ADP1147 Fast Delivery |IC PHOENIX CO.,LIMITED

ADP1147 ,High Efficiency Step-Down Switching Regulator ControllersGENERAL DESCRIPTIONR resistor, and the R of the P-MOSFET. The powerSENSE DS(ON)The ADP1147 is part ..
ADP1147AN-3.3 ,High Efficiency Step-Down Switching Regulator ControllersSpecifications subject to change without notice.PIN FUNCTION DESCRIPTIONSPinNo. Mnemonic Function1V ..
ADP1147AN-5 ,High Efficiency Step-Down Switching Regulator ControllersGENERAL DESCRIPTIONR resistor, and the R of the P-MOSFET. The powerSENSE DS(ON)The ADP1147 is part ..
ADP1148 ,High Efficiency, Synchronous Step-Down Switching Regulator ControllerCHARACTERISTICS A IN SHUTDOWN2Parameter Symbol Conditions Min Typ Max UnitsFEEDBACK VOLTAGEADP1148 ..
ADP1148AN-3.3 ,InputV: 0.3-20V; 50mA; high efficiency synchronous step-down switching regulator. For notebook and palmtop computers, portable instrumnets, battery operated digital devicesCHARACTERISTICS A IN SHUTDOWN2Parameter Symbol Conditions Min Typ Max UnitsFEEDBACK VOLTAGEADP1148 ..
ADP1148AN-3.3 ,InputV: 0.3-20V; 50mA; high efficiency synchronous step-down switching regulator. For notebook and palmtop computers, portable instrumnets, battery operated digital devicesCHARACTERISTICS (–408C ≤ T ≤ +858C, V = 10 V, V = 0 V, unless otherwise noted. See Figure 17.)A IN ..
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ADP1147
High Efficiency Step-Down Switching Regulator Controllers
REV.0
High Efficiency Step-Down
Switching Regulator Controllers
FUNCTIONAL BLOCK DIAGRAM
FEATURES
Greater Than 95% Efficiency
Current Mode Switching Architecture Provides
Superior Load and Line Transient Response
Wide Input Voltage Range 3.5 V* to 16 V
User Defined Current Limit
Short Circuit Protection
Shutdown Pin
Low Dropout Voltage
Low Standby Current 160 mA typ
Low Cost
Available in 8-Lead PDIP or 8-Lead SOIC
APPLICATIONS
Portable Computers
Modems
Cellular Telephones
Portable Equipment
GPS Systems
Handheld Instruments
GENERAL DESCRIPTION
The ADP1147 is part of a family of High Efficiency Step-Down
Switching Regulators. These regulators offer superior load and
line transient response, a user defined current limit and an
automatic power savings mode. The automatic power savings
mode is used to maintain efficiency at lower output currents.
The ADP1147 incorporates a constant off-time, current mode
switching architecture to drive an external P-channel MOSFET
at frequencies up to 250 kHz. Constant off-time switching gen-
erates a constant ripple current in the external inductor. This
results in a wider input voltage operating range of 3.5 V* to
16 V, and a less complex circuit design.
*3.5 volt operation is for the ADP1147-3.3.
SHUTDOWN50mH
0V = NORMAL
1.5V = SHUTDOWN
RSENSE**
0.05V
VIN (5.2V TO 12V)
VOUT
5V/2A
COUT
390mF
P-CHANNELIRF7204
Figure 1.High Efficiency Step-Down Converter
(Typical Application)
A very low dropout voltage with excellent output regulation can
be obtained by minimizing the dc resistance of the Inductor, the
RSENSE resistor, and the RDS(ON) of the P-MOSFET. The power
savings mode conserves power by reducing switching losses at
lower output currents. When the output load current falls below
the minimum required for the continuous mode the ADP1147
will automatically switch to the power savings mode. It will remain
in this mode until the inductor requires additional current or the
sleep mode is entered. In sleep mode with no load the standby
power consumption of the device is reduced to 2.0 mW typical
at VIN = 10 V.
For designs requiring even greater efficiencies refer to the
ADP1148 data sheet.
LOAD CURRENT – mA
100110k101001k
EFFICIENCY – %
Figure 2.ADP1147-5 Typical Efficiency, Figure 1 Circuit
ADP1147-3.3/ADP1147-5–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
REGULATED OUTPUT VOLTAGE
INPUT DC SUPPLY CURRENT
SHUTDOWN PIN INPUT CURRENT
CT PIN DISCHARGE CURRENT
NOTESAll limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.Dynamic supply current is higher due to the gate charge being delivered at the switching frequency.
Specifications subject to change without notice.
