Rainbow-electronics MAX1531 Manuel d'utilisateur télécharger pdf (Page 4)

MAX1530/MAX1531

Multiple-Output Power-Supply Controllers for

LCD Monitors

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V

= 12V, V

= V

SEQ

= 5V, T

= 0°C to +85°C, unless otherwise noted. Typical values are at T

= +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

FET DRIVERS

DH, DL On-Resistance 3 10 Ω

DH, DL Output Drive Current Sourcing or sinking, V

or V

= V

/ 2 0.5 A

LX, BST Leakage Current V

BST

= V

= 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)

DRV1

= 5V, I

DRV1

= 100µA to 2mA -1.5 -2 %

FBL1 Line Regulation Error I

DRV1

= 100µA, 5.5V < V

< 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

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)

DRV

_ = 5V, I

DRV

_ = 50µA to 1mA -1.5 -2 %

FBL_ Line Regulation Error I

DRV

_ = 100µA, 5.5V < V

< 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

1 2 3 4 5 6 7 8 9 ... 32 33

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Rainbow-electronics MAX1531 Manuel d'utilisateur Page 4

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