ADP3334 0

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a
High Accuracy Low I
Q
, 500 mA
anyCAP
®
Adjustable Low Dropout Regulator
ADP3334
FEATURES
High Accuracy Over Line and Load:
0.9% @ 25
C,
1.8% over Temperature
Ultralow Dropout Voltage: 200 mV (Typ) @ 500 mA
Requires Only C
O
= 1.0
F for Stability
anyCAP = Stable with Any Type of Capacitor
(Including MLCC)
Current and Thermal Limiting
Low Noise
Low Shutdown Current: < 1.0
A (Typ)
2.6 V to 11 V Supply Range
1.5 V to 10 V Output Range
–40
C to +85
C Ambient Temperature Range
Thermally-Enhanced 8-Lead SO Package
FUNCTIONAL BLOCK DIAGRAM
IN
Q1
OUT
THERMAL
PROTECTION
ADP3334
CC
FB
DRIVER
g
m
SD
BANDGAP
REF
GND
APPLICATIONS
Cellular Phones
Camcorders, Cameras
Networking Systems, DSL/Cable Modems
Cable Set-Top Boxes
DSP Supplies
Personal Digital Assistants
GENERAL DESCRIPTION
The ADP3334 is a member of the ADP333x family of precision
low dropout anyCAP voltage regulators. The ADP3334 operates
with an input voltage range of 2.6 V to 11 V and delivers a
continuous load current up to 500 mA. The novel anyCAP
architecture requires only a very small 1 µ F output capacitor for
stability, and the LDO is insensitive to the capacitor’s equiva-
lent series resistance (ESR). This makes ADP3334 stable with any
capacitor, including ceramic (MLCC) types for space restricted
applications.
The ADP3334 achieves exceptional accuracy of ± 0.9% at room
temperature and ± 1.8% over temperature, line, and load. The
dropout voltage of the ADP3334 is only 200 mV (typical) at
500 mA. This device also includes a safety current limit, ther-
mal overload protection and a shutdown feature. In shutdown
mode, the ground current is reduced to less than 1 µ A. The
ADP3334 has low quiescent current 90 µ A (typical) in light
load situations.
IN
ADP3334
OUT
V
IN
IN
OUT
V
OUT
C
IN
1
F
R1
C
NR
C
OUT
1
F
FB
SD
GND
R2
OFF
ON
Figure 1. Typical Application Circuit
The ADP3334 also features ADI’s thermally enhanced Thermal
Coastline package. This allows 1 W of power dissipation without
any external heat sinking.
anyCAP is a registered trademark of Analog Devices, Inc.
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 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., 2001
ADP3334–SPECIFICATIONS
1, 2, 3
(V
IN
= 6.0 V, C
IN
= C
OUT
= 1.0
F, T
A
= –40
C to +85
C, unless otherwise noted.)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
OUTPUT
Voltage Accuracy
4
V
OUT
V
IN
= V
OUT(NOM)
+ 0.4 V to 11 V
–0.9
+0.9
%
I
L
= 0.1 mA to 500 mA
T
A
= 25° C
V
IN
= V
OUT(NOM)
+ 0.4 V to 11 V
–1.8
+1.8
%
I
L
= 0.1 mA to 500 mA
T
A
= 85° C
V
IN
= V
OUT(NOM)
+ 0.4 V to 11 V
–2.3
+2.3
%
I
L
= 0.1 mA to 500 mA
T
J
= 150°
C
Line Regulation
4
V
IN
= V
OUT(NOM)
+ 0.4 V to 11 V
0.04
mV/V
I
L
= 0.1 mA
T
A
= 25°
C
Load Regulation
I
L
= 0.1 mA to 500 mA
0.04
mV/mA
T
A
= 25°
C
Dropout Voltage
V
DROP
V
OUT
= 98% of V
OUT(NOM)
I
L
= 500 mA
200
400
mV
I
L
= 300 mA
140
250
mV
I
L
= 100 mA
60
140
mV
I
L
= 1 mA
10
mV
Peak Load Current
I
LDPK
V
IN
= V
OUT(NOM)
+ 1 V
800
mA
Output Noise
V
NOISE
f = 10 Hz–100 kHz, C
L
= 10 µ F
27
µ V rms
I
L
= 500 mA, C
NR
= 10 nF
f = 10 Hz–100 kHz, C
L
= 10 µ F
45
µ V rms
I
L
= 500 mA, C
NR
= 0 nF
GROUND CURRENT
5
In Regulation
I
GND
I
L
= 500 mA
4.5
10
mA
I
L
= 300 mA
2.6
6
mA
I
L
= 50 mA
0.5
1.5
mA
I
L
= 0.1 mA
90
130
A
In Dropout
I
GND
V
IN
= V
OUT(NOM)
– 100 mV
150
450
A
I
L
= 0.1 mA
In Shutdown
I
GNDSD
SD = 6 V, V
IN
= 11 V
0.9
3
A
SHUTDOWN
Threshold Voltage
V
THSD
LDO OFF
2.0
V
LDO ON
0.4
V
SD Input Current
I
SD
0 ≤
SD ≤
5 V
1.2
3
µ A
Output Current In Shutdown
I
OSD
T
A
= 25°
C, V
IN
= 11 V
0.01
5
µ A
T
A
= 85°
C, V
IN
= 11 V
0.01
5
µ A
NOTES
1
All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC) methods.
