ADP3000AR-3.3-REEL [ADI]
Micropower Step-Up/Step-Down Fixed 3.3 V, 5 V, 12 V, Adjustable High Frequency Switching Regulator; 微功率升压/降压型固定3.3 V ， 5 V ， 12 V ，可调节高频开关稳压器
| 型号： | ADP3000AR-3.3-REEL |
| 厂家： | 
ADI |
| 描述： | Micropower Step-Up/Step-Down Fixed 3.3 V, 5 V, 12 V, Adjustable High Frequency Switching Regulator |
| 文件： | 总16页 (文件大小：650K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Micropower Step-Up/Step-Down Fixed 3.3 V, 5 V, 12 V,
Adjustable High Frequency Switching Regulator
ADP3000
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
SET
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
A1
A0
V
IN
I
GAIN BLOCK/
ERROMP
LIM
SW1
1.245V
REFERENCE
40z
OSATOR
User-adjustable current limit
Fixed and adjustable output voltage
8-lead PDIP, 8-lead SOIC, and 14-lead TSSOP packages
Small inductors and capacitors
DRIVER
SW2
OMPA
R2
ADP3000
APPLICATIONS
GND
SENSE
Notebook, palmtop computers
Cellular telephones
Hard disk drives
Portable instruments
Pagers
igure 1.
IN5817
6.8µH
3.3V
180mA
V
2V TO 3.2V
V
120V
1
2
I
V
LIM
IN
SW1
GENERAL DESCRIPTION
3
8
ADP3000-3.3V
The ADP3000 is a versatile step-up/step-down switchin
regulator. It operates from an input supply voltage of 2
12 V in step-up mode, and from 2 V to 30 V in step-dow
C1
100µF
FB
(SENSE)
+
10V
GND
5
SW2
4
Operating in pulse frequency mode (PFM), e device consumes
only 500 µA, making it ideal for applicatiorequg l
quiescent current. It delivers an output current of 180 mt
3.3 V from a 2 V input in step-up and an outpuurrent
of 100 mA at 3 V from a 5 V in-wn mode.
C1, C2 = AVX TPS D107 M010R0100
L1 = SUMIDA CR43-6R8
Figure 2. Typical Application
V
IN
5V TO 6V
C1
100µF
10V
R
120Ω
LIM
The ADP3000 operates at 400 kequency. This
allows the use of smalal com(inductors and
capacitors), makint for se-constrained designs.
1
2
3
I
V
SW1
LIM
IN
8
4
FB
ADP3000
The auxiliary gain used as a low battery detector,
linear regulator, undout, or error amplifier.
SW2
V
OUT
3V
100mA
L1
10µH
R2
150kΩ
1%
GND
5
C
100µF
10V
L
+
D1
1N5818
R1
110kΩ
1%
C1, C2 = AVX TPS D107 M010R0100
L1 = SUMIDA CR43-100
Figure 3. Step-Down Mode Operation
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 that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
www.analog.com
© 2004 Analog Devices, Inc. All rights reserved.
ADP3000
TABLE OF CONTENTS
Specifications..................................................................................... 3
Programming the Gain Block................................................... 11
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
Pin Configurations and Function Descriptions ........................... 5
Typical Performance Characteristics ............................................. 6
Theory of Operation ........................................................................ 9
Applications Information .............................................................. 10
Component Selection................................................................. 10
Programming the Switching Current Limit............................ 10
Power Transistor Protection Diode in Step-Down
Configuration ............................................................................. 11
Thermal Considerations............................................................ 11
Typical Application Circuits ......................................................... 13
Outline Dimensions...................................................................... 15
Ordering Guide ...................................................................... 16
REVISION HISTORY
9/04—Data Sheet Changed from Rev. 0 to Rev. A
Added RU-14 Package ................................................. Universal
Changes to Table 4.....................................................................10
Changes to Table 5.....................................................................10
Updated Outline Dimensions..................................................15
Changes to Ordering Guide .....................................................1
1/97—Revision 0: Initial Version
Rev. A | Page 2 of 16
ADP3000
SPECIFICATIONS
0°C ≤ TA ≤ +70°C, VIN = 3 V, unless otherwise noted.1
Table 1.
