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參數資料
| 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升壓轉換器 |
| 文件頁數： | 14/16頁 |
| 文件大小： | 948K |
| 代理商： | ADP1610 |
ADP1610
DC-DC STEP-UP SWITCHING CONVERTER WITH
TRUE SHUTDOWN
Some battery-powered applications require very low standby
current. The ADP1610 typically consumes 10 nA from the
input, which makes it suitable for these applications. However,
the output is connected to the input through the inductor and
the rectifying diode, allowing load current draw from the input
while shut down. The circuit in Figure 28 enables the ADP1610
to achieve output load disconnect at shutdown. To shut down
the ADP1610 and disconnect the output from the input, drive
the SD pin below 0.4 V.
Rev. 0 | Page 14 of 16
IN
SD
SS
RT
SW
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
B
Q1
A
Q1
FDC6331
C
150pF
R
220k
C
OUT
10
F
R1
71.3k
OFF
R2
10k
R3
10k
0
3.3V
10V
Figure 28. Step-Up Regulator with True Shutdown
TFT LCD BIAS SUPPLY
Figure 29 shows a power supply circuit for TFT LCD module
applications. This circuit has +10 V, 5 V, and +22 V outputs.
The +10 V is generated in the step-up configuration. The 5 V
and +22 V are generated by the charge-pump circuit. During the
step-up operation, the SW node switches between 10 V and
ground (neglecting forward drop of the diode and on resistance
of the switch). When the SW node is high, C5 charges up to
10 V. C5 holds its charge and forward-biases D8 to charge C6
to 10 V. The Zener diode, D9, clamps and regulates the output
to 5 V.
The VGH output is generated in a similar manner by the
charge-pump capacitors, C1, C2, and C4. The output
voltage is tripled and regulated down to 22 V by the
Zener diode, D5.
IN
SD
SS
RT
SW
ON
FB
COMP
C
SS
22nF
GND
4
L
4.7
μ
H
D1
D2
D3
BAV99
BAV99
BZT52C22
BZT52C5VIS
BAV99
ADP1610
5
6
3
2
7
8
1
C1
10nF
C
IN
10
μ
F
C
150pF
R
220k
C
OUT
10
F
C2
1
μ
F
C3
10
μ
F
R1
71.3k
R2
10k
D5
D9
0
3.3V
VGL
–5V
VGH
22V
10V
D5
D4
D8
D7
C4
10nF
R3
200
C5
10nF
C6
10
μ
F
R4
200
Figure 29. TFT LCD Bias Supply
SEPIC POWER SUPPLY
The circuit in Figure 30 shows the ADP1610 in a single-ended
primary inductance converter (SEPIC) topology. This topology
is useful for an unregulated input voltage, such as a battery-
powered application in which the input voltage can vary
between 2.7 V to 5 V, and the regulated output voltage falls
within the input voltage range.
The input and the output are dc-isolated by a coupling capaci-
tor, C1. In steady state, the average voltage of C1 is the input
voltage. When the ADP1610 switch turns on and the diode
turns off, the input voltage provides energy to L1, and C1
provides energy to L2. When the ADP1610 switch turns off and
the diode turns on, the energy in L1 and L2 is released to charge
the output capacitor, C
OUT
, and the coupling capacitor, C1, and
to supply current to the load.
2.5V–5.5V
3.3V
IN
SD
SS
RT
SW
ON
FB
COMP
C
SS
22nF
GND
4
L1
4.7
μ
H
4.7
μ
H
L2
ADP1610
5
6
3
2
7
8
1
C
IN
10
μ
F
C
COMP
1nF
R
COMP
60k
C
OUT
10
F
C1
10
μ
F
R1
16.8k
R2
10k
0
Figure 30. 3.3 V DC-DC Converter
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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) |
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