MAX747 Maxim, MAX747 Datasheet - Page 2

• Manufacturer Part Number: MAX747
• Description: High-Efficiency PWM / Step-Down P-Channel DC-DC Controller
• Manufacturer: Maxim

ABSOLUTE MAXIMUM RATINGS
Supply Voltage V+, AV+ to GND ..............................-0.3V to 17V
AGND to GND..........................................................-0.3V to 0.3V
All Other Pins................................................-0.3V to (V+ + 0.3V)
Reference Current (I
Continuous Power Dissipation (T
ELECTRICAL CHARACTERISTICS
(V+ = 10V, I
High-Efficiency PWM, Step-Down
P-Channel DC-DC Controller
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.
2
Input Voltage Range
Output Voltage
Feedback Voltage
Line Regulation
Load Regulation
Efficiency
OUT Leakage Current
FB Input Logic Low
FB Input Leakage Current
Reference Voltage
Reference Load Regulation
Soft-Start Source Current
Soft-Start Fault Current
Supply Current
Oscillator Frequency
Maximum Duty Cycle
CS Amp I
EXT Output High
EXT Output Low
EXT Sink Current
EXT Source Current
CC Impedance
LBI Threshold Voltage
LBO Output Voltage Low
LBI Input Leakage Current
LBO Output Leakage Current
SHDN Input Voltage Low
SHDN Input Voltage High
SHDN Input Leakage Current
Plastic DIP (derate 10.00mW/°C above +70°C) ..........800mW
SO (derate 8.33mW/°C above +70°C) .........................667mW
CERDIP (derate 9.09mW/°C above +70°C) .................727mW
_______________________________________________________________________________________
PARAMETER
LIM
LOAD
Threshold
= 0mA, I
REF
) ....................................................±2mA
REF
= 0mA, T
A
= +70°C)
SYMBOL
V
V
V
f
V
OSC
LIMIT
V
V
V+
OUT
REF
TH
IH
IL
A
= T
MIN
For regulated outputs
V+ = 6V to 15V, 0V < V+ - CS < 0.125V, FB = 0V
(includes line and load regulation)
V+ - CS = 0V, external
feedback mode
V+ = 6V to 15V, FB = 0V
V+ = 4V to 15V, external feedback mode
0V < V+ - CS < 0.125V
Circuit of Figure 1, I
V
For dual-mode switchover
FB = 2V
I
I
SS = 0V
SS = 2V
Operating, V+ = 15V
Operating, V+ = 10V
Shutdown mode
MAX747C
MAX747E/M
V+ = 6V
V+ - CS
I
I
V
V
LBI falling
I
LBI = 2.5V
V+ = 15V, LBO = 15V, LBI = 2.5V
SHDN = 10V
REF
REF
EXT
EXT
SINK
OUT
EXT
EXT
to T
= -1mA (sourcing)
= 1mA (sinking)
= 0µA
= 0µA to 100µA
= 7.5V
= 2.5V
= 0.5mA
MAX
= 5V
, unless otherwise noted.)
CONDITIONS
LOAD
Operating Temperature Ranges:
Junction Temperature
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
MAX747C
MAX747E/M
MAX747C
MAX747E/M
MAX747C
MAX747EM
= 0.5A to 2.5A
MAX747C_D .......................................................0°C to +70°C
MAX747E_D.....................................................-40°C to +85°C
MAX747MJD ..................................................-55°C to +125°C
MAX747C_D/E_D .........................................................+150°C
MAX747MJD ...............................................................+175°C
V+ – 0.1
4.85
1.96
1.95
1.97
1.96
1.97
1.96
MIN
100
125
2.0
85
80
91
4
TYP
5.08
2.00
2.00
0.05
2.00
2.00
0.95
2.00
2.00
500
100
100
150
110
170
1.3
0.1
0.8
0.6
0.1
91
50
96
24
9
1
MAX
5.25
2.04
2.05
2.03
2.04
0.25
2.03
2.04
100
115
120
175
100
100
0.1
2.5
1.3
0.4
0.4
15
80
40
20
20
1
UNITS
kHz
%V
mA
mA
mA
mV
mV
mV
µA
nA
µA
µA
µA
kΩ
nA
µA
nA
%
%
%
V
V
V
V
V
V
V
V
V
V