TOP252-262
Y, E/L and M Package
CONTROL (C)
TOPSwitch-HX
200 MA
(Negative Current Sense - ON/OFF,
Current Limit Adjustment)
VBG + VT
EXTERNAL CURRENT LIMIT (X)
VOLTAGE MONITOR (V)
(Voltage Sense)
1 V
VREF
(Positive Current Sense - Undervoltage,
Overvoltage, ON/OFF, Maximum Duty
Cycle Reduction, Output Over-
voltage Protection)
400 MA
PI-4714-071408
Figure 13a. VOLTAGE MONITOR (V) and EXTERNAL CURRENT LIMIT (X) Pin Input Simplified Schematic.
P and G Package
CONTROL (C)
TOPSwitch-HX
200 MA
(Negative Current Sense - ON/OFF,
Current Limit Adjustment)
VBG + VT
MULTI-FUNCTION (M)
VREF
(Positive Current Sense - Undervoltage,
Overvoltage, Maximum Duty Cycle Reduction,
Output Overvoltage Protection)
400 MA
PI-4715-071408
Figure 13b. MULTI-FUNCTION (M) Pin Input Simplified Schematic.
14
Rev. F 01/09
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