LTC1435A Linear Technology, LTC1435A Datasheet - Page 18

• Manufacturer Part Number: LTC1435A
• Description: High Efficiency Low Noise Synchronous Step-Down Switching Regulator
• Manufacturer: Linear Technology

LTC1435A
18
TYPICAL APPLICATIONS
SHDN
GND
V
E1
E3
E3
IN
R5
1k
1
2
3
4
SENSE
I
GND
NIN
OUT
+
GND
E5
C14
1000pF
LT1620
0.01 F
C17
C1*
22 F
35V
0.033 F
PROG
C13
AVG
V
PIN
R
CC
+
PROG
8
7
6
5
C2*
22 F
35V
0.1 F
C12
0.1 F
C15
0.33 F
E4
I
C16
10k
1%
R6
PROG
Constant-Current/Constant-Voltage High Efficiency Battery Charger
R7
1.5M
U
100pF
C10
100pF
*CONSULT CAPACITOR MANUFACTURER FOR RECOMMENDED
ESR RATING FOR CONTINUOUS 4A OPERATION
C9
C18
0.1 F
100
I
95
90
85
80
75
1
2
3
4
5
6
7
8
Current Programming Equation
BATT
0
C11
56pF
C
RUN/SS
I
SFB
SGND
V
SENSE
SENSE
TH
V
OSC
OSENSE
IN
LTC1435A
= 24V
=
BATTERY CHARGE CURRENT (A)
–
+
1
EXTV
INTV
BOOST
(I
PGND
SW
PROG
V
Efficiency
TG
BG
CC
CC
C4
0.1 F
IN
2
16
15
14
13
12
11
10
9
10(R1)
)(R6) – 0.04
D2
V
V
V
3
BATT
BATT
BATT
+
0.33 F
= 16V
= 12V
JP1A
R3
105k
0.1%
= 6V
C6
C7
4.7 F
16V
4
1435A TA05
0.1 F
C5
D1
R4
76.8k
0.1%
JP1B
5
Q1
Si4412DY
Q2
Si4412DY
100pF
27 H
0.1%
R2
1M
L1
C8
0.025
R1
1435A TA06
+
C3
22 F
35V
E6
BATT
E7
GND