Ultralow, I
Q
, anyCAP
Low Dropout Regulator
ADP3342
®
FEATURES
Accuracy over Line and Load: 4.0% @ 25 C,
5% over Temperature
Ultralow Dropout Voltage: 190 mV (Typ) @ 300 mA
Requires Only C
O
= 1.0 F for Stability
anyCAP Architecture Stable with Any Type of Capacitor
(Including MLCC)
Current and Thermal Limiting
Low Shutdown Current: < 2 A
1.7 V < V
IN
< 6 V
2.8 V < VCC < 6 V
V
OUT
= 1.2 V 5%
–40 C to +100 C Ambient Temperature Range
Ultrasmall Thermally Enhanced 8-Lead MSOP Package
APPLICATIONS
Notebook PCs
Desktop PCs
GENERAL DESCRIPTION
3.3V
FUNCTIONAL BLOCK DIAGRAM
IN
VCC
Q1
OUT
THERMAL
PROTECTION
PWRGD
SD
CC
g
m
DRIVER
BAND GAP +
ADP3342
GND
REF –
The ADP3342 is a unique member of the ADP330x family of
precision low dropout anyCAP voltage regulators. The ADP3342
operates with an input voltage range of 1.7 V to 6 V and delivers a
continuous load current up to 300 mA. In order to support the
ability to regulate from such a low input voltage, the power rail to
the IC, VCC, has been split off from the main power rail, V
IN
,
from which the output is powered.
The ADP3342 stands out from the conventional LDOs with
the lowest thermal resistance of any MSOP-8 package and an
enhanced process that enables it to offer performance advan-
tages beyond its competition. Its patented design requires only a
1.0 µF output capacitor for stability. This device is insensitive to
output capacitor Equivalent Series Resistance (ESR) and is stable
with any good quality capacitor, including ceramic (MLCC)
types for space-restricted applications. The dropout voltage of the
ADP3342 is only 190 mV (typical) at 300 mA. This device also
includes a safety current limit, thermal overload protection, and
a shutdown control pin.
VCC
ADP3342
V
IN
1.8V
1 F
+
IN
OUT
+
1 F
V
OUT
1.2V
SD
PWRGD
ON
OFF
GND
Figure 1. Typical Application Circuit
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. Trademarks and
registered trademarks are the property of their respective companies.
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
© 2003 Analog Devices, Inc. All rights reserved.
ADP3342–SPECIFICATIONS
Parameter
OUTPUT
Voltage Accuracy
Symbol
V
OUT
1, 2
(VCC = 3.0 V, V
IN
= 1.8 V, C
IN
= C
OUT
= 1
F, T
A
= 0 C to +100 C, and
T
A
= –40 C to +100 C, unless otherwise noted.)
Min
–4.0
Typ
Max
+4.0
Unit
%
Conditions
VCC = 2.8 V to 6 V, V
IN
= 1.7 V to 6 V
I
L
= 0.1 mA to 300 mA
T
A
= 25°C
VCC = 2.8 V to 6 V, V
IN
= 1.7 V to 6 V
I
L
= 0.1 mA to 300 mA
T
A
= –40°C to +100°C
VCC = 2.8 V to 6 V, V
IN
= 1.7 V to 6 V
T
A
= 25°C
I
L
= 0.1 mA to 300 mA
T
A
= 25°C
V
OUT
= 98% of V
OUTNOM
I
L
= 300 mA
I
L
= 200 mA
I
L
= 100 mA
VCC = 3 V, V
IN
= 1.8 V
f = 10 Hz–100 kHz, C
L
= 1 µF
I
L
= 300 mA
I
L
= 300 mA, T
A
= –40°C to +100°C
I
L
= 300 mA, T
A
= 0°C to 100°C
I
L
= 300 mA, T
A
= 25°C
I
L
= 200 mA
I
L
= 0.1 mA
I
L
= 300 mA
SD = 0 V, VCC = 6 V, V
IN
= 1.8 V
ON
OFF
0
SD
6 V
T
A
= 25°C, VCC = 6 V, V
IN
= 6 V
T
A
= 100°C, VCC = 6 V, V
IN
= 6 V
V
PWRGD
= 1.2 V, VCC = 3.0 V
I
PWRGD
= 300 µA
I
PWRGD
= 300 µA
I
L
= 3 mA to 300 mA,
C
OUT
= 1 µF to 10 µF
I
L
= 3 mA to 300 mA,
C
OUT
= 1 µF to 10 µF
I
L
= 3 mA to 300 mA,
C
OUT
= 1 µF to 10 µF
I
L
= 100 mA
–5.0
+5.0
%
Line Regulation
Load Regulation
Dropout Voltage
V
DROP
0.04
0.12
mV/V
mV/mA
Current Limiting
Output Noise
OPERATING CURRENTS
Ground Current in Regulation
I
LIM
V
NOISE
190
125
70
450
60
450
mV
mV
mV
mA
µV rms
I
GND
VCC Current in Regulation
Ground Current in Shutdown
SHUTDOWN
Threshold Voltage
SD
Input Current
Output Current in Shutdown
PWRGD
Output Current
Output Low Voltage
Output High Voltage
On-Time Delay
I
VCC
I
GNDSD
V
THSD
I
SD
I
OSD
3.0
3.0
3.0
2.0
100
100
0.01
VCC – 0.9
1.4
0.01
0.01
0.85
1.5
8.5
6.0
4.0
175
170
2
mA
mA
mA
mA
µA
µA
µA
V
V
µA
µA
µA
mA
V
V
µs
µs
µs
0.6
7
1
2
I
PWRGDL
V
PWRGDL3
V
PWRGDH3
TD1
4
TD2
5
0.4
VCC – 0.4
5
50
0.05
300
300
1
Off-Time Delay
THERMAL PROTECTION
Shutdown Temperature
TD3
6
TH
PROT
165
°C
NOTES
1
All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.