ADP3000
Typ
Parameter
Conditions
Symbol
Min
Max
Unit
V
V
INPUT VOLTAGE
Step-up mode
Step-down mode
VFB > 1.43 V; VSENSE > 1.1 × VOUT
ADP30002
ADP3000-3.33
ADP3000-53
VIN
2.0
12.6
30.0
SHUT-DOWN QUIESCENT CURRENT
COMPARATOR TRIP POINT VOLTAGE
OUTPUT SENSE VOLTAGE
IQ
500
1.245
3.3
.00
12.00
8
µA
V
1.20
1.30
3.465
5.25
12.60
12.5
50
50
120
450
VOUT
3.5
.75
.40
V
V
V
ADP3000-123
ADP3000
COMPARATOR HYSTERESIS
OUTPUT HYSTERESIS
mV
mV
mV
mV
kHz
%
ADP3000-3.3
ADP3000-5
ADP3000-12
32
75
OSCILLATOR FREQUENCY
DUTY CYCLE
fOSC
0
65
400
80
VFB < VREF
SWITCH-ON TIME
ILIM tied to VIN, VFB= 0
TA = +25°C
tON
VS
1.5
2
2.55
µs
SWITCH SATURATION VOLTAGE
Step-Up Mode
VIN = 3.0 V, ISW = 65mA
VIN = 5.0 V, ISW = 1 A
VIN = 12 V, IS= 650 mA
ADP300
VSET =
0.5
0.75
0.8
1.1
V
1.1
1.5
330
400
0.4
0.15
0.6
V
V
Step-Down Mode
FEEDBACK PIN BIAS CURRENT
SET PIN BIAS CURRENT
IFB
160
200
0.15
0.02
0.2
nA
nA
V
ISET
VOL
GAIN BLOCK OUTPUT LOW
REFERENCE LINE REGULATION
ISINK = 0 V
V ≤ VIN
2 V ≤ VIN ≤ 5 V
10Ω4
%/V
%/V
GAIN BLOCK GAIN
AV
1000
6000
300
400
−0.3
1
V/V
µA
GAIN BLOCK CURRENT SINK
CURRENT LIMIT
VSET ≤ 1
ISINK
ILIM
0 rom ILIM to VIN
mA
%/°C
µA
CURRENT LIMIT TEMPERATUR
SWITCH-OFF LEAKAGE CURREN
Measured at SW1 pin
VSW1= 12 V, TA = +25°C
TA = +25°C
10
MAXIMUM EXCURSND
mV
ISW1 ≤ 10 µA, switch off
−400
−350
1 All limits at temperature extremes are guaranteed via correlation using standard statistical methods.
2This specification guarantees that both the high and low trip points of the comparator fall within the 1.20 V to 1.30 V range.
3The output voltage waveform will exhibit a saw-tooth shape due to the comparator hysteresis. The output voltage on the fixed output versions will always be within
the specified range.
4100 kΩ resistor connected between a 5 V source and the AO pin.
Rev. A | Page 3 of 16
ADP3000
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Input Supply Voltage, Step-Up Mode
Input Supply Voltage, Step-Down Mode
SW1 Pin Voltage
SW2 Pin Voltage
Feedback Pin Voltage (ADP3000)
Switch Current
Maximum Power Dissipation
Operating Temperature Range
Storage Temperature Range
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to
Absolute Maximum Rating conditions for extended periods
may affect device reliability.
Rating
15 V
36 V
50 V
−0.5 V to VIN
5.5 V
1.5 A
500 mW
0°C to +70°C
−65°C to +150°C
300°C
Lead Temperature (Soldering, 10 s)
Thermal Impedance
R-8
RU-14
N-8
170°C/W
150°C/W
120°C/W
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 eadily
accumulate on the human body and test equipment and can discharge without deteonlthough
this product features proprietary ESD protection circuitry, permanent damage may occn devic
subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionalit
Rev. A | Page 4 of 16
ADP3000
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
I
1
2
3
4
8
7
6
5
FB (SENSE)*
SET
LIM
I
1
2
3
4
8
7
6
5
FB (SENSE)*
SET
LIM
V
IN
ADP3000
ADP3000
TOP VIEW
(Not to Scale)
V
IN
SW1
SW2
AO
TOP VIEW
SW1
SW2
AO
(Not to Scale)
GND
GND
*FIXED VERSIONS
*FIXED VERSIONS
Figure 6. 8-Lead SOIC (R-8)
Figure 4. 8-Lead Plastic DIP (N-8)
1
2
3
4
5
6
7
NC
14
13
12
11
NC
FB
NC
ILIM
VIN
SET
AO
ADP3000
TOP VIEW
(Not to Scale)
SW1
NC
10 NC
9
8
NC
SW2
GND
NC = NO CONNECT
Figure 5. 14-lead TSSOP (RU-14)
Table 3. Pin Function Descriptions
Mnemonic
Function
ILIM
For normal conditions, connect to VIN. Wheower cent is required, connect a resistor between ILIM and VIN.
