MAX1640_09 Datasheet, PDF (3/12 Pages) Maxim Integrated Products – Adjustable-Output, Switch-Mode Current Sources with Synchronous Rectifier

Adjustable-Output, Switch-Mode
Current Source with Synchronous Rectifier
ELECTRICAL CHARACTERISTICS (continued)
(V_IN = +12V, V_OUT = 6V, Circuit of Figure 1, T_A = 0°C to +85°C, unless otherwise noted. Typical values are at T_A = +25°C.)
PARAMETER
PWM Maximum Duty Cycle
Input Low Voltage
Input High Voltage
Input Leakage Current
SYMBOL
V_IL
D0, D1
V_IH
D0, D1
I_IN
D0, D1
CONDITIONS
MIN TYP MAX UNITS
100
%
0.8
V
2.4
V
±1
µA
ELECTRICAL CHARACTERISTICS
(V_IN = +12V, V_OUT = 6V, Circuit of Figure 1, T_A = -40°C to +85°C, unless otherwise noted.)
PARAMETER
Input Voltage Range
Linear-Regulator Output
Voltage, V_IN Referenced
SYMBOL
CONDITIONS
V_IN
V_LDOH
V_IN = 5.5V to 26V,
I_LOAD = 0 to 20mA
MIN
5.5
V_IN -
5.5
TYP
Linear-Regulator Output
Voltage, Ground Referenced
V_LDOL
V_IN = 5.5V to 26V,
I_LOAD = 0 to 20mA
4.5
Full-Scale Current-Sense
MAX1640
141
Threshold
MAX1641
146
Quarter-Scale Current-Sense
MAX1640
34
Threshold
MAX1641
33
Output Current Compliance
Quiescent V_IN Supply Current
V_OUT = 2V to 24V (MAX1640)
D0 or D1 = high
Output Current in Off Mode
D0 = D1 = low
V_LDOL Undervoltage Lockout
4.0
Reference Voltage
V_REF
1.94
Reference Load Regulation
I_REF = 0 to 50µA
V_SET Input Current
FET Drive Output Resistance
Off-Time Range
1.5
Off-Time Accuracy
R_TOFF = 62kΩ
1.5
Pulse-Trickle Mode Duty-Cycle
Period
D0 = low, D1 = high, R_TOFF = 50kΩ
25
PWM Maximum Duty Cycle
100
Input Low Voltage
V_IL
D0, D1
Input High Voltage
V_IH
D0, D1
2.4
Input Leakage Current
I_IN
D0, D1
Note 2: This ratio is generated by a 1:8 clock divider and is not an error source for current calculations.
MAX
26
V_IN -
4.5
UNITS
V
V
5.5
V
159
mV
154
48
mV
42
0.4
%/V
4
mA
1
µA
4.4
V
2.06
V
10
mV
1
µA
12
Ω
8
µs
2.5
µs
42
ms
%
0.8
V
V
±1
µA
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