參數(shù)資料
型號(hào): AAT2506IWP-AI-T1
廠商: Advanced Analog Technology,lnc.
英文描述: 1MHz Step-Down Converter/LDO Regulator
中文描述: 1MHz的降壓轉(zhuǎn)換器/ LDO穩(wěn)壓器
文件頁(yè)數(shù): 21/26頁(yè)
文件大小: 697K
代理商: AAT2506IWP-AI-T1
Input Capacitor
Input Ripple V
PP
= 25mV
AAT2506 Losses
T
J(MAX)
= T
AMB
+
Θ
JA
· P
LOSS
= 85
°
C + (50
°
C/W) · 392mW = 105
°
C
P
TOTAL
+ (t
sw
· F · I
OBUCK
+ I
QBUCK
+ I
QLDO
) · V
IN
+ (V
IN
- V
LDO
) · I
LDO
I
OBUCK
2
· (R
DSON(HS)
· V
OBUCK
+ R
DSON(LS)
· [V
IN
- V
OBUCK
]
)
V
IN
=
=
+ (5ns · 1.0MHz · 0.4A + 50
μ
A +125
μ
A) · 4.2V + (4.2V - 3.3V) · 0.3A = 392mW
0.4
2
· (0.725
Ω
·
1.8V + 0.7
Ω
·
[4.2V - 1.8V])
4.2V
I
OBUCK
2
RMS
I
P = esr
·
I
RMS
2
= 5m
Ω
·
(0.2A)
2
= 0.2mW
=
= 0.2Arms
C
IN
=
=
= 4.75
μ
F
1
- ESR
·
4
·
F
S
I
OBUCK
V
PP
1
- 5m
Ω
·
4
·
1MHz
0.4A
25mV
AAT2506
1MHz Step-Down Converter/LDO Regulator
2506.2006.05.1.3
21
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參數(shù)描述
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