To limit the switch current to onne2Ω resistor.
Input Voltage.
VIN
SW1
Collector of Power Transin configuration, connect to VIN. For step-up configuration, connect
to an inductor/diode.
SW2
Emitter of Power sistor. wn configuration, connect to inductor/diode. For step-up
configurationonnect to groundo not allow pin to go more than a diode drop below ground.
Ground.
GND
AO
Auxiliary Gain Bk (GB) Ouut. Open collector can sink 300 µA. This pin can be left open if not used.
SET
Auxilain Amplifier Int. The amplifier’s positive input is connected to the SET pin, and its negative
innected to e 1.245 V reference. This pin can be left open if not used.
adjustable) version, this pin is connected to the comparator input. On the ADP3000-3.3,
td the ADP3000-12, the pin goes directly to the internal resistor divider that sets the
outp
FB/SENSE
SET
A0
A1
A0
V
V
IN
IN
I
I
GAIN BLOCK/
ERROR AMP
GAIN BLOCK/
ERROR AMP
LIM
LIM
SW1
SW1
1.245V
1.245V
REFERENCE
REFERENCE
A1
OSCILLATOR
OSCILLATOR
DRIVER
DRIVER
SW2
SW2
COMPARATOR
COMPARATOR
R1
R2
ADP3000
ADP3000
GND
FB
GND
SENSE
Figure 7. Functional Block Diagram for Adjustable Version
Figure 8. Functional Block Diagram for Fixed Version
Rev. A | Page 5 of 16
ADP3000
TYPICAL PERFORMANCE CHARACTERISTICS
2.5
406
405
404
403
402
401
400
399
398
OSCILLATOR FREQUENCY
@ T = 25°C
A
2.0
1.5
V
= 5V @ T = 25°C
A
IN
1.0
0.5
0
V
= 3V @ T = 25°C
A
IN
V
= 2V @ T = 25°C
A
IN
0.1
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.5
2
4
6
8
10
12
1
18
24
27
30
SWITCH CURRENT (A)
NPUT VOLTAG
Figure 9. Switch-On Voltage vs. Switch Current in Step-Up Mode
Figure 12. Oscillarequency vs. Input Voltage
1.4
0.8
0.7
0.6
0.5
0.4
0
0.2
0.1
0
= 5V
T
= 0°C
N
A
V
= 5V @ T = 25°C
A
1.2
1.0
0.8
0.6
0.4
0.2
0
IN
T
= 25°C
A
V
= 12V @ T = 25°C
A
IN
T
= 85°C
A
0.1
0.2
0.3
0.4
0.5
0.6
.8
1
10
100
1k
SWITCH CURRENT (A)
R
(Ω)
LIM
Figure 10. Saturation Voltage vs. Switch Step-Dowde
Figure 13. Maximum Switch Current vs. RLIM in Step-Down Mode (5 V)
1400
1200
1.8
V
= 12V
T
= 25°C
IN
A
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
T
= 0°C
A
ENT @ T = 25°C
A
1000
800
600
400
200
0
T
= 85°C
A
1.5
3.0
6
9
12
15
18
21
24
27
30
1
10
100
1k
INPUT VOLTAGE (V)
R
(Ω)
LIM
Figure 11. Quiescent Current vs. Input Voltage
Figure 14. Maximum Switch Current vs. RLIM in Step-Down Mode (12 V)
Rev. A | Page 6 of 16
ADP3000
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
100
90
80
70
60
50
40
30
20
10
0
V
= 3V
IN
T
= 0°C
A
T
= 25°C
A
T
= 85°C
A
1
10
100
1k
–40
0
2
TEMRE (°C(T
70
85
R
(Ω)
LIM
A
Figure 15. Maximum Switch Current vs. RLIM in Step-Up Mode (3 V)
e 18. Duty Cycmperature
440
430
420
410
400
390
380
370
360
350
340
330
0.56
4
0.50
0.48
.46
0.44
0.42
V
= 3V @ I
= 0.65A
SW
IN
–40
0
25
TEMPERATURE (°C(T ))
85
–40
0
25
TEMPERATURE (°C(T ))
70
85
A
A
Figure 16. Oscillator Frequency vs. Temperature
Figure 19. Saturation Voltage vs. Temperature in Step-Up Mode
2.30
1.25
1.20
1.15
2.25
2.20
2.15
2.10
2.05
2.00
1.95
1.90
1.85
1.80
V
= 12V @ I
= 0.65A
SW
IN
1.10
1.05
1.00
0.95
0.90
–40
0
25
TEMPERATURE (°C(T ))
70
85
–40
0
25
TEMPERATURE (°C(T ))
70
85
A
A
Figure 17. Switch-On Time vs. Temperature
Figure 20. Switch-On Voltage vs. Temperature in Step-Down Mode
Rev. A | Page 7 of 16
ADP3000
250
200
150
100
50
350
300
250
200
150
100
50
0
–40
0
–40
0
25
TEMPERATURE (°C(T ))
70
85
0
TEPERA(T ))
70
85
A
A
Figure 21. Feedback Bias Current vs. Temperature
Figure 23in Bias Currenperature
700
600
500
400
300
200
100
0
V
= 20V
IN
–40
0
25
TEMPERATURE (°C(T ))
70
8
A
Figure 22. Quiescent Current vserature
Rev. A | Page 8 of 16
ADP3000
An uncommitted gain block on the ADP3000 can be connected
as a low battery detector. The inverting input of the gain block
is internally connected to the 1.245 V reference. The
noninverting input is available at the SET pin. A resistor divider,
connected between VIN and GND with the junction connected
to the SET pin, causes the AO output to go low when the low
battery set point is exceeded. The AO output is an open
collector NPN transistor that can sink in excess of 300 µA.
