MAX1779EUE+ Maxim Integrated Products, MAX1779EUE+ Datasheet - Page 6

• Manufacturer Part Number: MAX1779EUE+
• Description: IC DC-DC CONV TRPL LCD 16-TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1779EUE+

• Applications: Converter, TFT, LCD
• Voltage - Input: 2.7 ~ 5.5 V
• Number Of Outputs: 3
• Voltage - Output: 2.7 ~ 13 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Mounting Style: SMD/SMT
• Duty Cycle (max): 92 %
• Efficiency: 91 %
• Input / Supply Voltage (max): 5.5 V
• Input / Supply Voltage (min): 2.7 V
• Load Regulation: 0.1 %
• Maximum Operating Temperature: + 85 C
• Maximum Power Dissipation: 755 mW
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Output Voltage: 13 V
• Supply Current: 0.5 mA
• Switching Frequency: 250 KHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low-Power Triple-Output TFT LCD DC-DC
Converter
(Circuit of Figure 5, V
6
12.24
12.12
12.00
11.88
11.76
11.64
1.256
1.254
1.252
1.250
1.248
1.246
1.244
100
90
80
70
60
50
_______________________________________________________________________________________
POSITIVE CHARGE-PUMP OUTPUT VOLTAGE
(BOOST CONVERTER AND CHARGE PUMPS)
0
0
0
EFFICIENCY vs. LOAD CURRENT
vs. REFERENCE LOAD CURRENT
V
SINGLE-STAGE
CHARGE PUMPS
MAIN
V
5
SUPP
50
10
REFERENCE VOLTAGE
= +10V
vs. LOAD CURRENT
= +5V
10
100
20
I
I
POS
I
IN
MAIN
REF
15
= +3.3V, T
(mA)
V
V
(μA)
NEG
POS
(mA)
V
TWO-STAGE
CHARGE PUMPS
30
MAIN
150
= -8V, I
= +12V, I
20
V
SUPP
= +5V
V
SUPP
NEG
40
= +6V
200
POS
A
25
= 1mA
= +7V
= +25°C, unless otherwise noted.)
= 1mA
50
30
250
-7.76
-7.80
-7.84
-7.88
-7.92
-7.96
-8.00
-8.04
-8.08
100
12V
-8V
90
80
70
60
50
40
30
5V
Typical Operating Characteristics (continued)
NEGATIVE CHARGE-PUMP OUTPUT VOLTAGE
0
0
POSITIVE CHARGE-PUMP EFFICIENCY
A. V
B. V
C. V
5
MAIN
NEG
POS
V
RIPPLE WAVEFORMS
5
SUPP
vs. LOAD CURRENT
vs. LOAD CURRENT
= -8V, I
= 12V, I
= 5V, I
10
V
= +5V
SUPN
I
I
4.0μs/div
POS
MAIN
NEG
NEG
POS
V
SUPN
15
= +5V
10
(mA)
= 1mA, 5mV/div
(mA)
= 1mA, 5mV/div,
= 100mA, 10mV/div
= +6V
20
V
SUPN
V
V
V
15
SUPP
SUPP
POS
= +7V
25
= +12V
= +6V
MAX1779-14
FIGURE 5
= +7V
20
30
A
B
C
50mA
300
280
260
240
220
200
100
5.1V
5.0V
4.9V
90
80
70
60
50
40
30
0
2.5
0
NEGATIVE CHARGE-PUMP EFFICIENCY
A. V
B. V
FIGURE 6
3.0
(L = 10μH, 500μs PULSE)
MAIN
MAIN
SWITCHING FREQUENCY
V
SUPN
5
vs. INPUT VOLTAGE
vs. LOAD CURRENT
LOAD TRANSIENT
= 5V, 50mV/div
= 5mA to 50mA, 25mA/div
INPUT VOLTAGE (V)
= +5V
3.5
100μs/div
I
NEG
10
(mA)
4.0
V
V
15
SUPN
V
SUPN
4.5
NEG
MAX1779-15
= +6V
= -8V
= +7V
5.0
20
B
A