?2003 Microchip Technology Inc.
DS20091B-page 23
MCP18480
FIGURE 2-16:
UV
D
 Pin Current vs. I
SET
 Pin
Current.
FIGURE 2-17:
I
SET
Pin Voltage vs. V
REFIN
 
Pin Voltage.
FIGURE 2-18:
DRAINTH Threshold Voltage
vs. Supply current (I
POS
).
Data taken with the minimum following conditions:
-50 礎 < I
ISET
 < 50 礎 (I
ISET
 ` 0)
I
POS
 = 5 mA
  (Enables V
POS
 at its self-regulating voltage)
V
REFIN
 = 2.5V
Note 1:
V
UVTH
 < V
VREFIN
 
V
OVTH
 < V
VREFIN
 
V
SENSE
 = V
VNEG
 
V
VFB
 = V
VNEG
 
V
DRAINTH
 = V
VNEG
 
V
OVO
 = V
VNEG
 
V
CL
 = V
VREFIN
 
V
ENABLE
 = 5V (open)
V
RESTART
 = V
VNEG
 (open)
-60
-50
-40
-30
-20
-10
0
-50  -40  -30  -20  -10   0   10   20   30   40   50
I
SET
 Pin Current (礎)
T
A
 = -40癈
T
A
 = +70癈
T
A
 = +25癈
T
A
 = 0癈
T
A
 = +85癈
Data taken with the minimum following conditions:
I
POS
 = 5 mA
  (Enables V
POS
 at its self-regulating voltage)
Iset = 10 礎
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
2.00   2.10   2.20   2.30   2.40   2.50   2.60
V
REFIN
 Pin Voltage (V)
T
A
 = -40癈
T
A
 = +70癈
T
A
 = +25癈
T
A
 = +85癈
T
A
 = 0癈
Data taken with the minimum following conditions:
3 mA d I
POS
 d 30 mA
 
V
REFIN
 = 2.5V, I
SET
 = 10 礎
Determined by PWRGOOD signal
Note 1:
V
UVTH
 > V
VREFIN
 
V
OVTH
 < V
VREFIN
 
V
SENSE
 = V
VNEG
 
V
VFB
 = V
VNEG
 
V
OVO
 = V
VNEG
 
V
CL
 = V
VREFIN
 
V
ENABLE
 = 5V (open)
V
RESTART
 = V
VNEG
 (open)
105
106
107
108
109
110
111
112
5  6  7  8  9  10 11 12 13 14 15 16 17 18 19 20
Supply Current, I
POS
 (mA)
T
A
 = -40癈
T
A
 = +70癈
T
A
 = +25癈
T
A
 = 0癈
T
A
 = +85癈
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