THEORY OF OPERATION
The ADP3000 is a versatile, high frequency, switch mode power
supply (SMPS) controller. The regulated output voltage can be
greater than the input voltage (in boost or step-up mode) or less
than the input voltage (in buck or step-down mode). This
device uses a gated oscillator technique to provide high
performance with low quiescent current.
Figure 7 is a functional block diagram of the ADP3000. The
internal 1.245 V reference is connected to one input of the
comparator, and the other input is externally connected (via the
FB pin) to a resistor divider, which is connected to the regulated
output. When the voltage at the FB pin falls below 1.245 V, the
400 kHz oscillator turns on. The ADP3000 internal oscillator
typically provides a 1.7 µs on time and a 0.8 µs off time. A driver
amplifier provides base drive to the internal power switch, and
the switching action raises the output voltage. When the voltage
at the FB pin exceeds 1.245 V, the oscillator shuts off. While the
oscillator is off, the ADP3000 quiescent current is only 500 µA.
The comparator’s hysteresis ensures loop stability without
requiring external components for frequency compensation.
The ADP3000 provides external connections for both the
collector and the emitter of its internal power switch,
permitting both step-up and p-down modes of operation.
For the step-up mode, the mitter (n SW2) is connected to
GND, and the collector (PSWdrives the inductor. For step-
down mode, the emter drivee indur, while the collector
is connected to
The output voltage of tADP3000 is set with two external
resistorsThree fixed voltmodels are also available:
ADP000-3.3 .3 V), ADP3000-5 (5 V), and ADP3000-12
(12 . Thxed voltage models include laser-trimmed,
voltageing resiors on the chip. On the fixed voltage
models of AP3000, simply connect the feedback pin
(Pin 8) directto the output voltage.
The maximum current in the internal power switch is set by
connecting a resistor between VIN and the ILIM pin. When the
maximum current is exceeded, the switch is turned off. The
current limit circuitry has a time delay of about 0.3 µs. I
external resistor is not used, connect ILIM to VIN. This y
maximum feasible current limit. Further information o
included in the Applications Information secti
Rev. A | Page 9 of 16
ADP3000
Table 5. Recommended Capacitors
APPLICATIONS INFORMATION
Vendor
Series
Type
Phone Number
(843) 448-9411
(619) 661-6835
(603) 224-1961
(800) 344-2112
COMPONENT SELECTION
AVX
Sanyo
Sprague
TPS
OS-CON
595D
Surface Mount
Through Hole
Surface Mount
Through Hole
Inductor Selection
For most applications, the inductor used with the ADP3000
falls in the range of 4.7 µH to 33 µH. Table 4 shows
recommended inductors and their vendors.
Panasonic HFQ
Diode Selection
When selecting an inductor for the ADP3000, it is very important
to make sure the inductor is able to handle a current higher than
the ADP3000’s current limit, without becoming saturated.
The ADP3000’s high switching speed demands the use of
Schottky diodes. Suitable choices inde the 1N5817, the
1N5818, the 1N5819, the MBRS10LT3, and the MBR0520LT1.
Fast recovery diodes are not rmmend because their high
forward drop lowers efficincy. al-purpoand small-
signal diodes should be voided as l.
