Max749 digitally adjustable lcd bias supply, Absolute maximum ratings, Electrical characteristics – Rainbow Electronics MAX749 User Manual
Page 2: Timing characteristics
T
A
= T
MIN
to T
MAX
MIN
MAX
125
300
MAX749
Digitally Adjustable LCD Bias Supply
2
______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
V+ ................................................................................-0.3V, +7V
CTRL, ADJ, FB, DLOW, DHI, CS.....................-0.3V, (V+ + 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C) ............727mW
SO (derate 5.88mW/°C above +70°C) .........................471mW
Operating Temperature Ranges:
MAX749C_A........................................................0°C to +70°C
MAX749E_A .....................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
ELECTRICAL CHARACTERISTICS
(2V < V+ < 6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Note 1:
The device is in regulation when V
FB
= 0V (see Figures 3 - 6).
Note 2:
These tests performed at V+ = 3.3V. Operation over supply range is guaranteed by supply rejection test of full-count current.
Note 3:
V
IH
is guaranteed by design to be 1.8V min for V+ = 2V to 6V for T
A
= T
MIN
to T
MAX
. V
IL
is guaranteed by design from
T
A
= T
MIN
to T
MAX
.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V+ Voltage
2
6
V
FB Source Current
I
FBS
On power-up or reset, V
FB
= 0V (Note 1)
12.80
13.33
13.86
µA
Zero-Count FB Current
V
FB
= 0V
0.45
0.55
I
FBS
Full-Count FB Current
V
FB
= 0V
1.43
1.53
I
FBS
DAC Step Size (Note 2)
Monotonicity guaranteed, V
FB
= 0V
1.00
1.56
2.12
%I
FBS
DAC Linearity (Note 2)
V
FB
= 0V
±1
%I
FBS
Supply Rejection
V+ = 2V to 6V, full-count current
1.5
%I
FBS
Switching Frequency
100 to 500
kHz
Logic Input Current
0V < V
IN
< V+, CTRL, ADJ
±100
nA
Logic High Threshold (Note 3)
V
IH
CTRL, ADJ
1.6
V
Quiescent Current
60
µA
Shutdown Current
15
µA
V+ to CS Voltage
Current-limit trip voltage
110
140
180
mV
DHI Source Current
V+ = 2V, V
DHI
= 1V
24
50
mA
DHI Drive Level
No load
V+ - 50mV
V+
V
DLOW On Resistance
V+ = 2V, V
DLOW
= 0.5V
5
10
Ω
V
Logic Low Threshold (Note 3)
V
IL
CTRL, ADJ
0.4
TIMING CHARACTERISTICS
T
A
= +25°C
MIN
TYP
MAX
PARAMETER
SYMBOL
CONDITIONS
UNITS
Minimum Reset Pulse Width
t
R
V+ = 5V
100
Minimum Reset Setup
t
RS
0
0
Minimum Reset Hold
t
RH
Not tested
0
0
t
SH
V+ = 2V
15
85
100
Minimum ADJ High Pulse Width
V+ = 5V
10
85
100
t
SL
V+ = 2V
170
400
500
Minimum ADJ Low Pulse Width
V+ = 5V
60
150
200
Minimum ADJ Low to CTRL Low
t
SD
V+ = 2V
70
200
250
V+ = 5V
20
85
100
ns
V+ = 2V
400
25
85
Not tested
ns
ns
ns
ns
ns
FB Offset Voltage
±15
mV