AAT2687 Datasheet, PDF (15/20 Pages) Advanced Analogic Technologies – PMIC Solution for 24V Systems with 2 High Performance Step-Down Converters

DATA SHEET
AAT2687
PMIC Solution for 24V Systems
with 2 High Performance Step-Down Converters
C3
0.1μF
U1
1 _LX1
LX1 ²⁴
2 _LX1
LX1 ²³
V_IN1
6.0V - 24.0V
C1 ₊
220μF
25V
C15
open
5 _BST
N/C ²⁰
J1
2
D1
1 _BAS16
18 _VL1
FB1 ¹⁶
19 _VL1
RS1 ¹³
AAT2687
22 _IN1
OS1 ¹⁴
EP
C14
3 _N/C ^{COMP1 15}
2.2μF
4 _N/C
OUT2 ¹¹
3
2
1
EN1
C13
V_IN2
1μF
25V
C2
2.2μF
6 _EN1
N/C ¹²
10 _IN2
GND ¹⁷
9 _{N/C GND2} 7
3
2 8 _EN2
N/C ²¹
1
EN2
TQFN45-24
L1
4.7μH 5.3A
R2
C4
C10
2.2nF
D2 ^2k
220nF
R5
R6
453
open
R3
8.87k
V_OUT1
3.3V /4.5A
R7
2k
V_OUT2
1.8V/0.6A
C6
150pF
R1
3.92K
C7
22μF
R4
1.96k
C8 C9
22μF 22μF
C5
2.2nF
C12
2.2μF
C11
open
R8
165k
U1
C1
C2, C12, C14
C3
C4
C5, C6, C10
C7, C8, C9
C13
D1
D2
L1
R1 - R5
AAT2687 Skyworks, Hi-Voltage Buck/LDO, TQFN45-24
Cap, MLC, 220μF/25V, Electrolytic cap
Cap, MLC, 2.2μF, 6.3V, 0805
Cap, MLC, 0.1μF/6.3V, 0603
Cap, MLC, 220nF/6.3V, 0402
Cap, MLC, misc, 0603
Cap, MLC, 22μF/10V, 1206
Cap, MLC, 1μF, 25V, 0805
BAS16, Generic, Rectifier, 0.2A/85V, Ultrafast, SOT23
B540C, Generic, Schottky Rectifier, 5A/40V, SMC
RCH108NP-4R7M, Sumida, 4.7μH, I_SAT = 5.7A, DCR = 11.7mΩ
or Wurth 744 771 004, 4.7μH, I_SAT = 6.8A, DCR = 11mΩ
Carbon film resistor, 0402
Figure 4: AAT2687IFK Evaluation Board Schematic For V_IN = 6V - 24V and V_OUT = 3.3V.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
202033A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 8, 2012
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