Rainbow Electronics MAX1748 - Manual (Page 3)

MAX1748
Triple-Output TFT LCD DC-DC Converter
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ELECTRICAL CHARACTERISTICS (continued)
(V IN = +3.0V, SHDN = IN, V SUPP = V SUPN = 10V, TGND = PGND = GND, C REF = 0.22µF, C INTG = 470pF, T A = 0°C to +85°C, unless
otherwise noted. Typical values are at T A = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Frequency
0.5 ×
f OSC
Hz
FBP Regulation Voltage V FBP 1.20 1.25 1.30 V
FBP Input Bias Current I FBP V FBP = 1.5V -50 50 nA
DRVP PCH On-Resistance 3 10 Ω
V FBP = 1.213V 1.5 4 Ω
DRVP NCH On-Resistance
V FBP = 1.275V 20 k Ω
FBP Power-Ready Trip Level Rising edge 1.091 1.125 1.159 V
FBP Fault Trip Level Falling edge 1.11 V
Maximum RMS DRVP Current 0.1 A
NEGATIVE CHARGE PUMP
V SUPN Input Supply Range V SUPN 2.7 13 V
Operating Frequency
0.5 ×
f OSC
Hz
FBN Regulation Voltage V FBN -50 0 50 mV
FBN Input Bias Current I FBN V FBN = -0.05V -50 50 nA
DRVN PCH On-Resistance 3 10 Ω
V FBN = 0.035V 1.5 4 Ω
DRVN NCH On-Resistance
V FBN = -0.025V 20 k Ω
FBN Power-Ready Trip Level Rising edge 80 110 165 mV
FBN Fault Trip Level Falling edge 130 mV
Maximum RMS DRVN Current 0.1 A
REFERENCE
Reference Voltage V REF -2µA < I REF < 50µA 1.231 1.25 1.269 V
Reference Undervoltage
Threshold
V REF rising 0.9 1.05 1.2 V
LOGIC SIGNALS
SHDN Input Low Voltage
0.4V hysteresis (typ) 0.9 V
SHDN Input High Voltage 2.1 V
SHDN Input Current I SHDN 0.01 1 µA
RDY Output Low Voltage I SINK = 2mA 0.25 0.5 V
RDY Output High Voltage V RDY = 13V 0.01 1 µA