Max1623, Electrical characteristics – Rainbow Electronics MAX1623 User Manual
Page 3
MAX1623
_______________________________________________________________________________________
3
3A, Low-Voltage, Step-Down Regulator with
Synchronous Rectification and Internal Switches
ELECTRICAL CHARACTERISTICS
(V
IN
= V
CC
= 5V, FBSEL unconnected, R
TOFF
= 110k
Ω, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 4)
Note 2: Guaranteed by design, not production tested.
Note 3: Idle Mode threshold is defined as the transition point in the load-current range between Idle Mode and constant-off-time
operation.
Note 4: Specifications to -40°C are guaranteed by design, not production tested.
SHDN = GND or V
CC
V
IN
= 4.5V to 5.5V,
I
LOAD
= 0 to 3A
FBSEL = GND, adjustable output mode, V
FB
= 1.2V
V
CC
falling, 100mV hysteresis
V
IN
= 4.5V
V
IN
= 5.5V, V
LX
= 5.5V or 0
SHDN = GND
V
IN
= 4.5V
V
FBSEL = GND or REF (Note 2)
I
REF
= 0
Does not include switching losses
CONDITIONS
V
0.8
FBSEL = unconnected
SHDN Input Low Voltage
µA
-1
1
FBSEL = V
CC
SHDN Input Current
FBSEL = GND or REF
2.2
SHDN Input High Voltage
µs
0.85
1.25
Off-Time Default Period
µs
0.55
4
Off-Time Adjustment Range
nA
-50
50
FB Input Bias Current
V
4.0
4.3
Undervoltage Lockout Threshold
µA
-20
20
LX Leakage Current
µA
10
Shutdown Supply Current
µA
600
No-Load Supply Current
2.450
2.550
V
3.234
3.366
V
4.5
5.5
Input Voltage Range
Output Voltage
Ω
0.1
NMOS Switch On-Resistance
Ω
0.1
PMOS Switch On-Resistance
A
3.5
4.75
Current-Limit Threshold
1.075
1.110
V
V
REF
3.8
Output Adjustment Range
V
1.075
1.110
Reference Output Voltage
UNITS
MIN
TYP
MAX
PARAMETER