MAX1623 Maxim, MAX1623 Datasheet - Page 2

• Manufacturer Part Number: MAX1623
• Description: 3A / Low-Voltage / Step-Down Regulator with Synchronous Rectification and Internal Switches
• Manufacturer: Maxim

ABSOLUTE MAXIMUM RATINGS
IN to PGND .....................................................................0V to 6V
V
PGND to GND.....................................................................±0.5V
IN to V
LX to PGND.................................................................-0.5V to 6V
SHDN to GND .............................................................-0.3V to 6V
REF, FBSEL, COMP, FB, TOFF to GND .....-0.3V to (V
3A, Low-Voltage, Step-Down Regulator with
Synchronous Rectification and Internal Switches
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
+25°C.)
2
CC
Input Voltage Range
Output Voltage
Output Adjustment Range
Reference Output Voltage
Reference Load Regulation
Current-Limit Threshold
PMOS Switch On-Resistance
NMOS Switch On-Resistance
Maximum Switching Frequency
Idle Mode Threshold (Note 2)
No-Load Supply Current
Shutdown Supply Current
LX Leakage Current
Thermal Shutdown Threshold
Undervoltage Lockout Threshold
FB Input Bias Current
Error-Amplifier Gain Bandwidth
Off-Time Adjustment Range
Off-Time Default Period
AC Output Load Regulation
SHDN Input Current
SHDN Input Low Voltage
SHDN Input High Voltage
IN
_______________________________________________________________________________________
to GND ................................................................-0.3V to 6V
= V
CC
CC
.............................................................................±0.5V
= +5V, FBSEL unconnected, R
PARAMETER
V
I
FBSEL = GND or REF (Note 1)
I
I
V
V
I
Does not include switching losses
SHDN = GND
V
V
FBSEL = GND, adjustable output mode, V
(Note 1)
FBSEL = GND
FBSEL = REF
SHDN = GND or V
LOAD
REF
REF
LOAD
IN
IN
IN
IN
CC
TOFF
= 4.5V to 5.5V,
= 4.5V
= 4.5V
= 5.5V, V
= 0
= -1µA to 10µA
falling, 100mV hysteresis
= 0 to 3A
≥ 1.5A (Note 1)
= 110kΩ, T
CC
LX
+ 0.3V)
= 5.5V or 0
CC
CONDITIONS
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
FBSEL = unconnected
FBSEL = V
FBSEL = GND or REF
REF Short to GND ......................................................Continuous
Continuous Power Dissipation (T
on 1 sq. inch of one ounce copper)
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
20-Pin SSOP (derate 22mW/°C above +70°C) ................1.3W
CC
FB
= 1.2V
3.296
1.089
1.089
V
2.49
3.65
0.85
MIN
500
4.5
4.1
-25
0.5
REF
-1
1
2
A
= +70°C) (with part mounted
3.330
2.525
1.100
1.100
TYP
1.25
1.00
0.03
400
145
0.5
4.2
55
60
1
2
3.366
2.550
1.110
1.110
MAX
3.80
4.65
1.15
±20
100
100
350
525
5.5
1.5
4.3
0.8
10
25
1
4
1
UNITS
kHz
kHz
mΩ
mΩ
mV
µA
µA
µA
°C
nA
µA
µs
µs
%
V
V
V
V
A
A
V
V
V
A
=