MAX1775 Maxim, MAX1775 Datasheet - Page 5

• Manufacturer Part Number: MAX1775
• Description: Dual-Output Step-Down DC-DC Converter for PDA/Palmtop Computers
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(V
(Note 2)
Maximum Duty Cycle
Minimum On-Time
Minimum Off-Time
CORE REGULATOR
Input Voltage Range
INC Undervoltage Lockout
Core Output Voltage Adjust
Range
Maximum Core Load Current
FBC Regulation Threshold
FBC Input Current
Dropout Voltage (INC to LXC)
LXC Leakage Current
LXC P-Channel, N-Channel
On-Resistance
LXC P-Channel Current Limit
LXC P-Channel Minimum
Current
LXC N-Channel Valley Current
LXC N-Channel Zero-Crossing
Current
Maximum Duty Cycle
Minimum On-Time
Minimum Off-Time
REFERENCE
Reference Voltage
Reference Load Regulation
Reference Line Regulation
Reference Sink Current
CVL, CVH REGULATORS
CVL Output Voltage
CVH Output Voltage
CVL Undervoltage Lockout
IN
= +12V, V
DC-DC Converter for PDA/Palmtop Computers
PARAMETER
MAIN
= V
_______________________________________________________________________________________
INC
= V
CS-
= V
SYMBOL
CS+
V
V
V
V
V
I
I
I
FBC
LXC
REF
CVH
FBC
CVL
INC
REF
= +3.3V, V
V
V
(Note 1)
V
V
I
V
I
V
I
I
V
V
V
V
OUTC
REF
REF
CVL
INC
INC
INC
FBC
INC
CS-
IN
IN
CVL
CVL
= +4V, I
= +12V, I
CORE
= 0 to 50µA
= 50µA
= 50mA, V
= +2.5V to +5.5V,
rising
falling
= +2.5V to +5.5V, I
= +5.5V, V
rising
falling
= +1.3V
= 400mA
= +1.8V, Circuit of Figure 4, T
CVH
CVH
CONDITIONS
IN
LXC
= 25mA
= +2.7V, V
= 50mA
Dual-Output Step-Down
= 0 to +5.5V
OUTC
CS-
= 0 to 200mA
= 0
A
-40°C to +85°C, unless otherwise noted.)
1200
2.39
2.29
0.97
1.22
2.40
2.30
MIN
100
200
200
-0.1
100
880
100
150
150
2.6
1.0
-10
2.6
35
10
1
V
V
IN
IN
MAX
3050
2450
2.55
2.45
1.03
1.27
2.55
2.45
650
650
400
175
670
670
5.5
5.0
0.1
0.2
0.5
3.1
10
10
5
- 2.8
- 3.7
UNITS
mA
mA
mA
mA
mV
mV
µA
µA
µA
ns
ns
ns
ns
%
%
A
Ω
V
V
V
V
V
V
V
V
V
5