(08C ≤ TA ≤ +708C, VIN = 10 V, VSHUTDOWN = 0 V unless otherwise noted)
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage (Pin 1) . . . . . . . . . . . . . . 16 V to –0.3 V
Continuous Output Current (Pin 8) . . . . . . . . . . . . . . 50 mA
Sense Voltages (Pins 4, 5) . . . . . . . . . . . . . . . . 10 V to –0.3 V
Operating Ambient Temperature Range . . . . . 0°C to +70°C
Extended Commercial Temperature Range . .–40°C to +85°C
Junction Temperature* . . . . . . . . . . . . . . . . . . . . . . . +150°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . +300°C
*TJ is calculated from the ambient temperature, TA, and power dissipation, PD,
according to the following formulas: ADP1147AN-3.3, ADP1147AN-5: TJ = TA +
ORDERING GUIDE
ADP1147-3.3/ADP1147-5
ELECTRICAL CHARACTERISTICS
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
(–408C ≤ T A ≤ +858C, VIN = 10 V, unless otherwise noted)
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
PIN CONFIGURATIONS
8-Lead Plastic DIP (N-8)
TJMAX = 1258C, uJA = 1108C/W
VIN
SENSE+
SHUTDOWN
GND
P-DRIVE
ITH
SENSE–
8-Lead SOIC (SO-8)
TJMAX = 1258C, uJA = 1508C/W
VIN
SENSE+
SHUTDOWN
GND
P-DRIVE
ITH
SENSE–
ADP1147-3.3/ADP1147-5
–Performance Characteristics
MAXIMUM OUTPUT CURRENT – Amps
SENSE
– m
Figure 3.Selecting RSENSE vs.
Maximum Output Current
IOUT – Amps
EFFICIENCY – %
10m30m30.10.31
Figure 6.Typical Efficiency Losses
LOAD CURRENT – mA
OUTPUT VOLTAGE – V
5.08
Figure 9. Load Regulation
FREQUENCY – kHz300100200
Figure 4.Operating Frequency vs.
Timing Capacitor
INPUT VOLTAGE – Volts
EFFICIENCY – %
1005820111417
Figure 7. Efficiency vs. Input Voltage
INPUT VOLTAGE – Volts
SUPPLY CURRENT – mA
1.0
Figure 10. DC Supply Current
(VIN – VOUT) VOLTAGE – Volts
OUT
–
Figure 5.Selecting Minimum Output
Capacitor vs. (VIN – VOUT) and Inductor
INPUT VOLTAGE – V
OUTPUT VOLTAGE – V
5.08
Figure 8.ADP1147-5 Output Voltage
vs. Input Voltage
INPUT VOLTAGE – Volts
SUPPLY CURRENT – 462081012141618
Figure 11.Supply Current in
Shutdown
(VIN – VOUT) – Volts1246810
NORMALIZED FREQUENCY
1.2
Figure 12.Operating Frequency vs.
(VIN–VOUT)
TEMPERATURE – 8C
SENSE VOLTAGE – mV
135
Figure 15.Current Sense Threshold
Voltage
OPERATING FREQUENCY – kHz
GATE CHARGE CURRENT – mA205026080110140170200230
Figure 13.Gate Charge Supply
Current
INPUT VOLTAGE – Volts
EFFICIENCY – %5820111417
Figure 16.Efficiency vs. Input
Voltage at VO = 3.3 V; Figure 1
Circuit with ADP1147-3.3
OUTPUT VOLTAGE – Volts0.30.5511.522.533.33.544.5
OFF-TIME –
Figure 14.Off-Time vs. VOUT
Figure 17.Output Voltage vs. Input
Voltage (VO = 3.3 V); Figure 1 Circuit
with ADP1147-3.3
LOAD CURRENT – mA
OUTPUT VOLTAGE – V
3.30
Figure 18.Load Regulation (VO = 3.3V);
Figure 1 Circuit with ADP1147-3.3
ADP1147-3.3/ADP1147-5
(a) Continuous Mode Operation
3.3V
(b) Power Saving Mode
Figure 19.CT Waveforms
Figure 20.Circuit Diagram Indicating the Recommended
Ground Plane Scheme for PCB Layout
Figure 21.5 V/3A Regulator Using N-Channel Device
Figure 22.3.3 V/2 A Regulator
LOAD CURRENT – mA
100110K10
EFFICIENCY – %
1001K
Figure 23.Efficiency vs. Load Current at VO = 3.3 V;
Figure 22 Circuit

Partno	Mfg	Dc	Qty	Available	Descript
ADP1147	AD	N/a	25	avai	High Efficiency Step-Down Switching Regulator Controllers