2
Ambient temperature of 100°C corresponds to a junction temperature of 125°C under typical full load test conditions.
3
V
PWRGDL
, V
PWRGDH
: Power good output voltages. Guaranteed by design and characterization.
4
TD1: Delay time from V
OUT
crossing 1 V to PWRGD high. Guaranteed by design.
5
TD2: Delay time from
SD
high to PWRGD high. Guaranteed by design.
6
TD3: Delay time between
SD
low to PWRGD low. Guaranteed by design.
Specifications subject to change without notice.
–2–
REV. B
ADP3342
ABSOLUTE MAXIMUM RATINGS*
PIN CONFIGURATION
NC
OUT
VCC
GND
1
2
3
4
8
Input Supply Voltage . . . . . . . . . . . . . . . . . . . –0.3 V to +13 V
Shutdown Input Voltage . . . . . . . . . . . . . . . . –0.3 V to +13 V
Power Dissipation . . . . . . . . . . . . . . . . . . . . Internally Limited
Operating Ambient Temperature Range . . . –40°C to +100°C
Operating Junction Temperature Range . . . –40°C to +150°C
JA
(2-Layer Board) . . . . . . . . . . . . . . . . . . . . . . . . . . 205°C/W
JA
(4-Layer Board) . . . . . . . . . . . . . . . . . . . . . . . . . . 142°C/W
JC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56°C/W
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range (Soldering 10 sec) . . . . . . . . . 300°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . 215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220°C
*Stresses
above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability. Absolute maximum
ratings apply individually only, not in combination. Unless otherwise specified, all
other voltages are referenced to GND.
NC
IN
SD
PWRGD
ADP3342
7
TOP VIEW
(Not to Scale)
6
5
NC = NO CONNECT
ORDERING GUIDE
Model
Output Voltage*
Package Option
RM-8 (MSOP-8)
RM-8 (MSOP-8)
Marking Code
LJA
LJB
Temperature Range
0°C to 100°C
–40°C to +100°C
ADP3342JRM-REEL7 1.2 V
ADP3342ARM-REEL7 1.2 V
*Contact
the factory for other output voltage options.
PIN FUNCTION DESCRIPTIONS
Pin No.
1, 8
2
3
4
5
6
7
Mnemonic
NC
OUT
VCC
GND
PWRGD
SD
IN
Function
No Connection.
Output of the Regulator. Bypass to ground with a 1.0 µF or larger capacitor. All pins must be
connected together for proper operation.
Supply Voltage.
Ground Pin.
Power Good. Used to indicate that output is in regulation.
Active Low Shutdown Pin. Connect to ground to disable the regulator output. When shutdown
is not used, this pin should be connected to the VCC pin.
Regulator Input. All pins.
