ADP1147AR-3.3 Просмотр технического описания (PDF) - Analog Devices
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ADP1147AR-3.3 Datasheet PDF : 12 Pages
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ADP1147-3.3/ADP1147-5
ELECTRICAL CHARACTERISTICS (–40؇C ≤ T A ≤ +85؇C1, VIN = 10 V, unless otherwise noted)
Parameter
Conditions
VS
REGULATED OUTPUT VOLTAGE
ADP1147-3.3
ADP1147-5
VIN = 9 V
ILOAD = 700 mA
ILOAD = 700 mA
VOUT
INPUT DC SUPPLY CURRENT
Normal Mode
Sleep Mode (ADP1147-3.3)
Sleep Mode (ADP1147-5)
Shutdown
4 V < VIN < 16 V
IQ
4 V < VIN < 16 V
5 V < VIN < 16 V
VSHUTDOWN = 2.1 V, 4 V < VIN < 16 V
CURRENT SENSE THRESHOLD VOLTAGE
ADP1147-3.3
ADP1147-5
VSENSE(–) = VOUT+ 100 mV (Forced)
TA = +25°C
VSENSE(–) = VOUT– 100 mV (Forced)
VSENSE(–) = VOUT+ 100 mV (Forced)
TA = +25°C
VSENSE(–) = VOUT– 100 mV (Forced)
V5–V4
SHUTDOWN PIN THRESHOLD
V6
OFF-TIME
CT = 390 pF, ILOAD = 700 mA
tOFF
NOTES
1All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.
Specifications subject to change without notice.
PIN FUNCTION DESCRIPTIONS
ADP1147
Min Typ Max Units
3.17 3.33 3.4 V
4.85 5.05 5.2 V
1.6 2.6 mA
160 280 µA
160 280 µA
10 28 µA
25
mV
120 150 175 mV
25
mV
120 150 175 mV
0.55 0.8 2
V
3.8 5 6
µs
Pin
No. Mnemonic
1
VIN
2
CT
3
ITH
4
SENSE(–)
5
SENSE(+)
6
SHUTDOWN
7
GND
8
P-DRIVE
Function
Input Voltage.
External Capacitor Connection. This capacitor sets the operating frequency of the device. The frequency is
also dependent on the input voltage level.
Error Amplifier Decoupling Pin. Pin 3 voltage level causes the comparator current threshold to increase.
This connects to internal resistive divider, which senses the output voltage. Pin 4 is also the (–) input for the
current comparator.
This provides the + input to the current comparator. The offset between Pins 4 and 5 together with RSENSE
establish the current trip threshold.
When this pin is pulled high, it keeps the MOSFET turned off. When the pin is pulled to ground, the
ADP1147 functions normally. This pin cannot be left floating.
Independent ground lines must be connected separately to (a) the negative pin of COUT and (b) the cathode
of the Schottky diode and the negative terminal of CIN.
Provides high current drive for the MOSFET. Voltage swing is from VIN to ground at this pin.
8-Lead Plastic DIP (N-8)
PIN CONFIGURATIONS
8-Lead SOIC (SO-8)
VIN 1
8 P-DRIVE
CT 2 ADP1147 7 GND
TOP VIEW
ITH 3 (Not to Scale) 6 SHUTDOWN
SENSE– 4
5 SENSE+
TJMAX = 125؇C, JA = 110؇C/W
VIN 1
CT 2
ITH 3
SENSE– 4
8 P-DRIVE
ADP1147 7 GND
TOP VIEW
(Not to Scale) 6 SHUTDOWN
5 SENSE+
TJMAX = 125؇C, JA = 150؇C/W
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 ADP1147 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.
REV. 0
–3–
WARNING!
ESD SENSITIVE DEVICE
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