MAX1775 Maxim, MAX1775 Datasheet - Page 3

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

ELECTRICAL CHARACTERISTICS (continued)
(V
Typical values are at T
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
LXC Dead Time
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
CVL Switchover Threshold
CVH Output Voltage
CVH Switchover Threshold
CVL Undervoltage Lockout
IN
= +12V, V
DC-DC Converter for PDA/Palmtop Computers
PARAMETER
MAIN
= V
_______________________________________________________________________________________
A
INC
= +25°C.)
= V
CS-
= V
SYMBOL
CS+
V
V
V
V
V
I
I
I
I
CLC
V
FBC
LXC
REF
CVH
FBC
REF
CVL
INC
IN
= +3.3V, V
V
V
(Note 1)
V
V
I
V
I
V
I
I
V
V
V
V
V
V
OUTC
REF
CVL
CVL
INC
INC
INC
FBC
INC
CS
CS-
IN
IN
IN
CVL
CVL
- = +2.5V to +5.5V, I
= +4V, I
= +12V, I
rising, hysteresis = 350mV (typ)
CORE
= 0 to 50µA
= 50mA, V
= 50mA, V
rising, hysteresis = 100mV (typ)
rising
falling
= +2.5 to +5.5V, I
= +5.5V, V
rising
falling
= +1.3V
= 400mA
= +1.8V, Circuit of Figure 4, T
CVH
CVH
CONDITIONS
IN
CS
LXC
= 25mA
= +2.7V, V
= 50mA
- = +3.3V
Dual-Output Step-Down
= 0 to +5.5V
OUTC
REF
CS
= 50µA
= 0 to 200mA
- = 0
A
= 0°C to +85°C, unless otherwise noted.
1200
MIN
2.40
2.30
0.97
1.23
2.40
2.40
2.30
-0.1
100
900
100
170
170
-10
2.6
1.0
2.6
40
10
1
V
V
IN
IN
1800
1400
TYP
2.47
2.37
0.25
1.25
2.47
2.47
2.37
200
110
400
400
1.5
1.0
0.1
2.8
3.2
5.5
50
- 3.4 V
- 4.3 V
IN
IN
MAX
3000
2400
2.55
2.45
1.03
0.25
1.27
2.55
2.55
2.45
400
170
670
670
5.5
5.0
0.5
3.1
0.1
10
10
5
- 2.8
- 3.7
UNITS
mA
mA
mA
mA
mV
mV
µA
µA
µA
ns
ns
ns
%
Ω
V
V
V
A
V
V
V
V
V
V
V
V
3