參數(shù)資料
型號(hào)： LTM4600EV
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 10A High Effi ciency DC/DC レModule
中文描述： 17 A SWITCHING REGULATOR, 800 kHz SWITCHING FREQ-MAX, BGA104
封裝： 15 X 15 MM, 2.8 MM HEIGHT, ROHS COMPLIANT, MO-222, LGA-104
文件頁數(shù)： 18/24頁
文件大?。?/td> 370K
代理商： LTM4600EV
LTM4600
18
4600fa
inductor ripple current gets too high above 16V, and the
400ns minimum off-time is limited below 9V.
Equations for setting frequency:
I
ON
= V
IN
– 0.7V/110k; for 5V input, I
ON
= 39μA
frequency = (I
ON
/[2.4V 10pF]) DC; DC = duty cycle,
duty cycle is (V
OUT
/V
IN
)
t = t
ON
+ t
OFF
, t
ON
= on-time, t
OFF
= off-time of the
switching period; t = 1/frequency
t
OFF
must be greater than 400ns, or t – t
ON
> 400ns.
t
ON
= DC t
~450kHz frequency or 2.22μs period is chosen for 5V to
3.3V. Frequency range is about 450kHz to 650kHz from
4.5V to 7V input.
t
ON
= 0.66 2.22μs
1.46ns
t
OFF
= 2μs – 1.32ns
760ns
t
ON
and t
OFF
are above the minimums with adquate guard
band.
Using the frequency = (I
ON
/[2.4V 10pF]) DC, solve for
I
ON
= (450kHz 2.4V 10pF) (1/0.66)
16μA. I
ON
current
calculated from 5V input was 39μA, so a resistor from f
ADJ
to ground = (0.7V/30.1k) = 23μA. 39μA – 23μA = 16μA,
sets the adequate I
ON
current for proper frequency range
for the higher duty cycle conversion of 5V to 3.3V. Input
voltage range is limited to 4.5V to 7V. Higher input voltages
can be used without the 30.1k on f
ADJ
. The inductor ripple
current gets too high above 7V, and the 400ns minimum
off-time is limited below 4.5V.
APPLICATIU
W
U
U
4600 F18
R2
22.1k
1%
R1
30.1k
EXTV
CC
RUN/SS
COMP
FCB
V
OUT
5V TO 3.3V AT 8A WITH f
ADJ
= 30.1k
C1, C3: TDK C3216X5R1E106MT
C2: TAIYO YUDEN, JMK316BJ226ML
C4: SANYO POS CAP, 6TPE330MIL
PGOOD
V
OSET
SV
IN
PGND
SGND
4.5V TO 7V
3.3V AT 8A
C1
10
μ
F
25V
C3
10
μ
F
25V
C4
330
μ
F
6.3V
C2
22
μ
F
C5
100pF
V
IN
LTM4600EV
f
ADJ
RUN/SOFT-START
OPEN DRAIN
EFFICIENCY = 93%
+
4600 F19
R2
13.7k
1%
R1
15k
EXTV
CC
RUN/SS
COMP
FCB
V
OUT
12V TO 5V AT 8A WITH f
ADJ
= 15k
C1, C3: TDK C3216X5R1E106MT
C2: TAIYO YUDEN, JMK316BJ226ML
C4: SANYO POS CAP, 6TPE330MIL
PGOOD
V
OSET
SV
IN
PGND
SGND
9V TO 16V
5V AT 8A
EFFICIENCY = 93%
+
C1
10
μ
F
25V
C3
10
μ
F
25V
C4
330
μ
F
6.3V
C2
22
μ
F
C5
100pF
V
IN
LTM4600EV
f
ADJ
RUN/SOFT-START
OPEN DRAIN
5V to 3.3V at 8A
12V to 5V at 8A
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LTM4600EV#PBF 功能描述:IC DC/DC UMODULE 10A 104-LGA RoHS:是 類別:電源 - 板載 >> DC DC Converters 系列:µModule® 設(shè)計(jì)資源:VI-200, VI-J00 Design Guide, Appl Manual 標(biāo)準(zhǔn)包裝:1 系列:* 類型:隔離 輸出數(shù):1 電壓 - 輸入（最?。?66V 電壓 - 輸入（最大）:160V Voltage - Output 1:12V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:* 電源（瓦） - 制造商系列:50W 電壓 - 隔離:* 特點(diǎn):* 安裝類型:通孔 封裝/外殼:9-FinMod 尺寸/尺寸:4.60" L x 1.86" W x 0.79" H（116.8mm x 47.2mm x 20.1mm） 包裝:散裝 工作溫度:-25°C ~ 85°C 效率:* 電源（瓦特）- 最大:*
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