LTC1435CS#PBF Linear Technology, LTC1435CS#PBF Datasheet - Page 18

• Manufacturer Part Number: LTC1435CS#PBF
• Description: IC SW REG SYNC STEP-DOWN 16-SOIC
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1435CS#PBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.19 ~ 9 V
• Current - Output: 50mA
• Frequency - Switching: 125kHz
• Voltage - Input: 3.5 ~ 30 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

LTC1435
18
TYPICAL APPLICATIONS
SHDN
GND
V
E1
E3
E3
IN
R5
1k
1
2
3
4
SENSE
I
GND
NIN
OUT
+
GND
C14
1000pF
LT1620
E5
0.01 F
C17
U2
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%
PROG
R6
Constant-Current/Constant-Voltage High Efficiency Battery Charger
R7
1.5M
100pF
C10
100pF
*CONSULT CAPACITOR MANUFACTURER FOR RECOMMENDED
U
ESR RATING FOR CONTINUOUS 4A OPERATION
C9
C18
0.1 F
100
95
90
85
80
75
1
2
3
4
5
6
7
8
0
C11
56pF
I
V
C
RUN/SS
I
SFB
SGND
V
SENSE
SENSE
Current Programming Equation
BATT
TH
IN
OSC
OSENSE
= 24V
LTC1435
BATTERY CHARGE CURRENT (A)
1
U1
–
+
=
EXTV
INTV
BOOST
PGND
(I
SW
V
TG
BG
CC
CC
C4
0.1 F
IN
PROG
Efficiency
2
16
15
14
13
12
11
10
9
10(R1)
)(R6) – 0.04
V
V
V
3
BATT
BATT
D2
BATT
+
= 16V
= 12V
= 6V
0.33 F
JP1A
R3
105k
0.1%
C6
4
C7
4.7 F
16V
1435 TA05
0.1 F
C5
D1
5
JP1B
R4
76.8k
0.1%
Q1
Si4412DY
Q2
Si4412DY
100pF
27 H
0.1%
C8
R2
1M
L1
0.025
R1
+
DC133 F01
C3
22 F
35V
E6
BATT
E7
GND