As a general rule, powdered iron cores saturate softly, whereas
Ferrite cores saturate abruptly. Rod and open drum core
geometry inductors saturate gradually. Inductors that saturate
gradually are easier to use. Even though rod and drum core
inductors are attractive in both price and physical size, they
must be used with care because they have high magnetic
radiation. When minimizing EMI is critical, toroid and closed
drum core geometry inductors should be used.
PROGRAMMINTHWITCHING CURRENT LIMIT
The ADP300RLIM pin permthe cycle-by-cycle switch
current limto be programmed with a single external resistor.
This feae offemajor advantages that ultimately decrease
the compocost anhe PCB’s real estate. First, the RLIM
pin allows the DP30 to use low value, low saturation current
and physically sminductors. Additionally, it allows for a
ysically small surface-mount tantalum capacitor with a
typl ESR 0.1 Ω. With this capacitor, it achieves an output
ripple w as 40 mV to 80 mV, as well as a low input ripple.
In addition, inductor dc resistance causes power loss. To
minimize power loss, it is best to use an inductor with a dc
resistance lower than 0.2 Ω.
Table 4. Recommended Inductors
Vendor
Series
Core Type
Phone Number
(561) 752-500
(561) 752-50
(847) 545-670
(845-6700
Coiltronics OCTAPAC
Coiltronics UNIPAC
Sumida
Sumida
Toroid
Open
Open
Semi-Closed
Geometry
e current limit is usually set to approximately 3 to 5 times the
ll load current for boost applications, and about 1.5 to 3 times
the full load current in buck applications.
CR43, CR54
CDRH6D28,
CDRH73,
The internal structure of the ILIM circuit is shown in Figure 24.
Q1, the ADP3000’s internal power switch, is paralleled by sense
transistor Q2. The relative sizes of Q1 and Q2 are scaled so that
IQ2 is 0.5% of IQ1. Current flows to Q2 through both the RLIM
resistor and an internal 80 Ω resistor. The voltage on these two
resistors biases the base-emitter junction of the oscillator-disable
transistor, Q3. When the voltage across R1 and RLIM exceeds 0.6 V,
Q3 turns on and terminates the output pulse. If only the 80 Ω
internal resistor is used (when the ILIM pin is connected directly to
VIN), the maximum switch current is 1.5 A. Figure 13, Figure 14,
and Figure 15 give values for lower current limit levels.
CDRH64
Capacitor Selection
For most applications, the capacitor DP3000
falls in the range of 33 µF to 220 µF. Ta
recommended capacitorvendo
For input and output cw ESR type capacitors for
best efficiency and lowmmended capacitors
include the AVX TPS serieague 595D series, the
Panasonic HFQ series, and the Sanyo OS-CON series.
R
LIM
(EXTERNAL)
V
When selecting a capacitor, it is important to make sure the
maximum capacitor ripple current rms rating is higher than the
ADP3000’s rms switching current.
IN
V
I
IN
LIM
R1
80Ω
(INTERNAL)
I
Q1
Q3
It is best to protect the input capacitor from high turn-on
current charging surges by derating the capacitor voltage by 2:1.
For very low input or output voltage ripple requirements, use
capacitors with very low ESR, such as the Sanyo OS-CON
series. Alternatively, two or more tantalum capacitors can be
used in parallel.
200
SW1
SW2
ADP3000
DRIVER
Q1
Q2
400kHz
OSCILLATOR
POWER
SWITCH
Figure 24. ADP3000 Current Limit Operation
Rev. A | Page 10 of 16
ADP3000
The delay through the current limiting circuit is approximately
0.3 µs. If the switch-on time is reduced to less than 1.7 µs,
accuracy of the current trip point is reduced as well. An attempt
to program a switch-on time of 0.3 µs or less produces spurious
responses in the switch-on time. However, the ADP3000 still
provides a properly regulated output voltage.
VLOBATT −1.245 V
R1 =
⎛
⎜
⎜
⎝
⎞
⎟
⎟
⎠
1.245 V
VL −1.245 V
RL + RHYS
⎛
⎞
−
⎜
⎜
⎟
⎟
R2
⎝
⎠
where:
VL is the logic power supply voltage.
RL is the pull-up resistor.
HYS creates the hysteresis.
PROGRAMMING THE GAIN BLOCK
R
The ADP3000’s gain block can be used as a low battery detector,
an error amplifier, or a linear post regulator. It consists of an op
amp with PNP inputs and an open-collector NPN output. The
inverting input is internally connected to the 1.245 V reference,
and the noninverting input is available at the SET pin. The NPN
output transistor sinks in excess of 300 µA.
