Typical operating characteristics (continued) – Rainbow Electronics MAX1885 User Manual
Page 15
MAX1778/MAX1880–MAX1885
Quad-Output TFT LCD DC-DC
Converters with Buffer
______________________________________________________________________________________
15
0
-0.6
-0.2
0.2
0.6
1.0
-40
10
-15
35
60
85
MAX1778 toc39
TEMPERATURE (
°C)
∆
V
OS
(mV)
INPUT OFFSET VOLTAGE DEVIATION
vs. TEMPERATURE
V
SUPB
= 13V
V
CM
= V
SUPB
/ 2
0
-0.6
-0.2
0.2
0.6
1.0
-40
10
-15
35
60
85
MAX1778 toc39
TEMPERATURE (
°C)
∆
V
OS
(mV)
INPUT OFFSET VOLTAGE DEVIATION
vs. TEMPERATURE
V
SUPB
= 13V
V
CM
= V
SUPB
/ 2
0
2
6
4
8
10
0
4
2
6
8
10
12
14
MAX1778 toc41
V
CM
(V)
I
BIAS
(nA)
BUFFER INPUT BIAS CURRENT
vs. COMMON-MODE VOLTAGE
V
SUPB
= 4.5V
V
SUPB
= 13V
4
6
8
10
4
8
6
10
12
14
MAX1778 toc42
V
SUPB
(V)
I
BIAS
(nA)
BUFFER INPUT BIAS CURRENT
vs. BUFFER SUPPLY VOLTAGE
V
CM
= V
SUPB
/ 2
4
5
6
7
8
9
10
11
12
-40
-15
10
35
60
85
MAX1778 toc43
TEMPERATURE (
°C)
I
BIAS
(nA)
BUFFER INPUT BIAS CURRENT
vs. TEMPERATURE
V
CM
= V
SUPB
/ 2
0.30
0.34
0.42
0.38
0.46
0.50
0
4
2
6
8
10
12
14
MAX1778 toc44
V
CM
(V)
I
SUPB
(mA)
BUFFER SUPPLY CURRENT
vs. COMMON-MODE VOLTAGE
V
SUPB
= 4.5V
V
SUPB
= 13V
0.30
0.34
0.38
0.42
0.46
0.50
4
8
6
10
12
14
MAX1778 toc45
V
SUPB
(V)
I
SUPB
(mA)
BUFFER SUPPLY CURRENT
vs. BUFFER SUPPLY VOLTAGE
V
CM
= V
SUPB
/ 2
0
0.3
0.2
0.1
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-40
10
-15
35
60
85
I
SUPB
(mA)
MAX1778 toc46
TEMPERATURE (
°C)
NO-LOAD BUFFER SUPPLY CURRENT
vs. TEMPERATURE
V
SUPB
= 13V
V
CM
= V
SUPB
/ 2
MAX1778 toc47
B
A
4.00V
3.95V
4.05V
4.00V
3.95V
4.05V
4
µs/div
VCOM BUFFER
SMALL-SIGNAL RESPONSE
A. V
BUF+
= 3.95V TO 4.05V, 50mV/div
B. BUFOUT = BUF-, 50mV/div
C
BUF
= 1
µF, V
SUPB
= 8V
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
IN
= +3.3V, SHDN = IN, V
MAIN
= V
SUPP
= V
SUPN
= V
SUPB
= V
SUPL
= 8V, BUF- = BUFOUT,
BUF+ = FLTSET = TGND = PGND = GND, T
A
= +25°C.)