LTC3446 Datasheet, PDF (9/20 Pages) Linear Technology – Monolithic Buck Regulator with Dual VLDO Regulators

LTC3446
BLOCK DIAGRAM
BUCKFB
12
3
I_TH
ENBUCK
0.4V
0.8V
VOLTAGE
REFERENCE
ERROR
AMPLIFIER
+
I_TH
PARK
I_TH
LIMIT
–
BCLAMP
B
SOFT-START
PMOS CURRENT
COMPARATOR
–
+
+
V_B
BURST
COMPARATOR
OSCILLATOR
SLOPE
COMPENSATION
2
V_IN
SW
14
PGOOD
4
POWER
GOOD
ENBUCK
13
MODESEL
1
ENLDO1
11
SOFT-START
ENLDO2
8
SOFT-START
LOGIC
NMOS
OVERCURRENT
COMPARATOR
REVERSE
CURRENT
COMPARATOR
V_IN
+
V_LDO1
–
6μA
V_IN
+
V_LDO2
–
6μA
GND
15
EXPOSED
PAD
LV_IN
6
LV_OUT1
5
LV_FB1
10
LV_OUT2
7
LV_FB2
9
3446 BD
3446fd
9