MAX1778EUG+ Maxim Integrated Products, MAX1778EUG+ Datasheet - Page 14

• Manufacturer Part Number: MAX1778EUG+
• Description: IC DCDC CONV MULTI OUT 24TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1778EUG+

• Applications: Converter, TFT, LCD
• Voltage - Input: 2.7 ~ 5.5 V
• Number Of Outputs: 5
• Voltage - Output: 2.7 ~ 13 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.5V
8.0V
7.8V
0.5A
Quad-Output TFT LCD DC-DC
Converters with Buffer
(Circuit of Figure 1, V
BUF+ = FLTSET = TGND = PGND = GND, T
14
1A
0
2.55
2.53
2.51
2.49
2.47
2.45
A. V
B. V
C. I
FIGURE 7
______________________________________________________________________________________
MAIN
LDO
MAIN
2.5
EXTERNAL LINEAR-REGULATOR
LINEAR-REGULATOR OUTPUT VOLTAGE
FIGURE 7
= 2.5V, I
= 0 TO 750mA, 500mA/div
= V
(EXTERNAL LINEAR REGULATOR)
3.0
RIPPLE REJECTION
SUPL
LDO
= 8V, 200mV/div
vs. INPUT VOLTAGE
= 200mA, 10mV/div
10μs/div
3.5
I
LDO
V
IN
4.0
I
LDO
= 750mA
(V)
IN
= 0
4.5
= +3.3V, SHDN = IN, V
MAX1778 toc36
5.0
A
B
C
5.5
A
= +25°C.)
-0.5
-1.5
-2.5
2.55
2.53
2.51
2.49
2.47
2.45
Typical Operating Characteristics (continued)
2.5
1.5
0.5
0.1
0
LINEAR-REGULATOR OUTPUT VOLTAGE
INPUT OFFSET VOLTAGE DEVIATION
V
(EXTERNAL LINEAR REGULATOR)
SUPB
vs. COMMON-MODE VOLTAGE
MAIN
2
= 4.5V
1
vs. LOAD CURRENT
4
= V
I
6
V
LDO
SUPP
CM
10
(mA)
(V)
V
8
SUPB
= V
= 13V
10
100
SUPN
FIGURE 7
12
1000
= V
14
SUPB
250mA
50mA
2.55V
2.50V
2.45V
-0.2
-0.6
-1.0
1.0
0.6
0.2
= V
4
A. I
B. V
FIGURE 7
INPUT OFFSET VOLTAGE DEVIATION
SUPL
LDO
LDO
EXTERNAL LINEAR-REGULATOR
vs. BUFFER SUPPLY VOLTAGE
LOAD-TRANSIENT RESPONSE
= 50mA TO 250mA, 200mA/div
= 2.5V, 50mV/div
6
= 8V, BUF- = BUFOUT,
8
100μs/div
V
SUPB
(V)
10
V
CM
= V
12
MAX1778 toc35
SUPB
/ 2
14
A
B