LT3782 Linear Technology, LT3782 Datasheet - Page 6

• Manufacturer Part Number: LT3782
• Description: 2-Phase Step-Up DC/DC Controller
• Manufacturer: Linear Technology

BLOCK DIAGRA
LT3782
V
20µF
6
IN
C
IN
R
FREQ
R6
R8
SLOPE
SYNC
R
RUN
GND
V
SET
CC
27
17
10
11
5
4
SGATE1
20pF
C5
BGATE1
SET
REGULATOR
SLOPE
COMP
+
OSC
2.44V
0.5V
DELAY
+
+
CK
D
V
+
–
+
–
GBIAS
Q
Q
W
A5
= V
A7
SET
CC
– 1V AND CLAMPED AT 11V
S
CH1
LOW POWER
SHUTDOWN
R
LOGIC
DCL
7
S
CH2
R
A10
A3
2.5V
PWM1
PWM2
+
CL1
CL2
BGATE1
7V
+
2.5V
+
+
–
SLOPE COMP
+
–
+
–
SLOPE COMP
+
–
+
–
+
–
+
BGATE2
A4
A12
CH1
CH2
A11
R3
60mV
R4
60mV
V
C
15
A20
R5
2k
A6
C1
2000pF
A13
A18
+
–
GM
A1
A8
A16
–
+
BLANKING
BLANKING
V
A15
CC
SS
D4
– 2.5V
A14
A19
+
–
14
ONE SHOT
ONE SHOT
+
GBIAS1
DELAY
GBIAS2
C7
10nF
10µA
D6
D7
I1
A9
A2
A17
V
4V
REF
R1
50k
R2
50k
22
21
28
22
24
20
13
12
19
16
2
6
8
9
1
GBIAS1
GBIAS2
GBIAS
SGATE1
DELAY
BGATE1
SENSE1
SENSE1
V
SGATE2
BGATE2
SENSE2
SENSE2
V
FB
EE1
EE2
NOTE:
PACKAGE BOTTOM METAL PLATE (PIN 29)
IS FUSED TO CHIP DIE AGND
15µ
L1
+
–
+
–
R
SET
15µ
R7
10Ω
L2
C2
2nF
C3
2µF
R9
10Ω
C4
2nF
M1
R
S1
D1
M2
R
D2
S2
R
R
F1
F2
3782 BD
+
3782fa
C
100µF
OUT
V
OUT