Rainbow Electronics MAX1747 - Manual (Page 4)

MAX1747
Triple Charge-Pump TFT LCD
DC-DC Converter
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PARAMETER SYMBOL CONDITIONS MIN MAX UNITS
Input Supply Range V IN 2.7 4.5 V
Input Undervoltage Threshold V UVLO V IN falling, 40mV hysteresis (typ) 2.2 2.6 V
Input Quiescent Supply
Current I IN +
I SUPM
V
FB
= V
FBP
= 1.5V, V
FBN
= -0.2V, V
OUT
= 5V,
no load on DRVN and DRVP; CXN and
CXP open 1.0 mA
Output Quiescent Supply
Current
I Q(OUT)
V FB = V FBP = 1.5V, V FBN = -0.2V, V OUT = 5V,
no load on DRVN and DRVP; CXN and
CXP open 4.0 mA
Input Shutdown Current V SHDN = 0, V SUPM = 5V 20 µA
Operating Frequency f OSC I SHDN = 22 µA 0.65 1.2 MHz
MAIN CHARGE PUMP
Output Voltage Range V OUT 4.5 5.5 V
Output Current I
OU T ( M AX )
C
X
= 0.47 µF 200 mA
FB Regulation Voltage V FB 1.222 1.271 V
FB Input Bias Current I FB V FB = 1.25V -50 +50 nA
FB Power-Ready Trip Level Rising edge 1.09 1.16 V
NEGATIVE LOW-POWER CHARGE PUMP
SUPN Input Supply Range V SUPN 2.7 13 V
SUPN Quiescent Current I SUPN V FBN = -0.2V, no load on DRVN 0.8 mA
SUPN Shutdown Current V SHDN = 0, V SUPN = 13V 10 µA
FBN Regulation Voltage V FBN -50 +50 mV
FBN Input Bias Current I FBN V FBN = 0 -50 +50 nA
DRVN PCH On-Resistance 6 Ω
V FBN = 50mV 5 Ω
DRVN NCH On-Resistance
V FBN = -50mV 20 k Ω
FBN Power-Ready Trip Level Falling edge 80 165 mV
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 0.8 mA
SUPP Shutdown Current V SHDN = 0, V SUPP = 13V 10 µA
FBP Regulation Voltage V FBP 1.20 1.30 V
FBP Input Bias Current I FBP V FBP = 1.5V -50 +50 nA
DRVP PCH On-Resistance 6 Ω
V FBP = 1.20V 5 Ω
DRVP NCH On-Resistance
V
FBP
= 1.30V 20 k Ω
FBP Power-Ready Trip Level Rising edge 1.09 1.16 V
ELECTRICAL CHARACTERISTICS
( 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 = -40°C to +85°C, unless otherwise noted.) (Note 1)