MAX1779 Maxim, MAX1779 Datasheet - Page 5

• Manufacturer Part Number: MAX1779
• Description: Low-Power Triple-Output TFT LCD DC-DC Converter
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(V
unless otherwise noted.) (Note 1)
Note 1: Specifications to -40°C are guaranteed by design, not production tested.
(Circuit of Figure 5, V
LOGIC SIGNALS
SHDN Input Low Voltage
SHDN Input High Voltage
SHDN Input Current
RDY Output Low Voltage
RDY Output High Leakage
5.02
5.01
5.00
4.99
4.98
IN
100
90
80
70
60
50
MAIN OUTPUT VOLTAGE vs. LOAD CURRENT
= +3.0V, SHDN = IN, V
MAIN STEP-UP CONVERTER EFFICIENCY
0
0
PARAMETER
50
V
(L = 33µH, 5V OUTPUT)
(L = 10µH, 5V OUTPUT)
IN
50
vs. LOAD CURRENT
= +3.0V
100
V
IN
= +3.0V
I
Low-Power Triple-Output TFT LCD DC-DC
I
MAIN
MAIN
_______________________________________________________________________________________
IN
100
150
(mA)
(mA)
= +3.3V, T
200
SUPP
V
IN
150
V
IN
= +4.2V
FIGURE 6
= +4.2V
FIGURE 5
250
= V
A
SYMBOL
= +25°C, unless otherwise noted.)
SUPN
I
200
300
SHDN
= +10V, TGND = PGND = GND, C
10.04
10.02
10.00
0.25V hysteresis (typ)
I
V
SINK
9.98
9.96
100
90
50
RDY
80
70
60
MAIN OUTPUT VOLTAGE vs. LOAD CURRENT
MAIN STEP-UP CONVERTER EFFICIENCY
0
0
= 2mA
= +13V
V
IN
V
(L = 33µH, 10V OUTPUT)
= +3.3V
(L = 10µH, 5V OUTPUT)
IN
50
vs. LOAD CURRENT
= +3.0V
50
CONDITIONS
I
I
MAIN
MAIN
100
(mA)
(mA)
Typical Operating Characteristics
100
V
V
IN
IN
150
= +5.0V
= +4.2V
REF
FIGURE 6
FIGURE 5
= 0.22µF, C
200
150
5.02
5.01
5.00
4.99
4.98
100
INTG
90
80
70
60
50
MAIN OUTPUT VOLTAGE vs. LOAD CURRENT
MIN
MAIN STEP-UP CONVERTER EFFICIENCY
0
2.1
0
= 2200pF, T
50
V
IN
(L = 33µH, 10V OUTPUT)
(L = 33µH, 5V OUTPUT)
V
Converter
= +3.3V
IN
vs. LOAD CURRENT
= +3.0V
100
50
I
I
MAIN
MAIN
A
150
= -40°C to +85°C,
(mA)
(mA)
MAX
0.9
0.5
1
1
100
200
V
V
IN
IN
= +4.2V
= +5.5V
FIGURE 5
FIGURE 5
250
UNITS
µA
µA
V
V
V
150
300
5