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ADP3310AR-28 데이터시트 PDF




Analog Devices에서 제조한 전자 부품 ADP3310AR-28은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 ADP3310AR-28 기능
기능 Precision Voltage Regulator Controller
제조업체 Analog Devices
로고 Analog Devices 로고


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ADP3310AR-28 데이터시트, 핀배열, 회로
a
FEATURES
؎1.5% Accuracy Over Line, Load and Temperature
Low 800 A (Typical) Quiescent Current
Shutdown Current: 1 A (Typical)
Stable with 10 F Load Capacitor
+2.5 V to +15 V Operating Range
Fixed Output Voltage Options: 2.8 V, 3 V, 3.3 V, 5 V
Up to 10 A Output Current
SO-8 Package
–40؇C to +85؇C Ambient Temperature Range
Internal Gate to Source Protective Clamp
Current and Thermal Limiting
Programmable Current Limit
Foldback Current Limit
APPLICATIONS
Desktop Computers
Handheld Instruments
Cellular Telephones
Battery Operated Devices
Solar Powered Instruments
High Efficiency Linear Power Supplies
Battery Chargers
GENERAL DESCRIPTION
The ADP3310 is a precision voltage regulator controller that
can be used with an external Power PMOS device such as the
NDP6020P to form a two chip low dropout linear regulator.
The low quiescent current (800 µA) and the Enable feature
make this device especially suitable for battery powered systems.
The dropout voltage at 1 A is only 70 mV when used with the
NDP6020P, allowing operation with minimal headroom and
prolonging battery useful life. The ADP3310 can drive a wide
range of currents, depending on the external PMOS device used.
Additional features of this device include: high accuracy (± 1.5%)
over line, load and temperature, gate-to-source voltage clamp to
protect the external MOSFET and foldback current limit. A
current limit threshold voltage of 50 mV (typ) allows 50 mof
board metal trace resistance to provide a 1 A current limit.
The ADP3310 operates from a wide input voltage range from
2.5 V to 15 V and is available in a small SO-8 package.
Precision Voltage
Regulator Controller
ADP3310
FUNCTIONAL BLOCK DIAGRAM
ADP3310
EN BIAS
VIN
+
50mV
IS
VREF
GATE
VOUT
GND
VIN
1F
+
RS
50mV
NDP6020P
+
10F
VOUT
ON
OFF
IS GATE
VIN ADP3310 VOUT
EN
GND
Figure 1. Typical Application Circuit
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1999




ADP3310AR-28 pdf, 반도체, 판매, 대치품
ADP3310–Typical Performance Characteristics (Circuit of Figure 1)
3.310
3.305
VIN = 5V
3.300
3.295
3.290
0.001
0.01
0.1 0
10
ILOAD – mA
100
Figure 2. VOUT vs. ILOAD (VIN = 5 V)
1000
1.6
ILOAD = 10mA
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
3.5
5.5
7.5
9.5
11.5
13.5
15.5
VIN – V
Figure 5. IGND vs. VIN (ILOAD = 10 mA)
3.310
ILOAD = 1A
3.305
3.300
3.295
3.290
3.5
5.5
7.5
9.5
11.5
13.5
VIN – V
Figure 3. VOUT vs. VIN (ILOAD = 1 A)
15.5
2.0
ILOAD = 1A
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
3.5
5.5
7.5
9.5
11.5
13.5
VIN – V
Figure 6. IGND vs. VIN (ILOAD = 1 A)
15.5
3.310
ILOAD = 10mA
3.305
3.300
3.295
3.290
3.7
4
4.5 5 7 9
VIN – V
11 13
Figure 4. VOUT vs. VIN (ILOAD = 10 mA)
15
1.2
VIN = 5V
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.001
0.01
0.1 1
10
ILOAD – mA
100
Figure 7. IGND vs. ILOAD (VIN = 5 V)
1000
–4– REV. A

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ADP3310AR-28 전자부품, 판매, 대치품
ADP3310
Current Limit Threshold Voltage = 0.05 V
Safety Factor = 1.5
IO = Output Current
RS is not needed in circuits that do not require current limiting.
In that case, the IS pin must be tied to the input pin.
The simplest and cheapest sense resistor for high current applica-
tions, (i.e., Figure 1) is a PCB trace. The temperature depen-
dence of the copper trace and the thickness tolerances of the
trace must be taken into account in the design. The resistivity of
copper has a positive temperature coefficient of +0.39%/°C.
Copper’s Tempco in conjunction with the proportional-to-
absolute temperature (PTAT) current limit voltage can provide
an accurate current limit. Table II provides the resistance value
for PCB copper traces. Alternately, an appropriate sense resistor
such as surface mount sense resistors available from KRL can be
used.
PCB-Layout Issues
For optimum voltage regulation, place the load as close as pos-
sible to the device’s VOUT and GND pins. It is recommended to
use dedicated PCB traces to connect the MOSFET’s drain to
the positive terminal and GND to the negative terminal of the
load to avoid voltage drops along the high current carrying PCB
traces.
Application Circuits
Typical 3 A LDO Circuit
The ADP3310 and a power MOSFET can be used to power the
new generation of CPUs and microprocessors from the standard
+5 V supply at a very low cost (Figure 14). This circuit provides
low dropout, fast switching and high switching load current
from 0 A to 3 A. Due to the high switching load current, capaci-
tors with high ripple current carrying capability, such as OSCON
or special tantalum capacitors from Sprague (593D), are recom-
mended for the output.
Table II. Printed Circuit Copper Resistance
Conductor
Thickness
1/2 oz/ft2
(18 µm)
1 oz/ft2
(35 µm)
2 oz/ft2
(70 µm)
3 oz/ft2
(106 µm)
Conductor Width
In
0.025
0.050
0.100
0.200
0.500
0.025
0.050
50mV/d0i.v100
0.200
0.500
2V/div
0.025
0.050
0.100
0.200
0.500
0.025
0.050
0.100
0.200
0.500
Resistance
m/In
39.3
19.7
9.83
4.91
1.97
19.7
9.83
5µs/di4v.91
2.46
0.98
9.83
4.91
2.46
1.23
0.49
6.5
3.25
1.63
0.81
0.325
4.5V TO 5.5V
220F +
OSCON
10F
1k
R2
0.011
M1
NDP6020P
IS
VIN
GATE
ADP3310-3.3
EN VOUT
GND
10F
+ 3.3V
3 ؋ 220F
OSCON
Figure 14. Typical 3 A Low Dropout Regulator Circuit
VIN = 5V TO 15V
OSCON
220F +
CIN
C1
1F
** COILTRONICS CTX-68-4
** KRL SL-1-C1-ORO5OL
RC
1k
CC
22nF
C2
10nF
VIN
P-DRIVE
INT VCC
SD
ADP1148
SENSE+
ITH SENSE
CT
470pF
CT N-DRIVE
FB
S-GND P-GND
IRF7204
L*
68µH
RSENSE** OSCON
0.1220F
C3 C4
1nF
R1
30.1k
1%
N-CH
IRF7403
D1
10BQ040
2N3906
Q1
R2
124k
1%
MI
IRF7404
IS GATE
IN OUT
ADP3310-3.3
EN GND
2N3906
Q2
BAT54
3.3V/1A
C5
10F
R3
274k
Figure 15. High Current Post Regulator with SOIC PMOS
REV. A
–7–

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부품번호상세설명 및 기능제조사
ADP3310AR-28

Precision Voltage Regulator Controller

Analog Devices
Analog Devices

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