Datasheet

(Circuit of Figure 1; including R5, R6, and D2; T
A
= +25°C, unless otherwise noted.)
PIN
NAME FUNCTION
MAX1530 MAX1531
1 1 DRV2
Gamma Linear Regulator (LR2) Base Drive. Open drain of an internal N-channel
MOSFET. Connect DRV2 to the base of an external PNP pass transistor to form a
positive linear regulator. (See the Pass Transistor Selection section.)
2 2 FBL2
Gamma Linear Regulator (LR2) Feedback Input. FBL2 regulates at 1.245V nominal.
Connect FBL2 to the center tap of a resistive voltage-divider between the LR2 output
and AGND to set the output voltage. Place the divider close to the FBL2 pin.
3 3 FBL3
Gate-On Linear Regulator (LR3) Feedback Input. FBL3 regulates at 1.245V nominal.
Connect FBL3 to the center tap of a resistive voltage-divider between the LR3 output
and AGND to set the output voltage. Place the divider close to the FBL3 pin.
4 4 DRV3
Gate-On Linear Regulator (LR3) Base Drive. Open drain of an internal N-channel
MOSFET. Connect DRV3 to the base of an external PNP pass transistor to form a
positive linear regulator. (See the Pass Transistor Selection section.)
5–10,
18, 19
— N. C. No Connection. Not internally connected.
11
11
RSTIN
Adjustable Reset Input. RESET asserts low when the monitored voltage is less
than the reset trip threshold. RESET goes to a high-impedance state only after the
monitored voltage remains above the reset trip threshold for the duration of the reset
timeout period. Connect RSTIN to the center tap of a resistive voltage-divider between
the monitored output voltage and AGND to set the reset trip threshold. The internal
RSTIN threshold of 90% of 1.238V allows direct connection of RSTIN to any of the
device’s positive feedback pins.
LR5 NORMALIZED LOAD REGULATION
MAX1530 toc25
LOAD CURRENT (mA)
VOLTAGE ERROR (%)
40302010
-0.8
-0.6
-0.4
-0.2
0
-1.0
0 50
LR5 NORMALIZED LINE REGULATION
MAX1530 toc26
INPUT VOLTAGE (V)
OUTPUT-VOLTAGE ERROR (%)
-13-17-21
0
0.2
0.4
0.6
0.8
1.0
-0.2
-25 -9
20mA LOAD CURRENT
MAX1530/MAX1531 Multiple-Output Power-Supply
Controllers for LCD Monitors
Maxim Integrated │ 10
www.maximintegrated.com
Typical Operating Characteristics (continued)
Pin Description