AME5286 Datasheet, PDF (11/20 Pages) Analog Microelectronics – Rectified Step-Down Converter

AME
AME5286
n Typical Operating Circuit
3A, 300KHz ~ 2MHz Synchronous
Rectified Step-Down Converter
VIN
2.5V to 5V
CIN
10µF
R4
100KΩ
Chip Enable
C₁
C₂
Optional
R3
4
IN
L
SW ⁵
8
PGOOD
FB ⁷
3
AME5286
6
EN
FREQ
R_FREQ
1 _COMP
GND ^{9 (Exposed pad)}
SS ²
Css
V OUT
R₁
C_OUT
R2
V_OUT(V)
3.3
2.5
1.8
1.5
1.2
1
C_IN(^µF)
10
10
10
10
10
10
R1(K^Ω
75
51
30
21
12
6
R2(K^Ω
24
24
24
24
24
24
R3(K^Ω
25
20
15
13
11
8.2
C1 pF
680
680
680
680
680
680
L(^µH)
2.2
2.2
1.5
1.5
1.5
1.5
Table 1. Recommended Components Selectin for fsw = 2MHz
C_OUT ^µF
22
22
22
22
22
22
Rev. A.02
The ground area must provide adequate heat
dissipating area to the thermal pad and using
multiple vias to help thermal dissipati.on
R3
C1
GND
Css
COMP 1
SS 2
EN 3
GND
GND
9
8 PG
7 FB
6 FREQ
Place the feedback
R2 ^{resistors as close to}
the IC as possible
R1
V_OUT
RFREQ
GND
C_IN must be
placed
between V IN
and GND as
close as
possible
VIN 4
5 SW
CIN
L1
COUT
GND
Place the input and output
capacitors as close to the IC as
possible
V_OUT
SW should be
connected to inductor
by wide and short
trace , and keep
sensitive components
away from this trace
Figure 3. AME5286 Regulators Layout Diagram
11