Electrical characteristics, Electrical characteristics (continued) – Rainbow Electronics MAX1641 User Manual
Page 3
MAX1640/MAX1641
Adjustable-Output, Switch-Mode
Current Source with Synchronous Rectifier
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS
(V
IN
= +12V, V
OUT
= 6V, Circuit of Figure 2,
T
A
=
-40°C to +85°C
, unless otherwise noted.)
I
REF
= 0 to 50µA
V
OUT
= 2V to 24V (MAX1640)
D0 = D1 = low
D0 or D1 = high
FET Drive Output Resistance
MAX1641
MAX1640
V
IN
= 5.5V to 26V,
I
LOAD
= 0 to 20mA
V
IN
= 5.5V to 26V,
I
LOAD
= 0 to 20mA
MAX1640
CONDITIONS
µA
1
V
SET
Input Current
mV
10
Reference Load Regulation
V
1.94
2.06
V
REF
Reference Voltage
V
4.0
4.4
V
LDOL
Undervoltage Lockout
µA
1
Output Current in Off Mode
mA
4
Quiescent V
IN
Supply Current
%/V
0.4
Output Current Compliance
mV
34
48
Quarter-Scale Current-Sense
Threshold
12
Ω
Off-Time Range
V
5.5
26
V
IN
Input Voltage Range
1.5
8
µs
Off-Time Accuracy
R
TOFF
= 62k
Ω
1.5
2.5
µs
146
154
Pulse-Trickle Mode Duty-Cycle
Period
mV
141
159
Full-Scale Current-Sense
Threshold
V
V
IN
-
V
IN
-
5.5
4.5
V
LDOH
Linear-Regulator Output
Voltage, V
IN
Referenced
D0 = low, D1 = high, R
TOFF
= 50k
Ω
25
42
ms
V
4.5
5.5
V
LDOL
Linear-Regulator Output
Voltage, Ground Referenced
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
PWM Maximum Duty Cycle
100
%
Input Low Voltage
V
IL
D0, D1
0.8
V
Input High Voltage
V
IH
D0, D1
2.4
V
Input Leakage Current
I
IN
D0, D1
±
1
µA
33
42
MAX1641
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +12V, V
OUT
= 6V, Circuit of Figure 2,
T
A
=
0°C to +85°C
, unless otherwise noted. Typical values are at T
A
= +25°C.)
CONDITIONS
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
PWM Maximum Duty Cycle
100
%
Input Low Voltage
V
IL
D0, D1
0.8
V
Input High Voltage
V
IH
D0, D1
2.4
V
Input Leakage Current
I
IN
D0, D1
±
1
µA