POWER TRANSISTOR PROTECTION DIODE IN
STEP-DOWN CONFIGURTION
When operating the ADP30 in ste-down mode with the
switch off, the output voltis iressed across the internal
power switch’s emitt-base jion. Whn the output voltage
is set to higher th6 V, a Schotdie must be placed in a
series with SWto tect the swit. Figure 26 shows the
proper way to place D2e protection diode. The selection of
this diois identical to thtep-down commuting diode (refer
to thDiode Section section).
Figure 25 shows the gain block configured as a low battery
monitor. Set Resistors R1 and R2 to high values to reduce
quiescent current, but not so high that bias current in the SET
input causes large errors. A value of 33 kΩ for R2 is a good
compromise. The value for R1 is then calculated as follows:
V
IN
D1, D2 = 1N5818 SCHOTTKY DIODES
VLOBATT −1.245 V
R
R1 =
1.245 V
1
2
3
V
> 6V
OUT
I
V
SW1
LIM
IN
R2
8
4
FB
where VLOBATT is the desired low battery trip point.
ADP3000
L1
R2
SW2
Because the gain block output is an open-collector NP
pull-up resistor should be connected to the positive log
power supply.
D2
D1
GND
5
+
C1
R1
5
Figure 26. Step-Down Mode VOUT > 6.0 V
R
47kΩ
L
ADP3000
THERMAL CONSIDERATIONS
R1
1.245V
REF
V
BATT
Power dissipation internal to the ADP3000 can be
approximated with the following equations.
SET
ESSOR
R2
33kΩ
Step-Up
VIN ISW
β
⎡
⎤⎡
⎤
⎥
⎦
⎡
⎤
⎥
⎦
VIN 4IO
R
HY
PD = I 2 R +
D 1 −
+
[
IQ
]
[
VIN
]
1.6MΩ
⎢
⎥⎢
⎢
SW
VO ISW
⎣
⎣
⎦⎣
– 1.245V
37.7µA
= BATTERY TRIP POINT
where:
SW is ILIMIT when the current limit is programmed externally;
otherwise, ISW is the maximum inductor current.
V0 is the output voltage.
B
I
Figure 25. Setting the Low Battery Detector Trip Point
I0 is the output current.
VIN is the input voltage.
R is 1 Ω (typical RCE(SAT)).
D is 0.75 (typical duty ratio for a single switching cycle).
IQ is 500 µA (typical shutdown quiescent current).
β = 30 (typical forced beta).
The circuit of Figure 25 may produce multiple pulses when
approaching the trip point due to noise coupled into the SET
input. To prevent multiple interrupts to the digital logic, add
hysteresis to the circuit. Resistor RHYS, with a value of 1 MΩ to
10 MΩ, provides the hysteresis. The addition of RHYS alters the
trip point slightly, changing the new value for R1 to
Rev. A | Page 11 of 16
ADP3000
Step-Down
For example, consider a boost converter with the following
specifications:
⎡
⎢
⎤
⎥
⎦
⎡
⎢
⎤
⎥
2 I
⎡
⎢
⎤
⎥
⎦
⎛
⎞
⎟
⎟
⎠
VO
1
β
O
⎜
PD = ISW VCESAT 1 +
+
[
IQ
]
[VIN
]
⎜
V
− VCE(SAT) ISW
⎢
⎝
⎣
⎥
⎢
⎣
⎥
VIN is 2 V.
VO is 3.3 V.
IO is 180 mA.
IN
⎣
⎦
where:
SW is ILIMIT when the current limit is programmed externally;
otherwise, ISW is the maximum inductor current.
CE(SAT) is 1.2 V (typical value). Check this value by applying ISW
I
ISW is 0.8 A (externally programmed).
Using the step-up power dissipation equation:
V
to Figure 10.
VO is the output voltage.
IO is the output current.
(4) 0.18
0.8
⎡
⎤
(2)(0.8)
30
2
3.3
⎡
⎤
⎡
⎣
⎤
PD = 0.82 ×1 +
[0.75
]
−
+
[
500 E − 6
]
[
2
]
⎢
⎣
⎥
⎦
⎢
⎣
⎥
⎦
⎥
⎦
VIN is the input voltage.
∆T is 185 mW (170°C/W) = 31C, ng the R-8 package.
∆T is 185 mW (120°C/W= 22.2°sing thN-8 package.
D is 0.75 (typical duty ratio for a single switching cycle).
IQ is 500 µA (typical shutdown quiescent current).
