Rainbow Electronics MAX1885 - Manual (Page 7)

MAX1778/MAX1880–MAX1885
Quad-Output TFT LCD DC-DC
Converters with Buffer
_______________________________________________________________________________________ 7
ELECTRICAL CHARACTERISTICS (continued)
(V IN = +3.0V, SHDN = IN, V SUPP = V SUPN = V SUPB = V SUPL = 10V, LDOOUT = FBL, BUF- = BUFOUT, BUF+ = FLTSET = TGND =
PGND = GND, C REF = 0.22µF, C BUF = 1µF, T A = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN MAX UNITS
POSITIVE CHARGE PUMP (MAX1778/MAX1880/MAX1881/MAX1882 ONLY)
SUPP Input Supply Range V
SUPP
2.7 13 V
FBP Regulation Voltage V FBP 1.2 1.3 V
FBP Input Bias Current I FBP V FBP = 1.5V -50 +50 nA
DRVP PCH On-Resistance R PCH(ON) 10 Ω
V FBP = 1.2V 4 Ω
DRVP NCH On-Resistance R NCH(ON)
V FBP = 1.3V 20 k Ω
FBP Power-Ready Trip Level Rising edge 1.09 1.16 V
NEGATIVE CHARGE PUMP (MAX1778/MAX1880/MAX1881/MAX1882 ONLY)
SUPN Input Supply Range V SUPN 2.7 13 V
FBN Regulation Voltage V FBN -50 +50 mV
FBN Input Bias Current I FBN V FBN = 0 -50 +50 nA
DRVN PCH On-Resistance R PCH(ON) 10 Ω
V FBN = +50mV 4 Ω
DRVN NCH On-Resistance R NCH(ON)
V FBN = -50mV 20 k Ω
FBN Power-Ready Trip Level Falling edge 80 165 mV
LOW DROPOUT LINEAR REGULATOR (MAX1778/MAX1881/MAX1883/MAX1884 ONLY)
SUPL Input Supply Range V SUPL 4.5 15 V
SUPL Undervoltage Lockout Rising edge, 50mV hysteresis (typ) 3.8 4.3 V
SUPL Quiescent Current I SUPL I LDO = 100µA 240 µA
Dropout Voltage (Note 1) V DROP LDO regulating to 9V, I LDO = 40mA 330 mV
FBL Regulation Voltage V FBL
V SUPL = 10V, LDO regulating to 9V,
I LDO = 15mA
1.222 1.265 V
LDO Load Regulation
V SUPL = 10V, LDO regulating to 9V,
I LDO = 100µA to 40mA
1.2 %
LDO Line Regulation
V SUPL = 4.5V to 15V, FBL = LDOOUT,
I LDO = 15mA
0.02 %/V
FBL Input Bias Current I FBL V FBL = 1.25V -1.2 +1.2 µA
LDO Current Limit I LDOLIM V SUPL = 10V, V LDOOUT = 9V, V FBL = 1.2V 40 260 mA
VCOM BUFFER
SUPB Input Supply Range V SUPB 4.5 13 V
SUPB Quiescent Current I SUPB V SUPB = 13V 850 µA
BUFOUT Leakage Current -10 +10 µA
Input Common-Mode Voltage V CM |V OS | < 10mV 1.2 8.8 V