MAX1775 Maxim, MAX1775 Datasheet - Page 2

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

ABSOLUTE MAXIMUM RATINGS
IN, SHDNM, CVH to GND.......................................-0.3V to +30V
IN to CVH, PDRV ......................................................-0.3V to +6V
PDRV to GND..................................(V
PGND to GND .......................................................-0.3V to +0.3V
All Other Pins to GND...............................................-0.3V to +6V
Core Output Short Circuit...........................................Continuous
Dual-Output Step-Down
DC-DC Converter for PDA/Palmtop Computers
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.
ELECTRICAL CHARACTERISTICS
(V
Typical values are at T
2
Input Voltage
Input Quiescent Supply Current
CS- Quiescent Supply Current
Core Regulator Quiescent
Supply Current
IN Shutdown Supply Current
MAIN REGULATOR
Main Output Voltage Adjust
Range
FBM Regulation Threshold
FBM Input Current
Current-Limit Threshold
Minimum Current-Limit
Threshold
Valley Current Threshold
Zero Current Threshold
PDRV, NDRV Gate Drive
Resistance
CS- to CVL Switch Resistance
PDRV, NDRV Dead Time
Maximum Duty Cycle
Minimum On-Time
Minimum Off-Time
IN
_______________________________________________________________________________________
= +12V, V
PARAMETER
MAIN
= V
A
INC
= +25°C.)
= V
CS-
= V
CVH
SYMBOL
V
V
CS+
V
VALLEY
V
V
I
I
I
ZERO
V
FBM
CS
INC
CLM
I
FBM
MIN
IN
- 0.3V) to (V
IN
-
= +3.3V, V
V
V
V
V
V
V
SHDNM = SHDNC = GND
V
V
V
V
V
V
V
I
CVL
FBM
FBM
FBM
( C S + - C S - )
FBM
CS+
CS+
CS+
CS+
CS
SHDNM
SHDNM
SHDNM
IN
- = +3.3V, I
CORE
= 50mA
- V
- V
- V
- V
= +1.5V, V
= +1.5V, V
= +1.5V, V
= +1.3V
+ 0.3V)
CS-
CS
CS
CS
= V
= V
= V
-
-
-
= +1.8V, Circuit of Figure 4, T
= 0 to + 60m V , V
SHDNC
SHDNC
SHDNC
LOAD
CONDITIONS
FBC
FBC
FBC
Continuous Power Dissipation
Operating Temperature .......................................-40°C to +85°C
Storage Temperature.........................................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
= +3.3V
= +3.3V
= +3.3V
= +1.5V,
= +1.5V,
= +1.5V,
= 50mA
16-Pin QSOP (derate 7.1mW/°C above +70°C)..........571mW
IN
= + 2.7V to + 28V
A
= 0°C to +85°C, unless otherwise noted.
MIN
1.25
1.21
-0.1
100
200
200
2.7
60
40
6
0
TYP
1.25
110
400
400
4.5
80
15
60
15
50
50
5
2
MAX
1.29
220
120
100
650
650
5.5
0.1
4.4
28
30
30
24
60
15
8
UNITS
mV
mV
mV
mV
µA
µA
µA
µA
µA
ns
ns
ns
%
Ω
Ω
V
V
V