Rainbow Electronics MAX1885 - Manual (Page 8)

MAX1778/MAX1880–MAX1885
Quad-Output TFT LCD DC-DC
Converters with Buffer
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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
Input Bias Current I BIAS V CM = 5V -500 +500 nA
Input Offset Current I OS V CM = 5V -500 +500 nA
I BUFOUT = 0 4.988 5.012
I BUFOUT = ±5mA 4.97 5.03 Output Voltage V BUFOUT BUF+ = GND
I BUFOUT = ±45mA 4.93 5.07
V
I BUFOUT = ±5mA -30 30
Input Offset Voltage V
OS
V SUPB = 4.5V to 13V
V CM = 1.2V to
(V SUPB - 1.2V) I
BUFOUT
= ±45mA -70 70
mV
Output Voltage Swing High V OH I BUFOUT = -45mA, ∆V
OS = 1V 9 V
Output Voltage Swing Low V OL I BUFOUT = +45mA, ∆V
OS = 1V 1 V
BUF+ Dual Mode
Threshold Voltage
Falling edge, 20mV hysteresis (typ) 80 170 mV
REFERENCE
Reference Voltage V REF -2µA < I REF < 50µA 1.223 1.269 V
Reference Undervoltage
Threshold
0.9 1.2 V
LOGIC SIGNALS
SHDN Input Low Voltage 0.9 V
SHDN Input High Voltage 2.1 V
SHDN Input Current I SHDN 1 µA
FLTSET Input Voltage Range 0.74 x V REF 0.85 x V REF V
FLTSET Threshold Voltage Rising edge, 25mV hysteresis (typ) 80 170 mV
FLTSET Input Current V FLTSET = 1V 50 nA
RDY Output Low Voltage I SINK = 2mA 0.5 V
RDY Output High Leakage V RDY = 13V 1 µA
Note 1: Dropout Voltage is defined as the V SUPL - V LDOOUT , when V SUPL is 100mV below the set value of V LDOOUT .
Note 2: Specifications to -40°C are guaranteed by design, not production tested.