Analog Devices ADP3310 b Datasheet
Precision Voltage
a
FEATURES ⴞ1.5% 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
R-8 Package
–40ⴗC to +85ⴗC 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 mΩ of
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 R-8 package.
Regulator Controller
ADP3310
FUNCTIONAL BLOCK DIAGRAM
V
IN
+
ADP3310
EN
V
IN
+
1F
–
OFF
ON
V
REF
R
50mV
BIAS
S
V
EN
IN
IS
GND
NDP6020P
GATE
ADP3310
GND
Figure 1. Typical Application Circuit
50mV
–
IS
GATE
V
OUT
V
OUT
+
10F
–
V
OUT
REV. B
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 that
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 www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2002
ADP3310–SPECIFICATIONS
WARNING!
ESD SENSITIVE DEVICE
(VIN = V
+ 1 V, TA = –40ⴗC to +85ⴗC, unless otherwise noted.)
OUT
Parameter Conditions Symbol Min Typ Max Units
OUTPUT VOLTAGE ACCURACY (Figure 1) V
= V
IN
V
EN
OUT
= 2 V, I
+ 1 V to 15 V
= 10 mA
OUT
to 1 A V
OUT
–1.5 +1.5 %
QUIESCENT CURRENT
Shutdown Mode V
Normal Mode VEN = 2 V, I
GATE TO SOURCE CLAMP VOLTAGE V
= 0 V I
EN
= 0 V, VIN = 15 V 8 10 V
OUT
= 500 µAI
OUT
GND
GND
110µA
800 1000 µA
GATE DRIVE MINIMUM VOLTAGE 0.7 V
GATE DRIVE CURRENT (SINK/SOURCE) 1 mA
GAIN
CURRENT LIMIT THRESHOLD VOLTAGE VIN – V
LOAD REGULATION I
LINE REGULATION V
SHUTDOWN INPUT VOLTAGE V
SHUTDOWN INPUT CURRENT VEN = 0 V to 5.0 V I
Specifications subject to change without notice.
∆V
∆V
GS
OUT
IS
= 10 mA to 1 A –10 +10 mV
OUT
I
OUT
V
IN
IH
IL
= V
+ 1 V to 15 V
OUT
= 100 mA –10 +10 mV
V
EN
EN
40 50 80 mV
2.0 V
–10 +10 µA
80 dB
0.4 V
ABSOLUTE MAXIMUM RATINGS*
Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 V
Enable Input Voltage . . . . . . . . . . . . . . . 0.3 V to V
+ 0.3 V
IN
Operating Junction Temperature Range . . . –40°C to +125°C
Operating Temperature Range . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . 300°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . 215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220°C
(Four-Layer Board) . . . . . . . . . . . . . . . . . . . . . . 121°C/W
θ
JA
θ
(Two-Layer Board . . . . . . . . . . . . . . . . . . . . . . . 150°C/W
JA
*This is a stress rating only; operation beyond these limits can cause the device to
be permanently damaged.
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 ADP3310 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.
–2–
REV. B
ADP3310
1
2
3
4
8
7
6
5
TOP VIEW
(Not to Scale)
NC = NO CONNECT
ADP3310
IS
NC
GND
EN
NC
GATE
V
IN
V
OUT
ORDERING GUIDE
Model Output Voltage Package Option*
ADP3310AR-2.8 2.8 V SOIC-8
ADP3310AR-3 3 V SOIC-8
ADP3310AR-3.3 3.3 V SOIC-8
ADP3310AR-5 5 V SOIC-8
*SO = Small Outline. Contact the factory for the availability of other output
voltage options from 5 V to 16.5 V.
PIN FUNCTION DESCRIPTIONS
Pin No. Mnemonic Function
1ISCurrent Sense. Connected to the more
negative terminal of the sense resistor as
well as the power MOSFET’s source
pin. IS must be tied to the V
pin if the
IN
current limit feature is not used.
2, 6 NC No Connect
3 GATE Gate Drive for the External MOSFET
4V
IN
Input Voltage. This is also the positive
terminal connection of the current sense
resistor.
5V
OUT
Output Voltage Sense. This pin is
connected to the MOSFET’s drain and
directly to the load for optimal load
regulation. Bypass to ground with a 10 µF
or larger capacitor.
7GND Device Ground. This pin should be tied
to system ground closest to the load.
8ENEnable. Pulling this pin to a logic high
or tying the pin to the input voltage will
enable the output. Pulling this pin low
will disable the regulator output.
PIN CONFIGURATION
REV. B
Table I. Alternate PMOS Devices
PMOS NDP6020P IRF7404 Si9434DY
Manufacturer Fairchild IR Temic
R
DS(ON)
I
Continuous @ 25°C –27 A @ VGS = –4.5 V –5.3 A @ VGS = –4.5 V –6.4 A
D
@ 25°C 75 W 1.6 W 2.5 W
P
D
0.075 Ω @ VGS = –2.5 V 0.06 Ω @ VGS = –2.7 V 0.06 Ω @ VGS = –2.5 V
Derating Factor 0.5 W/°C 0.011 W/°C 1.6 W @ 70°C
Package TO-220 SOIC-8 SOIC-8
–3–
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