LTC1871 Linear Technology, LTC1871 Datasheet - Page 36

• Manufacturer Part Number: LTC1871
• Description: Wide Input Range/ No RSENSE Current Mode Boost/ Flyback and SEPIC Controller
• Manufacturer: Linear Technology

TYPICAL APPLICATIO S
RELATED PARTS
PART NUMBER
LT
LTC1624
LTC1700
LTC1872
LT1930
LT1931
LTC3401/LTC3402
LTC1871
36
®
1619
100pF
C
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone]
C2
49.9k
1nF
1%
C
R1
R
R
82k
C
C
1nF
C1
DESCRIPTION
Current Mode PWM Controller
Current Mode DC/DC Controller
No R
SOT-23 Boost Controller
1.2MHz, SOT-23 Boost Converter
Inverting 1.2MHz, SOT-23 Converter
1A/2A 3MHz Synchronous Boost Converters
*COILTRONICS VP5-0155
(PRIMARY = 3 WINDINGS IN PARALLEL)
R
120k
T
SENSE
RUN
I
FB
FREQ
MODE/SYNC
TH
Synchronous Step-Up Controller
f = 200kHz
LTC1871
150k
1%
R2
U
INTV
High Power SLIC Supply with Undervoltage Lockout
SENSE
GATE
GND
V
www.linear.com
CC
IN
+
C1
4.7 F
X5R
+
C
220 F
16V
TPS
IN
7V TO 12V
0.1 F
10k
V
IN
C8
IRL2910
R
0.012
S
1, 2, 3
COMMENTS
300kHz Fixed Frequency, Boost, SEPIC, Flyback Topology
SO-8; 300kHz Operating Frequency; Buck, Boost, SEPIC Design;
V
Up to 95% Efficiency, Operation as Low as 0.9V Input
Delivers Up to 5A, 550kHz Fixed Frequency, Current Mode
Up to 34V Output, 2.6V V
Positive-to-Negative DC/DC Conversion, Miniature Design
Up to 97% Efficiency, Very Small Solution, 0.5V V
T1*
IN
4.7 F
X5R
•
50V
1
C2
Up to 36V
LT1783
•
4
•
5
•
6
6
2
10BQ060
10BQ060
10BQ060
R
10k
1%
+
F1
–
D2
D3
D4
4
3
+
+
+
1871 TA06
sn1871 1871fs LT/TP 1001 2K • PRINTED IN USA
196k
R
1%
IN
F2
C3
10 F
25V
X5R
C4
10 F
25V
X5R
C5
10 F
25V
X5R
LINEAR TECHNOLOGY CORPORATION 2001
16V, Miniature Design
+
C
3.3 F
100V
OUT
GND
V
–24V
200mA
V
–72V
200mA
IN
OUT1
OUT2
5V