LTC2922_15 Datasheet, PDF (7/20 Pages) Linear Technology – Power Supply Tracker with Input Monitors

W
FUNCTIONAL DIAGRA
LTC2921/LTC2922 Series
SENSE
V_CC
50mV
+–
OVERCURRENT
–
LATCH
+
UNDERVOLTAGE
P_G
ENABLE
V_PUMP
4µA
PG
V1
V2
V3
V4
0.7V
0.5V
– _OVERVOLTAGE
+
+ _MONITOR
–
– _OVERVOLTAGE
+
+ _MONITOR
–
– _OVERVOLTAGE
+
+ _MONITOR
–
– _OVERVOLTAGE
+
+ MONITOR
–
– _OVERVOLTAGE
+
+ _MONITOR
–
V_PUMP ≈ 11.1V
+
–
AT V_CC =5V
APPROXIMATELY 1V
V_SWON
1.2V
0.7V
0.5V
REFERENCE
GENERATOR
AND
CHARGE
PUMP
(LTC2922 ONLY)
D0
D1
REMOTE
SENSE
SWITCH
ENABLE
V_PUMP
REMOTE
SENSE
SWITCH
GATE
CONTROL
LOGIC
V_PUMP
10µA
GATE
ENABLE
+
GATE
ON
V_CC
2µA
TIMER
ENABLE
V_CC
CIRCUIT
BREAKER
RESET PULSE
TIMER ENABLE
V_SWON
+
TIMER
DONE
PULSE
TIMER
+ _DONE
GATE
TIMER
1.2V
+
SWITCHES ON
(LTC2922 ONLY)
D2
D3
D4
V_SWON
2921/22 F01
GND
S0
S1
S2
S3
S4
(LTC2922 ONLY)
(LTC2922 ONLY)
Figure 1. LTC2921 and LTC2922 Functional Diagram
29212fa
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