2
Ambient temperature of 85
C corresponds to a junction temperature of 125
C under pulsed full load test conditions.
3
Application stable with no load.
4
V
IN
= 2.6 V to 11 V for models with V
OUT(NOM)
2.2 V.
5
Ground current includes current through external resistors.
Specifications subject to change without notice.
–2–
REV. 0
ADP3334
ABSOLUTE MAXIMUM RATINGS
*
Input Supply Voltage . . . . . . . . . . . . . . . . . . . –0.3 V to +16 V
Shutdown Input Voltage . . . . . . . . . . . . . . . . –0.3 V to +16 V
Power Dissipation . . . . . . . . . . . . . . . . . . . Internally Limited
Operating Ambient Temperature Range . . . . –40
PIN FUNCTION DESCRIPTIONS
Pin
No.
Mnemonic Function
C to +85
C
1
GND
Ground Pin.
Operating Junction Temperature Range . . . –40
C to +150
C
2
SD
Shutdown Control. Pulling this pin low
turns on the regulator.
Storage Temperature Range . . . . . . . . . . . . –65
C to +150
C
JA
2-Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122.3
C/W
3, 4
IN
Regulator Input.
C/W
Lead Temperature Range (Soldering 6 sec) . . . . . . . . . 300
C
*
This is a stress rating only; operation beyond these limits can cause the device
to be permanently damaged.
5, 6
OUT
Output. Bypass to ground with a 1.0 µ F
or larger capacitor.
7
FB
Feedback Input. FB should be connected
to an external resistor divider which sets
the output voltage.
ORDERING GUIDE
8
NC
No connection.
Model
Output
Package
Package
Description
Option
PIN CONFIGURATION
ADP3334AR ADJ
Standard Small
SO-8
Outline Package
(SOIC-8)
GND
SD
IN
IN
1
2
3
4
8
7
6
5
NC
FB
OUT
OUT
TOP VIEW
(Not to Scale)
NC = NO CONNECT
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 ADP3334 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.
WARNING!
