Rainbow Electronics MAX1747 - Manual (Page 3)

MAX1747
Triple Charge-Pump TFT LCD
DC-DC Converter
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V IN = V SUPM = +3.0V, V SUPP = V SUPN = +5V, TGND = PGND = GND, I SHDN = 22µA, C OUT = 2 ✕ 4.7µF, C REF = 0.22µF, C INTG =
1500pF, V OUT = +5V, T A = 0°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX U N IT S
FBN Input Bias Current I FBN V FBN = -50mV -50 +50 nA
DRVN PCH On-Resistance 3 6 Ω
V FBN = 50mV 1 5 Ω
DRVN NCH On-Resistance
V FBN = -50mV 20 k Ω
FBN Power-Ready Trip Level Falling edge 80 125 165 mV
FBN Fault Trip Level Rising edge 140 mV
Negative Soft-Start Period
2.048/
F OSC
s
POSITIVE LOW-POWER CHARGE PUMP
SUPP Input Supply Range V SUPP 2.7 13 V
SUPP Quiescent Current I SUPP V FBP = 1.5V, no load on DRVP 0.6 0.8 mA
SUPP Shutdown Current V SHDN = 0, V SUPP = 13V 0.1 10 µA
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 6 Ω
V FBP = 1.20V 1.5 5 Ω
DRVP NCH On-Resistance
V FBP = 1.30V 20 k Ω
FBP Power-Ready Trip Level Rising edge 1.090 1.125 1.160 V
FBP Fault Trip Level Falling edge 1.100 V
Positive Soft-Start Period
2.048/
F OSC
s
REFERENCE
Reference Voltage V REF -2 µA < I
REF < 50 µA 1.231 1.25 1.269 V
Reference Undervoltage
Threshold
V REF rising 0.95 1.05 1.18 V
LOGIC SIGNALS
SHDN Input Low Voltage 0.4 V
SHDN Bias Voltage I SHDN = 22 µA 580 724 830 mV
SHDN Bias Voltage Tempco 2 mV/ °C
SHDN Input Current Range I SHDN For 200kHz to 2MHz operation 3 65 µA
RDY Output Low Voltage I SINK = 2mA 0.25 0.5 V
RDY Output High Leakage V RDY = 13V 0.01 1 µA