Datasheet

(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
Period
FREQ = GND 1024/f
OSC
s
FREQ = VL 2048/f
OSC
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 -15 -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
FBL
1 = 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
Soft-Start Period
FREQ = GND 1024/f
OSC
s
FREQ = VL 2048/f
OSC
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
MAX1530/MAX1531 Multiple-Output Power-Supply
Controllers for LCD Monitors
www.maximintegrated.com
Maxim Integrated │ 4
Electrical Characteristics (continued)