β is 30 (typical forced beta).
At a 70°C ambient, e temperature ould be 101.45°C for
the R-8 package and 92.2°C r the N-8 package. These junction
temperatures re well below thaximum recommended
junction tmperatue of 125°C.
The temperature rise can be calculated using the following
equation:
∆T = PD × θJA
Finally, the emperate can be decreased up to 20% by
using a large al grnd plate as ground pickup for the
ADP3000.
where:
∆T is temperature rise.
PD is device power dissipation.
θJA is thermal resistance (junction-to-ambient).
Rev. A | Page 12 of 16
ADP3000
TYPICAL APPLICATION CIRCUITS
L1
6.8µH
L1
15µH
IN5817
IN5817
V
3.3V
180mA
V
OUT
12V
50mA
OUT
V
V
IN
2V TO 3.2V
IN
4.5V TO 5.5V
+
+
C1
100µF
10V
C1
100µF
10V
120Ω
124Ω
1
2
1
2
I
V
I
V
LIM
IN
SW1
LIM
IN
3
8
3
8
SW1
ADP3000-3.3V
ADP3000-12V
C2
100µF
10V
C2
100µF
+
+
SENSE
SENSE
16V
GND
5
SW2
4
GND
5
W2
4
L1 = SUMIDA CR43-6R8
L1 = SUMIDA CR54-150
C1, C2 = AVX TPS D107 M010R0100
TYPICAL EFFICIENCY = 75%
C1 = AVX TPS D107 M0100
C2 = AVX TPS D107 M016
TYPICAL EFFICIEN= 75%
Figure 27. 2 V to 3.3 V/180 mA Step-Up Converter
Fige .5 V to 12 V/50 Step-Up Converter
V
L1
6.8µH
5V TO
C1
100µ
1
IN5817
V
5V
100mA
120Ω
OUT
V
IN
2V TO 3.2V
+
1
2
3
C1
100µF
10V
120Ω
V
SW1
M
IN
1
2
8
4
FB
I
V
LIM
IN
SW1
ADP3000-ADJ
3
8
SW2
V
OUT
3V
100mA
L1
10µH
ADP3000-5V
R2
150kΩ
GND
5
C2
100µF
10V
+
SENSE
C2
100µF
10V
+
D1
1N5817
R1
110kΩ
GND
5
SW2
4
L1 = SUMIDA CR43-100
C1, C2 = AVX TPS D107 M010R0100
TYPICAL EFFICIENCY = 75%
L1 = SUMIDA CR43-6R8
C1, C2 = AVX TPS D107 M010R0100
TYPICAL EFFICIENCY = 80%
Figure 28. 2 V to 5 V/100 mA Step-Uonve
Figure 31. 5 V to 3 V/100 mA Step-Down Converter
V
IN
10V TO 13V
C1
33µF
20V
+
N7
V
5V
150mA
250Ω
OUT
V
IN
2.7V TO 4.5V
+
1
2
3
C1
100µF
10V
120Ω
I
V
SW1
LIM
IN
2
8
4
SENSE
V
IN
W1
ADP3000-5V
3
8
SW2
V
OUT
5V
250mA
L1
10µH
V
C2
100µF
10V
GND
5
+
SE
C2
+
L1: SUMIDA CR43-100
D1
1N5817
100µF
5
SW2
4
C1 = AVX TPS D336 M020R0200
C2 = AVX TPS D107 M010R0100
TYPICAL EFFICIENCY = 77%
10V
L1 = SUMIDA CR43-6R8
C1, C2 = AVX TPS D107 M010R0100
TYPICAL EFFICIENCY = 80%
Figure 29. 2.7 V to 5 V/150 mA Step-Up Converter
Figure 32. 10 V to 5 V/250 mA Step-Down Converter
Rev. A | Page 13 of 16
ADP3000
V
IN
5V
C1
47µF
16V
+
240Ω
1
2
3
I
V
SW1
LIM
IN
8
4
SENSE
ADP3000-5V
SW2
L1
15µH
GND
5
C2
100µF
10V
+
D1
1N5817
V
OUT
–5V
100mA
L1 = SUMIDA CR54-150
C1 = AVX TPS D476 M016R0150
C2 = AVX TPS D107 M010R0100
TYPICAL EFFICIENCY = 60%
Figure 33. 5 V to −5 V/100 mA Inverter
2.5V TO 4.2V
(SUMIDA – CDRH62)
100kΩ
120Ω
330kΩ
6.8µH
2N2907
1N7
100µF
10V
AVX-TPS
+
I
V
IN
LIM
3V
100mA
100kΩ
10kΩ
IN1
IN2
V
O1
1µF
6V (MLC)
SET
SW1
FB
100µF
10V
S
33nF
348kΩ
%
1MΩ
ADP3000
90kΩ
1µF
6V (MLC)
ADP3302AR1
A
0
3V
SD
V
O2
100mA
GND
SW2
GND
90kΩ
Figure 34. 1 Li-Ion to 3 /200 mA Converter with Shut-Down at VIN ≤ 2.5 V
