Datasheet

MAX1513/MAX1514
TFT-LCD Power-Supply Controllers
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
IN
= 3V, V
SUPB
= 10V, SDFR = IN, C
REF
= 0.22µF, T
A
= 0°C to +85°C. Typical values are at T
A
= +25°C, unless
otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS MIN
TYP MAX
UNITS
GATE-OFF LINEAR-REGULATOR CONTROLLER (REG N)
FBN Regulation Voltage V
FBN
I
DRVN
= 0.2mA 220 250 280 mV
FBN Fault Trip Level V
FBN
rising 380 420 460 mV
FBN Input Bias Current V
FBN
= 0V
-250 +250
nA
FBN Effective Load-Regulation
Error (Transconductance)
V
DRVN
= -10V, I
DRVN
= 0.1mA to 2mA 18 25 mV
FBN Line (IN)-Regulation Error I
DRVN
= 0.2mA, 2.7V < V
IN
< 5.5V 5 mV
DRVN Source Current I
FBN
V
FBN
= 0.3V, V
DRVN
= -10V 5 mA
DRVN Off-Leakage Current V
FBN
= -0.1V, V
DRVN
= -20V 0.1 10 µA
Soft-Start Period t
SS
2.7 ms
Soft-Start Step Size V
REF
/ 128 V
BUFFER AMPLIFIER
SUPB Supply Range
V
SUPB
4.5 13.0 V
SUPB Supply Current I
SUPB
No load, V
FBPB
= 4V
0.75
1.1 mA
FBPB Input Offset Voltage V
OS
V
FBPB
= V
SUPB
/ 2 0 12 mV
FBPB Input Bias Current I
BIAS
V
FBPB
= V
SUPB
/ 2 50 nA
FBPB Input Common-Mode
Range
V
CM
0
V
SUPB
V
Common-Mode Rejection Ratio
CMRR
0 < V
FBPB
< V
SUPB
50 dB
Output-Voltage-Swing High V
OH
I
OUTB
= 5mA
V
SUPB
-
150
V
SUPB
-
80
mV
Output-Voltage-Swing Low V
OL
I
OUTB
= -5mA 80 150 mV
Short-Circuit Current ±50
±150
mA
Power-Supply Rejection Ratio PSRR DC, 6V ≤ V
SUPB
≤ 13V, V
FBPB
= 4V 60 80 dB
Slew Rate 10
V/µs
-3dB Bandwidth R
L
= 10kΩ, C
L
= 10pF 12
MHz
CONTROL INPUTS AND OUTPUTS
SDFR = IN (1.5MHz operation) 0.9 × V
IN
SDFR = unconnected (430kHz operation)
0.69 × V
IN
0.77 × V
IN
SDFR = REF (750kHz operation) 1.00 1.35
SDFR Input Level
SDFR = GND (LCD shutdown) 0.5
V
SDFR = IN
+3.0
SDFR = REF -3.0
SDFR Input Current
SDFR = GND -3.0
µA