LTC1871EMS#TRPBF Linear Technology, LTC1871EMS#TRPBF Datasheet - Page 32

• Manufacturer Part Number: LTC1871EMS#TRPBF
• Description: IC CONTRLR CURRENT MODE 10-MSOP
• Manufacturer: Linear Technology
• Type: Step-Up (Boost), Flyback, Sepicr

Specifications of LTC1871EMS#TRPBF

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.23 ~ 72 V
• Current - Output: 50mA
• Frequency - Switching: 50kHz ~ 1MHz
• Voltage - Input: 2.5 ~ 36 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Number Of Pwm Outputs: 1
• On/off Pin: No
• Adjustable Output: No
• Topology: Boost/Buck/Flyback
• Switching Freq: 50 TO 1000kHz
• Duty Cycle: 97%
• Operating Supply Voltage (max): 36V
• Synchronous Pin: Yes
• Rise Time: 17ns
• Fall Time: 8ns
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 10
• Package Type: MSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Compliant

LTC1871
TYPICAL APPLICATIONS
32
R
22k
C
C
6.8nF
C3
261k
18V to 27V Input, 28V Output, 400W 2-Phase, Low Ripple, Synchronized RF Base Station Power Supply (Boost)
1%
R4
C
47pF
C2
C
100pF
C
C
C
C
C
C2
IN1
IN2, 3
OUT2, 4, 5
OUT1, 3, 6
VCC1, 2
8.45k
1%
:
R2
54.9k
C
47pF
1%
R2
R3
12.1k
1%
C1
:
47pF
R
22k
C
:
1.10k
FB2
C
C
6.8nF
: SANYO 50MV330AX
: TAIYO YUDEN GMK325BJ225MN
1%
C1
R3
93.1k
C
47pF
SANYO 50MV330AX
TAIYO YUDEN GMK325BJ225MN
TAIYO YUDEN LMK316BJ475ML
1%
FB1
R1
NOTE:
127Ω
127k
1. V
1%
1%
R1
R4
5V to 12V Input, ±12V/0.2A Output SEPIC Converter with Undervoltage Lockout
V
IN
IN
R
150k
5%
R
150k
5%
UVLO
UVLO
T1
T2
R
60.4k
1%
+
–
T
1
2
3
4
5
1
2
3
4
5
= 4.47V
= 4.14V
RUN
I
FB
FREQ
MODE/SYNC
RUN
I
FB
FREQ
MODE/SYNC
TH
TH
1
2
3
4
5
RUN
I
FB
FREQ
MODE/SYNC
EXT CLOCK
INPUT (200kHz)
TH
LTC1871
LTC1871
LTC1871
D1, D2:
L1 TO L3: COILTRONICS VP1-0076 (*COUPLED INDUCTORS)
M1:
INTV
INTV
SENSE
SENSE
GATE
GATE
GND
GND
L1 TO L4: SUMIDA CEP125-5R6MC-HD
L5:
D1, D2:
M1, M2: INTERNATIONAL RECTIFIER IRLZ44NS
V
V
INTV
SENSE
CC
CC
IN
IN
GATE
GND
V
CC
IN
MBS120T3
SILICONIX/VISHAY Si4840
10
9
8
7
6
10
9
8
7
6
10
9
8
7
6
SUMIDA CEP125-0R3NC-ND
ON SEMICONDUCTOR MBR2045CT
C
4.7μF
X5R
C
4.7μF
X5R
VCC1
VCC2
C
4.7μF
10V
X5R
VCC
C
2.2μF
35V
X5R
C
2.2μF
35V
X5R
IN2
IN3
C
1μF
16V
X5R
IN1
L1
5.6μH
L3
5.6μH
+
M1
M2
R
0.007Ω
1W
R
0.007Ω
1W
L2
5.6μH
L4
5.6μH
C
47μF
16V
AVX
S1
S2
D1
D2
IN2
L1*
C
2.2μF
35V
X5R
×3
OUT3
4.7μF
•
C
M1
C
2.2μF
35V
X5R
×3
X5R
16V
R
0.02Ω
DC2
OUT1
S
4.7μF
C
+
16V
X5R
DC1
+
C
330μF
50V
OUT4
C
330μF
50V
OUT2
•
L2*
D1
D2
L3*
C
OUT5
330μF
0.3μH
L5*
50V
•
×4
*
+
C
4.7μF
16V
X5R
×3
C
4.7μF
16V
X5R
×3
1871 TA03
OUT2
OUT1
+
C
330μF
50V
1871 TA04
*L5, C
C
OPTIONAL SECONDARY
FILTER TO REDUCE
OUTPUT RIPPLE FROM
<500mV
IN1
OUT6
GND
V
–12V
0.4A
V
5V to 12V
V
12V
0.4A
OUT2
IN
OUT1
C
2.2μF
35V
X5R
OUT6
OUT5
ARE AN
P-P
GND
V
28V
14A
V
18V to 27V
OUT
IN
*
AND
TO <100mV
1871fe
P-P