AAT1149 Datasheet, PDF (18/20 Pages) Advanced Analogic Technologies – 3MHz Fast Transient 400mA Step-Down Converter

AAT1149
3MHz Fast Transient
400mA Step-Down Converter
Adjustable Version
(0.6V device)
V_OUT (V)
1.0
1.2
1.5
1.8
2.5
3.3
R2 = 59kΩ
R2 = 221kΩ¹
R1 (kΩ)
39.2
59.0
88.7
118
187
267
R1 (kΩ)
150
221
332
442
715
1000
Table 3: Evaluation Board Component Values.
L1 (μH)
1.0
1.2
1.5
1.8
2.2
3.3
Manufacturer
Taiyo Yuden
Sumida
Murata
Coiltronics
Part Number/
Type
BRC1608
BRL2012
CBC2518
Wire Wound Chip
CDRH2D09
Shielded
LQH2MCN4R7M02
Unshielded
SD3118
Shielded
Inductance
(μH)
0.77
1.0
1.5
1.5
2.2
3.3
1.0
2.2
1.2
1.5
1.8
2.5
3.0
1.0
1.5
2.2
3.3
0.68
0.82
1.2
1.5
2.2
3.3
Rated
Current (mA)
660
520
410
600
550
450
1000
890
590
520
480
440
400
485
445
425
375
980
830
720
630
510
430
DCR
(Ω)
110
180
300
200
250
350
80
130
97.5
110
131
150
195
300
400
480
600
31
54
75
104
116
139
Table 4: Typical Surface Mount Inductors.
Size (mm)
LxWxH
0603
(H_MAX = 1mm)
0805
(H_MAX = 1mm)
2.5x1.8x1.8
3.2x3.2x1.0
2.0x1.6x0.95
3.15x3.15x1.2
1. For reduced quiescent current, R2 = 221kΩ.
18
1149.2006.11.1.0