MAX1623 Maxim, MAX1623 Datasheet - Page 3

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

ELECTRICAL CHARACTERISTICS
(V
Note 1: Guaranteed by design, not production tested.
Note 2: Idle Mode threshold is defined as the transition point in the load-current range between Idle Mode and constant-off-time
Note 3: Specifications to -40°C are guaranteed by design, not production tested.
Synchronous Rectification and Internal Switches
Input Voltage Range
Output Voltage
Output Adjustment Range
Reference Output Voltage
Current-Limit Threshold
PMOS Switch On-Resistance
NMOS Switch On-Resistance
No-Load Supply Current
Shutdown Supply Current
LX Leakage Current
Undervoltage Lockout Threshold
FB Input Bias Current
Off-Time Adjustment Range
Off-Time Default Period
SHDN Input Current
SHDN Input Low Voltage
SHDN Input High Voltage
IN
= V
CC
operation.
= +5V, FBSEL unconnected, R
PARAMETER
3A, Low-Voltage, Step-Down Regulator with
_______________________________________________________________________________________
V
I
FBSEL = GND or REF (Note 1)
I
V
V
Does not include switching losses
SHDN = GND
V
V
FBSEL = GND, adjustable output mode, V
SHDN = GND or V
LOAD
REF
IN
IN
IN
IN
CC
TOFF
= 4.5V to 5.5V,
= 4.5V
= 4.5V
= 5.5V, V
= 0
falling, 100mV hysteresis
= 0 to 3A
= 110kΩ, T
LX
= 5.5V or 0
A
CC
CONDITIONS
= -40°C to +85°C, unless otherwise noted.) (Note 3)
FBSEL = unconnected
FBSEL = V
FBSEL = GND or REF
CC
FB
= 1.2V
3.234
2.450
1.075
1.075
V
MIN
0.55
0.85
-20
-50
4.5
3.5
4.0
2.2
REF
-1
TYP
3.366
2.550
1.110
1.110
MAX
4.75
1.25
600
5.5
3.8
0.1
0.1
4.3
0.8
10
20
50
4
1
UNITS
µA
µA
µA
nA
µA
µs
µs
A
V
V
V
V
V
V
V
3