ESD SENSITIVE DEVICE
REV. 0
–3–
JA
4-Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86.6
ADP3334
ADP3334–Typical Performance Characteristics
2.202
2.201
140
V
OUT
= 2.2V
V
OUT
= 2.2V
V
IN
= 6V
I
L
= 100
A
V
OUT
= 2.2V
I
L
= 0
2.201
2.200
120
2.200
2.199
100
2.199
2.198
150mA
80
2.198
2.197
I
L
= 0
60
2.197
2.196
300mA
40
2.196
2.195
2.195
500mA
2.194
20
2.194
2.193
0
0
2
4
6
8
10
12
0
100
200
300
400
500
2
4
6
8
10
12
INPUT VOLTAGE – Volts
OUTPUT LOAD – mA
INPUT VOLTAGE – Volts
TPC 1. Line Regulation Output
Voltage vs. Supply Voltage
TPC 2. Output Voltage vs. Load
Current
TPC 3. Ground Current vs. Supply
Voltage
5.0
0.5
8
V
IN
= 6V
V
OUT
= 2.2V
0
I
L
= 500mA
V
IN
= 6V
V
OUT
= 2.2V
0.4
7
4.0
300mA
6
0.3
3.0
0.2
5
300mA
4
2.0
0.1
500mA
3
0
2
100mA
1.0
500mA
–0.1
1
50mA
0
0
0
0
–0.2
0
100
200
300
400
500
–50
–25 0
25 50 75 100
125
150
–50
–25 0
25 50 75 100
125
150
OUTPUT LOAD – mA
JUNCTION TEMPERATURE –
C
JUNCTION TEMPERATURE –
C
TPC 4. Ground Current vs. Load
Current
TPC 5. Output Voltage Variation %
vs. Junction Temperature
TPC 6. Ground Current vs. Junction
Temperature
250
V
OUT
= 2.2V
200
V
OUT
= 2.2V
SD = GND
R
L
= 4.4
3.0
2.5
3
2
1
0
4
2
C
OUT
= 1
F
150
2.0
1.5
1.0
C
OUT
= 10
F
100
50
0.5
0
V
OUT
= 2.2V
SD = GND
R
L
= 4.4
0
0
0
100
200
300
400
500
1
2
3
4
200
400
600
800
OUTPUT LOAD – mA
TIME – Sec
TIME –
s
TPC 7. Dropout Voltage vs.
Output Current
TPC 8. Power-Up/Power-Down
TPC 9. Power-Up Response
–4–
REV. 0
 ADP3334
2.210
2.210
2.3
2.200
2.200
2.2
2.190
V
OUT
= 2.2V
R
L
= 4.4
C
L
= 1
F
2.190
V
OUT
= 2.2V
R
L
= 4.4
C
L
= 10
2.1
2.189
2.189
F
2.179
2.179
400
3.500
3.500
200
V
IN
= 6V
V
OUT
= 2.2V
C
L
= 1
3.000
3.000
0
F
40
80
140
180
40
80
140
180
200
400
600
800
TIME –
s
TIME –
s
TIME –
s
TPC 10. Line Transient Response
TPC 11. Line Transient Response
TPC 12. Load Transient Response
2.3
2.2
2.2
0
2
1
F
10
F
2.1
1
10
F
FULL SHORT
1
F
3
SHORT
0
400
2
V
IN
= 6V
V
OUT
= 2.2V
R
L
= 4.4
200
V
OUT
= 2.2V
V
IN
= 6V
C
L
= 10
1
V
IN
= 4V
2
0
F
0
0
200
400
600
800
200
400
600
800
200
400
600
800
TIME –
s
TIME –
s
TIME –
s
TPC 13. Load Transient Response
TPC 14. Short Circuit Current
TPC 15. Turn Off/On Response
–20
160
100
V
OUT
= 2.2V
I
L
= 1mA
V
OUT
= 2.2V
V
OUT
= 2.0V
C
NR
= 10nF
C
L
= 10
F
I
L
= 500mA
–30
140
C
L
= 1
F
I
L
= 500mA
10
F
C
NR
= 10nF
C
L
= 10
F
C
NR
= 0
120
–40
I
L
= 500mA WITHOUT
NOISE REDUCTION
I
L
= 500mA WITH
NOISE REDUCTION
C
L
= 1
F
C
NR
= 0
–50
C
L
= 1
F
100
1
I
L
= 50
A
80
–60
0.1
I
L
= 0mA WITHOUT
NOISE REDUCTION
60
C
L
= 1
F
C
NR
= 10nF
–70
40
0.01
C
L
= 10
F
–80
I
L
= 50
A
20
–90
0
I
L
= 0mA WITH NOISE REDUCTION
0.001
10
100
1k
10k 100k
1M
10M
0
10
20
30
40
50
10
100
1k
10k
100k
1M
FREQUENCY – Hz
C
L
–
F
FREQUENCY – Hz
TPC 16. Power Supply Ripple
Rejection
TPC 17. RMS Noise vs. C
L
(10 Hz–100 kHz)
TPC 18. Output Noise Density
REV. 0
–5–
800m
C
L
= 10
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