參數(shù)資料
型號(hào)： ADP1111AN
廠商： ANALOG DEVICES INC
元件分類： 穩(wěn)壓器
英文描述： Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V
中文描述： 1.5 A SWITCHING REGULATOR, 88 kHz SWITCHING FREQ-MAX, PDIP8
封裝： PLASTIC, DIP-8
文件頁(yè)數(shù)： 5/16頁(yè)
文件大小： 408K
代理商： ADP1111AN
ADP1111
–13–
REV. 0
The circuit of Figure 27b may produce multiple pulses when
approaching the trip point due to noise coupled into the SET
input. To prevent multiple interrupts to the digital logic,
hysteresis can be added to the circuit (Figure 27). Resistor
RHYS, with a value of 1 M
to 10 M, provides the hysteresis.
The addition of RHYS will change the trip point slightly, so the
new value for R1 will be:
R1
=
V LOBATT 1.25 V
1.25 V
R2
V L 1.25 V
RL + RHYS
where VL is the logic power supply voltage, RL is the pull-up
resistor, and RHYS creates the hysteresis.
ADP1111
1.25V
REF
GND
AO
5V
RL
47k
TO
PROCESSOR
R1
R2
VBAT
VIN
SET
RHYS
33k
1.6M
Figure 27b.
APPLICATION CIRCUITS
All Surface Mount 3 V to 5 V Step-Up Converter
This is the most basic application (along with the basic step-
down configuration to follow) of the ADP1111. It takes full
advantage of surface mount packaging for all the devices used in
the design. The circuit can provide +5 V at 100 mA of output
current and can be operated off of battery power for use in
portable equipment.
+
L1
D1
CL
33F
OUTPUT
R3*
(OPTIONAL)
MBRS120T3
20H
CTX20-4
(5V @ 100mA)
INPUT +3V
ILIM VIN
SW2
SW1
SENSE
GND
SET
AO
ADP1111-5
NC
1
2
6
7
5
3
8
NC
4
Figure 28. All Surface Mount +3 V to +5 V Step-Up Converter
9 V to 5 V Step-Down Converter
This circuit uses a 9 V battery to generate a +5 V output. The
circuit will work down to 6.5 V, supplying 50 mA at this lower
limit. Switch current is limited to around 500 mA by the 100
resistor.
ILIM VIN SW1
SW2
SENSE
GND
SET
AO
ADP1111-5
NC
L1
CL
22F
D1
1N5818
RLIM
100
1
+
15H
CTX15-4
INPUT
2
3
6
7
5
4
8
NC
OUTPUT
(9VIN TO 5V @ 150mA,
6.5VIN TO 5V @ 50mA)
9V
Figure 29. 9 V to 5 V Step-Down Converter
20 V to 5 V Step-Down Converter
This circuit is similar to Figure 29, except it supplies much
higher output current and operates over a much wider range of
input voltage. As in the previous examples, switch current is
limited to 500 mA.
ILIM VIN SW1
SW2
SENSE
GND
SET
AO
ADP1111-5
NC
L1
CL
47F
D1
1N5818
RLIM
100
1
+
68H
CTX68-4
12V TO 28V
INPUT
2
3
6
7
5
4
8
NC
OUTPUT
(+5V @ 300mA)
Figure 30. 20 V to 5 V Step-Down Converter
+5 V to –5 V Converter
This circuit is essentially identical to Figure 22, except it uses a
fixed-output version of the ADP1111 to simplify the design
somewhat.
ILIM VIN SW1
SW2
GND
SET
AO
ADP1111-5
NC
L1
CL
33F
D1
1N5818
RLIM
100
1
+
33H
CTX33-2
12V TO 28V
INPUT
2
3
6
7
5
4
8
NC
–5V
@ 75mA
SENSE
Figure 31. +5 V to –5 V Converter
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADP1111AN-12 制造商:Analog Devices 功能描述:Conv DC-DC Single Non-Inv/Inv/Step Up/Step Down 2V to 30V 8-Pin PDIP N 制造商:Rochester Electronics LLC 功能描述:MICROPOWER STEP-UP/DOWN SWITCHING REG. - Bulk
ADP1111AN-3.3 制造商:Analog Devices 功能描述:Conv DC-DC Single Non-Inv/Inv/Step Up/Step Down 2V to 30V 8-Pin PDIP N 制造商:Rochester Electronics LLC 功能描述:MICROPOWER STEP-UP/DOWN SWITCHING REG. - Bulk
ADP1111AN-33 制造商:AD 制造商全稱:Analog Devices 功能描述:Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V
ADP1111AN-5 制造商:Analog Devices 功能描述:Conv DC-DC Single Non-Inv/Inv/Step Up/Step Down 2V to 30V 8-Pin PDIP N 制造商:Rochester Electronics LLC 功能描述:MICROPOWER STEP-UP/DOWN SWITCHING REG. - Bulk
ADP1111ANZ 制造商:Analog Devices 功能描述:Conv DC-DC Single Non-Inv/Inv/Step Up/Step Down 2V to 30V 8-Pin PDIP 制造商:Analog Devices 功能描述:IC V REG STEP UP/DOWN ADJ PDIP8
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