ER3110DI Datasheet, PDF (4/23 Pages) Altera Corporation – Synchronous Buck Regulator

Page 4
Typical Application Schematics
CBOOT
100nF
COUT
10µF
VOUT
L1
22µH
CPVIN
10µF
1 _SS
2
SYNC
3 _BOOT
4 _PVIN
5 _SW
6
PGND
GND
FSW ¹²
11
COMP
10
FB
R2
C_FB
9
AVINO
POK
R3
CAVINO
1µF
EN
FIGURE 3. INTERNAL DEFAULT PARAMETER SELECTION
CSS
CBOOT
100nF
COUT
10µF
VOUT
L1
22µH
CPVIN
10µF
1 _SS
2
SYNC
3 _BOOT
4 _PVIN
5 _SW
6
PGND
GND
FSW ¹²
RFSW
11
COMP
10
FB
R2
CFB
9
AVINO
POK
EN
CAVINO
1µF
R3
RCOMP
CCOMP
V_OUT
L₁
C_OUT
(V)
(µH)
(µF)
12
22
2 x 22
5
22
47 + 22
3.3
22
47 + 22
2.5
22
47 + 22
1.8
12
47 + 22
NOTE:
3. Connect FSW to V_AVINO
FIGURE 4. USER PROGRAMMABLE PARAMETER SELECTION
TABLE 1. EXTERNAL COMPONENT SELECTION
R₂
R₃
C_FB
R_FSW
(kΩ)
(kΩ)
(pF)
(kΩ)
90.9
4.75
22
115
90.9
12.4
27
DNP (Note 3)
90.9
20
27
DNP (Note 3)
90.9
28.7
27
DNP (Note 3)
90.9
45.5
27
DNP (Note 3)
R_COMP
(kΩ)
150
100
100
100
70
C_COMP
(pF)
470
470
470
470
470
Enpirion Power Datasheet ER3110DI Wide PVIN 1A Synchronous Buck Regulator
10038
May 28, 2014
May 2014 Altera Corporation
Rev A