Electrical characteristics (continued) – Rainbow Electronics MAX1625 User Manual
Page 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= V
CC
= D4 = +5V, PGND = AGND = D0–D3 = 0V, R
FREQ
= 33.3k
Ω
,
T
A
= 0°C to +85°C
, unless otherwise noted.)
MAX1624/MAX1625
_______________________________________________________________________________________
3
DH = DL = 2.5V
V
DD
= 4.5V
BST - LX = 4.5V
LG = GND (low)
100mV overdrive
R
FREQ
= 20k
Ω
With respect to V
REF
,
FB going low
Minimum
MAX1625, CSH = CSL = 1.1V
D0–D4 = 0V, 5V
D0–D4; V
CC
= 4.5V
LG = REF (mid)
MAX1624, CSH = CSL = 1.3V,
D0–D3 = 5V, D4 = 0V
D0–D4; V
CC
= 5.5V
CONDITIONS
-2.75
-2
-1.25
LG = V
CC
(high)
ns
0
30
FB = 1.1V
DH, DL Dead Time
A
2
DH, DL Source/Sink Current
Ω
0.7
2
Maximum
DH On-Resistance
0.7
2
%
-3
-1
µA
100
CC2 Source/Sink Current
4
V
CC
V
2.4
3.0
mmho
1
k
Ω
10
CC1 Output Resistance
µA
±0.1
50
3.3
3.7
0.2
%
85
90
Maximum Duty Cycle
LG Input Voltage
µA
50
CSH, CSL Input Current
µA
4
LG Input Current
µA
±1
D0–D4 Input Current
V
2.0
Logic Input Voltage High
V
CC
- 0.2
V
0.8
Logic Input Voltage Low
UNITS
MIN
TYP
MAX
PARAMETER
FB Input Current
CC2 Clamp Voltage
CC2 Transconductance
PDRV Trip Level
PDRV, NDRV Response Time
FB overdrive = 5%
ns
75
PDRV, NDRV On-Resistance
V
DD
= 4.5V
Ω
2
5
PDRV, NDRV Source/Sink Current
PDRV = NDRV = 2.5V
A
0.5
PDRV, NDRV Minimum On-Time
ns
100
Current-Limit Trip Voltage
mV
85
100
115
Soft-Start Time
To full current limit
1 / f
OSC
1536
BST Leakage Current
BST = 12V, LX = 7V, REF = GND
µA
50
V
High-Speed Step-Down Controllers with
Synchronous Rectification for CPU Power
Ω
DL On-Resistance
NDRV Trip Level
With respect to V
REF
,
FB going high
1.25
2
2.75
%
1
3
T
A
= +25°C
T
A
= 0°C to +85°C
T
A
= +25°C
T
A
= 0°C to +85°C