBL
_ = 1.5V, V
DRV
_ = 28V
0.1
10
µA
FBL_ Input Common-Mode
Range
(Note 2)
-0.1
+1.5
V
Soft-Start Step Size
Measured at FBL_
1.238 / 32
V