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даташит ADP3000AR PDF ( Datasheet )

ADP3000AR Datasheet PDF Download - Analog Devices

Номер произв ADP3000AR
Описание Micropower Step-Up/Step-Down Fixed 3.3 V/ 5 V/ 12 V and Adjustable High Frequency Switching Regulator
Производители Analog Devices
логотип Analog Devices логотип 
предварительный просмотр
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ADP3000AR Даташит, Описание, Даташиты
a
Micropower Step-Up/Step-Down
Fixed 3.3 V, 5 V, 12 V and Adjustable
High Frequency Switching Regulator
ADP3000
FEATURES
Operates at Supply Voltages from 2 V to 30 V
Works in Step-Up or Step-Down Mode
Very Few External Components Required
High Frequency Operation Up to 400 kHz
Low Battery Detector on Chip
User Adjustable Current Limit
Fixed and Adjustable Output Voltage
8-Pin DIP and SO-8 Package
Small Inductors and Capacitors
APPLICATIONS
Notebook, Palmtop Computers
Cellular Telephones
Hard Disk Drives
Portable Instruments
Pagers
GENERAL DESCRIPTION
The ADP3000 is a versatile step-up/step-down switching
regulator that operates from an input supply voltage of 2 V to
12 V in step-up mode and up to 30 V in step-down mode.
The ADP3000 operates in Pulse Frequency Mode (PFM) and
consumes only 500 µA, making it highly suitable for applica-
tions that require low quiescent current.
The ADP3000 can deliver an output current of 100 mA at
3 V from a 5 V input in step-down configuration and 180 mA at
3.3 V from a 2 V input in step-up configuration.
The auxiliary gain amplifier can be used as a low battery detector,
linear regulator undervoltage lockout or error amplifier.
The ADP3000 operates at 400 kHz switching frequency. This
allows the use of small external components (inductors and
capacitors), making the device very suitable for space constrained
designs.
FUNCTIONAL BLOCK DIAGRAM
SET
A1
VIN
GAIN BLOCK/
ERROR AMP
1.245V
REFERENCE
400kHz
OSCILLATOR
COMPARATOR
DRIVER
R1 R2
ADP3000
GND
SENSE
A0
ILIM
SW1
SW2
VIN
2V–3.2V
100µF
10V
120
6.8µH IN5817
3.3V @
180mA
12
ILIM
VIN
SW1 3
ADP3000-3.3V
FB
(SENSE)
8
GND SW2
54
+ C1
100µF
10V
C1, C2: AVX TPS D107 M010R0100
L1: SUMIDA CD43-6R8
Figure 1. Typical Application
VIN
5V–6V
C1
100µF
10V
RLIM
120
1 23
ILIM VIN SW1
FB 8
ADP3000
GND
5
SW2 4
D1
1N5818
C1, C2: AVX TPS D107 M010R0100
L1: SUMIDA CD43-100
L1
10µH
CL +
100µF
10V
R2
150k
1%
VOUT
3V
100mA
R1
110k
1%
Figure 2. Step-Down Mode Operation
REV. 0
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: 617/329-4700 World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
© Analog Devices, Inc., 1997

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ADP3000AR Даташит, Описание, Даташиты
ADP3000–SPECIFICATIONS (0؇C TA +70؇C, VIN = 3 V unless otherwise noted)*
Parameter
Conditions
ADP3000
Symbol Min Typ Max
Units
INPUT VOLTAGE
Step-Up Mode
Step-Down Mode
VIN 2.0
12.6 V
30.0 V
SHUTDOWN QUIESCENT CURRENT
COMPARATOR TRIP POINT
VOLTAGE
VFB > 1.43 V; VSENSE > 1.1 × VOUT
ADP30001
IQ
500
1.20 1.245 1.30
µA
V
OUTPUT SENSE VOLTAGE
ADP3000-3.32
ADP3000-52
ADP3000-122
VOUT
3.135 3.3 3.465 V
4.75 5.00 5.25 V
11.40 12.00 12.60 V
COMPARATOR HYSTERESIS
ADP3000
8 12.5 mV
OUTPUT HYSTERESIS
ADP3000-3.3
ADP3000-5
ADP3000-12
32 50 mV
32 50 mV
75 120 mV
OSCILLATOR FREQUENCY
DUTY CYCLE
SWITCH ON TIME
SWITCH SATURATION VOLTAGE
STEP-UP MODE
STEP-DOWN MODE
FEEDBACK PIN BIAS CURRENT
SET PIN BIAS CURRENT
GAIN BLOCK OUTPUT LOW
REFERENCE LINE REGULATION
GAIN BLOCK GAIN
GAIN BLOCK CURRENT SINK
CURRENT LIMIT
CURRENT LIMIT TEMPERATURE
COEFFICIENT
VFB > VREF
ILIM Tied to VIN, VFB = 0
TA = +25°C
VIN = 3.0 V, ISW = 650 mA
VIN = 5.0 V, ISW = 1 A
VIN = 12 V, ISW = 650 mA
ADP3000 VFB = 0 V
VSET = VREF
ISINK = 300 µA
VSET = 1.00 V
5 V VIN 30 V
2 V VIN 5 V
RL = 100 k3
VSET 1 V
220 from ILIM to VIN
fOSC
D
tON
VSAT
IFB
ISET
VOL
AV
ISINK
ILIM
350 400
65 80
1.5 2
450 kHz
%
2.55 µs
0.5 0.75 V
0.8 1.1 V
1.1 1.5 V
160 330 nA
200 400 nA
0.15 0.4 V
1000
0.02
0.2
6000
300
400
0.15
0.6
%/V
%/V
V/V
µA
mA
–0.3 %/°C
SWITCH OFF LEAKAGE CURRENT
Measured at SW1 Pin
VSW1 = 12 V, TA = +25°C
1 10 µA
MAXIMUM EXCURSION BELOW GND TA = +25°C
ISW1 10 µA, Switch Off
–400 –350 mV
NOTES
1This specification guarantees that both the high and low trip point of the comparator fall within the 1.20 V to 1.30 V range.
2The output voltage waveform will exhibit a sawtooth shape due to the comparator hysteresis. The output voltage on the fixed output versions will always be within the
specified range.
3100 kresistor connected between a 5 V source and the AO pin.
*All limits at temperature extremes are guaranteed via correlation using standard statistical methods.
Specifications subject to change without notice.
–2– REV. 0

