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ADM1041
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
CURRENT LIMIT ERROR AMPLIFIER
See Figure 13
Current Limit Trim Range 2
Current Limit Trim Step
Current Limit Trim Step
105
1.1
26.5
130
%
%
mV
After I SHARE calibration
2.0 ≤ V SHARE ≤ 2.8 V typ. 5 bits, 31 steps.
Reg 04h[7:3]. See Table 13.
Transconductance
Output Source Current
Output Sink Current
100
200
40
40
300
μA/V
μA
μA
I CCMP = ±20 μA. See Figure 12.
V CCMP = > 1 V
V CCMP = < V DD – 1 V
CURRENT SHARE DRIVER
See Figure 14.
Output Voltage 6
Short Circuit Source Current
V DD – 0.4
55
V
mA
R L = 1 k?, V SHRS ≤ V DD – 2 V
Source Current
15
mA
Current at which V OUT does not drop
by more than 5%
Sink Current
60
100
μA
V SHARE = 2.0 V
CURRENT SHARE DIFFERENTIAL SENSE
AMPLIFIER
See Figure 14.
V S – Input Voltage
V SHRS Input Voltage
0.5
V DD – 2
V
V
Voltage on Pin 20
Voltage on Pin 23
Input Impedance 2
Gain
65
100
1.0
k?
V/V
V SHRS = 0.5 V, V S ? = 0.5 V
CURRENT SHARE ERROR AMPLIFIER
Transconductance, SHRS to SCMP
Output Source Current
Output Sink Current
Input Offset Voltage
100
40
200
40
40
50
300
60
μA/V
μA
μA
mV
I SCMP = ±20 μA
V SCMP > 1 V
V SCMP < V DD – 1 V
Master/slave arbitration
Share OK Window Comparator Threshold
SHRS = 2 V ± SHR THRESH
(Share Drive Error)
±100
±200
±300
±400
mV
mV
mV
mV
Reg 04h[1:0] = 00. See Table 13.
Reg 04h[1:0] = 01. See Table 13.
Reg 04h[1:0] = 10. See Table 13.
Reg 04h[1:0] = 11. See Table 13.
CURRENT LIMIT
Figure 10.
Current Limit Control Lower Threshold
Current Limit Control Upper Threshold
CURRENT SHARE CAPTURE
1.3
3.5
V
V
V CCMP = 0.7 V, V S + = 1.5 V
V S + = 0 V, V SCMP = 0 V
V SCMP = 3.5 V.
Current Share Capture Range
Capture Threshold
0.7
1.4
2.1
2.8
0.6
1
2
3
4
1.0
1.3
2.6
3.9
5.2
1.4
%
%
%
%
V
Reg 10h[5:4] = 00. See Table 25.
Reg 10h[5:4] = 01. See Table 25.
Reg 10h[5:4] = 10. See Table 25.
Reg 10h[5:4] = 11. See Table 25.
FET OR GATE DRIVE
Open-drain N-channel FET
Output Low Level (On)
0.4
0.8
V
V
I IO = 5 mA
I IO = 10 mA
Output Leakage Current
REVERSE VOLTAGE COMPARATOR, FS, FD
?5
+5
μA
V CS? = FS
Common-Mode Range
0.25
2.0
V DD – 2
V
Voltage set by C S resistor divider
Voltage on C S ? pin. T A = 25°C.
Rev. A | Page 9 of 64
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