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參數(shù)資料
| 型號： | ADP1610 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 1.2 MHz DC-DC Step-Up Switching Converter |
| 中文描述： | 1.2兆赫的DC - DC升壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 948K |
| 代理商： | ADP1610 |
ADP1610
Table 7. Recommended External Components for Popular Input/Output Voltage Conditions
V
IN
(V)
V
OUT
(V)
f
SW
(MHz)
L (μH)
C
OUT
(μF)
3.3
5
0.700
4.7
10
5
1.23
2.7
10
9
0.700
10
10
9
1.23
4.7
10
12
0.700
10
10
12
1.23
4.7
10
5
9
0.700
10
10
9
1.23
4.7
10
12
0.700
10
10
12
1.23
4.7
10
Rev. 0 | Page 13 of 16
C
IN
(μF)
10
10
10
10
10
10
10
10
10
10
R
1
(k)
30.9
30.9
63.4
63.4
88.7
88.7
63.4
63.4
88.7
88.7
R
2
(k)
10
10
10
10
10
10
10
10
10
10
R
Comp
(k)
50
90.9
71.5
150
130
280
84.5
178
140
300
C
comp
(pF)
520
150
820
180
420
100
390
100
220
100
I
OUT_MAX
(mA)
600
600
350
350
250
250
450
450
350
350
REF
COMP
1
FB
C2
CC
RC
ERROR AMP
2
0
g
m
Figure 26. Compensation Components
The capacitor, C2, is chosen to cancel the zero introduced by
output capacitance ESR.
Solving for C2,
COMP
OUT
R
C
ESR
C2
×
=
(19)
For low ESR output capacitance such as with a ceramic capaci-
tor, C2 is optional. For optimal transient performance, the R
COMP
and C
COMP
might need to be adjusted by observing the load
transient response of the ADP1610. For most applications, the
compensation resistor should be in the range of 30 k to
400 k, and the compensation capacitor should be in the range
of 100 pF to 1.2 nF. Table 7 shows external component values
for several applications.
SOFT START CAPACITOR
The voltage at SS ramps up slowly by charging the soft start
capacitor (C
SS
) with an internal 3 μA current source. Table 8
listed the values for the soft start period, based on maximum
output current and maximum switching frequency.
The soft start capacitor limits the rate of voltage rise on the
COMP pin, which in turn limits the peak switch current at
startup. Table 8 shows a typical soft start period, t
SS
, at
maximum output current, I
OUT_MAX
, for several conditions.
A 20 nF soft start capacitor results in negligible input current
overshoot at startup, and so is suitable for most applications.
However, if an unusually large output capacitor is used, a longer
soft start period is required to prevent input inrush current.
Table 8. Typical Soft Start Period
V
IN
(V)
V
OUT
(V)
3.3
5
5
9
9
12
12
5
9
9
12
12
C
OUT
(μF)
10
10
10
10
10
10
10
10
10
10
C
SS
(nF)
20
100
20
100
20
100
20
100
20
100
t
SS
(ms)
0.3
2
2.5
8.2
3.5
15
0.4
1.5
0.62
2
Conversely, if fast startup is a requirement, the soft start
capacitor can be reduced or even removed, allowing the
ADP1610 to start quickly, but allowing greater peak switch
current (see Figure 22 to Figure 25)
.
APPLICATION CIRCUITS
The circuit in Figure 27 shows the ADP1610 in a step-up
configuration. The ADP1610 is used here to generate a 10 V
regulator with the following specifications: V
IN
= 2.5 V to 5.5 V,
V
OUT
= 10 V, and I
OUT
≤ 400 mA.
IN
SD
SS
RT
SW
ON
FB
COMP
C
SS
22nF
GND
L
4.7
μ
H
D1
ADP1610
5
6
3
2
7
8
1
4
C
IN
10
μ
F
C
150pF
R
220k
C
OUT
10
F
R1
71.3k
R2
10k
0
3.3V
10V
Figure 27. 3.3 V to 10 V Step-Up Regulator
The output can be set to the desired voltage using Equation 2.
Use Equation 16 and 17 to change the compensation network.
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|---|---|
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| ADP1610-BL1-EVZ | 制造商:Analog Devices 功能描述:Evaluation Board For Step-Up DC-DC Converter 制造商:Analog Devices 功能描述:BLANK ADISIMPOWER EVAL ADP1610 - Boxed Product (Development Kits) |
| ADP1610-EVALZ | 功能描述:BOARD EVALUATION FOR ADP1610 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:DC/DC，步降 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:3.3V 電流 - 輸出:3A 輸入電壓:4.5 V ~ 28 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):降壓 頻率 - 開關(guān):250kHz 板類型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名稱:497-12113STEVAL-ISA094V1-ND |
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