MAX1542 Datasheet, PDF (4/20 Pages) Maxim Integrated Products – TFT LCD DC-to-DC Converter with Operational Amplifiers

TFT LCD DC-to-DC Converter with
Operational Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(V_IN = 3V, V_SUP = 8V, V_SRC = 28V, FREQ = IN (MAX1543), PGND = AGND = 0, T_A = 0°C to +85°C, typical values at T_A = +25°C,
unless otherwise noted.)
PARAMETER
DEL Turn-On Threshold
DEL Discharge Switch On-
Resistance
CTL Input Low Voltage
CTL Input High Voltage
CTL Input Leakage Current
CTL-to-SRC Propagation Delay
SRC Input Voltage Range
SRC Input Current
DRN Input Current
SRC to COM Switch On-
Resistance
DRN to COM Switch On-
Resistance (MAX1543)
SYMBOL
V_TH(DEL)
CONDITIONS
During UVLO, V_IN = 2.2V
V_IN = 2.6V to 5.5V
V_IN = 2.6V to 5.5V
CTL = AGND or IN
I_SRC
V_DRN = 8V, CTL = IN, ^MAX1542
V_DEL = 1.5V
MAX1543
V_DRN = 8V, CTL = AGND, V_DEL = 1.5V
I_DRC
V_DRN = 8V, CTL = AGND, V_DEL = 1.5V,
MAX1543
R_SRC(ON)
V_DEL = 1.5V,
CTL = IN
MAX1542
MAX1543
R_DRN(ON) V_DEL = 1.5V, CTL = AGND
MIN TYP MAX UNITS
1.178 1.240 1.302
V
20
Ω
0.6
V
2
V
-1
+1
µA
100
ns
28
V
70
130
100 180
µA
15
30
90
150
µA
5
10
Ω
15
30
30
60
Ω
COM to PGND Switch On-
Resistance (MAX1543)
R_COM(ON) V_DEL = 1.1V
350 1000 1800
Ω
ELECTRICAL CHARACTERISTICS
(V_IN = 3V, V_SUP = 8V, V_SRC = 28V, FREQ = IN (MAX1543), PGND = AGND = 0, T_A = -40°C to +85°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
IN Supply Range
IN Undervoltage Lockout
Threshold
IN Quiescent Current
MAIN STEP-UP REGULATOR
Output Voltage Range
V_IN
V_UVLO
I_IN
V_IN rising
V_IN falling
V_FB = 1.3V, LX not switching
V_FB = 1.1V, LX switching
V_MAIN
MAX1542
2.6
2.3
2.2
V_IN
1000
5.5
V
2.7
V
2.5
0.65
mA
6.5
13
V
1400
Operating Frequency
f_OSC
MAX1543
FREQ = AGND
FREQ = IN
512
1000
768
kHz
1400
FB Regulation Voltage
FB Fault Trip Level
FB Line Regulation
FB Transconductance
LX On-Resistance
V_FB
R_LX(ON)
No load
V_FB falling
V_IN = 2.6V to 5.5V
∆I_COMP = 5µA
1.215
0.96
75
1.260
V
1.04
V
0.15
%/V
300
µS
400
mΩ
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