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
ADP3342 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. B
–3–
ADP3342–Typical Performance Characteristics
1.25
1.24
V
OUT
= 1.2V
V
CC
= 3V
OUTPUT VOLTAGE – V
1.23
V
IN
= 1.8V
V
CC
= 3.0V
1.22
120
110
V
OUT
= 1.2V
V
CC
= 3V
I
L
= 0 A
OUTPUT VOLTAGE – V
1.23
1.22
1.21
1.20
I
L
= 200mA
1.19
1.18
1.17
1.7
I
L
= 300mA
I
L
= 0mA
GROUND CURRENT – A
0
50
100
150
200
OUTPUT LOAD – mA
250
300
0
100
90
80
70
60
1.21
I
L
= 100mA
1.20
1.19
1.18
2.7
3.7
4.7
INPUT VOLTAGE – V
5.7
1.17
50
1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2 5.6 6.0
INPUT VOLTAGE – V
TPC 1. Line Regulation Output
Voltage vs. Supply Voltage
TPC 2. Output Voltage vs.
Load Current
TPC 3. Ground Current vs.
Supply Voltage
3.5
3.0
GROUND CURRENT – mA
V
IN
= 1.8V
V
CC
= 3.0V
OUTPUT CHANNEL – %
200mA
GROUND CURRENT – mA
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
5.50
5.00
4.50
4.00
3.50
3.00
2.50
2.00
1.50
1.00
0.50
0
–40
I
L
= 0mA
–20
0
20
40
60
80
JUNCTION TEMPERATURE – C
100
I
L
= 100mA
I
L
= 200mA
I
L
= 300mA
V
CC
= 3.0V
V
IN
= 1.8V
2.5
2.0
1.5
1.0
0.5
0
0
50
100
150
200
OUTPUT LOAD – mA
250
300
300mA
0
–0.1
–0.2
–0.3
–0.4
0
25
50
75 100 125 150
–50 –25
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
GROUND CURRENT @ 300mA LOAD – mA
0.25
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
–40 –25 –10
MIN
TYP
MAX
INPUT-OUTPUT VOLTAGE – V
V
CC
= 3.0V
V
IN
= 1.8V
INPUT/OUTPUT VOLTAGE – V
6
5
4
3
2
1
0
–1
–2
0
200
400
600
TIME – s
800
1000
V
OUT
= 1.2V
SD
= V
IN
R
L
= 4
0.20
0.15
0.10
0.05
0
0
50
100
150
200
OUTPUT LOAD – mA
250
300
5 20 35 50 65
TEMPERATURE – C
80
95
0
TPC 7. Dropout Voltage vs.
Output Current
TPC 8. Ground Current @ 300 mA
Load vs. Ambient Temperature
TPC 9. Power-Up/Power-Down
–4–
REV. B
ADP3342
V
OUT
– V
V
OUT
– V
1.32
1.22
1.12
V
V
CC
= 3V
C
L
= 1 F
R
L
= 4
1.32
1.22
1.12
3.00
V
CC
= 3V
C
L
= 10 F
R
L
= 4
0
1.3
1.2
1.1
V
CC
= 3V
V
IN
= 1.8V
C
L
= 1 F
V
IN
– V
3.00
V
IN
– V
400
mA
0
40
80
120
TIME – s
160
200
1.80
1.80
200
5
0
40
80
120
TIME – s
160
200
0
400
800
1200
TIME – s
1600
2000
TPC 10. Line Transient Response
TPC 11. Line Transient Response
TPC 12. Load Transient Response
0
1.3
V
1.2
0
SD
– V PWRGD – V OUTPUT – V
V
IN
= 1.8V
2.0
1.0
0
3.0
0
1.8
0
–200
200
600
1000
TIME – s
1.2
1.1
V
CC
= 3V
V
IN
= 1.8V
C
L
= 10 F
V
V
CC
= 3V
R
L
= 4
V
IN
= 1.8V
400
mA
1.0
0.5
0
200
5
0
400
800
1200
TIME – s
1600
2000
A
0
200
400
600
TIME – s
800
1000
1400
1800
TPC 13. Load Transient Response
TPC 14. Short Circuit Current
TPC 15. Power-On/Power-Off
Response from Shutdown
SD
– V PWRGD – V OUTPUT – V
SD
– V PWRGD – V OUTPUT – V
2.0
1.0
0
V
CC
= 3V
V
IN
= 1.8V
R
L
= 4
OUTPUT – V
2.0
1.0
0
V
CC
= 3V
V
IN
= 1.8V
R
L
= 4
2.0
1.0
0
V
IN
= 1.8V
SD
= 3.0V
R
L
= 4
3.0
0
1.8
0
0
100
200
300
TIME – s
400
500
3.0
0
1.8
0
2
6
10
TIME – s
14
V
CC
– V
3.0
0
200
600
1000
1400
TIME – s
1800
18
TPC 16. Turn On Delay
TPC 17. Turn Off Delay
TPC 18. Power-On/Power-Off
Response from V
CC
REV. B
–5–
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