參數(shù)資料
型號(hào)： RT9205AGS
廠商： Richtek Technology Corporation
英文描述： Dual Regulators - Synchronous Buck PWM DC-DC and Linear Controller
中文描述： 雙穩(wěn)壓器-同步降壓PWM型DC - DC和線性控制器
文件頁(yè)數(shù)： 11/15頁(yè)
文件大?。?/td> 227K
代理商： RT9205AGS
RT9205/A
Preliminary
11
DS9205/A-08 March 2007
www.richtek.com
Inductor Selection
The RT9205/A was designed for V
IN
= 5V, step-down
application mainly. Figure 6 shows the typical topology
and waveforms of step-down converter.
The ripple current of inductor can be calculated as follows:
Because operation frequency is fixed at 300kHz,
The V
OUT
ripple is
ESR is the equivalent series resistor of output capacitor
Table 1 shows the ripple voltage of V
OUT
at VIN = 5V
Table 1
Figure 5
Figure 6
*Refer to Sanyo low ESR series (CE, DX, PX.....)
The suggested L and C are as follows:
2
μ
H with
≥
1500
μ
F C
OUT
5
μ
H with
≥
1000
μ
F C
OUT
0A
0V
2V
4V
I
S
I
T1
T2
T3
TIME
COUNT = 1
COUNT = 2
COUNT = 3
OVERLOAD
APPLIED
T0
I
D
i
D
i
Q
I
Q
uQ
uI
L
i
L
I
L
= I
O
V
L
V
I
- V
O
- V
O
T
S
T
ON
T
OFF
V
I
V
O
R
C
D
L
Q
C.C.M.
V
OUT
3.3V
2.5V
1.5V
Inductor
1000
μ
F (ESR=53m
)
1500
μ
F (ESR=33m
)
3000
μ
F (ESR=21m
)
2
μ
H
100mV
62mV
40mV
5
μ
H
40mV
25mV
16mV
2
μ
H
110mV
68mV
43mV
5
μ
H
44mV
28mV
18mV
2
μ
H
93mV
58mV
37mV
5
μ
H
37mV
23mV
15mV
×
OUT
RIPPLE
ON
(5V - V
)
IL
=
T
L
×
OUT
ON
V
T
= 3.33
5V
ESR
OUT RIPPLE
RIPPLE
V
= IL
相關(guān)PDF資料
PDF描述
RT9205APS Dual Regulators - Synchronous Buck PWM DC-DC and Linear Controller
RT9205GS Dual Regulators - Synchronous Buck PWM DC-DC and Linear Controller
RT9205PS Dual Regulators - Synchronous Buck PWM DC-DC and Linear Controller
RT9206GS High Efficiency, Synchronous Buck with Dual Linear Controllers
RT9206PS High Efficiency, Synchronous Buck with Dual Linear Controllers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
RT9205APS 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Dual Regulators - Synchronous Buck PWM DC-DC and Linear Controller
RT9205GS 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Dual Regulators - Synchronous Buck PWM DC-DC and Linear Controller
RT9205PS 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Dual Regulators - Synchronous Buck PWM DC-DC and Linear Controller
RT9206 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:High Efficiency, Synchronous Buck with Dual Linear Controllers
RT9206GS 功能描述:IC REG TRPL BCK/LINEAR 16SOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 + 切換式 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 拓?fù)?降壓（降壓）同步（3），線性（LDO）（2） 功能:任何功能 輸出數(shù):5 頻率 - 開關(guān):300kHz 電壓/電流 - 輸出 1:控制器 電壓/電流 - 輸出 2:控制器 電壓/電流 - 輸出 3:控制器 帶 LED 驅(qū)動(dòng)器:無(wú) 帶監(jiān)控器:無(wú) 帶序列發(fā)生器:是 電源電壓:5.6 V ~ 24 V 工作溫度:-40°C ~ 85°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:*
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