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ADP3000AR Даташит, Описание, Даташиты
Mnemonic
ILIM
VIN
SW1
SW2
GND
AO
SET
FB/SENSE
ADP3000
PIN DESCRIPTIONS
Function
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 resistor.
Input Voltage.
Collector of power transistor. For step-down
configuration, connect to VIN. For step-up
configuration, connect to an inductor/diode.
Emitter of power transistor. For step-down
configuration, connect to inductor/diode.
For step-up configuration, connect to ground.
Do not allow this pin to go more than a diode
drop below ground.
Ground.
Auxiliary Gain (GB) output. The open col-
lector can sink 300 µA. It can be left open
if not used.
SET Gain amplifier input. The amplifier’s
positive input is connected to SET pin and its
negative input is connected to 1.245 V. It can
be left open if not used.
On the ADP3000 (adjustable) version, this pin
is connected to the comparator input. On the
ADP3000-3.3, ADP3000-5 and ADP3000-12,
the pin goes directly to the internal resistor
divider that sets the output voltage.
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage, Step-Up Mode . . . . . . . . . . . . . . . 15 V
Input Supply Voltage, Step-Down Mode . . . . . . . . . . . . . 36 V
SW1 Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 V
SW2 Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VIN
Feedback Pin Voltage (ADP3000) . . . . . . . . . . . . . . . . . .5.5 V
Switch Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5 A
Maximum Power Dissipation . . . . . . . . . . . . . . . . . . 500 mW
Operating Temperature Range . . . . . . . . . . . . . 0°C to +70°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . +300°C
Thermal Impedance
SO-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170°C/W
N-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120°C/W
PIN CONFIGURATIONS
8-Lead Plastic DIP
(N-8)
8-Lead SOIC
(SO-8)
ILIM 1
8 FB (SENSE)*
VIN 2 ADP3000 7 SET
TOP VIEW
SW1 3 (Not to Scale) 6 AO
SW2 4
5 GND
ILIM 1
8 FB (SENSE)*
VIN 2 ADP3000 7 SET
TOP VIEW
SW1 3 (Not to Scale) 6 AO
SW2 4
5 GND
* FIXED VERSIONS
* FIXED VERSIONS
ORDERING GUIDE
Model
ADP3000AN-3.3
ADP3000AR-3.3
ADP3000AN-5
ADP3000AR-5
ADP3000AN-12
ADP3000AR-12
ADP3000AN
ADP3000AR
Output
Voltage
3.3 V
3.3 V
5V
5V
12 V
12 V
Adjustable
Adjustable
N = plastic DIP, SO = small outline package.
Package
Option
N-8
SO-8
N-8
SO-8
N-8
SO-8
N-8
SO-8
SET SET
VIN
1.245V
REFERENCE
A2
GAIN BLOCK/
ERROR AMP
A1 OSCILLATOR
COMPARATOR
DRIVER
ADP3000
A0
ILIM
SW1
SW2
GND
FB
Figure 3a. Functional Block Diagram for Adjustable Version
VIN
1.245V
REFERENCE
A1
GAIN BLOCK/
ERROR AMP
OSCILLATOR
COMPARATOR
DRIVER
R1 R2
ADP3000
GND
SENSE
A0
ILIM
SW1
SW2
Figure 3b. Functional Block Diagram for Fixed Version
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 ADP3000 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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