LTC3527 Linear Technology Corporation, LTC3527 Datasheet - Page 9

• Manufacturer Part Number: LTC3527
• Description: 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters
• Manufacturer: Linear Technology Corporation

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BLOCK DIAGRAM
TO 5V
0.88V
V
IN
L1
4.7µH
L2
4.7µH
C
4.7µF
IN
16
15
10
12
13
6
4
1
3
7
9
V
SHDN1
SHDN2
REF_GD
MODE
SW1
V
PGOOD1
V
FSEL
SW2
V
PGOOD2
IN1
IN
IN2
SHUTDOWN
SHUTDOWN
AND V
AND V
SLOPE COMPENSATION
SLOPE COMPENSATION
–
–
V
V
START1
START2
REF_GD
REF_GD
I
REF
I
REF
+ +
+ +
BIAS
LIM
BIAS
LIM
OSC1
OSC2
SD1
SD2
OSCILLATOR
OSCILLATOR
PWM
COMP
START-UP
PWM
COMP
–
+
–
+
SLP1
SLP2
SD1
SD2
ANTI-RING
ANTI-RING
DRIVERS
DRIVERS
+
+
FB1
1.20V - 9%
FB2
1.20V - 9%
LOGIC
+
LOGIC
+
PWM
PWM
AND
AND
START1
START2
CONVERTER 1
CONVERTER 2
OSC1
SLP1
OSC2
SLP2
SHARED
0.30Ω
0.50Ω
CONTROL
CONTROL
CURRENT
SENSE
CURRENT
SENSE
MODE
MODE
BURST2
BURST 1
THERMAL SD
REFERENCE
SD1
TSD
SD2
TSD
UVLO
BULK CONTROL SIGNALS
BULK CONTROL SIGNALS
0.40Ω
0.60Ω
V
V
V
V
C1
C2
IN
IN
MODE
WAKE1
MODE
WAKE2
SOFT-START
SOFT-START
V
V
C
C
CLAMP
CLAMP
–
V
1.20V
1.20V - 9%
TSD
–
REF_GD
ERROR
AMPLIFIER
ERROR
AMPLIFIER
I
COMP
I
COMP
–
+
–
+
ZERO
ZERO
V
V
LTC3527/LTC3527-1
OUT
OUT
EXPOSED
PAD/
PGND
1.20V
1.20V
V
V
OUT2
OUT1
GND
FB1
FB2
14
17
11
5
2
8
R1
R2
R3
R4
V
1.6V TO 5.25V
V
1.6V TO 5.25V
OUT1
OUT2
C
4.7µF
C
4.7µF
OUT1
OUT2
35271f
9