LTC1871-1_15 Datasheet, PDF (31/36 Pages) Linear Technology – Wide Input Range, No RSENSE Current Mode Boost, Flyback and SEPIC Controller

LTC1871-1
TYPICAL APPLICATIONS
2.5V to 3.3V Input, 5V/2A Output Boost Converter
R_C
22k
C_C1
R1
6.8nF 12.1k
R2 ^1%
C_{C2 37.4k}
47pF
1%
R_T
80.6k
1%
1
RUN
2
I_TH
10
SENSE
9
V_IN
LTC1871-1
3
FB
4
FREQ
8
INTV_CC
7
GATE
5
6
MODE/SYNC GND
L1
1.8μH
D1
+
M1
C_{VCC + CIN}
4.7μF
47μF
X5R
6.3V
C_IN: SANYO POSCAP 6TPA47M
C_OUT1: SANYO POSCAP 6TPB150M
C_OUT2: TAIYO YUDEN JMK316BJ106ML
C_VCC: TAIYO YUDEN LMK316BJ475ML
D1: INTERNATIONAL RECTIFIER 30BQ015
L1: TOKO DS104C2 B952AS-1R8N
M1: SILICONIX/VISHAY Si9426
V_IN
2.5V to 3.3V
C_OUT1
150μF
6.3V
×2
V_OUT
5V
2A
C_OUT2
10μF
6.3V
X5R
×2
GND
18711 TA01a
Output Efficiency at 2.5V and 3.3V Input
100
95
90
85
80
75
70
65
60
55
50
0.001
0.01
0.1
1
OUTPUT CURRENT (A)
10
18711 TA01b
18711fb
31