LTC3252 Datasheet, PDF (5/12 Pages) Linear Technology – Dual, Low Noise, Inductorless Step-Down DC/DC Converter

LTC3252
PI FU CTIO S
C2^– (Pin 8): Flying Capacitor 2 Negative Terminal (C2).
OUT2 (Pin 9): Regulated Output Voltage 2. OUT2 is
disconnected from V_IN when in shutdown. Bypass OUT2
with a low ESR ceramic capacitor to GND (C_O2). See
Output Capacitor Selection section for size requirements.
C2⁺ (Pin 10): Flying Capacitor 2 Positive Terminal (C2).
EN2 (Pin 11): Input Enable Pin 2. When EN2 is high, OUT2
is enabled. When EN2 is low OUT2 is shut down.
FB2 (Pin 12): Feedback Input Pin 2. An output divider
should be connected from OUT2 to FB2 to program the
output voltage.
W
W
SI PLIFIED BLOCK DIGRAM
OVERTEMPERATURE
V_IN 3
EN1
EN2
2
11
SWITCH
CONTROL
–
BURST
DETECT
CIRCUIT
+
–
+
SPREAD SPECTRUM
OSCILLATOR
CHARGE
PUMP 1
4 C1⁺
5 OUT1
6 C1^–
1 FB1
CHARGE
PUMP 2
10 C2⁺
9 OUT2
8 C2^–
12 FB2
7
GND
3252 SBD
3252f
5