Typical operating characteristics, Electrical characteristics (continued) – Rainbow Electronics MAX1775 User Manual
Page 6
100
0
1
10
100
1000
10,000
MAIN OUTPUT EFFICIENCY vs. LOAD
20
MAX1775 toc01
LOAD (mA)
EFFICIENCY (%)
40
60
80
70
50
30
10
90
V
IN
= +12V
V
IN
= +15V V
IN
= +18V
V
IN
= +5V
V
IN
= +3.3V
90
0
1
1000
100
10
CORE OUTPUT EFFICIENCY vs. LOAD
30
10
70
50
100
40
20
80
60
MAX1775 toc02
LOAD (mA)
EFFICIENCY (%)
V
INC
= +3.3V
V
INC
= +5V
V
INC
= +2.7V
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
1.5
2.0
-40
-15
10
35
60
85
V
REF
ACCURACY vs. TEMPERATURE
MAX1775 toc03
TEMPERATURE (°C)
V
REF
ACCURACY (%)
Typical Operating Characteristics
(Circuit of Figure 1, V
MAIN
= +3.3V, V
CORE
= +1.8V, T
A
= +25°C, unless otherwise noted.)
MAX1775
Dual-Output Step-Down
DC-DC Converter for PDA/Palmtop Computers
6
_______________________________________________________________________________________
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
LOGIC INPUTS
SHDNM, SHDNC Input Low
Voltage
0.4
V
SHDNM, SHDNC Input High
Voltage
2.0
V
SHDNM, SHDNC Input Low
Current
SHDNM = SHDNC = GND
-1
1
µA
SHDNC Input High Current
V
SHDNC
= +5.5V
5
µA
SHDNM Input High Current
V
SHDNM
= +28V
30
µA
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +12V, V
MAIN
= V
INC
= V
CS-
= V
CS+
= +3.3V, V
CORE
= +1.8V, Circuit of Figure 4, T
A
-40°C to +85°C, unless otherwise noted.)
(Note 2)
Note 1: This parameter is guaranteed based on the LXC P-channel current limit and the LXC N-channel valley current.
Note 2: Specifications to -40°C are guaranteed by design and not production tested.