@ V ≤ 2.5V
SHDN IQ = 500µA
IN
75
70
65
I
= 50mA + 50mA
O
I
= 100mA + 100mA
O
VIN
(V)
2.6
3.0
3.4
3.8
4.2
Figure 35. Typical Efficiency of the Circuit of Figure 34
Rev. A | Page 14 of 16
ADP3000
OUTLINE DIMENSIONS
0.375 (9.53)
0.365 (9.27)
0.355 (9.02)
8
1
5
4
0.295 (7.49)
0.285 (7.24)
0.275 (6.98)
0.325 (8.26)
0.310 (7.87)
0.300 (7.62)
0.100 (2.54)
BSC
0.150 (3.81)
0.135 (3.43)
0.120 (3.05)
0.015
(0.38)
0.180
(4.57)
MAX
MIN
0.015 (0.38)
0.010 (0.25)
0.008 (0.20)
0.150 (3.81)
0.130 (3.30)
0.110 (2.79)
0.022 (0.56)
0.018 (0.46)
0.014 (0.36)
SEATING
PLANE
0.060 (1.52)
0.050 (1.27)
0.045 (1.14)
COMPLIANT TO JEDEC STANDARDS MO-095AA
CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMER DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE R USE IN DESIGN
Figure 36. 8-Lead Plastic Dual In-Line kagDIP]
(N-8)
Dimensions shown in inches and (milliers)
5.00 (0.1968)
4.80 (0.
8
1
)
)
4.00 (0.1574)
3.80 (0.1497)
1.27 (0.05
BSC
0.50 (0.0196)
0.25 (0.0099)
× 45°
1.75 (0.0688)
1.35 (0.0532)
0.25 0
0.10 (0)
8°
0.51 (0.0201)
0.31 (0.0122)
0° 1.27 (0.0500)
OPLANARI
0.10
0.25 (0.0098)
0.17 (0.0067)
ATING
PLANE
0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-012AA
LLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
RENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
ERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN
Figure 37. 8-Lead Standard Small Outline Package [SOIC]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
Rev. A | Page 15 of 16
ADP3000
5.10
5.00
4.90
14
8
7
4.50
4.40
4.30
6.40
BSC
1
PIN 1
0.65
BSC
1.05
1.00
0.80
0.20
0.09
1.20
MAX
0.75
0.60
0.45
8°
0°
0.15
0.05
0.30
0.19
SEATING
PLANE
COPLANARITY
0.10
COMPLIANT TO JEDEC STANDARDS MO-153AB-1
Figure 38. 14-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-14)
Dimensions shown in millimeters
ORDERING GUIDE
Model
ADP3000AN
ADP3000AN-3.3
ADP3000AN-5
ADP3000AN-12
ADP3000AR
ADP3000AR-REEL
ADP3000AR-3.3
ADP3000AR-3.3-REEL
ADP3000AR-5
ADP3000AR-5-REEL
ADP3000AR-12
ADP3000AR-12-REEL
ADP3000ARU
Output Voltage
Adjustable
3.3 V
5 V
12 V
Adjustable
Adjustable
3.3 V
3.3 V
5 V
5 V
12 V
12 V
Adjustab
table
Temperature Range
–40°C to +85°C
–40°C to +85°C
–40°C
–40
–40
–40°
–40°C to
to +85°C
–40°o +85°C
–40to +85°C
0°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Packaescription
8-lead plastic DIP
8ad plastic DIP
8-lead plastic DIP
8-lead plastic DIP
8-lead SOIC
8-lead SOIC
8-lead SOIC
8-lead SOIC
8-lead SOIC
8-lead SOIC
8-lead SOIC
8-lead SOIC
14-lead TSSOP
14-lead TSSOP
Package Option
N-8
N-8
N-8
N-8
R-8
R-8
R-8
R-8
R-8
R-8
R-8
R-8
RU-14
RU-14
ADP3000ARU-REEL
©
2004 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
C00122–0–9/04(A)
Rev. A | Page 16 of 16
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