Datasheet

LTC4211
12
4211fb
BLOCK DIAGRAM
–
+
V
REF
V
REF
–
+
+
–
+
–
SLOW
COMP
50mV 150mV
0.2V
COMP7
M3
GLITCH FILTER
(SEE NOTE 1)
UVLO
–
+
FAST
COMP
–
+
–
+
300ns
DELAY
GLITCH FILTER
150μs
GLITCH FILTER
FUNCTION OF
OVERDRIVE
BG
V
REF
0.2V
V
REF
= 1.236V
CB
TRIPS
OR UVLO
ON LOW
START-UP
CURRENT
REGULATOR
GATE
CHARGING
200μA 10μA
POWER BAD
CB TRIPS
V
REF
10μA
6 (7)GATE7 (8)SENSE8 (9)V
CC
M1
CHARGE
PUMP
Z1
V
Z
(TYP) = 12V
M2
GND
4 (5)
FAULT
(10)
MS ONLY
–
+
COMP1
2 ON 5 (6)
4211 BD
FB
COMP2
–
+
–
+
COMP3
t
TIMER
0.2V
V
REF
COMP4
–
+
V
REF
COMP5
NORMAL, RESET
NOTE 1: SET BY FILTER CAPACITOR FOR MS
20μs DEFAULT FOR MS8, S8
PIN NUMBERS FOR S8/MS8 (MS)
NORMAL
FAULT
TIMER
3 (4)
FILTER
(3)
MS ONLY
2μA
M6
M5
V
CC
2μA
M4
V
CC
10μA
LOGIC
RESET
1
COMP6
Z2
V
Z
(TYP) = 26V
V
CC