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ADP1173 датащи(PDF) 3 Page - Analog Devices

номер детали ADP1173
подробное описание детали  Micropower DC-DC Converter
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ADP1173 датащи(HTML) 3 Page - Analog Devices

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ADP1173
–3–
REV. 0
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 V
SW1 Pin Voltage (VSW1) . . . . . . . . . . . . . . . . . . . . . . . . . 50 V
SW2 Pin Voltage (VSW2) . . . . . . . . . . . . . . . . . . –0.5 V to VIN
Feedback Pin Voltage (ADP1173) . . . . . . . . . . . . . . . . . . . 5 V
Sense Pin Voltage (ADP1173, –3.3, –5, –12) . . . . . . . . . 36 V
Maximum Power Dissipation . . . . . . . . . . . . . . . . . . 500 mW
Maximum Switch Current . . . . . . . . . . . . . . . . . . . . . . . . 1.5 A
Operating Temperature Range . . . . . . . . . . . . . 0
°C to +70°C
Storage Temperature Range . . . . . . . . . . . . . –65
°C to 150°C
Lead Temperature, (Soldering, 10 sec) . . . . . . . . . . . . +300
°C
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum
ratings for extended periods of time may affect device reliability.
ORDERING GUIDE
Output
Package
Model
Voltage
Options*
ADP1173AN
ADJ
N-8
ADP1173AR
ADJ
SO-8
ADP1173AN-3.3
3.3 V
N-8
ADP1173AR-3.3
3.3 V
SO-8
ADP1173AN-5
5 V
N-8
ADP1173AR-5
5 V
SO-8
ADP1173AN-12
12 V
N-8
ADP1173AR-12
12 V
SO-8
*N = Plastic DIP, SO = Small Outline Package.
ILIM
VIN
SW1
ADP1173
FB
SW2
GND
4
5
1
2
3
8
7
SET
AO 6
+
L1*
100µH
470µF
75k
56
*L1 = COILTRONICS CTX100-4
4X NICAD
OR
ALKALINE
CELLS
240
470µF
+
470k
24k
IRF7203
+
470µF
+5V
OUTPUT
AT 100mA
Figure 1. Step-Up or Step-Down Converter
PIN CONFIGURATIONS
N-8
SO-8
8-Lead Plastic DIP
8-Lead Plastic SO
WARNING!
ESD SENSITIVE DEVICE
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADP1173 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
AO
ILIM
SW1
GND
VIN
SW2
*FIXED VERSIONS
1
2
3
4
8
7
6
5
ADP1173
TOP VIEW
(Not to Scale)
FB (SENSE)*
SET
AO
ILIM
SW1
GND
VIN
SW2
*FIXED VERSIONS
1
2
3
4
8
7
6
5
ADP1173
TOP VIEW
(Not to Scale)
FB (SENSE)*
SET
PIN FUNCTION DESCRIPTIONS
Mnemonic
Function
ILIM
For normal conditions this pin is connected to
VIN. When lower current is required, a resistor
should be connected between ILIM and VIN.
Limiting the switch current to 400 mA is
achieved by connecting a 220
Ω resistor.
VIN
Input Voltage.
SW1
Collector Node of Power Transistor.
For step-down configuration, connect to VIN;
for step-up configuration, connect to an
inductor/diode.
SW2
Emitter Node of Power Transistor. For step-
down configuration, connect to inductor/
diode; for step-up configuration, connect to
ground. Do not allow this pin to drop more
than a diode drop below ground.
GND
Ground.
AO
Auxiliary Gain (GB) Output. The open
collector can sink 100
µA.
SET
Gain Amplifier Input. The amplifier has
positive input connected to the SET pin and
negative input is connected to 1.245 V
reference.
FB/SENSE
On the ADP1173 (adjustable) version this pin
is connected to the comparator input. On the
ADP1173-3.3, ADP1173-5 and ADP1173-12,
the pin goes directly to the internal application
resistor that sets the output voltage.


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